From 23677cb49a09433ff46122ecd428722992dcdfec Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 5 Sep 2016 22:30:40 +0530
Subject: [PATCH 001/137] upgraded to RxJava2 RC2

---
 README.md        | 2 +-
 app/build.gradle | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 31b02c7..867dd7a 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Users switching from 1.x to 2.x have to re-organize their imports, but carefully
 
 Add this in your build.gradle
 ```groovy
-compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC1'
+compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC2'
 ```
 If you are using RxAndroid also, then add the following
 ```groovy
diff --git a/app/build.gradle b/app/build.gradle
index f0cb4a3..eb5546f 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,6 +23,6 @@ dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:24.1.1'
-    compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC1'
+    compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC2'
     compile 'io.reactivex.rxjava2:rxandroid:2.0.0-RC1'
 }

From 3b09bd58665002848171adb83921aef2ad723bf3 Mon Sep 17 00:00:00 2001
From: ankitPagalGuy <ankit.choudhary@pagalguy.com>
Date: Tue, 13 Sep 2016 09:59:25 +0530
Subject: [PATCH 002/137] Distinct Operator example

---
 .../samples/DistinctExampleActivity.java      | 75 +++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/DistinctExampleActivity.java

diff --git a/app/src/main/java/com/rxjava2/android/samples/DistinctExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/DistinctExampleActivity.java
new file mode 100644
index 0000000..dc8f5e2
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/DistinctExampleActivity.java
@@ -0,0 +1,75 @@
+package com.rxjava2.android.samples;
+
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import com.rxjava2.android.samples.utils.AppConstant;
+import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
+
+/**
+ * Created by techteam on 13/09/16.
+ */
+public class DistinctExampleActivity extends AppCompatActivity {
+
+  private static final String TAG = DistinctExampleActivity.class.getSimpleName();
+  Button btn;
+  TextView textView;
+
+  @Override protected void onCreate(@Nullable Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.activity_example);
+    btn = (Button) findViewById(R.id.btn);
+    textView = (TextView) findViewById(R.id.textView);
+
+    btn.setOnClickListener(new View.OnClickListener() {
+      @Override
+      public void onClick(View view) {
+        doSomeWork();
+      }
+    });
+  }
+
+
+  private void doSomeWork(){
+
+     getObservable().distinct() .subscribe(getObserver());
+  }
+
+  private Observable<Integer> getObservable() {
+    return Observable.just(1, 2, 1, 1, 2, 3, 4 ,6, 4);
+  }
+
+
+  private Observer<Integer> getObserver() {
+    return new Observer<Integer>() {
+
+      @Override
+      public void onSubscribe(Disposable d) {
+        Log.d(TAG, " onSubscribe : " + d.isDisposed());
+      }
+
+      @Override
+      public void onNext(Integer value) {
+        textView.append(" onNext : value : " + value);
+        textView.append(AppConstant.LINE_SEPARATOR);
+        Log.d(TAG, " onNext value : " + value);
+      }
+
+      @Override
+      public void onError(Throwable e) {
+        Log.d(TAG, " onError : " + e.getMessage());
+      }
+
+      @Override
+      public void onComplete() {
+        Log.d(TAG, " onComplete");
+      }
+    };
+  }
+}

From b33b30de1cbf73d1990aa11e51cc39febbaf734e Mon Sep 17 00:00:00 2001
From: ankitPagalGuy <ankit.choudhary@pagalguy.com>
Date: Tue, 13 Sep 2016 10:00:49 +0530
Subject: [PATCH 003/137] new button added

---
 app/src/main/res/layout/activity_main.xml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 9e56827..9a23361 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -141,5 +141,11 @@
             android:text="@string/defer"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startDistinctActivity"
+            android:text="@string/distinct"
+            android:textColor="@android:color/black" />
     </LinearLayout>
 </ScrollView>

From e6a20a2e670f0c66d289d445339b17560a164348 Mon Sep 17 00:00:00 2001
From: ankitPagalGuy <ankit.choudhary@pagalguy.com>
Date: Tue, 13 Sep 2016 10:01:20 +0530
Subject: [PATCH 004/137] new string added

---
 app/src/main/res/values/strings.xml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 21a228b..056d17a 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -19,4 +19,5 @@
     <string name="concat">Concat</string>
     <string name="merge">Merge</string>
     <string name="defer">Defer</string>
+    <string name="distinct">Distinct</string>
 </resources>

From 36f8e543e38df172748f74a2fd8b3f9999b567eb Mon Sep 17 00:00:00 2001
From: ankitPagalGuy <ankit.choudhary@pagalguy.com>
Date: Tue, 13 Sep 2016 10:02:57 +0530
Subject: [PATCH 005/137] new method added

---
 .../main/java/com/rxjava2/android/samples/MainActivity.java   | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
index a581b75..658f257 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
@@ -84,4 +84,8 @@ public void startMergeActivity(View view) {
     public void startDeferActivity(View view) {
         startActivity(new Intent(MainActivity.this, DeferExampleActivity.class));
     }
+
+    public void startDistinctActivity(View view) {
+      startActivity(new Intent(MainActivity.this, DistinctExampleActivity.class));
+    }
 }

From 522d93fb3dcab288c7383ac1ea11fe98199ad138 Mon Sep 17 00:00:00 2001
From: ankitPagalGuy <ankit.choudhary@pagalguy.com>
Date: Tue, 13 Sep 2016 10:03:32 +0530
Subject: [PATCH 006/137] DistictExampleActivity added

---
 app/src/main/AndroidManifest.xml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index ca3c1a9..f2531d4 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -70,6 +70,10 @@
         <activity
             android:name=".DeferExampleActivity"
             android:label="@string/defer" />
+
+        <activity
+            android:name=".DistinctExampleActivity"
+            android:label="@string/defer" />
     </application>
 
 </manifest>
\ No newline at end of file

From ff0909758016ffd1b488143f45edbe0b93379f05 Mon Sep 17 00:00:00 2001
From: ankitPagalGuy <ankit.choudhary@pagalguy.com>
Date: Tue, 13 Sep 2016 10:04:11 +0530
Subject: [PATCH 007/137] minor change

---
 app/src/main/AndroidManifest.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index f2531d4..b27e314 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -73,7 +73,7 @@
 
         <activity
             android:name=".DistinctExampleActivity"
-            android:label="@string/defer" />
+            android:label="@string/distinct" />
     </application>
 
 </manifest>
\ No newline at end of file

From 2898dd38a796a0a9f3daeb01dca88432061f8f65 Mon Sep 17 00:00:00 2001
From: ankitPagalGuy <ankit.choudhary@pagalguy.com>
Date: Wed, 14 Sep 2016 00:50:28 +0530
Subject: [PATCH 008/137] new class added to show usage of LastOperator

---
 .../samples/LastOperatorExampleActivity.java  | 73 +++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/LastOperatorExampleActivity.java

diff --git a/app/src/main/java/com/rxjava2/android/samples/LastOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/LastOperatorExampleActivity.java
new file mode 100644
index 0000000..8a55cfb
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/LastOperatorExampleActivity.java
@@ -0,0 +1,73 @@
+package com.rxjava2.android.samples;
+
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import com.rxjava2.android.samples.utils.AppConstant;
+import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
+
+/**
+ * Created by techteam on 13/09/16.
+ */
+public class LastOperatorExampleActivity extends AppCompatActivity {
+
+  private static final String TAG = DistinctExampleActivity.class.getSimpleName();
+  Button btn;
+  TextView textView;
+
+
+  @Override protected void onCreate(@Nullable Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.activity_example);
+    btn = (Button) findViewById(R.id.btn);
+    textView = (TextView) findViewById(R.id.textView);
+
+    btn.setOnClickListener(new View.OnClickListener() {
+      @Override
+      public void onClick(View view) {
+        doSomeWork();
+      }
+    });
+  }
+
+  private void doSomeWork(){
+    getObservable().last() .subscribe(getObserver());
+  }
+
+  private Observable<String> getObservable() {
+    return Observable.just("A1", "A2", "A3", "A4", "A5", "A6");
+  }
+
+  private Observer<String> getObserver() {
+    return new Observer<String>() {
+
+      @Override
+      public void onSubscribe(Disposable d) {
+        Log.d(TAG, " onSubscribe : " + d.isDisposed());
+      }
+
+      @Override public void onNext(String value) {
+        textView.append(" onNext : value : " + value);
+        textView.append(AppConstant.LINE_SEPARATOR);
+        Log.d(TAG, " onNext value : " + value);
+      }
+
+
+      @Override
+      public void onError(Throwable e) {
+        Log.d(TAG, " onError : " + e.getMessage());
+      }
+
+      @Override
+      public void onComplete() {
+        Log.d(TAG, " onComplete");
+      }
+    };
+  }
+}

From c72439d21d7b5a2c685f6af8ab97029df781e886 Mon Sep 17 00:00:00 2001
From: ankitPagalGuy <ankit.choudhary@pagalguy.com>
Date: Wed, 14 Sep 2016 00:50:53 +0530
Subject: [PATCH 009/137] new class declared in manifest

---
 app/src/main/AndroidManifest.xml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index b27e314..ae9be2f 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -74,6 +74,9 @@
         <activity
             android:name=".DistinctExampleActivity"
             android:label="@string/distinct" />
+        <activity
+            android:name=".LastOperatorExampleActivity"
+            android:label="@string/distinct" />
     </application>
 
 </manifest>
\ No newline at end of file

From ca2011e4b07ed062fe0e168c6ecae3775a085232 Mon Sep 17 00:00:00 2001
From: ankitPagalGuy <ankit.choudhary@pagalguy.com>
Date: Wed, 14 Sep 2016 00:51:34 +0530
Subject: [PATCH 010/137] ui changes to include one more button

---
 app/src/main/res/layout/activity_main.xml | 7 +++++++
 app/src/main/res/values/strings.xml       | 1 +
 2 files changed, 8 insertions(+)

diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 9a23361..95bd666 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -147,5 +147,12 @@
             android:onClick="startDistinctActivity"
             android:text="@string/distinct"
             android:textColor="@android:color/black" />
+
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startLastOperatorActivity"
+            android:text="@string/last"
+            android:textColor="@android:color/black" />
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 056d17a..d55ac53 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -20,4 +20,5 @@
     <string name="merge">Merge</string>
     <string name="defer">Defer</string>
     <string name="distinct">Distinct</string>
+    <string name="last">Last</string>
 </resources>

From aab6a55c9b28268408c31595f53ce17d4c9d4fc5 Mon Sep 17 00:00:00 2001
From: ankitPagalGuy <ankit.choudhary@pagalguy.com>
Date: Wed, 14 Sep 2016 00:52:04 +0530
Subject: [PATCH 011/137] new method added

---
 .../main/java/com/rxjava2/android/samples/MainActivity.java   | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
index 658f257..a2b8e73 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
@@ -88,4 +88,8 @@ public void startDeferActivity(View view) {
     public void startDistinctActivity(View view) {
       startActivity(new Intent(MainActivity.this, DistinctExampleActivity.class));
     }
+
+    public void startLastOperatorActivity(View view){
+      startActivity(new Intent(MainActivity.this, LastOperatorExampleActivity.class ));
+    }
 }

From 9656428e609022c5c4c342016472b5a9958e236f Mon Sep 17 00:00:00 2001
From: Liverm0r <arturdumchev@yandex.ru>
Date: Sat, 17 Sep 2016 02:58:46 +0300
Subject: [PATCH 012/137] Make ReplayExampleActivity's second observer's text
 more readable

---
 .../java/com/rxjava2/android/samples/ReplayExampleActivity.java | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ReplayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ReplayExampleActivity.java
index 320cf31..4ce591a 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ReplayExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ReplayExampleActivity.java
@@ -101,11 +101,13 @@ private Observer<Integer> getSecondObserver() {
             public void onSubscribe(Disposable d) {
                 textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
                 Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
+                textView.append(AppConstant.LINE_SEPARATOR);
             }
 
             @Override
             public void onNext(Integer value) {
                 textView.append(" Second onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
                 Log.d(TAG, " Second onNext value : " + value);
             }
 

From a6d81ab3cb6e8cef7eec38d73368377233fdee98 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 23 Sep 2016 14:14:07 +0530
Subject: [PATCH 013/137] upgraded to RxJava2 RC3, few changes done in
 examples.

---
 app/build.gradle                              |  2 +-
 .../samples/FlowableExampleActivity.java      | 26 +++++++++----------
 .../android/samples/MapExampleActivity.java   |  2 +-
 .../samples/ReduceExampleActivity.java        | 16 ++++++------
 .../android/samples/ZipExampleActivity.java   |  4 +--
 build.gradle                                  |  2 +-
 gradle/wrapper/gradle-wrapper.properties      |  4 +--
 7 files changed, 28 insertions(+), 28 deletions(-)

diff --git a/app/build.gradle b/app/build.gradle
index eb5546f..775d571 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,6 +23,6 @@ dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:24.1.1'
-    compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC2'
+    compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC3'
     compile 'io.reactivex.rxjava2:rxandroid:2.0.0-RC1'
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/FlowableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/FlowableExampleActivity.java
index 0c4fa11..cbead49 100644
--- a/app/src/main/java/com/rxjava2/android/samples/FlowableExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/FlowableExampleActivity.java
@@ -10,8 +10,9 @@
 import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Flowable;
+import io.reactivex.SingleObserver;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.functions.BiFunction;
-import io.reactivex.subscribers.DefaultSubscriber;
 
 /**
  * Created by amitshekhar on 27/08/16.
@@ -53,27 +54,26 @@ public Integer apply(Integer t1, Integer t2) {
 
     }
 
-    private DefaultSubscriber<Integer> getObserver() {
-        return new DefaultSubscriber<Integer>() {
+    private SingleObserver<Integer> getObserver() {
+
+        return new SingleObserver<Integer>() {
             @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
             }
 
             @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
+            public void onSuccess(Integer value) {
+                textView.append(" onSuccess : value : " + value);
                 textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
+                Log.d(TAG, " onSuccess : value : " + value);
             }
 
             @Override
-            public void onNext(Integer value) {
-                textView.append(" onNext : value : " + value);
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
                 textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext value : " + value);
+                Log.d(TAG, " onError : " + e.getMessage());
             }
         };
     }
diff --git a/app/src/main/java/com/rxjava2/android/samples/MapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/MapExampleActivity.java
index 6448a93..6ddd151 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MapExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MapExampleActivity.java
@@ -73,7 +73,7 @@ private Observable<List<ApiUser>> getObservable() {
         return Observable.create(new ObservableOnSubscribe<List<ApiUser>>() {
             @Override
             public void subscribe(ObservableEmitter<List<ApiUser>> e) throws Exception {
-                if (!e.isCancelled()) {
+                if (!e.isDisposed()) {
                     e.onNext(Utils.getApiUserList());
                     e.onComplete();
                 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ReduceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ReduceExampleActivity.java
index 878d09b..68fbfd6 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ReduceExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ReduceExampleActivity.java
@@ -9,8 +9,8 @@
 
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import io.reactivex.MaybeObserver;
 import io.reactivex.Observable;
-import io.reactivex.Observer;
 import io.reactivex.disposables.Disposable;
 import io.reactivex.functions.BiFunction;
 
@@ -48,26 +48,26 @@ private void doSomeWork() {
                     public Integer apply(Integer t1, Integer t2) {
                         return t1 + t2;
                     }
-                }).subscribe(getObserver());
+                })
+                .subscribe(getObserver());
     }
 
     private Observable<Integer> getObservable() {
         return Observable.just(1, 2, 3, 4);
     }
 
-    private Observer<Integer> getObserver() {
-        return new Observer<Integer>() {
-
+    private MaybeObserver<Integer> getObserver() {
+        return new MaybeObserver<Integer>() {
             @Override
             public void onSubscribe(Disposable d) {
                 Log.d(TAG, " onSubscribe : " + d.isDisposed());
             }
 
             @Override
-            public void onNext(Integer value) {
-                textView.append(" onNext : value : " + value);
+            public void onSuccess(Integer value) {
+                textView.append(" onSuccess : value : " + value);
                 textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext : value : " + value);
+                Log.d(TAG, " onSuccess : value : " + value);
             }
 
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ZipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ZipExampleActivity.java
index 034f1f5..abbcc3d 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ZipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ZipExampleActivity.java
@@ -71,7 +71,7 @@ private Observable<List<User>> getCricketFansObservable() {
         return Observable.create(new ObservableOnSubscribe<List<User>>() {
             @Override
             public void subscribe(ObservableEmitter<List<User>> e) throws Exception {
-                if (!e.isCancelled()) {
+                if (!e.isDisposed()) {
                     e.onNext(Utils.getUserListWhoLovesCricket());
                     e.onComplete();
                 }
@@ -83,7 +83,7 @@ private Observable<List<User>> getFootballFansObservable() {
         return Observable.create(new ObservableOnSubscribe<List<User>>() {
             @Override
             public void subscribe(ObservableEmitter<List<User>> e) throws Exception {
-                if (!e.isCancelled()) {
+                if (!e.isDisposed()) {
                     e.onNext(Utils.getUserListWhoLovesFootball());
                     e.onComplete();
                 }
diff --git a/build.gradle b/build.gradle
index aff4f41..a3330d4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.2'
+        classpath 'com.android.tools.build:gradle:2.2.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 122a0dc..48443aa 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Mon Dec 28 10:00:20 PST 2015
+#Fri Sep 23 13:51:37 IST 2016
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip

From ea24e56db6b21227aab1185f42a6f17b0c3bf8e7 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 23 Sep 2016 14:18:40 +0530
Subject: [PATCH 014/137] upgraded to RxJava2 RC3, few changes done in
 examples.

---
 .../samples/LastOperatorExampleActivity.java  | 90 ++++++++++---------
 1 file changed, 46 insertions(+), 44 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/LastOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/LastOperatorExampleActivity.java
index 8a55cfb..d17a22b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/LastOperatorExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/LastOperatorExampleActivity.java
@@ -7,9 +7,11 @@
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;
+
 import com.rxjava2.android.samples.utils.AppConstant;
+
 import io.reactivex.Observable;
-import io.reactivex.Observer;
+import io.reactivex.SingleObserver;
 import io.reactivex.disposables.Disposable;
 
 /**
@@ -17,57 +19,57 @@
  */
 public class LastOperatorExampleActivity extends AppCompatActivity {
 
-  private static final String TAG = DistinctExampleActivity.class.getSimpleName();
-  Button btn;
-  TextView textView;
-
+    private static final String TAG = DistinctExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
 
-  @Override protected void onCreate(@Nullable Bundle savedInstanceState) {
-    super.onCreate(savedInstanceState);
-    setContentView(R.layout.activity_example);
-    btn = (Button) findViewById(R.id.btn);
-    textView = (TextView) findViewById(R.id.textView);
 
-    btn.setOnClickListener(new View.OnClickListener() {
-      @Override
-      public void onClick(View view) {
-        doSomeWork();
-      }
-    });
-  }
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
 
-  private void doSomeWork(){
-    getObservable().last() .subscribe(getObserver());
-  }
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
-  private Observable<String> getObservable() {
-    return Observable.just("A1", "A2", "A3", "A4", "A5", "A6");
-  }
+    private void doSomeWork() {
+        getObservable().last("A1") // the default item ("A1") to emit if the source ObservableSource is empty
+                .subscribe(getObserver());
+    }
 
-  private Observer<String> getObserver() {
-    return new Observer<String>() {
+    private Observable<String> getObservable() {
+        return Observable.just("A1", "A2", "A3", "A4", "A5", "A6");
+    }
 
-      @Override
-      public void onSubscribe(Disposable d) {
-        Log.d(TAG, " onSubscribe : " + d.isDisposed());
-      }
+    private SingleObserver<String> getObserver() {
+        return new SingleObserver<String>() {
 
-      @Override public void onNext(String value) {
-        textView.append(" onNext : value : " + value);
-        textView.append(AppConstant.LINE_SEPARATOR);
-        Log.d(TAG, " onNext value : " + value);
-      }
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
 
+            @Override
+            public void onSuccess(String value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext value : " + value);
+            }
 
-      @Override
-      public void onError(Throwable e) {
-        Log.d(TAG, " onError : " + e.getMessage());
-      }
 
-      @Override
-      public void onComplete() {
-        Log.d(TAG, " onComplete");
-      }
-    };
-  }
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+        };
+    }
 }

From 45229984260513832f27e2315936af6edcf2ca3d Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 21 Oct 2016 13:48:48 +0530
Subject: [PATCH 015/137] upgraded to RxJava2 RC5

---
 app/build.gradle | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/build.gradle b/app/build.gradle
index 775d571..c907d89 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,6 +23,6 @@ dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:24.1.1'
-    compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC3'
+    compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC5'
     compile 'io.reactivex.rxjava2:rxandroid:2.0.0-RC1'
 }

From 7dcd17d6477782c9134d05172407bbc2eddec5bc Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 21 Oct 2016 13:50:22 +0530
Subject: [PATCH 016/137] upgraded to RxJava2 RC5

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 867dd7a..fe4054b 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Users switching from 1.x to 2.x have to re-organize their imports, but carefully
 
 Add this in your build.gradle
 ```groovy
-compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC2'
+compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC5'
 ```
 If you are using RxAndroid also, then add the following
 ```groovy

From bfc949723844befd15b1c3f2aabea8582ef2fe49 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Wed, 2 Nov 2016 16:13:59 +0530
Subject: [PATCH 017/137] Update RxJava2 to 2.0.0

---
 README.md        | 4 ++--
 app/build.gradle | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index fe4054b..7c5b848 100644
--- a/README.md
+++ b/README.md
@@ -24,11 +24,11 @@ Users switching from 1.x to 2.x have to re-organize their imports, but carefully
 
 Add this in your build.gradle
 ```groovy
-compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC5'
+compile 'io.reactivex.rxjava2:rxjava:2.0.0'
 ```
 If you are using RxAndroid also, then add the following
 ```groovy
-compile 'io.reactivex.rxjava2:rxandroid:2.0.0-RC1'
+compile 'io.reactivex.rxjava2:rxandroid:2.0.0'
 ```
 
 # RxJava 2 Examples present in this sample project
diff --git a/app/build.gradle b/app/build.gradle
index c907d89..82b3e53 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,6 +23,6 @@ dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:24.1.1'
-    compile 'io.reactivex.rxjava2:rxjava:2.0.0-RC5'
-    compile 'io.reactivex.rxjava2:rxandroid:2.0.0-RC1'
+    compile 'io.reactivex.rxjava2:rxjava:2.0.0'
+    compile 'io.reactivex.rxjava2:rxandroid:2.0.0'
 }

From a52dd3cff3dbd942126b7bf7c2bac60e7c9fa509 Mon Sep 17 00:00:00 2001
From: Wonyoung <wonyoung@Wonyoungui-MacBook-Pro.local>
Date: Mon, 7 Nov 2016 18:51:13 +0900
Subject: [PATCH 018/137] gradle version up

---
 build.gradle | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build.gradle b/build.gradle
index a3330d4..c20bca1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.0'
+        classpath 'com.android.tools.build:gradle:2.2.2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

From 7b371f0de029ff9a8e91170f2e1341ac44e657b0 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 15 Nov 2016 13:52:14 +0530
Subject: [PATCH 019/137] Change : description

---
 .../java/com/rxjava2/android/samples/MergeExampleActivity.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/MergeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/MergeExampleActivity.java
index 088d8d7..d8ae8c0 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MergeExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MergeExampleActivity.java
@@ -38,7 +38,7 @@ public void onClick(View view) {
     }
 
     /*
-     * Using merge operator to combine Observable : merge maintain does not
+     * Using merge operator to combine Observable : merge does not maintain
      * the order of Observable.
      * It will emit all the 7 values may not be in order
      * Ex - "A1", "B1", "A2", "A3", "A4", "B2", "B3" - may be anything

From f2bbe13f2c267cdcc051792dc9283be2348affc1 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 18 Nov 2016 11:42:11 +0530
Subject: [PATCH 020/137] few changes

---
 README.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 7c5b848..4373b21 100644
--- a/README.md
+++ b/README.md
@@ -99,14 +99,15 @@ RxJava1 -> RxJava2
 ### Found this project useful :heart:
 * Support by clicking the :star: button on the upper right of this page. :v:
 
+### Check out an awesome library for fast and simple networking in Android.
+* [Fast Android Networking Library](https://github.com/amitshekhariitbhu/Fast-Android-Networking)
+
 ### Contact - Let's become friend
 - [Twitter](https://twitter.com/amitiitbhu)
 - [Github](https://github.com/amitshekhariitbhu)
 - [Medium](https://medium.com/@amitshekhar)
 - [Facebook](https://www.facebook.com/amit.shekhar.iitbhu)
 
-### Check out [Fast Android Networking Library](https://github.com/amitshekhariitbhu/Fast-Android-Networking) for simple and easy networking in Android.
-
 ### License
 ```
    Copyright (C) 2016 Amit Shekhar

From f2dbeae4dce19cc3237a952d29f88a44f709d4aa Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 18 Nov 2016 16:43:12 +0530
Subject: [PATCH 021/137] few changes

---
 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 4373b21..e39a6d2 100644
--- a/README.md
+++ b/README.md
@@ -96,8 +96,8 @@ RxJava1 -> RxJava2
 
 * Many examples are to be added 
 
-### Found this project useful :heart:
-* Support by clicking the :star: button on the upper right of this page. :v:
+### Find this project useful ? :heart:
+* Support it clicking the :star: button on the upper right of this page. :v:
 
 ### Check out an awesome library for fast and simple networking in Android.
 * [Fast Android Networking Library](https://github.com/amitshekhariitbhu/Fast-Android-Networking)

From 94376b9dc988c8e21191b7dd93777de89fe9cb17 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 18 Nov 2016 16:43:37 +0530
Subject: [PATCH 022/137] few changes

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index e39a6d2..0fb99c9 100644
--- a/README.md
+++ b/README.md
@@ -97,7 +97,7 @@ RxJava1 -> RxJava2
 * Many examples are to be added 
 
 ### Find this project useful ? :heart:
-* Support it clicking the :star: button on the upper right of this page. :v:
+* Support it by clicking the :star: button on the upper right of this page. :v:
 
 ### Check out an awesome library for fast and simple networking in Android.
 * [Fast Android Networking Library](https://github.com/amitshekhariitbhu/Fast-Android-Networking)

From 79cae1e7f10b3780f3c2ed06faa9feff6a41a4ef Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 9 Dec 2016 10:46:10 +0530
Subject: [PATCH 023/137] Update library versions

---
 README.md        | 4 ++--
 app/build.gradle | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 0fb99c9..9fac2b8 100644
--- a/README.md
+++ b/README.md
@@ -24,11 +24,11 @@ Users switching from 1.x to 2.x have to re-organize their imports, but carefully
 
 Add this in your build.gradle
 ```groovy
-compile 'io.reactivex.rxjava2:rxjava:2.0.0'
+compile 'io.reactivex.rxjava2:rxjava:2.0.2'
 ```
 If you are using RxAndroid also, then add the following
 ```groovy
-compile 'io.reactivex.rxjava2:rxandroid:2.0.0'
+compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
 ```
 
 # RxJava 2 Examples present in this sample project
diff --git a/app/build.gradle b/app/build.gradle
index 82b3e53..5955173 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,6 +23,6 @@ dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:24.1.1'
-    compile 'io.reactivex.rxjava2:rxjava:2.0.0'
-    compile 'io.reactivex.rxjava2:rxandroid:2.0.0'
+    compile 'io.reactivex.rxjava2:rxjava:2.0.2'
+    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
 }

From be515c41419884c3aad53e7f97990c565dcd8e87 Mon Sep 17 00:00:00 2001
From: Landice Fu <landicefu@kkbox.com>
Date: Tue, 13 Dec 2016 14:42:06 +0800
Subject: [PATCH 024/137] add scan demo

---
 app/src/main/AndroidManifest.xml              |  4 +-
 .../rxjava2/android/samples/MainActivity.java |  4 +
 .../android/samples/ScanExampleActivity.java  | 92 +++++++++++++++++++
 app/src/main/res/layout/activity_main.xml     |  7 ++
 app/src/main/res/values/strings.xml           |  1 +
 5 files changed, 107 insertions(+), 1 deletion(-)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ScanExampleActivity.java

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index ae9be2f..626dbe5 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -58,6 +58,9 @@
         <activity
             android:name=".SkipExampleActivity"
             android:label="@string/skip" />
+        <activity
+            android:name=".ScanExampleActivity"
+            android:label="@string/scan" />
         <activity
             android:name=".ReplayExampleActivity"
             android:label="@string/replay" />
@@ -70,7 +73,6 @@
         <activity
             android:name=".DeferExampleActivity"
             android:label="@string/defer" />
-
         <activity
             android:name=".DistinctExampleActivity"
             android:label="@string/distinct" />
diff --git a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
index a2b8e73..178bc6e 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
@@ -69,6 +69,10 @@ public void startSkipActivity(View view) {
         startActivity(new Intent(MainActivity.this, SkipExampleActivity.class));
     }
 
+    public void startScanActivity(View view) {
+        startActivity(new Intent(MainActivity.this, ScanExampleActivity.class));
+    }
+
     public void startReplayActivity(View view) {
         startActivity(new Intent(MainActivity.this, ReplayExampleActivity.class));
     }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ScanExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ScanExampleActivity.java
new file mode 100644
index 0000000..c3ce226
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ScanExampleActivity.java
@@ -0,0 +1,92 @@
+package com.rxjava2.android.samples;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.functions.BiFunction;
+import io.reactivex.schedulers.Schedulers;
+
+public class ScanExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = ScanExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /* Using scan operator, it sends also the previous result */
+    private void doSomeWork() {
+        getObservable()
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .scan(new BiFunction<Integer, Integer, Integer>() {
+                    @Override
+                    public Integer apply(Integer int1, Integer int2) throws Exception {
+                        return int1 + int2;
+                    }
+                })
+                .subscribe(getObserver());
+    }
+
+    private Observable<Integer> getObservable() {
+        return Observable.just(1, 2, 3, 4, 5);
+    }
+
+    private Observer<Integer> getObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 95bd666..e8172c2 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -113,6 +113,13 @@
             android:text="@string/skip"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startScanActivity"
+            android:text="@string/scan"
+            android:textColor="@android:color/black" />
+
         <Button
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index d55ac53..073b029 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -15,6 +15,7 @@
     <string name="buffer">Buffer</string>
     <string name="filter">Filter</string>
     <string name="skip">Skip</string>
+    <string name="scan">Scan</string>
     <string name="replay">Replay</string>
     <string name="concat">Concat</string>
     <string name="merge">Merge</string>

From a1ea453bcea9a490e4f4223424973b0b18bd31eb Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 17 Dec 2016 15:01:52 +0530
Subject: [PATCH 025/137] Add ReplaySubjectExample

---
 app/src/main/AndroidManifest.xml              |   3 +
 .../rxjava2/android/samples/MainActivity.java |  10 +-
 .../android/samples/ReplaySubjectExample.java | 129 ++++++++++++++++++
 app/src/main/res/layout/activity_main.xml     |   7 +
 app/src/main/res/values/strings.xml           |   1 +
 5 files changed, 147 insertions(+), 3 deletions(-)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ReplaySubjectExample.java

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 626dbe5..ef99b52 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -79,6 +79,9 @@
         <activity
             android:name=".LastOperatorExampleActivity"
             android:label="@string/distinct" />
+        <activity
+            android:name=".ReplaySubjectExample"
+            android:label="@string/replay_subject" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
index 178bc6e..c5da9e7 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
@@ -90,10 +90,14 @@ public void startDeferActivity(View view) {
     }
 
     public void startDistinctActivity(View view) {
-      startActivity(new Intent(MainActivity.this, DistinctExampleActivity.class));
+        startActivity(new Intent(MainActivity.this, DistinctExampleActivity.class));
     }
 
-    public void startLastOperatorActivity(View view){
-      startActivity(new Intent(MainActivity.this, LastOperatorExampleActivity.class ));
+    public void startLastOperatorActivity(View view) {
+        startActivity(new Intent(MainActivity.this, LastOperatorExampleActivity.class));
+    }
+
+    public void startReplaySubjectActivity(View view) {
+        startActivity(new Intent(MainActivity.this, ReplaySubjectExample.class));
     }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ReplaySubjectExample.java b/app/src/main/java/com/rxjava2/android/samples/ReplaySubjectExample.java
new file mode 100644
index 0000000..baedec7
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ReplaySubjectExample.java
@@ -0,0 +1,129 @@
+package com.rxjava2.android.samples;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.subjects.ReplaySubject;
+
+/**
+ * Created by amitshekhar on 17/12/16.
+ */
+
+public class ReplaySubjectExample extends AppCompatActivity {
+
+    private static final String TAG = ReplaySubjectExample.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /* ReplaySubject emits to any observer all of the items that were emitted
+     * by the source Observable, regardless of when the observer subscribes.
+     */
+    private void doSomeWork() {
+
+        ReplaySubject<Integer> source = ReplaySubject.create();
+
+        source.subscribe(getFirstObserver()); // it will get 1, 2, 3, 4
+
+        source.onNext(1);
+        source.onNext(2);
+        source.onNext(3);
+        source.onNext(4);
+        source.onComplete();
+
+        /*
+         * it will emit 1, 2, 3, 4 for second observer also as we have used replay
+         */
+        source.subscribe(getSecondObserver());
+
+    }
+
+
+    private Observer<Integer> getFirstObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" First onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" First onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" First onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onComplete");
+            }
+        };
+    }
+
+    private Observer<Integer> getSecondObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
+                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
+                textView.append(AppConstant.LINE_SEPARATOR);
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" Second onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" Second onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" Second onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onComplete");
+            }
+        };
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index e8172c2..b9114f1 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -161,5 +161,12 @@
             android:onClick="startLastOperatorActivity"
             android:text="@string/last"
             android:textColor="@android:color/black" />
+
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startReplaySubjectActivity"
+            android:text="@string/replay_subject"
+            android:textColor="@android:color/black" />
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 073b029..f3ea636 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -22,4 +22,5 @@
     <string name="defer">Defer</string>
     <string name="distinct">Distinct</string>
     <string name="last">Last</string>
+    <string name="replay_subject">ReplaySubject</string>
 </resources>

From acf5bb65921aaa3f638e3207f8980447efaee0ea Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 17 Dec 2016 15:19:11 +0530
Subject: [PATCH 026/137] Add PublishSubjectExample

---
 app/src/main/AndroidManifest.xml              |   3 +
 .../rxjava2/android/samples/MainActivity.java |   4 +
 .../samples/PublishSubjectExample.java        | 130 ++++++++++++++++++
 app/src/main/res/layout/activity_main.xml     |   7 +
 app/src/main/res/values/strings.xml           |   1 +
 5 files changed, 145 insertions(+)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/PublishSubjectExample.java

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index ef99b52..f37b1db 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -82,6 +82,9 @@
         <activity
             android:name=".ReplaySubjectExample"
             android:label="@string/replay_subject" />
+        <activity
+            android:name=".PublishSubjectExample"
+            android:label="@string/publish_subject" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
index c5da9e7..3bd4ca4 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
@@ -100,4 +100,8 @@ public void startLastOperatorActivity(View view) {
     public void startReplaySubjectActivity(View view) {
         startActivity(new Intent(MainActivity.this, ReplaySubjectExample.class));
     }
+
+    public void startPublishSubjectActivity(View view) {
+        startActivity(new Intent(MainActivity.this, PublishSubjectExample.class));
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/PublishSubjectExample.java b/app/src/main/java/com/rxjava2/android/samples/PublishSubjectExample.java
new file mode 100644
index 0000000..d962345
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/PublishSubjectExample.java
@@ -0,0 +1,130 @@
+package com.rxjava2.android.samples;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.subjects.PublishSubject;
+
+/**
+ * Created by amitshekhar on 17/12/16.
+ */
+
+public class PublishSubjectExample extends AppCompatActivity {
+
+    private static final String TAG = PublishSubjectExample.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /* PublishSubject emits to an observer only those items that are emitted
+     * by the source Observable, subsequent to the time of the subscription.
+     */
+    private void doSomeWork() {
+
+        PublishSubject<Integer> source = PublishSubject.create();
+
+        source.subscribe(getFirstObserver()); // it will get 1, 2, 3, 4 and onComplete
+
+        source.onNext(1);
+        source.onNext(2);
+        source.onNext(3);
+
+        /*
+         * it will emit 4 and onComplete for second observer also as we have used replay
+         */
+        source.subscribe(getSecondObserver());
+
+        source.onNext(4);
+        source.onComplete();
+
+    }
+
+
+    private Observer<Integer> getFirstObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" First onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" First onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" First onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onComplete");
+            }
+        };
+    }
+
+    private Observer<Integer> getSecondObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
+                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
+                textView.append(AppConstant.LINE_SEPARATOR);
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" Second onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" Second onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" Second onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onComplete");
+            }
+        };
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index b9114f1..365b266 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -168,5 +168,12 @@
             android:onClick="startReplaySubjectActivity"
             android:text="@string/replay_subject"
             android:textColor="@android:color/black" />
+
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startPublishSubjectActivity"
+            android:text="@string/publish_subject"
+            android:textColor="@android:color/black" />
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index f3ea636..eae9912 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -23,4 +23,5 @@
     <string name="distinct">Distinct</string>
     <string name="last">Last</string>
     <string name="replay_subject">ReplaySubject</string>
+    <string name="publish_subject">PublishSubject</string>
 </resources>

From f1c42267cb74abbb237d59800fcbe8a8a2a30fe9 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 17 Dec 2016 15:27:04 +0530
Subject: [PATCH 027/137] Add BehaviorSubjectExample

---
 app/src/main/AndroidManifest.xml              |   3 +
 .../samples/BehaviorSubjectExample.java       | 131 ++++++++++++++++++
 .../rxjava2/android/samples/MainActivity.java |   4 +
 .../samples/PublishSubjectExample.java        |   2 +-
 app/src/main/res/layout/activity_main.xml     |   7 +
 app/src/main/res/values/strings.xml           |   1 +
 6 files changed, 147 insertions(+), 1 deletion(-)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/BehaviorSubjectExample.java

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index f37b1db..22693d1 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -85,6 +85,9 @@
         <activity
             android:name=".PublishSubjectExample"
             android:label="@string/publish_subject" />
+        <activity
+            android:name=".BehaviorSubjectExample"
+            android:label="@string/behavior_subject" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/BehaviorSubjectExample.java b/app/src/main/java/com/rxjava2/android/samples/BehaviorSubjectExample.java
new file mode 100644
index 0000000..8644d2f
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/BehaviorSubjectExample.java
@@ -0,0 +1,131 @@
+package com.rxjava2.android.samples;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.subjects.BehaviorSubject;
+
+/**
+ * Created by amitshekhar on 17/12/16.
+ */
+
+public class BehaviorSubjectExample extends AppCompatActivity {
+
+    private static final String TAG = BehaviorSubjectExample.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /* When an observer subscribes to a BehaviorSubject, it begins by emitting the item most
+     * recently emitted by the source Observable (or a seed/default value if none has yet been
+     * emitted) and then continues to emit any other items emitted later by the source Observable(s).
+     */
+    private void doSomeWork() {
+
+        BehaviorSubject<Integer> source = BehaviorSubject.create();
+
+        source.subscribe(getFirstObserver()); // it will get 1, 2, 3, 4 and onComplete
+
+        source.onNext(1);
+        source.onNext(2);
+        source.onNext(3);
+
+        /*
+         * it will emit 3(last emitted), 4 and onComplete for second observer also.
+         */
+        source.subscribe(getSecondObserver());
+
+        source.onNext(4);
+        source.onComplete();
+
+    }
+
+
+    private Observer<Integer> getFirstObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" First onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" First onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" First onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onComplete");
+            }
+        };
+    }
+
+    private Observer<Integer> getSecondObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
+                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
+                textView.append(AppConstant.LINE_SEPARATOR);
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" Second onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" Second onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" Second onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onComplete");
+            }
+        };
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
index 3bd4ca4..45e6b8c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
@@ -104,4 +104,8 @@ public void startReplaySubjectActivity(View view) {
     public void startPublishSubjectActivity(View view) {
         startActivity(new Intent(MainActivity.this, PublishSubjectExample.class));
     }
+
+    public void startBehaviorSubjectActivity(View view) {
+        startActivity(new Intent(MainActivity.this, BehaviorSubjectExample.class));
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/PublishSubjectExample.java b/app/src/main/java/com/rxjava2/android/samples/PublishSubjectExample.java
index d962345..2e4b40c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/PublishSubjectExample.java
+++ b/app/src/main/java/com/rxjava2/android/samples/PublishSubjectExample.java
@@ -52,7 +52,7 @@ private void doSomeWork() {
         source.onNext(3);
 
         /*
-         * it will emit 4 and onComplete for second observer also as we have used replay
+         * it will emit 4 and onComplete for second observer also.
          */
         source.subscribe(getSecondObserver());
 
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 365b266..84c34e6 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -175,5 +175,12 @@
             android:onClick="startPublishSubjectActivity"
             android:text="@string/publish_subject"
             android:textColor="@android:color/black" />
+
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startBehaviorSubjectActivity"
+            android:text="@string/behavior_subject"
+            android:textColor="@android:color/black" />
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index eae9912..ead5386 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -24,4 +24,5 @@
     <string name="last">Last</string>
     <string name="replay_subject">ReplaySubject</string>
     <string name="publish_subject">PublishSubject</string>
+    <string name="behavior_subject">BehaviorSubject</string>
 </resources>

From 3f9401045b1c5dc0d840beeaa7c5fef46de748f1 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 17 Dec 2016 15:32:19 +0530
Subject: [PATCH 028/137] Add AsyncSubjectExample

---
 app/src/main/AndroidManifest.xml              |   3 +
 .../android/samples/AsyncSubjectExample.java  | 131 ++++++++++++++++++
 .../rxjava2/android/samples/MainActivity.java |   4 +
 app/src/main/res/layout/activity_main.xml     |   7 +
 app/src/main/res/values/strings.xml           |   1 +
 5 files changed, 146 insertions(+)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/AsyncSubjectExample.java

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 22693d1..b9dcd6d 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -88,6 +88,9 @@
         <activity
             android:name=".BehaviorSubjectExample"
             android:label="@string/behavior_subject" />
+        <activity
+            android:name=".AsyncSubjectExample"
+            android:label="@string/behavior_subject" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/AsyncSubjectExample.java b/app/src/main/java/com/rxjava2/android/samples/AsyncSubjectExample.java
new file mode 100644
index 0000000..0b15b73
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/AsyncSubjectExample.java
@@ -0,0 +1,131 @@
+package com.rxjava2.android.samples;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.subjects.AsyncSubject;
+
+/**
+ * Created by amitshekhar on 17/12/16.
+ */
+
+public class AsyncSubjectExample extends AppCompatActivity {
+
+    private static final String TAG = AsyncSubjectExample.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /* An AsyncSubject emits the last value (and only the last value) emitted by the source
+     * Observable, and only after that source Observable completes. (If the source Observable
+     * does not emit any values, the AsyncSubject also completes without emitting any values.)
+     */
+    private void doSomeWork() {
+
+        AsyncSubject<Integer> source = AsyncSubject.create();
+
+        source.subscribe(getFirstObserver()); // it will emit only 4 and onComplete
+
+        source.onNext(1);
+        source.onNext(2);
+        source.onNext(3);
+
+        /*
+         * it will emit 4 and onComplete for second observer also.
+         */
+        source.subscribe(getSecondObserver());
+
+        source.onNext(4);
+        source.onComplete();
+
+    }
+
+
+    private Observer<Integer> getFirstObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" First onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" First onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" First onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onComplete");
+            }
+        };
+    }
+
+    private Observer<Integer> getSecondObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
+                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
+                textView.append(AppConstant.LINE_SEPARATOR);
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" Second onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" Second onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" Second onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onComplete");
+            }
+        };
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
index 45e6b8c..ff58a5b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
@@ -108,4 +108,8 @@ public void startPublishSubjectActivity(View view) {
     public void startBehaviorSubjectActivity(View view) {
         startActivity(new Intent(MainActivity.this, BehaviorSubjectExample.class));
     }
+
+    public void startAsyncSubjectActivity(View view) {
+        startActivity(new Intent(MainActivity.this, AsyncSubjectExample.class));
+    }
 }
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 84c34e6..cc92ed8 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -182,5 +182,12 @@
             android:onClick="startBehaviorSubjectActivity"
             android:text="@string/behavior_subject"
             android:textColor="@android:color/black" />
+
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startAsyncSubjectActivity"
+            android:text="@string/async_subject"
+            android:textColor="@android:color/black" />
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index ead5386..7c251e9 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -25,4 +25,5 @@
     <string name="replay_subject">ReplaySubject</string>
     <string name="publish_subject">PublishSubject</string>
     <string name="behavior_subject">BehaviorSubject</string>
+    <string name="async_subject">AsyncSubject</string>
 </resources>

From 8bcd4d4a3bf842e8913f3d9bb6546d6b21427e53 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Thu, 22 Dec 2016 12:06:00 +0530
Subject: [PATCH 029/137] Add ThrottleLastExample

---
 app/src/main/AndroidManifest.xml              |   3 +
 .../rxjava2/android/samples/MainActivity.java |   4 +
 .../samples/ThrottleLastExampleActivity.java  | 119 ++++++++++++++++++
 app/src/main/res/layout/activity_main.xml     |   8 ++
 app/src/main/res/values/strings.xml           |   1 +
 5 files changed, 135 insertions(+)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ThrottleLastExampleActivity.java

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index b9dcd6d..b810999 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -91,6 +91,9 @@
         <activity
             android:name=".AsyncSubjectExample"
             android:label="@string/behavior_subject" />
+        <activity
+            android:name=".ThrottleLastExampleActivity"
+            android:label="@string/throttle_last" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
index ff58a5b..733a6d9 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
@@ -112,4 +112,8 @@ public void startBehaviorSubjectActivity(View view) {
     public void startAsyncSubjectActivity(View view) {
         startActivity(new Intent(MainActivity.this, AsyncSubjectExample.class));
     }
+
+    public void startThrottleLastActivity(View view) {
+        startActivity(new Intent(MainActivity.this, ThrottleLastExampleActivity.class));
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ThrottleLastExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ThrottleLastExampleActivity.java
new file mode 100644
index 0000000..2fe83ac
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ThrottleLastExampleActivity.java
@@ -0,0 +1,119 @@
+package com.rxjava2.android.samples;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableEmitter;
+import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.Observer;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 22/12/16.
+ */
+
+public class ThrottleLastExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = ThrottleLastExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /*
+    * Using throttleLast() -> emit the most recent items emitted by an Observable within
+    * periodic time intervals, so here it will emit 2, 6 and 7 as we have simulated it to be the
+    * last the element in the interval of 500 millis
+    */
+    private void doSomeWork() {
+        getObservable()
+                .throttleLast(500, TimeUnit.MILLISECONDS)
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getObserver());
+    }
+
+    private Observable<Integer> getObservable() {
+        return Observable.create(new ObservableOnSubscribe<Integer>() {
+            @Override
+            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
+                // send events with simulated time wait
+                Thread.sleep(0);
+                emitter.onNext(1); // skip
+                emitter.onNext(2); // deliver
+                Thread.sleep(505);
+                emitter.onNext(3); // skip
+                Thread.sleep(99);
+                emitter.onNext(4); // skip
+                Thread.sleep(100);
+                emitter.onNext(5); // skip
+                emitter.onNext(6); // deliver
+                Thread.sleep(305);
+                emitter.onNext(7); // deliver
+                Thread.sleep(510);
+                emitter.onComplete();
+            }
+        });
+    }
+
+    private Observer<Integer> getObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" onNext : ");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                textView.append(" value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext ");
+                Log.d(TAG, " value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index cc92ed8..4ddfe3c 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -189,5 +189,13 @@
             android:onClick="startAsyncSubjectActivity"
             android:text="@string/async_subject"
             android:textColor="@android:color/black" />
+
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startThrottleLastActivity"
+            android:text="@string/throttle_last"
+            android:textColor="@android:color/black" />
+
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 7c251e9..aa2e24e 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -26,4 +26,5 @@
     <string name="publish_subject">PublishSubject</string>
     <string name="behavior_subject">BehaviorSubject</string>
     <string name="async_subject">AsyncSubject</string>
+    <string name="throttle_last">ThrottleLast</string>
 </resources>

From 64789525164d3789791c83703fd979248e944ead Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Thu, 22 Dec 2016 12:32:51 +0530
Subject: [PATCH 030/137] Add DebounceExample

---
 app/src/main/AndroidManifest.xml              |   3 +
 .../samples/DebounceExampleActivity.java      | 115 ++++++++++++++++++
 .../rxjava2/android/samples/MainActivity.java |   4 +
 app/src/main/res/layout/activity_main.xml     |   7 ++
 app/src/main/res/values/strings.xml           |   1 +
 5 files changed, 130 insertions(+)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/DebounceExampleActivity.java

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index b810999..6a213b1 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -94,6 +94,9 @@
         <activity
             android:name=".ThrottleLastExampleActivity"
             android:label="@string/throttle_last" />
+        <activity
+            android:name=".DebounceExampleActivity"
+            android:label="@string/debounce" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/DebounceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/DebounceExampleActivity.java
new file mode 100644
index 0000000..411d028
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/DebounceExampleActivity.java
@@ -0,0 +1,115 @@
+package com.rxjava2.android.samples;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableEmitter;
+import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.Observer;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 22/12/16.
+ */
+
+public class DebounceExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = DebounceExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /*
+    * Using debounce() -> only emit an item from an Observable if a particular time-span has
+    * passed without it emitting another item, so it will emit 2, 4, 5 as we have simulated it.
+    */
+    private void doSomeWork() {
+        getObservable()
+                .debounce(500, TimeUnit.MILLISECONDS)
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getObserver());
+    }
+
+    private Observable<Integer> getObservable() {
+        return Observable.create(new ObservableOnSubscribe<Integer>() {
+            @Override
+            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
+                // send events with simulated time wait
+                emitter.onNext(1); // skip
+                Thread.sleep(400);
+                emitter.onNext(2); // deliver
+                Thread.sleep(505);
+                emitter.onNext(3); // skip
+                Thread.sleep(100);
+                emitter.onNext(4); // deliver
+                Thread.sleep(605);
+                emitter.onNext(5); // deliver
+                Thread.sleep(510);
+                emitter.onComplete();
+            }
+        });
+    }
+
+    private Observer<Integer> getObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" onNext : ");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                textView.append(" value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext ");
+                Log.d(TAG, " value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
index 733a6d9..9080a31 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
@@ -116,4 +116,8 @@ public void startAsyncSubjectActivity(View view) {
     public void startThrottleLastActivity(View view) {
         startActivity(new Intent(MainActivity.this, ThrottleLastExampleActivity.class));
     }
+
+    public void startDebounceActivity(View view) {
+        startActivity(new Intent(MainActivity.this, DebounceExampleActivity.class));
+    }
 }
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 4ddfe3c..1eb937a 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -197,5 +197,12 @@
             android:text="@string/throttle_last"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startDebounceActivity"
+            android:text="@string/debounce"
+            android:textColor="@android:color/black" />
+
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index aa2e24e..391beea 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -27,4 +27,5 @@
     <string name="behavior_subject">BehaviorSubject</string>
     <string name="async_subject">AsyncSubject</string>
     <string name="throttle_last">ThrottleLast</string>
+    <string name="debounce">Debounce</string>
 </resources>

From 4ecbbb0ec305a7a83d4933531b51786b1ecadcce Mon Sep 17 00:00:00 2001
From: KyleKrueger <kyle.s.krueger@gmail.com>
Date: Mon, 26 Dec 2016 21:28:47 +0100
Subject: [PATCH 031/137] fix title for async example

---
 app/src/main/AndroidManifest.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 6a213b1..6f0d4b2 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -90,7 +90,7 @@
             android:label="@string/behavior_subject" />
         <activity
             android:name=".AsyncSubjectExample"
-            android:label="@string/behavior_subject" />
+            android:label="@string/async_subject" />
         <activity
             android:name=".ThrottleLastExampleActivity"
             android:label="@string/throttle_last" />

From 560636494efd07d95508e4b83c53a9ef104db73f Mon Sep 17 00:00:00 2001
From: wind0ws <932803995@qq.com>
Date: Thu, 12 Jan 2017 16:54:48 +0800
Subject: [PATCH 032/137] Refactor code,more example added.

---
 app/build.gradle                              |  29 ++-
 app/src/main/AndroidManifest.xml              | 120 +++++-----
 .../android/samples/AbsExampleActivity.java   | 225 ++++++++++++++++++
 .../android/samples/AsyncSubjectExample.java  | 131 ----------
 .../samples/BehaviorSubjectExample.java       | 131 ----------
 .../samples/BufferExampleActivity.java        | 103 --------
 .../samples/CompletableObserverActivity.java  |  80 -------
 .../samples/ConcatExampleActivity.java        |  92 -------
 .../samples/DebounceExampleActivity.java      | 115 ---------
 .../android/samples/DeferExampleActivity.java |  90 -------
 .../samples/DisposableExampleActivity.java    |  98 --------
 .../samples/DistinctExampleActivity.java      |  75 ------
 .../samples/FilterExampleActivity.java        |  92 -------
 .../samples/FlowableExampleActivity.java      |  80 -------
 .../samples/IntervalExampleActivity.java      |  95 --------
 .../samples/LastOperatorExampleActivity.java  |  75 ------
 .../rxjava2/android/samples/MainActivity.java |  52 +++-
 .../android/samples/MapExampleActivity.java   | 120 ----------
 .../android/samples/MergeExampleActivity.java |  90 -------
 .../android/samples/MyApplication.java        |  30 +++
 .../samples/PublishSubjectExample.java        | 130 ----------
 .../samples/ReduceExampleActivity.java        |  90 -------
 .../samples/ReplayExampleActivity.java        | 129 ----------
 .../android/samples/ReplaySubjectExample.java | 129 ----------
 .../android/samples/ScanExampleActivity.java  |  92 -------
 .../samples/SimpleExampleActivity.java        |  90 -------
 .../SingleObserverExampleActivity.java        |  71 ------
 .../android/samples/SkipExampleActivity.java  |  91 -------
 .../android/samples/TakeExampleActivity.java  |  91 -------
 .../samples/ThrottleLastExampleActivity.java  | 119 ---------
 .../rxjava2/android/samples/TimerExample.java |  92 -------
 .../android/samples/ZipExampleActivity.java   | 130 ----------
 .../android/samples/model/ApiUser.java        |   9 +
 .../rxjava2/android/samples/model/Car.java    |   3 +-
 .../rxjava2/android/samples/model/User.java   |   9 +
 .../AsyncSubjectExampleActivity.java          |  39 +++
 .../BehaviorSubjectExampleActivity.java       |  42 ++++
 .../operators/BufferExampleActivity.java      |  57 +++++
 .../CompletableObserverExampleActivity.java   |  47 ++++
 .../operators/ConcatExampleActivity.java      |  36 +++
 .../operators/DebounceExampleActivity.java    |  71 ++++++
 .../operators/DeferExampleActivity.java       |  33 +++
 .../operators/DisposableExampleActivity.java  |  52 ++++
 .../operators/DistinctExampleActivity.java    |  20 ++
 .../operators/FilterExampleActivity.java      |  28 +++
 .../operators/FlowableExampleActivity.java    |  84 +++++++
 .../operators/IntervalExampleActivity.java    |  43 ++++
 .../LastOperatorExampleActivity.java          |  24 ++
 .../samples/operators/MapExampleActivity.java |  56 +++++
 .../operators/MergeExampleActivity.java       |  28 +++
 .../PublishSubjectExampleActivity.java        |  41 ++++
 .../operators/ReduceExampleActivity.java      |  31 +++
 .../operators/ReplayExampleActivity.java      |  45 ++++
 .../ReplaySubjectExampleActivity.java         |  49 ++++
 .../operators/ScanExampleActivity.java        |  35 +++
 .../operators/SimpleExampleActivity.java      |  31 +++
 .../SingleObserverExampleActivity.java        |  51 ++++
 .../operators/SkipExampleActivity.java        |  31 +++
 .../operators/TakeExampleActivity.java        |  32 +++
 .../ThrottleFirstExampleActivity.java         |  58 +++++
 .../ThrottleLastExampleActivity.java          |  62 +++++
 .../operators/TimerExampleActivity.java       |  33 +++
 .../operators/WindowExampleActivity.java      |   1 +
 .../samples/operators/ZipExampleActivity.java |  65 +++++
 .../rxjava2/android/samples/utils/Utils.java  |  13 +
 app/src/main/res/layout/activity_main.xml     |  14 ++
 app/src/main/res/values/strings.xml           |   2 +
 build.gradle                                  |   2 +-
 gradle.properties                             |  19 +-
 69 files changed, 1669 insertions(+), 2804 deletions(-)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/AbsExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/AsyncSubjectExample.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/BehaviorSubjectExample.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/BufferExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/CompletableObserverActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/ConcatExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/DebounceExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/DeferExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/DisposableExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/DistinctExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/FilterExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/FlowableExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/IntervalExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/LastOperatorExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/MapExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/MergeExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/MyApplication.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/PublishSubjectExample.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/ReduceExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/ReplayExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/ReplaySubjectExample.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/ScanExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/SimpleExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/SingleObserverExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/SkipExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/TakeExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/ThrottleLastExampleActivity.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/TimerExample.java
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/ZipExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/AsyncSubjectExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/BehaviorSubjectExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/DebounceExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/DistinctExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/LastOperatorExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/PublishSubjectExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/ReplaySubjectExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/ScanExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/SimpleExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/ThrottleFirstExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/ThrottleLastExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/TimerExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/WindowExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java

diff --git a/app/build.gradle b/app/build.gradle
index 5955173..5dfd943 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.1"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.2"
 
     defaultConfig {
         applicationId "com.rxjava2.android.samples"
-        minSdkVersion 15
-        targetSdkVersion 24
+        minSdkVersion 16
+        targetSdkVersion 25
         versionCode 1
         versionName "1.0"
     }
@@ -19,10 +19,25 @@ android {
     }
 }
 
+//compileOptions {
+//    sourceCompatibility JavaVersion.VERSION_1_8
+//    targetCompatibility JavaVersion.VERSION_1_8
+//}
+
+//packagingOptions {
+//     exclude 'LICENSE'
+//     exclude 'LICENSE.txt'
+//}
+
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
-    compile 'com.android.support:appcompat-v7:24.1.1'
-    compile 'io.reactivex.rxjava2:rxjava:2.0.2'
-    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
+    compile 'com.android.support:appcompat-v7:25.1.0'
+
+     // https://mvnrepository.com/artifact/io.reactivex.rxjava2/rxjava
+    compile group: 'io.reactivex.rxjava2', name: 'rxjava', version: '2.0.4'
+    // https://mvnrepository.com/artifact/io.reactivex.rxjava2/rxandroid
+    compile('io.reactivex.rxjava2:rxandroid:2.0.1'){
+        exclude group: 'io.reactivex.rxjava2', module: 'rxjava'
+    }
 }
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 6f0d4b2..af26764 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -1,8 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.rxjava2.android.samples">
+          package="com.rxjava2.android.samples">
 
     <application
+        android:name=".MyApplication"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
@@ -10,93 +11,96 @@
         android:theme="@style/AppTheme">
         <activity android:name=".MainActivity">
             <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
+                <action android:name="android.intent.action.MAIN"/>
 
-                <category android:name="android.intent.category.LAUNCHER" />
+                <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
-
         <activity
-            android:name=".SimpleExampleActivity"
-            android:label="@string/simple" />
+            android:name=".operators.SimpleExampleActivity"
+            android:label="@string/simple"/>
         <activity
-            android:name=".MapExampleActivity"
-            android:label="@string/map" />
+            android:name=".operators.MapExampleActivity"
+            android:label="@string/map"/>
         <activity
-            android:name=".ZipExampleActivity"
-            android:label="@string/zip" />
+            android:name=".operators.ZipExampleActivity"
+            android:label="@string/zip"/>
         <activity
-            android:name=".DisposableExampleActivity"
-            android:label="@string/disposable" />
+            android:name=".operators.DisposableExampleActivity"
+            android:label="@string/disposable"/>
         <activity
-            android:name=".TakeExampleActivity"
-            android:label="@string/take" />
+            android:name=".operators.TakeExampleActivity"
+            android:label="@string/take"/>
         <activity
-            android:name=".TimerExample"
-            android:label="@string/timer" />
+            android:name=".operators.TimerExampleActivity"
+            android:label="@string/timer"/>
         <activity
-            android:name=".IntervalExampleActivity"
-            android:label="@string/interval" />
+            android:name=".operators.IntervalExampleActivity"
+            android:label="@string/interval"/>
         <activity
-            android:name=".SingleObserverExampleActivity"
-            android:label="@string/SingleObserver" />
+            android:name=".operators.SingleObserverExampleActivity"
+            android:label="@string/SingleObserver"/>
         <activity
-            android:name=".CompletableObserverActivity"
-            android:label="@string/CompletableObserver" />
+            android:name=".operators.CompletableObserverExampleActivity"
+            android:label="@string/CompletableObserver"/>
         <activity
-            android:name=".FlowableExampleActivity"
-            android:label="@string/Flowable" />
+            android:name=".operators.FlowableExampleActivity"
+            android:label="@string/Flowable"/>
         <activity
-            android:name=".ReduceExampleActivity"
-            android:label="@string/reduce" />
+            android:name=".operators.ReduceExampleActivity"
+            android:label="@string/reduce"/>
         <activity
-            android:name=".BufferExampleActivity"
-            android:label="@string/buffer" />
+            android:name=".operators.BufferExampleActivity"
+            android:label="@string/buffer"/>
         <activity
-            android:name=".FilterExampleActivity"
-            android:label="@string/filter" />
+            android:name=".operators.FilterExampleActivity"
+            android:label="@string/filter"/>
         <activity
-            android:name=".SkipExampleActivity"
-            android:label="@string/skip" />
+            android:name=".operators.SkipExampleActivity"
+            android:label="@string/skip"/>
         <activity
-            android:name=".ScanExampleActivity"
-            android:label="@string/scan" />
+            android:name=".operators.ScanExampleActivity"
+            android:label="@string/scan"/>
         <activity
-            android:name=".ReplayExampleActivity"
-            android:label="@string/replay" />
+            android:name=".operators.ReplayExampleActivity"
+            android:label="@string/replay"/>
         <activity
-            android:name=".ConcatExampleActivity"
-            android:label="@string/concat" />
+            android:name=".operators.ConcatExampleActivity"
+            android:label="@string/concat"/>
         <activity
-            android:name=".MergeExampleActivity"
-            android:label="@string/merge" />
+            android:name=".operators.MergeExampleActivity"
+            android:label="@string/merge"/>
         <activity
-            android:name=".DeferExampleActivity"
-            android:label="@string/defer" />
+            android:name=".operators.DeferExampleActivity"
+            android:label="@string/defer"/>
         <activity
-            android:name=".DistinctExampleActivity"
-            android:label="@string/distinct" />
+            android:name=".operators.DistinctExampleActivity"
+            android:label="@string/distinct"/>
         <activity
-            android:name=".LastOperatorExampleActivity"
-            android:label="@string/distinct" />
+            android:name=".operators.LastOperatorExampleActivity"
+            android:label="@string/distinct"/>
         <activity
-            android:name=".ReplaySubjectExample"
-            android:label="@string/replay_subject" />
+            android:name=".operators.ReplaySubjectExampleActivity"
+            android:label="@string/replay_subject"/>
         <activity
-            android:name=".PublishSubjectExample"
-            android:label="@string/publish_subject" />
+            android:name=".operators.PublishSubjectExampleActivity"
+            android:label="@string/publish_subject"/>
         <activity
-            android:name=".BehaviorSubjectExample"
-            android:label="@string/behavior_subject" />
+            android:name=".operators.BehaviorSubjectExampleActivity"
+            android:label="@string/behavior_subject"/>
         <activity
-            android:name=".AsyncSubjectExample"
-            android:label="@string/async_subject" />
+            android:name=".operators.AsyncSubjectExampleActivity"
+            android:label="@string/async_subject"/>
         <activity
-            android:name=".ThrottleLastExampleActivity"
-            android:label="@string/throttle_last" />
+            android:name=".operators.ThrottleLastExampleActivity"
+            android:label="@string/throttle_last"/>
         <activity
-            android:name=".DebounceExampleActivity"
-            android:label="@string/debounce" />
+            android:name=".operators.DebounceExampleActivity"
+            android:label="@string/debounce"/>
+        <activity android:name=".operators.WindowExampleActivity"
+            android:label="@string/window"/>
+        <activity android:name=".operators.ThrottleFirstExampleActivity"
+                  android:label="@string/throttle_first"/>
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/AbsExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/AbsExampleActivity.java
new file mode 100644
index 0000000..d0704d9
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/AbsExampleActivity.java
@@ -0,0 +1,225 @@
+package com.rxjava2.android.samples;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import java.util.List;
+
+import io.reactivex.CompletableObserver;
+import io.reactivex.MaybeObserver;
+import io.reactivex.Observer;
+import io.reactivex.SingleObserver;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.observers.DisposableObserver;
+
+/**
+ * Created by threshold on 2017/1/11.
+ */
+
+public abstract class AbsExampleActivity extends AppCompatActivity {
+
+    protected String TAG = getClass().getSimpleName();
+    protected Button btn;
+    protected TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /**
+     * Do some work when click the button.
+     */
+    protected abstract void doSomeWork() ;
+
+    protected <T> Observer<T> getObserver() {
+        return getObserver("");
+    }
+
+    protected <T> Observer<T> getObserver(final Object theNumberOfObserver) {
+        return new Observer<T>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                AbsExampleActivity.this.onSubscribe(theNumberOfObserver,d);
+            }
+
+            @Override
+            public void onNext(T value) {
+                AbsExampleActivity.this.onNext(theNumberOfObserver,value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                AbsExampleActivity.this.onError(theNumberOfObserver,e);
+            }
+
+            @Override
+            public void onComplete() {
+                AbsExampleActivity.this.onComplete(theNumberOfObserver);
+            }
+        };
+    }
+
+    protected CompletableObserver getCompletableObserver() {
+        return getCompletableObserver("");
+    }
+
+    protected CompletableObserver getCompletableObserver(final Object theNumberOfObserver) {
+        return new CompletableObserver() {
+            @Override
+            public void onSubscribe(Disposable d) {
+                AbsExampleActivity.this.onSubscribe(theNumberOfObserver, d);
+            }
+
+            @Override
+            public void onComplete() {
+                AbsExampleActivity.this.onComplete(theNumberOfObserver);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                AbsExampleActivity.this.onError(theNumberOfObserver, e);
+            }
+        };
+    }
+
+    protected <T> DisposableObserver<T> getDisposableObserver() {
+        return getDisposableObserver("");
+    }
+
+    protected <T> DisposableObserver<T> getDisposableObserver(final Object theNumberOfObserver) {
+        return new DisposableObserver<T>() {
+            @Override
+            public void onNext(T t) {
+                AbsExampleActivity.this.onNext(theNumberOfObserver, t);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                AbsExampleActivity.this.onError(theNumberOfObserver, e);
+            }
+
+            @Override
+            public void onComplete() {
+                AbsExampleActivity.this.onComplete(theNumberOfObserver);
+            }
+        };
+    }
+
+    protected <T> SingleObserver<T> getSingleObserver() {
+        return getSingleObserver("");
+    }
+
+    protected <T> SingleObserver<T> getSingleObserver(final Object theNumberOfObserver) {
+        return new SingleObserver<T>() {
+            @Override
+            public void onSubscribe(Disposable d) {
+                AbsExampleActivity.this.onSubscribe(theNumberOfObserver, d);
+            }
+
+            @Override
+            public void onSuccess(T t) {
+                AbsExampleActivity.this.onNext(theNumberOfObserver, t);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                AbsExampleActivity.this.onError(theNumberOfObserver, e);
+            }
+        };
+    }
+
+    protected <T> MaybeObserver<T> getMaybeObserver() {
+        return getMaybeObserver("");
+    }
+
+    protected <T> MaybeObserver<T> getMaybeObserver(final Object theNumberOfObserver) {
+        return new MaybeObserver<T>() {
+            @Override
+            public void onSubscribe(Disposable d) {
+                AbsExampleActivity.this.onSubscribe(theNumberOfObserver, d);
+            }
+
+            @Override
+            public void onSuccess(T t) {
+                AbsExampleActivity.this.onSuccess(theNumberOfObserver, t);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                AbsExampleActivity.this.onError(theNumberOfObserver, e);
+            }
+
+            @Override
+            public void onComplete() {
+                AbsExampleActivity.this.onComplete(theNumberOfObserver);
+            }
+        };
+    }
+
+    protected void onSubscribe(Object theNumberOfObserver,Disposable d) {
+        String msg = theNumberOfObserver + "  onSubscribe";
+        if (d != null) {
+            msg = msg + ": isDisposed :" + d.isDisposed();
+        }
+        Log.d(TAG, msg);
+        textView.append(msg);
+        textView.append(AppConstant.LINE_SEPARATOR);
+    }
+
+    protected <T> void onNext(Object theNumberOfObserver,T value) {
+        onPositive(theNumberOfObserver,"onNext",value);
+    }
+
+    protected <T> void onSuccess(Object theNumberOfObserver, T value) {
+        onPositive(theNumberOfObserver,"onSuccess",value);
+    }
+
+    private <T> void onPositive(Object theNumberOfObserver,String positiveKey,T value) {
+        if (value instanceof List) {
+            List valueList = (List) value;
+            Log.d(TAG, theNumberOfObserver+" "+positiveKey+"  size :" + valueList.size());
+            textView.append( theNumberOfObserver+" "+positiveKey+"  size :" + valueList.size());
+            textView.append(AppConstant.LINE_SEPARATOR);
+            for (Object obj : valueList) {
+                Log.d(TAG, " : value : " + obj.toString());
+                textView.append(" value : " + obj.toString());
+                textView.append(AppConstant.LINE_SEPARATOR);
+            }
+        } else {
+            Log.d(TAG, theNumberOfObserver+" "+positiveKey+"  value : " + value);
+            textView.append(theNumberOfObserver+" "+positiveKey+" : value : " + value);
+            textView.append(AppConstant.LINE_SEPARATOR);
+        }
+    }
+
+    protected  void onError(Object theNumberOfObserver,Throwable e) {
+        textView.append(theNumberOfObserver+"  onError : " + e.getMessage());
+        textView.append(AppConstant.LINE_SEPARATOR);
+        Log.e(TAG, theNumberOfObserver+"  onError : " , e);
+    }
+
+    public void onComplete(Object theNumberOfObserver) {
+        textView.append(theNumberOfObserver+"  onComplete");
+        textView.append(AppConstant.LINE_SEPARATOR);
+        Log.d(TAG, theNumberOfObserver+"  onComplete");
+    }
+
+
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/AsyncSubjectExample.java b/app/src/main/java/com/rxjava2/android/samples/AsyncSubjectExample.java
deleted file mode 100644
index 0b15b73..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/AsyncSubjectExample.java
+++ /dev/null
@@ -1,131 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.subjects.AsyncSubject;
-
-/**
- * Created by amitshekhar on 17/12/16.
- */
-
-public class AsyncSubjectExample extends AppCompatActivity {
-
-    private static final String TAG = AsyncSubjectExample.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /* An AsyncSubject emits the last value (and only the last value) emitted by the source
-     * Observable, and only after that source Observable completes. (If the source Observable
-     * does not emit any values, the AsyncSubject also completes without emitting any values.)
-     */
-    private void doSomeWork() {
-
-        AsyncSubject<Integer> source = AsyncSubject.create();
-
-        source.subscribe(getFirstObserver()); // it will emit only 4 and onComplete
-
-        source.onNext(1);
-        source.onNext(2);
-        source.onNext(3);
-
-        /*
-         * it will emit 4 and onComplete for second observer also.
-         */
-        source.subscribe(getSecondObserver());
-
-        source.onNext(4);
-        source.onComplete();
-
-    }
-
-
-    private Observer<Integer> getFirstObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" First onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" First onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" First onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onComplete");
-            }
-        };
-    }
-
-    private Observer<Integer> getSecondObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
-                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
-                textView.append(AppConstant.LINE_SEPARATOR);
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" Second onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" Second onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" Second onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/BehaviorSubjectExample.java b/app/src/main/java/com/rxjava2/android/samples/BehaviorSubjectExample.java
deleted file mode 100644
index 8644d2f..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/BehaviorSubjectExample.java
+++ /dev/null
@@ -1,131 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.subjects.BehaviorSubject;
-
-/**
- * Created by amitshekhar on 17/12/16.
- */
-
-public class BehaviorSubjectExample extends AppCompatActivity {
-
-    private static final String TAG = BehaviorSubjectExample.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /* When an observer subscribes to a BehaviorSubject, it begins by emitting the item most
-     * recently emitted by the source Observable (or a seed/default value if none has yet been
-     * emitted) and then continues to emit any other items emitted later by the source Observable(s).
-     */
-    private void doSomeWork() {
-
-        BehaviorSubject<Integer> source = BehaviorSubject.create();
-
-        source.subscribe(getFirstObserver()); // it will get 1, 2, 3, 4 and onComplete
-
-        source.onNext(1);
-        source.onNext(2);
-        source.onNext(3);
-
-        /*
-         * it will emit 3(last emitted), 4 and onComplete for second observer also.
-         */
-        source.subscribe(getSecondObserver());
-
-        source.onNext(4);
-        source.onComplete();
-
-    }
-
-
-    private Observer<Integer> getFirstObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" First onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" First onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" First onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onComplete");
-            }
-        };
-    }
-
-    private Observer<Integer> getSecondObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
-                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
-                textView.append(AppConstant.LINE_SEPARATOR);
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" Second onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" Second onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" Second onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/BufferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/BufferExampleActivity.java
deleted file mode 100644
index 8e2c9a7..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/BufferExampleActivity.java
+++ /dev/null
@@ -1,103 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import java.util.List;
-
-import io.reactivex.Observable;
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class BufferExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = BufferExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-     * simple example using buffer operator - bundles all emitted values into a list
-     */
-    private void doSomeWork() {
-
-        Observable<List<String>> buffered = getObservable().buffer(3, 1);
-
-        // 3 means,  it takes max of three from its start index and create list
-        // 1 means, it jumps one step every time
-        // so the it gives the following list
-        // 1 - one, two, three
-        // 2 - two, three, four
-        // 3 - three, four, five
-        // 4 - four, five
-        // 5 - five
-
-        buffered.subscribe(getObserver());
-    }
-
-    private Observable<String> getObservable() {
-        return Observable.just("one", "two", "three", "four", "five");
-    }
-
-    private Observer<List<String>> getObserver() {
-        return new Observer<List<String>>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(List<String> stringList) {
-                textView.append(" onNext size : " + stringList.size());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext : size :" + stringList.size());
-                for (String value : stringList) {
-                    textView.append(" value : " + value);
-                    textView.append(AppConstant.LINE_SEPARATOR);
-                    Log.d(TAG, " : value :" + value);
-                }
-
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/CompletableObserverActivity.java b/app/src/main/java/com/rxjava2/android/samples/CompletableObserverActivity.java
deleted file mode 100644
index b825a7b..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/CompletableObserverActivity.java
+++ /dev/null
@@ -1,80 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import java.util.concurrent.TimeUnit;
-
-import io.reactivex.Completable;
-import io.reactivex.CompletableObserver;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class CompletableObserverActivity extends AppCompatActivity {
-
-    private static final String TAG = CompletableObserverActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-     * simple example using CompletableObserver
-     */
-    private void doSomeWork() {
-        Completable completable = Completable.timer(1000, TimeUnit.MILLISECONDS);
-
-        completable
-                .subscribeOn(Schedulers.io())
-                // Be notified on the main thread
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(getCompletableObserver());
-    }
-
-    private CompletableObserver getCompletableObserver() {
-        return new CompletableObserver() {
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-        };
-    }
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ConcatExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ConcatExampleActivity.java
deleted file mode 100644
index 1af58c5..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/ConcatExampleActivity.java
+++ /dev/null
@@ -1,92 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observable;
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class ConcatExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = ConcatExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-     * Using concat operator to combine Observable : concat maintain
-     * the order of Observable.
-     * It will emit all the 7 values in order
-     * here - first "A1", "A2", "A3", "A4" and then "B1", "B2", "B3"
-     * first all from the first Observable and then
-     * all from the second Observable all in order
-     */
-    private void doSomeWork() {
-        final String[] aStrings = {"A1", "A2", "A3", "A4"};
-        final String[] bStrings = {"B1", "B2", "B3"};
-
-        final Observable<String> aObservable = Observable.fromArray(aStrings);
-        final Observable<String> bObservable = Observable.fromArray(bStrings);
-
-        Observable.concat(aObservable, bObservable)
-                .subscribe(getObserver());
-    }
-
-
-    private Observer<String> getObserver() {
-        return new Observer<String>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(String value) {
-                textView.append(" onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext : value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/DebounceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/DebounceExampleActivity.java
deleted file mode 100644
index 411d028..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/DebounceExampleActivity.java
+++ /dev/null
@@ -1,115 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import java.util.concurrent.TimeUnit;
-
-import io.reactivex.Observable;
-import io.reactivex.ObservableEmitter;
-import io.reactivex.ObservableOnSubscribe;
-import io.reactivex.Observer;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
-
-/**
- * Created by amitshekhar on 22/12/16.
- */
-
-public class DebounceExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = DebounceExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-    * Using debounce() -> only emit an item from an Observable if a particular time-span has
-    * passed without it emitting another item, so it will emit 2, 4, 5 as we have simulated it.
-    */
-    private void doSomeWork() {
-        getObservable()
-                .debounce(500, TimeUnit.MILLISECONDS)
-                // Run on a background thread
-                .subscribeOn(Schedulers.io())
-                // Be notified on the main thread
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(getObserver());
-    }
-
-    private Observable<Integer> getObservable() {
-        return Observable.create(new ObservableOnSubscribe<Integer>() {
-            @Override
-            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
-                // send events with simulated time wait
-                emitter.onNext(1); // skip
-                Thread.sleep(400);
-                emitter.onNext(2); // deliver
-                Thread.sleep(505);
-                emitter.onNext(3); // skip
-                Thread.sleep(100);
-                emitter.onNext(4); // deliver
-                Thread.sleep(605);
-                emitter.onNext(5); // deliver
-                Thread.sleep(510);
-                emitter.onComplete();
-            }
-        });
-    }
-
-    private Observer<Integer> getObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" onNext : ");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                textView.append(" value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext ");
-                Log.d(TAG, " value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/DeferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/DeferExampleActivity.java
deleted file mode 100644
index 6c0937b..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/DeferExampleActivity.java
+++ /dev/null
@@ -1,90 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.model.Car;
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observable;
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
-
-/**
- * Created by amitshekhar on 30/08/16.
- */
-public class DeferExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = DeferExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-     * Defer used for Deferring Observable code until subscription in RxJava
-     */
-    private void doSomeWork() {
-
-        Car car = new Car();
-
-        Observable<String> brandDeferObservable = car.brandDeferObservable();
-
-        car.setBrand("BMW");  // Even if we are setting the brand after creating Observable
-                              // we will get the brand as BMW.
-                              // If we had not used defer, we would have got null as the brand.
-
-        brandDeferObservable
-                .subscribe(getObserver());
-    }
-
-    private Observer<String> getObserver() {
-        return new Observer<String>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(String value) {
-                textView.append(" onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext : value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/DisposableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/DisposableExampleActivity.java
deleted file mode 100644
index b581d54..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/DisposableExampleActivity.java
+++ /dev/null
@@ -1,98 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.os.SystemClock;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import java.util.concurrent.Callable;
-
-import io.reactivex.Observable;
-import io.reactivex.ObservableSource;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.observers.DisposableObserver;
-import io.reactivex.schedulers.Schedulers;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class DisposableExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = DisposableExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-    private final CompositeDisposable disposables = new CompositeDisposable();
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    @Override
-    protected void onDestroy() {
-        super.onDestroy();
-        disposables.clear(); // do not send event after activity has been destroyed
-    }
-
-    /*
-     * Example to understand how to use disposables.
-     * disposables is cleared in onDestroy of this activity.
-     */
-    void doSomeWork() {
-        disposables.add(sampleObservable()
-                // Run on a background thread
-                .subscribeOn(Schedulers.io())
-                // Be notified on the main thread
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribeWith(new DisposableObserver<String>() {
-                    @Override
-                    public void onComplete() {
-                        textView.append(" onComplete");
-                        textView.append(AppConstant.LINE_SEPARATOR);
-                        Log.d(TAG, " onComplete");
-                    }
-
-                    @Override
-                    public void onError(Throwable e) {
-                        textView.append(" onError : " + e.getMessage());
-                        textView.append(AppConstant.LINE_SEPARATOR);
-                        Log.d(TAG, " onError : " + e.getMessage());
-                    }
-
-                    @Override
-                    public void onNext(String value) {
-                        textView.append(" onNext : value : " + value);
-                        textView.append(AppConstant.LINE_SEPARATOR);
-                        Log.d(TAG, " onNext value : " + value);
-                    }
-                }));
-    }
-
-    static Observable<String> sampleObservable() {
-        return Observable.defer(new Callable<ObservableSource<? extends String>>() {
-            @Override
-            public ObservableSource<? extends String> call() throws Exception {
-                // Do some long running operation
-                SystemClock.sleep(2000);
-                return Observable.just("one", "two", "three", "four", "five");
-            }
-        });
-    }
-}
-
diff --git a/app/src/main/java/com/rxjava2/android/samples/DistinctExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/DistinctExampleActivity.java
deleted file mode 100644
index dc8f5e2..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/DistinctExampleActivity.java
+++ /dev/null
@@ -1,75 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.annotation.Nullable;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-import com.rxjava2.android.samples.utils.AppConstant;
-import io.reactivex.Observable;
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
-
-/**
- * Created by techteam on 13/09/16.
- */
-public class DistinctExampleActivity extends AppCompatActivity {
-
-  private static final String TAG = DistinctExampleActivity.class.getSimpleName();
-  Button btn;
-  TextView textView;
-
-  @Override protected void onCreate(@Nullable Bundle savedInstanceState) {
-    super.onCreate(savedInstanceState);
-    setContentView(R.layout.activity_example);
-    btn = (Button) findViewById(R.id.btn);
-    textView = (TextView) findViewById(R.id.textView);
-
-    btn.setOnClickListener(new View.OnClickListener() {
-      @Override
-      public void onClick(View view) {
-        doSomeWork();
-      }
-    });
-  }
-
-
-  private void doSomeWork(){
-
-     getObservable().distinct() .subscribe(getObserver());
-  }
-
-  private Observable<Integer> getObservable() {
-    return Observable.just(1, 2, 1, 1, 2, 3, 4 ,6, 4);
-  }
-
-
-  private Observer<Integer> getObserver() {
-    return new Observer<Integer>() {
-
-      @Override
-      public void onSubscribe(Disposable d) {
-        Log.d(TAG, " onSubscribe : " + d.isDisposed());
-      }
-
-      @Override
-      public void onNext(Integer value) {
-        textView.append(" onNext : value : " + value);
-        textView.append(AppConstant.LINE_SEPARATOR);
-        Log.d(TAG, " onNext value : " + value);
-      }
-
-      @Override
-      public void onError(Throwable e) {
-        Log.d(TAG, " onError : " + e.getMessage());
-      }
-
-      @Override
-      public void onComplete() {
-        Log.d(TAG, " onComplete");
-      }
-    };
-  }
-}
diff --git a/app/src/main/java/com/rxjava2/android/samples/FilterExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/FilterExampleActivity.java
deleted file mode 100644
index 0638d8f..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/FilterExampleActivity.java
+++ /dev/null
@@ -1,92 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observable;
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.functions.Predicate;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class FilterExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = FilterExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-     * simple example by using filter operator to emit only even value
-     *
-     */
-    private void doSomeWork() {
-        Observable.just(1, 2, 3, 4, 5, 6)
-                .filter(new Predicate<Integer>() {
-                    @Override
-                    public boolean test(Integer integer) throws Exception {
-                        return integer % 2 == 0;
-                    }
-                })
-                .subscribe(getObserver());
-    }
-
-
-    private Observer<Integer> getObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" onNext : ");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                textView.append(" value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext ");
-                Log.d(TAG, " value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/FlowableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/FlowableExampleActivity.java
deleted file mode 100644
index cbead49..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/FlowableExampleActivity.java
+++ /dev/null
@@ -1,80 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Flowable;
-import io.reactivex.SingleObserver;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.functions.BiFunction;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class FlowableExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = FlowableExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-     * simple example using Flowable
-     */
-    private void doSomeWork() {
-
-        Flowable<Integer> observable = Flowable.just(1, 2, 3, 4);
-
-        observable.reduce(50, new BiFunction<Integer, Integer, Integer>() {
-            @Override
-            public Integer apply(Integer t1, Integer t2) {
-                return t1 + t2;
-            }
-        }).subscribe(getObserver());
-
-    }
-
-    private SingleObserver<Integer> getObserver() {
-
-        return new SingleObserver<Integer>() {
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onSuccess(Integer value) {
-                textView.append(" onSuccess : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onSuccess : value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-        };
-    }
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/IntervalExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/IntervalExampleActivity.java
deleted file mode 100644
index afaf822..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/IntervalExampleActivity.java
+++ /dev/null
@@ -1,95 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import java.util.concurrent.TimeUnit;
-
-import io.reactivex.Observable;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.observers.DisposableObserver;
-import io.reactivex.schedulers.Schedulers;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class IntervalExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = IntervalExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-    private final CompositeDisposable disposables = new CompositeDisposable();
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    @Override
-    protected void onDestroy() {
-        super.onDestroy();
-        disposables.clear(); // clearing it : do not emit after destroy
-    }
-
-    /*
-     * simple example using interval to run task at an interval of 2 sec
-     * which start immediately
-     */
-    private void doSomeWork() {
-        disposables.add(getObservable()
-                // Run on a background thread
-                .subscribeOn(Schedulers.io())
-                // Be notified on the main thread
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribeWith(getObserver()));
-    }
-
-    private Observable<? extends Long> getObservable() {
-        return Observable.interval(0, 2, TimeUnit.SECONDS);
-    }
-
-    private DisposableObserver<Long> getObserver() {
-        return new DisposableObserver<Long>() {
-
-            @Override
-            public void onNext(Long value) {
-                textView.append(" onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext : value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/LastOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/LastOperatorExampleActivity.java
deleted file mode 100644
index d17a22b..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/LastOperatorExampleActivity.java
+++ /dev/null
@@ -1,75 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.annotation.Nullable;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observable;
-import io.reactivex.SingleObserver;
-import io.reactivex.disposables.Disposable;
-
-/**
- * Created by techteam on 13/09/16.
- */
-public class LastOperatorExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = DistinctExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-
-    @Override
-    protected void onCreate(@Nullable Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    private void doSomeWork() {
-        getObservable().last("A1") // the default item ("A1") to emit if the source ObservableSource is empty
-                .subscribe(getObserver());
-    }
-
-    private Observable<String> getObservable() {
-        return Observable.just("A1", "A2", "A3", "A4", "A5", "A6");
-    }
-
-    private SingleObserver<String> getObserver() {
-        return new SingleObserver<String>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onSuccess(String value) {
-                textView.append(" onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext value : " + value);
-            }
-
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-        };
-    }
-}
diff --git a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
index 9080a31..50ba052 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
@@ -5,6 +5,36 @@
 import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 
+import com.rxjava2.android.samples.operators.AsyncSubjectExampleActivity;
+import com.rxjava2.android.samples.operators.BehaviorSubjectExampleActivity;
+import com.rxjava2.android.samples.operators.BufferExampleActivity;
+import com.rxjava2.android.samples.operators.CompletableObserverExampleActivity;
+import com.rxjava2.android.samples.operators.ConcatExampleActivity;
+import com.rxjava2.android.samples.operators.DebounceExampleActivity;
+import com.rxjava2.android.samples.operators.DeferExampleActivity;
+import com.rxjava2.android.samples.operators.DisposableExampleActivity;
+import com.rxjava2.android.samples.operators.DistinctExampleActivity;
+import com.rxjava2.android.samples.operators.FilterExampleActivity;
+import com.rxjava2.android.samples.operators.FlowableExampleActivity;
+import com.rxjava2.android.samples.operators.IntervalExampleActivity;
+import com.rxjava2.android.samples.operators.LastOperatorExampleActivity;
+import com.rxjava2.android.samples.operators.MapExampleActivity;
+import com.rxjava2.android.samples.operators.MergeExampleActivity;
+import com.rxjava2.android.samples.operators.PublishSubjectExampleActivity;
+import com.rxjava2.android.samples.operators.ReduceExampleActivity;
+import com.rxjava2.android.samples.operators.ReplayExampleActivity;
+import com.rxjava2.android.samples.operators.ReplaySubjectExampleActivity;
+import com.rxjava2.android.samples.operators.ScanExampleActivity;
+import com.rxjava2.android.samples.operators.SimpleExampleActivity;
+import com.rxjava2.android.samples.operators.SingleObserverExampleActivity;
+import com.rxjava2.android.samples.operators.SkipExampleActivity;
+import com.rxjava2.android.samples.operators.TakeExampleActivity;
+import com.rxjava2.android.samples.operators.ThrottleFirstExampleActivity;
+import com.rxjava2.android.samples.operators.ThrottleLastExampleActivity;
+import com.rxjava2.android.samples.operators.TimerExampleActivity;
+import com.rxjava2.android.samples.operators.WindowExampleActivity;
+import com.rxjava2.android.samples.operators.ZipExampleActivity;
+
 public class MainActivity extends AppCompatActivity {
 
     @Override
@@ -34,7 +64,7 @@ public void startTakeActivity(View view) {
     }
 
     public void startTimerActivity(View view) {
-        startActivity(new Intent(MainActivity.this, TimerExample.class));
+        startActivity(new Intent(MainActivity.this, TimerExampleActivity.class));
     }
 
     public void startIntervalActivity(View view) {
@@ -46,7 +76,7 @@ public void startSingleObserverActivity(View view) {
     }
 
     public void startCompletableObserverActivity(View view) {
-        startActivity(new Intent(MainActivity.this, CompletableObserverActivity.class));
+        startActivity(new Intent(MainActivity.this, CompletableObserverExampleActivity.class));
     }
 
     public void startFlowableActivity(View view) {
@@ -98,19 +128,23 @@ public void startLastOperatorActivity(View view) {
     }
 
     public void startReplaySubjectActivity(View view) {
-        startActivity(new Intent(MainActivity.this, ReplaySubjectExample.class));
+        startActivity(new Intent(MainActivity.this, ReplaySubjectExampleActivity.class));
     }
 
     public void startPublishSubjectActivity(View view) {
-        startActivity(new Intent(MainActivity.this, PublishSubjectExample.class));
+        startActivity(new Intent(MainActivity.this, PublishSubjectExampleActivity.class));
     }
 
     public void startBehaviorSubjectActivity(View view) {
-        startActivity(new Intent(MainActivity.this, BehaviorSubjectExample.class));
+        startActivity(new Intent(MainActivity.this, BehaviorSubjectExampleActivity.class));
     }
 
     public void startAsyncSubjectActivity(View view) {
-        startActivity(new Intent(MainActivity.this, AsyncSubjectExample.class));
+        startActivity(new Intent(MainActivity.this, AsyncSubjectExampleActivity.class));
+    }
+
+    public void startThrottleFirstActivity(View view) {
+        startActivity(new Intent(MainActivity.this,ThrottleFirstExampleActivity.class));
     }
 
     public void startThrottleLastActivity(View view) {
@@ -120,4 +154,10 @@ public void startThrottleLastActivity(View view) {
     public void startDebounceActivity(View view) {
         startActivity(new Intent(MainActivity.this, DebounceExampleActivity.class));
     }
+
+    public void startWindowActivity(View view) {
+        startActivity(new Intent(MainActivity.this,WindowExampleActivity.class));
+    }
+
+
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/MapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/MapExampleActivity.java
deleted file mode 100644
index 6ddd151..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/MapExampleActivity.java
+++ /dev/null
@@ -1,120 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.model.ApiUser;
-import com.rxjava2.android.samples.model.User;
-import com.rxjava2.android.samples.utils.AppConstant;
-import com.rxjava2.android.samples.utils.Utils;
-
-import java.util.List;
-
-import io.reactivex.Observable;
-import io.reactivex.ObservableEmitter;
-import io.reactivex.ObservableOnSubscribe;
-import io.reactivex.Observer;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.functions.Function;
-import io.reactivex.schedulers.Schedulers;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class MapExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = MapExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-    * Here we are getting ApiUser Object from api server
-    * then we are converting it into User Object because
-    * may be our database support User Not ApiUser Object
-    * Here we are using Map Operator to do that
-    */
-    private void doSomeWork() {
-        getObservable()
-                // Run on a background thread
-                .subscribeOn(Schedulers.io())
-                // Be notified on the main thread
-                .observeOn(AndroidSchedulers.mainThread())
-                .map(new Function<List<ApiUser>, List<User>>() {
-
-                    @Override
-                    public List<User> apply(List<ApiUser> apiUsers) throws Exception {
-                        return Utils.convertApiUserListToUserList(apiUsers);
-                    }
-                })
-                .subscribe(getObserver());
-    }
-
-    private Observable<List<ApiUser>> getObservable() {
-        return Observable.create(new ObservableOnSubscribe<List<ApiUser>>() {
-            @Override
-            public void subscribe(ObservableEmitter<List<ApiUser>> e) throws Exception {
-                if (!e.isDisposed()) {
-                    e.onNext(Utils.getApiUserList());
-                    e.onComplete();
-                }
-            }
-        });
-    }
-
-    private Observer<List<User>> getObserver() {
-        return new Observer<List<User>>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(List<User> userList) {
-                textView.append(" onNext");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                for (User user : userList) {
-                    textView.append(" firstName : " + user.firstName);
-                    textView.append(AppConstant.LINE_SEPARATOR);
-                }
-                Log.d(TAG, " onNext : " + userList.size());
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/MergeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/MergeExampleActivity.java
deleted file mode 100644
index d8ae8c0..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/MergeExampleActivity.java
+++ /dev/null
@@ -1,90 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observable;
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
-
-/**
- * Created by amitshekhar on 28/08/16.
- */
-public class MergeExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = MergeExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-     * Using merge operator to combine Observable : merge does not maintain
-     * the order of Observable.
-     * It will emit all the 7 values may not be in order
-     * Ex - "A1", "B1", "A2", "A3", "A4", "B2", "B3" - may be anything
-     */
-    private void doSomeWork() {
-        final String[] aStrings = {"A1", "A2", "A3", "A4"};
-        final String[] bStrings = {"B1", "B2", "B3"};
-
-        final Observable<String> aObservable = Observable.fromArray(aStrings);
-        final Observable<String> bObservable = Observable.fromArray(bStrings);
-
-        Observable.merge(aObservable, bObservable)
-                .subscribe(getObserver());
-    }
-
-
-    private Observer<String> getObserver() {
-        return new Observer<String>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(String value) {
-                textView.append(" onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext : value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/MyApplication.java b/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
new file mode 100644
index 0000000..c2aac36
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
@@ -0,0 +1,30 @@
+package com.rxjava2.android.samples;
+
+import android.app.Application;
+import android.os.Build;
+import android.util.Log;
+
+import io.reactivex.Observable;
+import io.reactivex.functions.Consumer;
+
+/**
+ * Created by threshold on 2017/1/12.
+ */
+
+public class MyApplication extends Application {
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            Log.d("MyApplication","isArm64:" + (Build.SUPPORTED_64_BIT_ABIS.length > 0));
+            Observable.fromArray(Build.SUPPORTED_64_BIT_ABIS)
+                    .forEach(new Consumer<String>() {
+                        @Override
+                        public void accept(String s) throws Exception {
+                            Log.d("MyApplication", s);
+                        }
+                    });
+        }
+    }
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/PublishSubjectExample.java b/app/src/main/java/com/rxjava2/android/samples/PublishSubjectExample.java
deleted file mode 100644
index 2e4b40c..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/PublishSubjectExample.java
+++ /dev/null
@@ -1,130 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.subjects.PublishSubject;
-
-/**
- * Created by amitshekhar on 17/12/16.
- */
-
-public class PublishSubjectExample extends AppCompatActivity {
-
-    private static final String TAG = PublishSubjectExample.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /* PublishSubject emits to an observer only those items that are emitted
-     * by the source Observable, subsequent to the time of the subscription.
-     */
-    private void doSomeWork() {
-
-        PublishSubject<Integer> source = PublishSubject.create();
-
-        source.subscribe(getFirstObserver()); // it will get 1, 2, 3, 4 and onComplete
-
-        source.onNext(1);
-        source.onNext(2);
-        source.onNext(3);
-
-        /*
-         * it will emit 4 and onComplete for second observer also.
-         */
-        source.subscribe(getSecondObserver());
-
-        source.onNext(4);
-        source.onComplete();
-
-    }
-
-
-    private Observer<Integer> getFirstObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" First onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" First onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" First onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onComplete");
-            }
-        };
-    }
-
-    private Observer<Integer> getSecondObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
-                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
-                textView.append(AppConstant.LINE_SEPARATOR);
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" Second onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" Second onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" Second onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ReduceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ReduceExampleActivity.java
deleted file mode 100644
index 68fbfd6..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/ReduceExampleActivity.java
+++ /dev/null
@@ -1,90 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.MaybeObserver;
-import io.reactivex.Observable;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.functions.BiFunction;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class ReduceExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = ReduceExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-     * simple example using reduce to add all the number
-     */
-    private void doSomeWork() {
-        getObservable()
-                .reduce(new BiFunction<Integer, Integer, Integer>() {
-                    @Override
-                    public Integer apply(Integer t1, Integer t2) {
-                        return t1 + t2;
-                    }
-                })
-                .subscribe(getObserver());
-    }
-
-    private Observable<Integer> getObservable() {
-        return Observable.just(1, 2, 3, 4);
-    }
-
-    private MaybeObserver<Integer> getObserver() {
-        return new MaybeObserver<Integer>() {
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onSuccess(Integer value) {
-                textView.append(" onSuccess : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onSuccess : value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ReplayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ReplayExampleActivity.java
deleted file mode 100644
index 4ce591a..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/ReplayExampleActivity.java
+++ /dev/null
@@ -1,129 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.observables.ConnectableObservable;
-import io.reactivex.subjects.PublishSubject;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class ReplayExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = ReplayExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /* Using replay operator, replay ensure that all observers see the same sequence
-     * of emitted items, even if they subscribe after the Observable has begun emitting items
-     */
-    private void doSomeWork() {
-
-        PublishSubject<Integer> source = PublishSubject.create();
-        ConnectableObservable<Integer> connectableObservable = source.replay(3); // bufferSize = 3 to retain 3 values to replay
-        connectableObservable.connect(); // connecting the connectableObservable
-
-        connectableObservable.subscribe(getFirstObserver());
-
-        source.onNext(1);
-        source.onNext(2);
-        source.onNext(3);
-        source.onNext(4);
-        source.onComplete();
-
-        /*
-         * it will emit 2, 3, 4 as (count = 3), retains the 3 values for replay
-         */
-        connectableObservable.subscribe(getSecondObserver());
-
-    }
-
-
-    private Observer<Integer> getFirstObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" First onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" First onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" First onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onComplete");
-            }
-        };
-    }
-
-    private Observer<Integer> getSecondObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
-                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
-                textView.append(AppConstant.LINE_SEPARATOR);
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" Second onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" Second onError : " + e.getMessage());
-                Log.d(TAG, " Second onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" Second onComplete");
-                Log.d(TAG, " Second onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ReplaySubjectExample.java b/app/src/main/java/com/rxjava2/android/samples/ReplaySubjectExample.java
deleted file mode 100644
index baedec7..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/ReplaySubjectExample.java
+++ /dev/null
@@ -1,129 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.subjects.ReplaySubject;
-
-/**
- * Created by amitshekhar on 17/12/16.
- */
-
-public class ReplaySubjectExample extends AppCompatActivity {
-
-    private static final String TAG = ReplaySubjectExample.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /* ReplaySubject emits to any observer all of the items that were emitted
-     * by the source Observable, regardless of when the observer subscribes.
-     */
-    private void doSomeWork() {
-
-        ReplaySubject<Integer> source = ReplaySubject.create();
-
-        source.subscribe(getFirstObserver()); // it will get 1, 2, 3, 4
-
-        source.onNext(1);
-        source.onNext(2);
-        source.onNext(3);
-        source.onNext(4);
-        source.onComplete();
-
-        /*
-         * it will emit 1, 2, 3, 4 for second observer also as we have used replay
-         */
-        source.subscribe(getSecondObserver());
-
-    }
-
-
-    private Observer<Integer> getFirstObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" First onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" First onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" First onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " First onComplete");
-            }
-        };
-    }
-
-    private Observer<Integer> getSecondObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
-                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
-                textView.append(AppConstant.LINE_SEPARATOR);
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" Second onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" Second onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" Second onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " Second onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ScanExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ScanExampleActivity.java
deleted file mode 100644
index c3ce226..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/ScanExampleActivity.java
+++ /dev/null
@@ -1,92 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observable;
-import io.reactivex.Observer;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.functions.BiFunction;
-import io.reactivex.schedulers.Schedulers;
-
-public class ScanExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = ScanExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /* Using scan operator, it sends also the previous result */
-    private void doSomeWork() {
-        getObservable()
-                // Run on a background thread
-                .subscribeOn(Schedulers.io())
-                // Be notified on the main thread
-                .observeOn(AndroidSchedulers.mainThread())
-                .scan(new BiFunction<Integer, Integer, Integer>() {
-                    @Override
-                    public Integer apply(Integer int1, Integer int2) throws Exception {
-                        return int1 + int2;
-                    }
-                })
-                .subscribe(getObserver());
-    }
-
-    private Observable<Integer> getObservable() {
-        return Observable.just(1, 2, 3, 4, 5);
-    }
-
-    private Observer<Integer> getObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/SimpleExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/SimpleExampleActivity.java
deleted file mode 100644
index 35fe203..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/SimpleExampleActivity.java
+++ /dev/null
@@ -1,90 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observable;
-import io.reactivex.Observer;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class SimpleExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = SimpleExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-     * simple example to emit two value one by one
-     */
-    private void doSomeWork() {
-        getObservable()
-                // Run on a background thread
-                .subscribeOn(Schedulers.io())
-                // Be notified on the main thread
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(getObserver());
-    }
-
-    private Observable<String> getObservable() {
-        return Observable.just("Cricket", "Football");
-    }
-
-    private Observer<String> getObserver() {
-        return new Observer<String>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(String value) {
-                textView.append(" onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext : value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/SingleObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/SingleObserverExampleActivity.java
deleted file mode 100644
index 68d4aae..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/SingleObserverExampleActivity.java
+++ /dev/null
@@ -1,71 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Single;
-import io.reactivex.SingleObserver;
-import io.reactivex.disposables.Disposable;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class SingleObserverExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = SingleObserverExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-     * simple example using SingleObserver
-     */
-    private void doSomeWork() {
-        Single.just("Amit")
-                .subscribe(getSingleObserver());
-    }
-
-    private SingleObserver<String> getSingleObserver() {
-        return new SingleObserver<String>() {
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onSuccess(String value) {
-                textView.append(" onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-        };
-    }
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/SkipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/SkipExampleActivity.java
deleted file mode 100644
index e12d510..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/SkipExampleActivity.java
+++ /dev/null
@@ -1,91 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observable;
-import io.reactivex.Observer;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class SkipExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = SkipExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /* Using skip operator, it only not emit
-    * the first 2 values.
-    */
-    private void doSomeWork() {
-        getObservable()
-                // Run on a background thread
-                .subscribeOn(Schedulers.io())
-                // Be notified on the main thread
-                .observeOn(AndroidSchedulers.mainThread())
-                .skip(2)
-                .subscribe(getObserver());
-    }
-
-    private Observable<Integer> getObservable() {
-        return Observable.just(1, 2, 3, 4, 5);
-    }
-
-    private Observer<Integer> getObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/TakeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/TakeExampleActivity.java
deleted file mode 100644
index ea55e33..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/TakeExampleActivity.java
+++ /dev/null
@@ -1,91 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import io.reactivex.Observable;
-import io.reactivex.Observer;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class TakeExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = TakeExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /* Using take operator, it only emits
-    * required number of values. here only 3 out of 5
-    */
-    private void doSomeWork() {
-        getObservable()
-                // Run on a background thread
-                .subscribeOn(Schedulers.io())
-                // Be notified on the main thread
-                .observeOn(AndroidSchedulers.mainThread())
-                .take(3)
-                .subscribe(getObserver());
-    }
-
-    private Observable<Integer> getObservable() {
-        return Observable.just(1, 2, 3, 4, 5);
-    }
-
-    private Observer<Integer> getObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ThrottleLastExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ThrottleLastExampleActivity.java
deleted file mode 100644
index 2fe83ac..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/ThrottleLastExampleActivity.java
+++ /dev/null
@@ -1,119 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import java.util.concurrent.TimeUnit;
-
-import io.reactivex.Observable;
-import io.reactivex.ObservableEmitter;
-import io.reactivex.ObservableOnSubscribe;
-import io.reactivex.Observer;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
-
-/**
- * Created by amitshekhar on 22/12/16.
- */
-
-public class ThrottleLastExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = ThrottleLastExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-    * Using throttleLast() -> emit the most recent items emitted by an Observable within
-    * periodic time intervals, so here it will emit 2, 6 and 7 as we have simulated it to be the
-    * last the element in the interval of 500 millis
-    */
-    private void doSomeWork() {
-        getObservable()
-                .throttleLast(500, TimeUnit.MILLISECONDS)
-                // Run on a background thread
-                .subscribeOn(Schedulers.io())
-                // Be notified on the main thread
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(getObserver());
-    }
-
-    private Observable<Integer> getObservable() {
-        return Observable.create(new ObservableOnSubscribe<Integer>() {
-            @Override
-            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
-                // send events with simulated time wait
-                Thread.sleep(0);
-                emitter.onNext(1); // skip
-                emitter.onNext(2); // deliver
-                Thread.sleep(505);
-                emitter.onNext(3); // skip
-                Thread.sleep(99);
-                emitter.onNext(4); // skip
-                Thread.sleep(100);
-                emitter.onNext(5); // skip
-                emitter.onNext(6); // deliver
-                Thread.sleep(305);
-                emitter.onNext(7); // deliver
-                Thread.sleep(510);
-                emitter.onComplete();
-            }
-        });
-    }
-
-    private Observer<Integer> getObserver() {
-        return new Observer<Integer>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(Integer value) {
-                textView.append(" onNext : ");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                textView.append(" value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext ");
-                Log.d(TAG, " value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/TimerExample.java b/app/src/main/java/com/rxjava2/android/samples/TimerExample.java
deleted file mode 100644
index 7277f69..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/TimerExample.java
+++ /dev/null
@@ -1,92 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import java.util.concurrent.TimeUnit;
-
-import io.reactivex.Observable;
-import io.reactivex.Observer;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class TimerExample extends AppCompatActivity {
-
-    private static final String TAG = TimerExample.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-     * simple example using timer to do something after 2 second
-     */
-    private void doSomeWork() {
-        getObservable()
-                // Run on a background thread
-                .subscribeOn(Schedulers.io())
-                // Be notified on the main thread
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(getObserver());
-    }
-
-    private Observable<? extends Long> getObservable() {
-        return Observable.timer(2, TimeUnit.SECONDS);
-    }
-
-    private Observer<Long> getObserver() {
-        return new Observer<Long>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(Long value) {
-                textView.append(" onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext : value : " + value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ZipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ZipExampleActivity.java
deleted file mode 100644
index abbcc3d..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/ZipExampleActivity.java
+++ /dev/null
@@ -1,130 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.model.User;
-import com.rxjava2.android.samples.utils.AppConstant;
-import com.rxjava2.android.samples.utils.Utils;
-
-import java.util.List;
-
-import io.reactivex.Observable;
-import io.reactivex.ObservableEmitter;
-import io.reactivex.ObservableOnSubscribe;
-import io.reactivex.Observer;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.functions.BiFunction;
-import io.reactivex.schedulers.Schedulers;
-
-/**
- * Created by amitshekhar on 27/08/16.
- */
-public class ZipExampleActivity extends AppCompatActivity {
-
-    private static final String TAG = ZipExampleActivity.class.getSimpleName();
-    Button btn;
-    TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /*
-    * Here we are getting two user list
-    * One, the list of cricket fans
-    * Another one, the list of football fans
-    * Then we are finding the list of users who loves both
-    */
-    private void doSomeWork() {
-        Observable.zip(getCricketFansObservable(), getFootballFansObservable(),
-                new BiFunction<List<User>, List<User>, List<User>>() {
-                    @Override
-                    public List<User> apply(List<User> cricketFans, List<User> footballFans) throws Exception {
-                        return Utils.filterUserWhoLovesBoth(cricketFans, footballFans);
-                    }
-                })
-                // Run on a background thread
-                .subscribeOn(Schedulers.io())
-                // Be notified on the main thread
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(getObserver());
-    }
-
-    private Observable<List<User>> getCricketFansObservable() {
-        return Observable.create(new ObservableOnSubscribe<List<User>>() {
-            @Override
-            public void subscribe(ObservableEmitter<List<User>> e) throws Exception {
-                if (!e.isDisposed()) {
-                    e.onNext(Utils.getUserListWhoLovesCricket());
-                    e.onComplete();
-                }
-            }
-        });
-    }
-
-    private Observable<List<User>> getFootballFansObservable() {
-        return Observable.create(new ObservableOnSubscribe<List<User>>() {
-            @Override
-            public void subscribe(ObservableEmitter<List<User>> e) throws Exception {
-                if (!e.isDisposed()) {
-                    e.onNext(Utils.getUserListWhoLovesFootball());
-                    e.onComplete();
-                }
-            }
-        });
-    }
-
-    private Observer<List<User>> getObserver() {
-        return new Observer<List<User>>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(List<User> userList) {
-                textView.append(" onNext");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                for (User user : userList) {
-                    textView.append(" firstName : " + user.firstName);
-                    textView.append(AppConstant.LINE_SEPARATOR);
-                }
-                Log.d(TAG, " onNext : " + userList.size());
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                textView.append(" onError : " + e.getMessage());
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onError : " + e.getMessage());
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/model/ApiUser.java b/app/src/main/java/com/rxjava2/android/samples/model/ApiUser.java
index 6335019..941bfc3 100644
--- a/app/src/main/java/com/rxjava2/android/samples/model/ApiUser.java
+++ b/app/src/main/java/com/rxjava2/android/samples/model/ApiUser.java
@@ -7,4 +7,13 @@ public class ApiUser {
     public long id;
     public String firstName;
     public String lastName;
+
+    @Override
+    public String toString() {
+        return "ApiUser{" +
+                "id=" + id +
+                ", firstName='" + firstName + '\'' +
+                ", lastName='" + lastName + '\'' +
+                '}';
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/model/Car.java b/app/src/main/java/com/rxjava2/android/samples/model/Car.java
index e223650..de771e4 100644
--- a/app/src/main/java/com/rxjava2/android/samples/model/Car.java
+++ b/app/src/main/java/com/rxjava2/android/samples/model/Car.java
@@ -10,13 +10,14 @@
  */
 public class Car {
 
-    private String brand;
+    private String brand="Volvo";
 
     public void setBrand(String brand) {
         this.brand = brand;
     }
 
     public Observable<String> brandDeferObservable() {
+//        return Observable.just(brand);
         return Observable.defer(new Callable<ObservableSource<? extends String>>() {
             @Override
             public ObservableSource<? extends String> call() throws Exception {
diff --git a/app/src/main/java/com/rxjava2/android/samples/model/User.java b/app/src/main/java/com/rxjava2/android/samples/model/User.java
index de5a522..5d64ffb 100644
--- a/app/src/main/java/com/rxjava2/android/samples/model/User.java
+++ b/app/src/main/java/com/rxjava2/android/samples/model/User.java
@@ -7,4 +7,13 @@ public class User {
     public long id;
     public String firstName;
     public String lastName;
+
+    @Override
+    public String toString() {
+        return "User{" +
+                "id=" + id +
+                ", firstName='" + firstName + '\'' +
+                ", lastName='" + lastName + '\'' +
+                '}';
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/AsyncSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/AsyncSubjectExampleActivity.java
new file mode 100644
index 0000000..f6f6f47
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/AsyncSubjectExampleActivity.java
@@ -0,0 +1,39 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.subjects.AsyncSubject;
+
+/**
+ * Created by amitshekhar on 17/12/16.
+ */
+
+public class AsyncSubjectExampleActivity extends AbsExampleActivity {
+
+    /* An AsyncSubject emits the last value (and only the last value) emitted by the source
+     * Observable, and only after that source Observable completes. (If the source Observable
+     * does not emit any values, the AsyncSubject also completes without emitting any values.)
+     */
+    protected void doSomeWork() {
+        AsyncSubject<Integer> source = AsyncSubject.create();
+
+        source.onNext(0);
+        source.subscribe(getObserver("First")); // it will emit only 4 and onComplete
+
+        source.onNext(1);
+        source.onNext(2);
+        source.onNext(3);
+
+        /*
+         * it will emit 4 and onComplete for second observer also.
+         */
+        source.subscribe(getObserver("Second"));
+
+        source.onNext(4);
+        source.onComplete();
+
+        source.subscribe(getObserver("Third"));
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/BehaviorSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/BehaviorSubjectExampleActivity.java
new file mode 100644
index 0000000..ba86805
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/BehaviorSubjectExampleActivity.java
@@ -0,0 +1,42 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.subjects.BehaviorSubject;
+
+/**
+ * Created by amitshekhar on 17/12/16.
+ */
+
+public class BehaviorSubjectExampleActivity extends AbsExampleActivity {
+
+    /* When an observer subscribes to a BehaviorSubject, it begins by emitting the item most
+     * recently emitted by the source Observable (or a seed/default value if none has yet been
+     * emitted) and then continues to emit any other items emitted later by the source Observable(s).
+     */
+    protected void doSomeWork() {
+
+        BehaviorSubject<Integer> source = BehaviorSubject.createDefault(-1);
+
+//        source.onNext(0); //如果启用这句话，firstObserver将获得 0 (最近发射的最后一个数据)，1，2，3，4
+
+        source.subscribe(getObserver("First")); // it will get -1, 1, 2, 3, 4 and onComplete
+
+        source.onNext(1);
+        source.onNext(2);
+        source.onNext(3);
+
+        /*
+         * it will emit 3(last emitted), 4 and onComplete for second observer also.
+         */
+        source.subscribe(getObserver("Second"));
+
+        source.onNext(4);
+        source.onComplete();
+
+        source.subscribe(getObserver("Third"));
+
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java
new file mode 100644
index 0000000..e65479e
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java
@@ -0,0 +1,57 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.Observable;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class BufferExampleActivity extends AbsExampleActivity {
+
+    /*
+     * simple example using buffer operator - bundles all emitted values into a list
+     */
+    protected void doSomeWork() {
+
+    /*
+
+        Observable<List<String>> buffered = getObservable().buffer(3, 1);
+
+        // 3 means,  it takes max of three from its start index and create list
+        // 1 means, it jumps one step every time
+        // so the it gives the following list
+        // 1 - one, two, three
+        // 2 - two, three, four
+        // 3 - three, four, five
+        // 4 - four, five
+        // 5 - five
+
+        buffered.subscribe(getObserver());
+
+        */
+
+       /*
+        //每次取2个  每次跳过3个
+        //第一次：one、two
+        //第二次：four、five
+        getObservable().buffer(2, 3)
+                .subscribe(getObserver());
+        */
+
+        //每次取3个，每次跳过2个
+        //第一次：one、two、three
+        //第二次：three、four、five
+        //第三次：five
+        getObservable().buffer(3, 2)
+                .subscribe(getObserver());
+
+    }
+
+    private Observable<String> getObservable() {
+        return Observable.just("one", "two", "three", "four", "five");
+    }
+
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java
new file mode 100644
index 0000000..6a03e0d
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java
@@ -0,0 +1,47 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import java.util.Random;
+
+import io.reactivex.Completable;
+import io.reactivex.CompletableEmitter;
+import io.reactivex.CompletableOnSubscribe;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class CompletableObserverExampleActivity extends AbsExampleActivity {
+
+    /*
+     * simple example using CompletableObserver
+     */
+    protected void doSomeWork() {
+        //延迟多久发射onComplete
+//        Completable completable = Completable.timer(1000, TimeUnit.MILLISECONDS);
+
+        Completable completable = Completable.create(new CompletableOnSubscribe() {
+            @Override
+            public void subscribe(CompletableEmitter e) throws Exception {
+                if (!e.isDisposed()) {
+                    int randomInt = new Random().nextInt(10);
+                    if (randomInt % 2 == 0) {
+                        e.onComplete();
+                    } else {
+                        e.onError(new IllegalStateException("Can't completable because of error occur."));
+                    }
+                }
+            }
+        });
+
+        completable
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getCompletableObserver());
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java
new file mode 100644
index 0000000..da35280
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java
@@ -0,0 +1,36 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.Observable;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class ConcatExampleActivity extends AbsExampleActivity {
+
+    private static final String TAG = ConcatExampleActivity.class.getSimpleName();
+
+
+    /*
+     * Using concat operator to combine Observable : concat maintain
+     * the order of Observable.
+     * It will emit all the 7 values in order
+     * here - first "A1", "A2", "A3", "A4" and then "B1", "B2", "B3"
+     * first all from the first Observable and then
+     * all from the second Observable all in order
+     */
+    protected void doSomeWork() {
+        final String[] aStrings = {"A1", "A2", "A3", "A4"};
+        final String[] bStrings = {"B1", "B2", "B3"};
+
+        final Observable<String> aObservable = Observable.fromArray(aStrings);
+        final Observable<String> bObservable = Observable.fromArray(bStrings);
+
+        Observable.concat(aObservable, bObservable)
+                .subscribe(getObserver());
+    }
+
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/DebounceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/DebounceExampleActivity.java
new file mode 100644
index 0000000..3ea8656
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/DebounceExampleActivity.java
@@ -0,0 +1,71 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableEmitter;
+import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 22/12/16.
+ */
+
+public class DebounceExampleActivity extends AbsExampleActivity {
+
+    private static final String TAG = DebounceExampleActivity.class.getSimpleName();
+
+
+    /*
+    * Using debounce() -> only emit an item from an Observable if a particular time-span has
+    * passed without it emitting another item, so it will emit 2, 4, 5 as we have simulated it.
+    */
+    protected void doSomeWork() {
+
+        //debounce 是发射所有 时间片段 交集 中最后一个元素。
+        //这里的时间片段是指每次发射元素的当前时刻+超时时间形成的时间片段
+        getObservable()
+                .debounce(500, TimeUnit.MILLISECONDS)
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getObserver());
+    }
+
+    private Observable<Integer> getObservable() {
+        return Observable.create(new ObservableOnSubscribe<Integer>() {
+            @Override
+            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
+                // send events with simulated time wait
+                emitter.onNext(1); // skip
+                Thread.sleep(400);
+                emitter.onNext(2); // deliver
+                Thread.sleep(505);
+                emitter.onNext(3); // skip
+                Thread.sleep(100);
+                emitter.onNext(4); // deliver
+                Thread.sleep(605);
+                emitter.onNext(5); // deliver
+                Thread.sleep(510);
+                emitter.onComplete();
+
+                /*
+                分析如下：
+                1和2在400毫秒处有交集，所以1被扔掉。
+                2和3之间有500毫秒的间隔，没有交集，所以2被发射出去。
+                3在905毫秒出准备发射，但是紧接着4在1005毫秒处也要准备发射，所以3和4有交集，3被扔掉。
+                4和5之间有605毫秒的间隔，没有交集，所以4被发射出去。
+                5在接下来的500毫秒内没有和其他元素有交集，所以发射出去。
+                （如还不明白，建议在纸上画出各个元素的时间片段）
+                 */
+
+            }
+        });
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java
new file mode 100644
index 0000000..dbdf465
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java
@@ -0,0 +1,33 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.model.Car;
+
+import io.reactivex.Observable;
+
+/**
+ * Created by amitshekhar on 30/08/16.
+ */
+public class DeferExampleActivity extends AbsExampleActivity {
+
+    /*
+     * Defer used for Deferring Observable code until subscription in RxJava
+     */
+    protected void doSomeWork() {
+
+        Car car = new Car();
+
+//        car.setBrand("Audi");
+
+        Observable<String> brandDeferObservable = car.brandDeferObservable();
+
+        car.setBrand("BMW");  // Even if we are setting the brand after creating Observable
+                              // we will get the brand as BMW.
+                              // If we had not used defer, we would have got null as the brand.
+
+        brandDeferObservable
+                .subscribe(getObserver());
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java
new file mode 100644
index 0000000..2846f8f
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java
@@ -0,0 +1,52 @@
+package com.rxjava2.android.samples.operators;
+
+import android.os.SystemClock;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import java.util.concurrent.Callable;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableSource;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class DisposableExampleActivity extends AbsExampleActivity {
+
+    private final CompositeDisposable disposables = new CompositeDisposable();
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        disposables.clear(); // do not send event after activity has been destroyed
+    }
+
+    /*
+     * Example to understand how to use disposables.
+     * disposables is cleared in onDestroy of this activity.
+     */
+    protected void doSomeWork() {
+        disposables.add(sampleObservable()
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribeWith(this.<String>getDisposableObserver()));
+    }
+
+    static Observable<String> sampleObservable() {
+        return Observable.defer(new Callable<ObservableSource<? extends String>>() {
+            @Override
+            public ObservableSource<? extends String> call() throws Exception {
+                // Do some long running operation
+                SystemClock.sleep(2000);
+                return Observable.just("one", "two", "three", "four", "five");
+            }
+        });
+    }
+}
+
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/DistinctExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/DistinctExampleActivity.java
new file mode 100644
index 0000000..62f70bd
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/DistinctExampleActivity.java
@@ -0,0 +1,20 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.Observable;
+
+/**
+ * Created by techteam on 13/09/16.
+ */
+public class DistinctExampleActivity extends AbsExampleActivity {
+
+  protected void doSomeWork(){
+     getObservable().distinct() .subscribe(getObserver());
+  }
+
+  private Observable<Integer> getObservable() {
+    return Observable.just(1, 2, 1, 1, 2, 3, 4 ,6, 4);
+  }
+
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java
new file mode 100644
index 0000000..dc85561
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java
@@ -0,0 +1,28 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.Observable;
+import io.reactivex.functions.Predicate;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class FilterExampleActivity extends AbsExampleActivity {
+
+    /*
+     * simple example by using filter operator to emit only even value
+     *
+     */
+    protected void doSomeWork() {
+        Observable.just(1, 2, 3, 4, 5, 6)
+                .filter(new Predicate<Integer>() {
+                    @Override
+                    public boolean test(Integer integer) throws Exception {
+                        return integer % 2 == 0;
+                    }
+                })
+                .subscribe(getObserver());
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java
new file mode 100644
index 0000000..f1308ea
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java
@@ -0,0 +1,84 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import org.reactivestreams.Subscriber;
+import org.reactivestreams.Subscription;
+
+import io.reactivex.Flowable;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class FlowableExampleActivity extends AbsExampleActivity {
+
+    private Subscription mSubscription;
+
+    /*
+     * simple example using Flowable
+     */
+    protected void doSomeWork() {
+
+        if (mSubscription != null) {
+            mSubscription.cancel();
+        }
+
+         Flowable.range(0, 20)
+                .subscribeOn(Schedulers.io())
+                 .observeOn(AndroidSchedulers.mainThread())
+                .subscribeWith(new Subscriber<Integer>() {
+
+                    //当订阅后，会首先调用这个方法，其实就相当于onStart()，
+                    //传入的Subscription s参数可以用于请求数据或者取消订阅
+                    @Override
+                    public void onSubscribe(Subscription s) {
+                        FlowableExampleActivity.this.onSubscribe("",null);
+                        mSubscription = s;
+                        //要说明一下，request这个方法若不调用,下游的onNext与OnComplete都不会调用；
+                        // 若你写的数量小于真实数据量，只会传你的个数，而且不会调用onComplete方法（毕竟没有传完嘛，当然没有complete）
+//                        mSubscription.request(10);
+                        mSubscription.request(1);
+                    }
+
+                    @Override
+                    public void onNext(Integer o) {
+//                        SystemClock.sleep(1000);
+                        FlowableExampleActivity.this.onNext("",o);
+                        mSubscription.request(1);
+                    }
+
+                    @Override
+                    public void onError(Throwable t) {
+                        FlowableExampleActivity.this.onError("",t);
+                    }
+
+                    @Override
+                    public void onComplete() {
+                        FlowableExampleActivity.this.onComplete("");
+                    }
+                });
+
+
+//        Flowable<Integer> observable = Flowable.just(1, 2, 3, 4);
+//
+//        observable.reduce(50, new BiFunction<Integer, Integer, Integer>() {
+//            @Override
+//            public Integer apply(Integer t1, Integer t2) {
+//                return t1 + t2;
+//            }
+//        }).subscribe(getObserver());
+
+    }
+
+
+    @Override
+    protected void onDestroy() {
+        if (mSubscription!=null) {
+            mSubscription.cancel();
+        }
+        super.onDestroy();
+//        mCompositeDisposable.dispose();
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java
new file mode 100644
index 0000000..5c2bc7c
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java
@@ -0,0 +1,43 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class IntervalExampleActivity extends AbsExampleActivity {
+
+    private final CompositeDisposable disposables = new CompositeDisposable();
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        disposables.clear(); // clearing it : do not emit after destroy
+    }
+
+    /*
+     * simple example using interval to run task at an interval of 2 sec
+     * which start immediately
+     */
+    protected void doSomeWork() {
+        disposables.add(getObservable()
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribeWith(this.getDisposableObserver()));
+    }
+
+    private Observable<? extends Long> getObservable() {
+        //第一个参数是initialDelay初始化延迟，第二个参数是间隔时间。
+        return Observable.interval(0, 1, TimeUnit.SECONDS);
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/LastOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/LastOperatorExampleActivity.java
new file mode 100644
index 0000000..abc2fe9
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/LastOperatorExampleActivity.java
@@ -0,0 +1,24 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.Observable;
+
+/**
+ * Created by techteam on 13/09/16.
+ */
+public class LastOperatorExampleActivity extends AbsExampleActivity {
+
+    protected void doSomeWork() {
+        getObservable().last("ADefault") // the default item ("ADefault") to emit if the source ObservableSource is empty
+                .subscribe(this.<String>getSingleObserver());
+        //经过Last操作后，Observable变成SingleObservable了
+    }
+
+    private Observable<String> getObservable() {
+//        return Observable.empty();
+        return Observable.just("A1", "A2", "A3", "A4", "A5", "A6");
+    }
+
+
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java
new file mode 100644
index 0000000..9d9eb0e
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java
@@ -0,0 +1,56 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.model.ApiUser;
+import com.rxjava2.android.samples.model.User;
+import com.rxjava2.android.samples.utils.Utils;
+
+import java.util.List;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableEmitter;
+import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.functions.Function;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class MapExampleActivity extends AbsExampleActivity {
+
+    /*
+    * Here we are getting ApiUser Object from api server
+    * then we are converting it into User Object because
+    * may be our database support User Not ApiUser Object
+    * Here we are using Map Operator to do that
+    */
+    protected void doSomeWork() {
+        getObservable()
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .map(new Function<List<ApiUser>, List<User>>() {
+
+                    @Override
+                    public List<User> apply(List<ApiUser> apiUsers) throws Exception {
+                        return Utils.convertApiUserListToUserList(apiUsers);
+                    }
+                })
+                .subscribe(getObserver());
+    }
+
+    private Observable<List<ApiUser>> getObservable() {
+        return Observable.create(new ObservableOnSubscribe<List<ApiUser>>() {
+            @Override
+            public void subscribe(ObservableEmitter<List<ApiUser>> e) throws Exception {
+                if (!e.isDisposed()) {
+                    e.onNext(Utils.getApiUserList());
+                    e.onComplete();
+                }
+            }
+        });
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java
new file mode 100644
index 0000000..e75effe
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java
@@ -0,0 +1,28 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.Observable;
+
+/**
+ * Created by amitshekhar on 28/08/16.
+ */
+public class MergeExampleActivity extends AbsExampleActivity {
+    /*
+     * Using merge operator to combine Observable : merge does not maintain
+     * the order of Observable.
+     * It will emit all the 7 values may not be in order
+     * Ex - "A1", "B1", "A2", "A3", "A4", "B2", "B3" - may be anything
+     */
+    protected void doSomeWork() {
+        final String[] aStrings = {"A1", "A2", "A3", "A4"};
+        final String[] bStrings = {"B1", "B2", "B3"};
+
+        final Observable<String> aObservable = Observable.fromArray(aStrings);
+        final Observable<String> bObservable = Observable.fromArray(bStrings);
+
+        Observable.merge(aObservable, bObservable)
+                .subscribe(getObserver());
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/PublishSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/PublishSubjectExampleActivity.java
new file mode 100644
index 0000000..83c3a09
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/PublishSubjectExampleActivity.java
@@ -0,0 +1,41 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.subjects.PublishSubject;
+
+/**
+ * Created by amitshekhar on 17/12/16.
+ */
+
+public class PublishSubjectExampleActivity extends AbsExampleActivity {
+
+    /* PublishSubject emits to an observer only those items that are emitted
+     * by the source Observable, subsequent to the time of the subscription.
+     */
+    protected void doSomeWork() {
+
+        //PublishSubject就像鼠标事件，不管有没有订阅者，他都按照他的设定发事件，什么时候有订阅者，那么订阅者就从那个时候获取事件。
+        //与之相反的是ReplaySubject,不管订阅者什么时候订阅，都能获取完整事件。
+        PublishSubject<Integer> source = PublishSubject.create();
+        source.onNext(-1);
+        source.onNext(0);
+
+        source.subscribe(this.<Integer>getObserver("First")); // it will get 1, 2, 3, 4 and onComplete
+
+        source.onNext(1);
+        source.onNext(2);
+        source.onNext(3);
+//        source.onComplete();//如果在这里onComplete了，那么后面的订阅者只能收到onComplete事件
+
+        /*
+         * it will emit 4 and onComplete for second observer also.
+         */
+        source.subscribe(this.<Integer>getObserver("Second"));
+
+        source.onNext(4);
+        source.onComplete();
+
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java
new file mode 100644
index 0000000..6c1fa8c
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java
@@ -0,0 +1,31 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.Observable;
+import io.reactivex.functions.BiFunction;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class ReduceExampleActivity extends AbsExampleActivity {
+    /*
+     * simple example using reduce to add all the number
+     */
+    protected void doSomeWork() {
+        getObservable()
+                .reduce(new BiFunction<Integer, Integer, Integer>() {
+                    @Override
+                    public Integer apply(Integer t1, Integer t2) {
+                        return t1 + t2;
+                    }
+                })
+                .subscribe(this.<Integer>getMaybeObserver());
+    }
+
+    private Observable<Integer> getObservable() {
+        return Observable.just(1, 2, 3, 4);
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java
new file mode 100644
index 0000000..3d3e4f7
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java
@@ -0,0 +1,45 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.observables.ConnectableObservable;
+import io.reactivex.subjects.PublishSubject;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class ReplayExampleActivity extends AbsExampleActivity {
+
+    /* Using replay operator, replay ensure that all observers see the same sequence
+     * of emitted items, even if they subscribe after the Observable has begun emitting items
+     */
+    protected void doSomeWork() {
+
+        PublishSubject<Integer> source = PublishSubject.create();
+        ConnectableObservable<Integer> connectableObservable = source.replay(3); // bufferSize = 3 to retain 3 values to replay
+        connectableObservable.connect(); // connecting the connectableObservable
+
+        source.onNext(-1);
+        source.onNext(0);
+        connectableObservable.subscribe(this.<Integer>getObserver("First"));
+
+        source.onNext(1);
+        source.onNext(2);
+        source.onNext(3);
+        source.onNext(4);
+        source.onComplete();
+
+
+        /*
+         * Replay操作符会给onComplete后订阅Observable的订阅者Replay发射最后几个元素。
+         * 在onComplete之前订阅的不受影响（会收到完整的元素。哪怕在订阅之前已经开始onNext数据了）
+         *
+         * it will emit 2, 3, 4 as (count = 3), retains the 3 values for replay
+         */
+        connectableObservable.subscribe(this.<Integer>getObserver("Second"));
+
+    }
+
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ReplaySubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ReplaySubjectExampleActivity.java
new file mode 100644
index 0000000..484b7e8
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ReplaySubjectExampleActivity.java
@@ -0,0 +1,49 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.subjects.ReplaySubject;
+
+/**
+ * Created by amitshekhar on 17/12/16.
+ */
+
+public class ReplaySubjectExampleActivity extends AbsExampleActivity {
+
+    /* ReplaySubject emits to any observer all of the items that were emitted
+     * by the source Observable, regardless of when the observer subscribes.
+     */
+    protected void doSomeWork() {
+
+        //ReplaySubject 和 PublishSubject相反，
+        //ReplaySubject不管订阅者什么时候订阅都能获取到完整的发射数据。
+        //而PublishSubject会一直按照自己的步调发射数据，你在哪订阅就从这个时间点开始才能获取到事件
+        //所谓的完整数据指的是从第一个onNext 一直到 onComplete 或 onError
+        ReplaySubject<Integer> source = ReplaySubject.create();
+
+
+        source.onNext(-1);
+        source.onNext(0);
+
+        source.subscribe(this.<Integer>getObserver("First")); // it will get -1, 0, 1, 2, 3, 4
+
+        source.onNext(1);
+        source.onNext(2);
+        source.onNext(3);
+        source.onNext(4);
+//        source.onComplete();
+//OnComplete后发射数据就无效了。如果仍要发射数据，需要重新创建ReplaySubject 并重新订阅
+//        source.onNext(5);
+
+        /*
+         * it will emit -1, 0, 1, 2, 3, 4 for second observer also as we have used replay
+         */
+        source.subscribe(this.<Integer>getObserver("Second"));
+
+        source.onNext(6);
+        source.onComplete();
+
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ScanExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ScanExampleActivity.java
new file mode 100644
index 0000000..e9ee9dd
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ScanExampleActivity.java
@@ -0,0 +1,35 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.Observable;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.functions.BiFunction;
+import io.reactivex.schedulers.Schedulers;
+
+public class ScanExampleActivity extends AbsExampleActivity {
+
+    /* Using scan operator, it sends also the previous result */
+    protected void doSomeWork() {
+        getObservable()
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .scan(new BiFunction<Integer, Integer, Integer>() {
+                    @Override
+                    public Integer apply(Integer int1, Integer int2) throws Exception {
+                        return int1 + int2;
+                    }
+                })
+                .subscribe(getObserver());
+        //Scan又叫累加器。将原始第一个与第二个应用函数的值作为第二个发射出去数据（第一个发射的数据就是原始第一个数据）
+        //第三个发射的数据是原始第三个与第二个发射出去的应用函数后的值。
+
+
+    }
+
+    private Observable<Integer> getObservable() {
+        return Observable.just(1, 2, 3, 4, 5);
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/SimpleExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/SimpleExampleActivity.java
new file mode 100644
index 0000000..c6168ce
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/SimpleExampleActivity.java
@@ -0,0 +1,31 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.Observable;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class SimpleExampleActivity extends AbsExampleActivity {
+
+    /*
+     * simple example to emit two value one by one
+     */
+    protected void doSomeWork() {
+        getObservable()
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getObserver());
+    }
+
+    private Observable<String> getObservable() {
+        return Observable.just("Cricket", "Football");
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java
new file mode 100644
index 0000000..87b11b3
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java
@@ -0,0 +1,51 @@
+package com.rxjava2.android.samples.operators;
+
+import android.util.Log;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.Single;
+import io.reactivex.SingleEmitter;
+import io.reactivex.SingleOnSubscribe;
+import io.reactivex.functions.Consumer;
+import io.reactivex.functions.Function;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class SingleObserverExampleActivity extends AbsExampleActivity {
+
+    /*
+     * simple example using SingleObserver
+     */
+    protected void doSomeWork() {
+        Single.create(new SingleOnSubscribe<String>() {
+            @Override
+            public void subscribe(SingleEmitter<String> e) throws Exception {
+                if (!e.isDisposed()) {
+                    e.onSuccess("Hello Success!");
+//                    e.onError(new RuntimeException("Occur RuntimeException"));
+//                    throw new RuntimeException("Occur RuntimeException");
+                }
+            }
+        }).doOnSuccess(new Consumer<String>() {
+            @Override
+            public void accept(String s) throws Exception {
+                Log.d(TAG, "doOnSuccess: " + s);
+            }
+        }).doOnError(new Consumer<Throwable>() {
+            @Override
+            public void accept(Throwable throwable) throws Exception {
+                Log.e(TAG, "doOnError: " + throwable.getMessage());
+            }
+        }).onErrorReturn(new Function<Throwable, String>() {
+            @Override
+            public String apply(Throwable throwable) throws Exception {
+                return "Exception message: "+throwable.getMessage();
+            }
+        }).subscribe(getSingleObserver());
+//        Single.just("Amit")
+//                .subscribe(getSingleObserver());
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java
new file mode 100644
index 0000000..aecedc2
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java
@@ -0,0 +1,31 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.Observable;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class SkipExampleActivity extends AbsExampleActivity {
+
+    /* Using skip operator, it only not emit
+    * the first 2 values.
+    */
+    protected void doSomeWork() {
+        getObservable()
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .skip(2)
+                .subscribe(getObserver());
+    }
+
+    private Observable<Integer> getObservable() {
+        return Observable.just(1, 2, 3, 4, 5);
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java
new file mode 100644
index 0000000..168de2d
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java
@@ -0,0 +1,32 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import io.reactivex.Observable;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class TakeExampleActivity extends AbsExampleActivity {
+
+    /*
+    * Using take operator, it only emits
+    * required number of values. here only 3 out of 5
+    */
+    protected void doSomeWork() {
+        getObservable()
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .take(3)
+                .subscribe(getObserver());
+    }
+
+    private Observable<Integer> getObservable() {
+        return Observable.just(1, 2, 3, 4, 5);
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleFirstExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleFirstExampleActivity.java
new file mode 100644
index 0000000..bc05cb1
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleFirstExampleActivity.java
@@ -0,0 +1,58 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableEmitter;
+import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.schedulers.Schedulers;
+
+
+/**
+ * Created by threshold on 2017/1/11.
+ */
+
+public class ThrottleFirstExampleActivity extends AbsExampleActivity {
+
+    protected void doSomeWork() {
+        getObservable()
+                .throttleFirst(500, TimeUnit.MILLISECONDS)
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getObserver());
+    }
+
+    private Observable<Integer> getObservable() {
+        return Observable.create(new ObservableOnSubscribe<Integer>() {
+            @Override
+            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
+                // send events with simulated time wait
+                Thread.sleep(0);
+                emitter.onNext(1); // skip
+                emitter.onNext(2); // deliver
+                Thread.sleep(505);
+                emitter.onNext(3); // skip
+                Thread.sleep(99);
+                emitter.onNext(4); // skip
+                Thread.sleep(100);
+                emitter.onNext(5); // skip
+                emitter.onNext(6); // deliver
+                Thread.sleep(305);
+                emitter.onNext(7); // deliver
+                Thread.sleep(510);
+                emitter.onComplete();
+                /*
+                0----------500-------------1000----------1500
+                0------------505--604--704--1009----------1519
+                1,2-----------3----4---5,6----7-----------Complete
+                 */
+            }
+        });
+    }
+
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleLastExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleLastExampleActivity.java
new file mode 100644
index 0000000..33f8ba9
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleLastExampleActivity.java
@@ -0,0 +1,62 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableEmitter;
+import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 22/12/16.
+ */
+
+public class ThrottleLastExampleActivity extends AbsExampleActivity {
+
+    /*
+    * Using throttleLast() -> emit the most recent items emitted by an Observable within
+    * periodic time intervals, so here it will emit 2, 6 and 7 as we have simulated it to be the
+    * last the element in the interval of 500 millis
+    */
+    protected void doSomeWork() {
+        getObservable()
+                .throttleLast(500, TimeUnit.MILLISECONDS)
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getObserver());
+    }
+
+    private Observable<Integer> getObservable() {
+        return Observable.create(new ObservableOnSubscribe<Integer>() {
+            @Override
+            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
+                // send events with simulated time wait
+                Thread.sleep(0);
+                emitter.onNext(1); // skip
+                emitter.onNext(2); // deliver
+                Thread.sleep(505);
+                emitter.onNext(3); // skip
+                Thread.sleep(99);
+                emitter.onNext(4); // skip
+                Thread.sleep(100);
+                emitter.onNext(5); // skip
+                emitter.onNext(6); // deliver
+                Thread.sleep(305);
+                emitter.onNext(7); // deliver
+                Thread.sleep(510);
+                emitter.onComplete();
+                /*
+                0----------500-------------1000----------1500
+                0------------505--604--704--1009----------1519
+                1,2-----------3----4---5,6----7-----------Complete
+                 */
+            }
+        });
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/TimerExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/TimerExampleActivity.java
new file mode 100644
index 0000000..f4244ee
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/TimerExampleActivity.java
@@ -0,0 +1,33 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class TimerExampleActivity extends AbsExampleActivity {
+
+    /*
+     * simple example using timer to do something after 2 second
+     */
+    protected void doSomeWork() {
+        getObservable()
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getObserver());
+    }
+
+    private Observable<? extends Long> getObservable() {
+        //延迟2秒后发射一个0.
+        // timer就是定时器，到点后仅发射一个0
+        return Observable.timer(2, TimeUnit.SECONDS);
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/WindowExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/WindowExampleActivity.java
new file mode 100644
index 0000000..37592f2
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/WindowExampleActivity.java
@@ -0,0 +1 @@
+package com.rxjava2.android.samples.operators;

import android.util.Log;

import com.rxjava2.android.samples.AbsExampleActivity;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends AbsExampleActivity {

    /*
     * Sample of using window
     */
    protected void doSomeWork() {
//        Observable.create(new ObservableOnSubscribe<Long>() {
//            @Override
//            public void subscribe(ObservableEmitter<Long> e) throws Exception {
//                //e.onNext(-1L); //在这里发射一个就相当于0秒也发射了一个数据
//                for (int i =0 ;i<12;i++) {
//                    Thread.sleep(1000);
//                    e.onNext((long)i);
//                    Log.d(TAG, "e.onNext:" + i);
//                }
//                e.onComplete();
//            }
//        })
        Observable.interval(1,TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<Observable<Long>>() {
                    @Override
                    public void accept(Observable<Long> observable) {
                        Log.d(TAG, "Sub Divide begin....");
                        textView.append("Sub Divide begin ....");
                        textView.append(AppConstant.LINE_SEPARATOR);
                        observable
                                .subscribeOn(Schedulers.io())
                                .observeOn(AndroidSchedulers.mainThread())
                                .subscribe(new Consumer<Long>() {
                            @Override
                            public void accept(Long aLong) {
                                Log.d(TAG, "Next:" + aLong);
                                textView.append("Next:" + aLong);
                                textView.append(AppConstant.LINE_SEPARATOR);
                            }
                        });
                    }
                });

        /*
        输出
        subdivide begin……
        Next:0
        Next:1
        subdivide begin……
        Next:2
        Next:3
        Next:4
        subdivide begin……
        Next:5
        Next:6
        Next:7
        subdivide begin……
        Next:8
        Next:9
        Next:10
        subdivide begin……
        Next:11

        为什么不是 0，1，2     3，4，5 ..... 这种形式呢。
        同学，问的非常好！！！
        因为0秒的时刻啥也没发射，1秒的时刻发射了0，2秒的时刻发射了1，3秒的时刻发射了2
        "对呀，前3秒嘛，因该0，1，2嘛"，但是3秒是指时间片段，[0,1) [1,2) [2,3) 左闭右开 这三秒只发射了0和1
         */
    }
}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java
new file mode 100644
index 0000000..58e504a
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java
@@ -0,0 +1,65 @@
+package com.rxjava2.android.samples.operators;
+
+import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.model.User;
+import com.rxjava2.android.samples.utils.Utils;
+
+import java.util.List;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableEmitter;
+import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.functions.BiFunction;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 27/08/16.
+ */
+public class ZipExampleActivity extends AbsExampleActivity {
+    /*
+    * Here we are getting two user list
+    * One, the list of cricket fans
+    * Another one, the list of football fans
+    * Then we are finding the list of users who loves both
+    */
+    protected void doSomeWork() {
+        Observable.zip(getCricketFansObservable(), getFootballFansObservable(),
+                new BiFunction<List<User>, List<User>, List<User>>() {
+                    @Override
+                    public List<User> apply(List<User> cricketFans, List<User> footballFans) throws Exception {
+                        return Utils.filterUserWhoLovesBoth(cricketFans, footballFans);
+                    }
+                })
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getObserver());
+    }
+
+    private Observable<List<User>> getCricketFansObservable() {
+        return Observable.create(new ObservableOnSubscribe<List<User>>() {
+            @Override
+            public void subscribe(ObservableEmitter<List<User>> e) throws Exception {
+                if (!e.isDisposed()) {
+                    e.onNext(Utils.getUserListWhoLovesCricket());
+                    e.onComplete();
+                }
+            }
+        });
+    }
+
+    private Observable<List<User>> getFootballFansObservable() {
+        return Observable.create(new ObservableOnSubscribe<List<User>>() {
+            @Override
+            public void subscribe(ObservableEmitter<List<User>> e) throws Exception {
+                if (!e.isDisposed()) {
+                    e.onNext(Utils.getUserListWhoLovesFootball());
+                    e.onComplete();
+                }
+            }
+        });
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java b/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
index 0311e64..ddf699f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
+++ b/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
@@ -1,10 +1,22 @@
 package com.rxjava2.android.samples.utils;
 
+import android.util.Log;
+
 import com.rxjava2.android.samples.model.ApiUser;
 import com.rxjava2.android.samples.model.User;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Random;
+import java.util.function.Consumer;
+
+import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.functions.BiFunction;
+
+import static android.icu.lang.UCharacter.GraphemeClusterBreak.T;
+import static com.rxjava2.android.samples.R.id.textView;
 
 /**
  * Created by amitshekhar on 27/08/16.
@@ -120,4 +132,5 @@ public static List<User> filterUserWhoLovesBoth(List<User> cricketFans, List<Use
         }
         return userWhoLovesBoth;
     }
+
 }
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 1eb937a..eb7d49d 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -190,6 +190,13 @@
             android:text="@string/async_subject"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startThrottleFirstActivity"
+            android:text="@string/throttle_first"
+            android:textColor="@android:color/black" />
+
         <Button
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -204,5 +211,12 @@
             android:text="@string/debounce"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startWindowActivity"
+            android:text="@string/window"
+            android:textColor="@android:color/black" />
+
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 391beea..f22fd33 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -28,4 +28,6 @@
     <string name="async_subject">AsyncSubject</string>
     <string name="throttle_last">ThrottleLast</string>
     <string name="debounce">Debounce</string>
+    <string name="window">Window</string>
+    <string name="throttle_first">ThrottleFirst</string>
 </resources>
diff --git a/build.gradle b/build.gradle
index c20bca1..74b2ab0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.2'
+        classpath 'com.android.tools.build:gradle:2.2.3'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle.properties b/gradle.properties
index 1d3591c..1f8fad9 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,18 +1,17 @@
-# Project-wide Gradle settings.
-
-# IDE (e.g. Android Studio) users:
-# Gradle settings configured through the IDE *will override*
-# any settings specified in this file.
-
+## Project-wide Gradle settings.
+#
 # For more details on how to configure your build environment visit
 # http://www.gradle.org/docs/current/userguide/build_environment.html
-
+#
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
-# Default value: -Xmx10248m -XX:MaxPermSize=256m
+# Default value: -Xmx1024m -XX:MaxPermSize=256m
 # org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
-
+#
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
-# org.gradle.parallel=true
\ No newline at end of file
+# org.gradle.parallel=true
+#Fri Jan 06 16:06:01 CST 2017
+systemProp.http.proxyHost=127.0.0.1
+systemProp.http.proxyPort=1086

From 0cf5b0169ba441f56080272e5284bd9089a5c06d Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sun, 22 Jan 2017 12:58:55 +0530
Subject: [PATCH 033/137] Change in compile

---
 app/build.gradle | 15 +--------------
 1 file changed, 1 insertion(+), 14 deletions(-)

diff --git a/app/build.gradle b/app/build.gradle
index 5dfd943..c3c8d89 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -19,24 +19,11 @@ android {
     }
 }
 
-//compileOptions {
-//    sourceCompatibility JavaVersion.VERSION_1_8
-//    targetCompatibility JavaVersion.VERSION_1_8
-//}
-
-//packagingOptions {
-//     exclude 'LICENSE'
-//     exclude 'LICENSE.txt'
-//}
-
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:25.1.0'
-
-     // https://mvnrepository.com/artifact/io.reactivex.rxjava2/rxjava
-    compile group: 'io.reactivex.rxjava2', name: 'rxjava', version: '2.0.4'
-    // https://mvnrepository.com/artifact/io.reactivex.rxjava2/rxandroid
+    compile 'io.reactivex.rxjava2:rxjava:2.0.4'
     compile('io.reactivex.rxjava2:rxandroid:2.0.1'){
         exclude group: 'io.reactivex.rxjava2', module: 'rxjava'
     }

From b9c1b50f39770419f2455a76c39cadbf0055b30b Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sun, 22 Jan 2017 13:01:05 +0530
Subject: [PATCH 034/137] Update REAME.md

---
 README.md | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/README.md b/README.md
index 9fac2b8..7e8b484 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Users switching from 1.x to 2.x have to re-organize their imports, but carefully
 
 Add this in your build.gradle
 ```groovy
-compile 'io.reactivex.rxjava2:rxjava:2.0.2'
+compile 'io.reactivex.rxjava2:rxjava:2.0.4'
 ```
 If you are using RxAndroid also, then add the following
 ```groovy
@@ -75,22 +75,22 @@ RxJava1 -> RxJava2
 
 # Highlights of the examples :
 
-* [DisposableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/DisposableExampleActivity.java) - Using `CompositeDisposable`
-* [FlowableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/FlowableExampleActivity.java) - Using `Flowable` and `reduce` operator
-* [SingleObserverExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/SingleObserverExampleActivity.java) - Using `SingleObserver`
-* [CompletableObserverActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/CompletableObserverActivity.java) - Using `CompletableObserver`
-* [MapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/MapExampleActivity.java) - Using `map` Operator
-* [ZipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ZipExampleActivity.java) - Using `zip` Operator
-* [BufferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/BufferExampleActivity.java) - Using `buffer` Operator
-* [TakeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/TakeExampleActivity.java) - Using `take` Operator
-* [ReduceExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ReduceExampleActivity.java) - Using `reduce` Operator
-* [FilterExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/FilterExampleActivity.java) - Using `filter` Operator
-* [SkipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/SkipExampleActivity.java) - Using `skip` Operator
-* [ReplayExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ReplayExampleActivity.java) - Using `replay` Operator
-* [ConcatExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ConcatExampleActivity.java) - Using `concat` Operator
-* [MergeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/MergeExampleActivity.java) - Using `merge` Operator
-* [DeferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/DeferExampleActivity.java) - Using `defer` Observable
-* [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/IntervalExampleActivity.java) - Using `Interval`
+* [DisposableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java) - Using `CompositeDisposable`
+* [FlowableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java) - Using `Flowable` and `reduce` operator
+* [SingleObserverExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java) - Using `SingleObserver`
+* [CompletableObserverActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverActivity.java) - Using `CompletableObserver`
+* [MapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java) - Using `map` Operator
+* [ZipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java) - Using `zip` Operator
+* [BufferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java) - Using `buffer` Operator
+* [TakeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java) - Using `take` Operator
+* [ReduceExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java) - Using `reduce` Operator
+* [FilterExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java) - Using `filter` Operator
+* [SkipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java) - Using `skip` Operator
+* [ReplayExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java) - Using `replay` Operator
+* [ConcatExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java) - Using `concat` Operator
+* [MergeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java) - Using `merge` Operator
+* [DeferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java) - Using `defer` Observable
+* [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java) - Using `Interval`
 
 ### TODO 
 

From 31e28bd99d043ab8924ac7833146cbb0e9acdcdb Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sun, 22 Jan 2017 13:02:13 +0530
Subject: [PATCH 035/137] Update REAME.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 7e8b484..114898d 100644
--- a/README.md
+++ b/README.md
@@ -78,7 +78,7 @@ RxJava1 -> RxJava2
 * [DisposableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java) - Using `CompositeDisposable`
 * [FlowableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java) - Using `Flowable` and `reduce` operator
 * [SingleObserverExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java) - Using `SingleObserver`
-* [CompletableObserverActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverActivity.java) - Using `CompletableObserver`
+* [CompletableObserverActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java) - Using `CompletableObserver`
 * [MapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java) - Using `map` Operator
 * [ZipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java) - Using `zip` Operator
 * [BufferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java) - Using `buffer` Operator

From 163ffeeac3a2ee034f0d1693ab84c2cc6839d992 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 23 Jan 2017 08:41:20 +0530
Subject: [PATCH 036/137] Add Base Activity

---
 ...Activity.java => ExampleBaseActivity.java} | 36 +++++++++----------
 .../AsyncSubjectExampleActivity.java          |  4 +--
 .../BehaviorSubjectExampleActivity.java       |  4 +--
 .../operators/BufferExampleActivity.java      |  4 +--
 .../CompletableObserverExampleActivity.java   |  4 +--
 .../operators/ConcatExampleActivity.java      |  4 +--
 .../operators/DebounceExampleActivity.java    |  4 +--
 .../operators/DeferExampleActivity.java       |  4 +--
 .../operators/DisposableExampleActivity.java  |  4 +--
 .../operators/DistinctExampleActivity.java    |  4 +--
 .../operators/FilterExampleActivity.java      |  4 +--
 .../operators/FlowableExampleActivity.java    |  4 +--
 .../operators/IntervalExampleActivity.java    |  4 +--
 .../LastOperatorExampleActivity.java          |  4 +--
 .../samples/operators/MapExampleActivity.java |  4 +--
 .../operators/MergeExampleActivity.java       |  4 +--
 .../PublishSubjectExampleActivity.java        |  4 +--
 .../operators/ReduceExampleActivity.java      |  4 +--
 .../operators/ReplayExampleActivity.java      |  4 +--
 .../ReplaySubjectExampleActivity.java         |  4 +--
 .../operators/ScanExampleActivity.java        |  4 +--
 .../operators/SimpleExampleActivity.java      |  4 +--
 .../SingleObserverExampleActivity.java        |  4 +--
 .../operators/SkipExampleActivity.java        |  4 +--
 .../operators/TakeExampleActivity.java        |  4 +--
 .../ThrottleFirstExampleActivity.java         |  4 +--
 .../ThrottleLastExampleActivity.java          |  4 +--
 .../operators/TimerExampleActivity.java       |  4 +--
 .../operators/WindowExampleActivity.java      |  2 +-
 .../samples/operators/ZipExampleActivity.java |  4 +--
 30 files changed, 75 insertions(+), 75 deletions(-)
 rename app/src/main/java/com/rxjava2/android/samples/{AbsExampleActivity.java => ExampleBaseActivity.java} (81%)

diff --git a/app/src/main/java/com/rxjava2/android/samples/AbsExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ExampleBaseActivity.java
similarity index 81%
rename from app/src/main/java/com/rxjava2/android/samples/AbsExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ExampleBaseActivity.java
index d0704d9..125f589 100644
--- a/app/src/main/java/com/rxjava2/android/samples/AbsExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ExampleBaseActivity.java
@@ -22,7 +22,7 @@
  * Created by threshold on 2017/1/11.
  */
 
-public abstract class AbsExampleActivity extends AppCompatActivity {
+public abstract class ExampleBaseActivity extends AppCompatActivity {
 
     protected String TAG = getClass().getSimpleName();
     protected Button btn;
@@ -56,22 +56,22 @@ protected <T> Observer<T> getObserver(final Object theNumberOfObserver) {
 
             @Override
             public void onSubscribe(Disposable d) {
-                AbsExampleActivity.this.onSubscribe(theNumberOfObserver,d);
+                ExampleBaseActivity.this.onSubscribe(theNumberOfObserver,d);
             }
 
             @Override
             public void onNext(T value) {
-                AbsExampleActivity.this.onNext(theNumberOfObserver,value);
+                ExampleBaseActivity.this.onNext(theNumberOfObserver,value);
             }
 
             @Override
             public void onError(Throwable e) {
-                AbsExampleActivity.this.onError(theNumberOfObserver,e);
+                ExampleBaseActivity.this.onError(theNumberOfObserver,e);
             }
 
             @Override
             public void onComplete() {
-                AbsExampleActivity.this.onComplete(theNumberOfObserver);
+                ExampleBaseActivity.this.onComplete(theNumberOfObserver);
             }
         };
     }
@@ -84,17 +84,17 @@ protected CompletableObserver getCompletableObserver(final Object theNumberOfObs
         return new CompletableObserver() {
             @Override
             public void onSubscribe(Disposable d) {
-                AbsExampleActivity.this.onSubscribe(theNumberOfObserver, d);
+                ExampleBaseActivity.this.onSubscribe(theNumberOfObserver, d);
             }
 
             @Override
             public void onComplete() {
-                AbsExampleActivity.this.onComplete(theNumberOfObserver);
+                ExampleBaseActivity.this.onComplete(theNumberOfObserver);
             }
 
             @Override
             public void onError(Throwable e) {
-                AbsExampleActivity.this.onError(theNumberOfObserver, e);
+                ExampleBaseActivity.this.onError(theNumberOfObserver, e);
             }
         };
     }
@@ -107,17 +107,17 @@ protected <T> DisposableObserver<T> getDisposableObserver(final Object theNumber
         return new DisposableObserver<T>() {
             @Override
             public void onNext(T t) {
-                AbsExampleActivity.this.onNext(theNumberOfObserver, t);
+                ExampleBaseActivity.this.onNext(theNumberOfObserver, t);
             }
 
             @Override
             public void onError(Throwable e) {
-                AbsExampleActivity.this.onError(theNumberOfObserver, e);
+                ExampleBaseActivity.this.onError(theNumberOfObserver, e);
             }
 
             @Override
             public void onComplete() {
-                AbsExampleActivity.this.onComplete(theNumberOfObserver);
+                ExampleBaseActivity.this.onComplete(theNumberOfObserver);
             }
         };
     }
@@ -130,17 +130,17 @@ protected <T> SingleObserver<T> getSingleObserver(final Object theNumberOfObserv
         return new SingleObserver<T>() {
             @Override
             public void onSubscribe(Disposable d) {
-                AbsExampleActivity.this.onSubscribe(theNumberOfObserver, d);
+                ExampleBaseActivity.this.onSubscribe(theNumberOfObserver, d);
             }
 
             @Override
             public void onSuccess(T t) {
-                AbsExampleActivity.this.onNext(theNumberOfObserver, t);
+                ExampleBaseActivity.this.onNext(theNumberOfObserver, t);
             }
 
             @Override
             public void onError(Throwable e) {
-                AbsExampleActivity.this.onError(theNumberOfObserver, e);
+                ExampleBaseActivity.this.onError(theNumberOfObserver, e);
             }
         };
     }
@@ -153,22 +153,22 @@ protected <T> MaybeObserver<T> getMaybeObserver(final Object theNumberOfObserver
         return new MaybeObserver<T>() {
             @Override
             public void onSubscribe(Disposable d) {
-                AbsExampleActivity.this.onSubscribe(theNumberOfObserver, d);
+                ExampleBaseActivity.this.onSubscribe(theNumberOfObserver, d);
             }
 
             @Override
             public void onSuccess(T t) {
-                AbsExampleActivity.this.onSuccess(theNumberOfObserver, t);
+                ExampleBaseActivity.this.onSuccess(theNumberOfObserver, t);
             }
 
             @Override
             public void onError(Throwable e) {
-                AbsExampleActivity.this.onError(theNumberOfObserver, e);
+                ExampleBaseActivity.this.onError(theNumberOfObserver, e);
             }
 
             @Override
             public void onComplete() {
-                AbsExampleActivity.this.onComplete(theNumberOfObserver);
+                ExampleBaseActivity.this.onComplete(theNumberOfObserver);
             }
         };
     }
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/AsyncSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/AsyncSubjectExampleActivity.java
index f6f6f47..b522d47 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/AsyncSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/AsyncSubjectExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.subjects.AsyncSubject;
 
@@ -8,7 +8,7 @@
  * Created by amitshekhar on 17/12/16.
  */
 
-public class AsyncSubjectExampleActivity extends AbsExampleActivity {
+public class AsyncSubjectExampleActivity extends ExampleBaseActivity {
 
     /* An AsyncSubject emits the last value (and only the last value) emitted by the source
      * Observable, and only after that source Observable completes. (If the source Observable
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/BehaviorSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/BehaviorSubjectExampleActivity.java
index ba86805..dbb6611 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/BehaviorSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/BehaviorSubjectExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.subjects.BehaviorSubject;
 
@@ -8,7 +8,7 @@
  * Created by amitshekhar on 17/12/16.
  */
 
-public class BehaviorSubjectExampleActivity extends AbsExampleActivity {
+public class BehaviorSubjectExampleActivity extends ExampleBaseActivity {
 
     /* When an observer subscribes to a BehaviorSubject, it begins by emitting the item most
      * recently emitted by the source Observable (or a seed/default value if none has yet been
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java
index e65479e..ab29132 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java
@@ -1,13 +1,13 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class BufferExampleActivity extends AbsExampleActivity {
+public class BufferExampleActivity extends ExampleBaseActivity {
 
     /*
      * simple example using buffer operator - bundles all emitted values into a list
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java
index 6a03e0d..bc9f2e1 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import java.util.Random;
 
@@ -13,7 +13,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class CompletableObserverExampleActivity extends AbsExampleActivity {
+public class CompletableObserverExampleActivity extends ExampleBaseActivity {
 
     /*
      * simple example using CompletableObserver
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java
index da35280..7f6f084 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java
@@ -1,13 +1,13 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class ConcatExampleActivity extends AbsExampleActivity {
+public class ConcatExampleActivity extends ExampleBaseActivity {
 
     private static final String TAG = ConcatExampleActivity.class.getSimpleName();
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/DebounceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/DebounceExampleActivity.java
index 3ea8656..4847d04 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/DebounceExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/DebounceExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import java.util.concurrent.TimeUnit;
 
@@ -14,7 +14,7 @@
  * Created by amitshekhar on 22/12/16.
  */
 
-public class DebounceExampleActivity extends AbsExampleActivity {
+public class DebounceExampleActivity extends ExampleBaseActivity {
 
     private static final String TAG = DebounceExampleActivity.class.getSimpleName();
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java
index dbdf465..dabda5b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 import com.rxjava2.android.samples.model.Car;
 
 import io.reactivex.Observable;
@@ -8,7 +8,7 @@
 /**
  * Created by amitshekhar on 30/08/16.
  */
-public class DeferExampleActivity extends AbsExampleActivity {
+public class DeferExampleActivity extends ExampleBaseActivity {
 
     /*
      * Defer used for Deferring Observable code until subscription in RxJava
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java
index 2846f8f..c5b3bc5 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java
@@ -2,7 +2,7 @@
 
 import android.os.SystemClock;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import java.util.concurrent.Callable;
 
@@ -15,7 +15,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class DisposableExampleActivity extends AbsExampleActivity {
+public class DisposableExampleActivity extends ExampleBaseActivity {
 
     private final CompositeDisposable disposables = new CompositeDisposable();
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/DistinctExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/DistinctExampleActivity.java
index 62f70bd..7f1ff2b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/DistinctExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/DistinctExampleActivity.java
@@ -1,13 +1,13 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 
 /**
  * Created by techteam on 13/09/16.
  */
-public class DistinctExampleActivity extends AbsExampleActivity {
+public class DistinctExampleActivity extends ExampleBaseActivity {
 
   protected void doSomeWork(){
      getObservable().distinct() .subscribe(getObserver());
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java
index dc85561..36b1351 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 import io.reactivex.functions.Predicate;
@@ -8,7 +8,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class FilterExampleActivity extends AbsExampleActivity {
+public class FilterExampleActivity extends ExampleBaseActivity {
 
     /*
      * simple example by using filter operator to emit only even value
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java
index f1308ea..51ad631 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import org.reactivestreams.Subscriber;
 import org.reactivestreams.Subscription;
@@ -12,7 +12,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class FlowableExampleActivity extends AbsExampleActivity {
+public class FlowableExampleActivity extends ExampleBaseActivity {
 
     private Subscription mSubscription;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java
index 5c2bc7c..e0c4fd6 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import java.util.concurrent.TimeUnit;
 
@@ -12,7 +12,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class IntervalExampleActivity extends AbsExampleActivity {
+public class IntervalExampleActivity extends ExampleBaseActivity {
 
     private final CompositeDisposable disposables = new CompositeDisposable();
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/LastOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/LastOperatorExampleActivity.java
index abc2fe9..07d504c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/LastOperatorExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/LastOperatorExampleActivity.java
@@ -1,13 +1,13 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 
 /**
  * Created by techteam on 13/09/16.
  */
-public class LastOperatorExampleActivity extends AbsExampleActivity {
+public class LastOperatorExampleActivity extends ExampleBaseActivity {
 
     protected void doSomeWork() {
         getObservable().last("ADefault") // the default item ("ADefault") to emit if the source ObservableSource is empty
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java
index 9d9eb0e..5a543c1 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 import com.rxjava2.android.samples.model.ApiUser;
 import com.rxjava2.android.samples.model.User;
 import com.rxjava2.android.samples.utils.Utils;
@@ -17,7 +17,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class MapExampleActivity extends AbsExampleActivity {
+public class MapExampleActivity extends ExampleBaseActivity {
 
     /*
     * Here we are getting ApiUser Object from api server
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java
index e75effe..239651d 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java
@@ -1,13 +1,13 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 
 /**
  * Created by amitshekhar on 28/08/16.
  */
-public class MergeExampleActivity extends AbsExampleActivity {
+public class MergeExampleActivity extends ExampleBaseActivity {
     /*
      * Using merge operator to combine Observable : merge does not maintain
      * the order of Observable.
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/PublishSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/PublishSubjectExampleActivity.java
index 83c3a09..d4b168a 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/PublishSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/PublishSubjectExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.subjects.PublishSubject;
 
@@ -8,7 +8,7 @@
  * Created by amitshekhar on 17/12/16.
  */
 
-public class PublishSubjectExampleActivity extends AbsExampleActivity {
+public class PublishSubjectExampleActivity extends ExampleBaseActivity {
 
     /* PublishSubject emits to an observer only those items that are emitted
      * by the source Observable, subsequent to the time of the subscription.
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java
index 6c1fa8c..d5be403 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 import io.reactivex.functions.BiFunction;
@@ -8,7 +8,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class ReduceExampleActivity extends AbsExampleActivity {
+public class ReduceExampleActivity extends ExampleBaseActivity {
     /*
      * simple example using reduce to add all the number
      */
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java
index 3d3e4f7..485a526 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.observables.ConnectableObservable;
 import io.reactivex.subjects.PublishSubject;
@@ -8,7 +8,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class ReplayExampleActivity extends AbsExampleActivity {
+public class ReplayExampleActivity extends ExampleBaseActivity {
 
     /* Using replay operator, replay ensure that all observers see the same sequence
      * of emitted items, even if they subscribe after the Observable has begun emitting items
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ReplaySubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ReplaySubjectExampleActivity.java
index 484b7e8..292394c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ReplaySubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ReplaySubjectExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.subjects.ReplaySubject;
 
@@ -8,7 +8,7 @@
  * Created by amitshekhar on 17/12/16.
  */
 
-public class ReplaySubjectExampleActivity extends AbsExampleActivity {
+public class ReplaySubjectExampleActivity extends ExampleBaseActivity {
 
     /* ReplaySubject emits to any observer all of the items that were emitted
      * by the source Observable, regardless of when the observer subscribes.
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ScanExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ScanExampleActivity.java
index e9ee9dd..3c101dd 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ScanExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ScanExampleActivity.java
@@ -1,13 +1,13 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.functions.BiFunction;
 import io.reactivex.schedulers.Schedulers;
 
-public class ScanExampleActivity extends AbsExampleActivity {
+public class ScanExampleActivity extends ExampleBaseActivity {
 
     /* Using scan operator, it sends also the previous result */
     protected void doSomeWork() {
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/SimpleExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/SimpleExampleActivity.java
index c6168ce..c889943 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/SimpleExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/SimpleExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -9,7 +9,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class SimpleExampleActivity extends AbsExampleActivity {
+public class SimpleExampleActivity extends ExampleBaseActivity {
 
     /*
      * simple example to emit two value one by one
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java
index 87b11b3..7243ce0 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java
@@ -2,7 +2,7 @@
 
 import android.util.Log;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.Single;
 import io.reactivex.SingleEmitter;
@@ -13,7 +13,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class SingleObserverExampleActivity extends AbsExampleActivity {
+public class SingleObserverExampleActivity extends ExampleBaseActivity {
 
     /*
      * simple example using SingleObserver
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java
index aecedc2..e5e1c70 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -9,7 +9,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class SkipExampleActivity extends AbsExampleActivity {
+public class SkipExampleActivity extends ExampleBaseActivity {
 
     /* Using skip operator, it only not emit
     * the first 2 values.
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java
index 168de2d..d278c54 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -9,7 +9,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class TakeExampleActivity extends AbsExampleActivity {
+public class TakeExampleActivity extends ExampleBaseActivity {
 
     /*
     * Using take operator, it only emits
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleFirstExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleFirstExampleActivity.java
index bc05cb1..3f3d74c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleFirstExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleFirstExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import java.util.concurrent.TimeUnit;
 
@@ -15,7 +15,7 @@
  * Created by threshold on 2017/1/11.
  */
 
-public class ThrottleFirstExampleActivity extends AbsExampleActivity {
+public class ThrottleFirstExampleActivity extends ExampleBaseActivity {
 
     protected void doSomeWork() {
         getObservable()
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleLastExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleLastExampleActivity.java
index 33f8ba9..1d0c1f0 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleLastExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleLastExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import java.util.concurrent.TimeUnit;
 
@@ -14,7 +14,7 @@
  * Created by amitshekhar on 22/12/16.
  */
 
-public class ThrottleLastExampleActivity extends AbsExampleActivity {
+public class ThrottleLastExampleActivity extends ExampleBaseActivity {
 
     /*
     * Using throttleLast() -> emit the most recent items emitted by an Observable within
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/TimerExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/TimerExampleActivity.java
index f4244ee..c123433 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/TimerExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/TimerExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 
 import java.util.concurrent.TimeUnit;
 
@@ -11,7 +11,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class TimerExampleActivity extends AbsExampleActivity {
+public class TimerExampleActivity extends ExampleBaseActivity {
 
     /*
      * simple example using timer to do something after 2 second
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/WindowExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/WindowExampleActivity.java
index 37592f2..b6b6b7e 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/WindowExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/WindowExampleActivity.java
@@ -1 +1 @@
-package com.rxjava2.android.samples.operators;

import android.util.Log;

import com.rxjava2.android.samples.AbsExampleActivity;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends AbsExampleActivity {

    /*
     * Sample of using window
     */
    protected void doSomeWork() {
//        Observable.create(new ObservableOnSubscribe<Long>() {
//            @Override
//            public void subscribe(ObservableEmitter<Long> e) throws Exception {
//                //e.onNext(-1L); //在这里发射一个就相当于0秒也发射了一个数据
//                for (int i =0 ;i<12;i++) {
//                    Thread.sleep(1000);
//                    e.onNext((long)i);
//                    Log.d(TAG, "e.onNext:" + i);
//                }
//                e.onComplete();
//            }
//        })
        Observable.interval(1,TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<Observable<Long>>() {
                    @Override
                    public void accept(Observable<Long> observable) {
                        Log.d(TAG, "Sub Divide begin....");
                        textView.append("Sub Divide begin ....");
                        textView.append(AppConstant.LINE_SEPARATOR);
                        observable
                                .subscribeOn(Schedulers.io())
                                .observeOn(AndroidSchedulers.mainThread())
                                .subscribe(new Consumer<Long>() {
                            @Override
                            public void accept(Long aLong) {
                                Log.d(TAG, "Next:" + aLong);
                                textView.append("Next:" + aLong);
                                textView.append(AppConstant.LINE_SEPARATOR);
                            }
                        });
                    }
                });

        /*
        输出
        subdivide begin……
        Next:0
        Next:1
        subdivide begin……
        Next:2
        Next:3
        Next:4
        subdivide begin……
        Next:5
        Next:6
        Next:7
        subdivide begin……
        Next:8
        Next:9
        Next:10
        subdivide begin……
        Next:11

        为什么不是 0，1，2     3，4，5 ..... 这种形式呢。
        同学，问的非常好！！！
        因为0秒的时刻啥也没发射，1秒的时刻发射了0，2秒的时刻发射了1，3秒的时刻发射了2
        "对呀，前3秒嘛，因该0，1，2嘛"，但是3秒是指时间片段，[0,1) [1,2) [2,3) 左闭右开 这三秒只发射了0和1
         */
    }
}
\ No newline at end of file
+package com.rxjava2.android.samples.operators;

import android.util.Log;

import com.rxjava2.android.samples.ExampleBaseActivity;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends ExampleBaseActivity {

    /*
     * Sample of using window
     */
    protected void doSomeWork() {
//        Observable.create(new ObservableOnSubscribe<Long>() {
//            @Override
//            public void subscribe(ObservableEmitter<Long> e) throws Exception {
//                //e.onNext(-1L); //在这里发射一个就相当于0秒也发射了一个数据
//                for (int i =0 ;i<12;i++) {
//                    Thread.sleep(1000);
//                    e.onNext((long)i);
//                    Log.d(TAG, "e.onNext:" + i);
//                }
//                e.onComplete();
//            }
//        })
        Observable.interval(1,TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<Observable<Long>>() {
                    @Override
                    public void accept(Observable<Long> observable) {
                        Log.d(TAG, "Sub Divide begin....");
                        textView.append("Sub Divide begin ....");
                        textView.append(AppConstant.LINE_SEPARATOR);
                        observable
                                .subscribeOn(Schedulers.io())
                                .observeOn(AndroidSchedulers.mainThread())
                                .subscribe(new Consumer<Long>() {
                            @Override
                            public void accept(Long aLong) {
                                Log.d(TAG, "Next:" + aLong);
                                textView.append("Next:" + aLong);
                                textView.append(AppConstant.LINE_SEPARATOR);
                            }
                        });
                    }
                });

        /*
        输出
        subdivide begin……
        Next:0
        Next:1
        subdivide begin……
        Next:2
        Next:3
        Next:4
        subdivide begin……
        Next:5
        Next:6
        Next:7
        subdivide begin……
        Next:8
        Next:9
        Next:10
        subdivide begin……
        Next:11

        为什么不是 0，1，2     3，4，5 ..... 这种形式呢。
        同学，问的非常好！！！
        因为0秒的时刻啥也没发射，1秒的时刻发射了0，2秒的时刻发射了1，3秒的时刻发射了2
        "对呀，前3秒嘛，因该0，1，2嘛"，但是3秒是指时间片段，[0,1) [1,2) [2,3) 左闭右开 这三秒只发射了0和1
         */
    }
}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java
index 58e504a..f73bb68 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.operators;
 
-import com.rxjava2.android.samples.AbsExampleActivity;
+import com.rxjava2.android.samples.ExampleBaseActivity;
 import com.rxjava2.android.samples.model.User;
 import com.rxjava2.android.samples.utils.Utils;
 
@@ -16,7 +16,7 @@
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class ZipExampleActivity extends AbsExampleActivity {
+public class ZipExampleActivity extends ExampleBaseActivity {
     /*
     * Here we are getting two user list
     * One, the list of cricket fans

From ca20dbc9ae00b799d168219eae0ba1804ba39268 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 23 Jan 2017 08:48:52 +0530
Subject: [PATCH 037/137] Remove unused code

---
 app/src/main/AndroidManifest.xml              | 60 +++++++++---------
 .../android/samples/MyApplication.java        | 18 +-----
 .../operators/WindowExampleActivity.java      |  1 -
 .../samples/{ => ui}/ExampleBaseActivity.java |  3 +-
 .../samples/{ => ui}/MainActivity.java        | 61 ++++++++++---------
 .../AsyncSubjectExampleActivity.java          |  4 +-
 .../BehaviorSubjectExampleActivity.java       |  4 +-
 .../operators/BufferExampleActivity.java      |  4 +-
 .../CompletableObserverExampleActivity.java   |  4 +-
 .../operators/ConcatExampleActivity.java      |  4 +-
 .../operators/DebounceExampleActivity.java    |  4 +-
 .../operators/DeferExampleActivity.java       |  4 +-
 .../operators/DisposableExampleActivity.java  |  4 +-
 .../operators/DistinctExampleActivity.java    |  4 +-
 .../operators/FilterExampleActivity.java      |  4 +-
 .../operators/FlowableExampleActivity.java    |  4 +-
 .../operators/IntervalExampleActivity.java    |  4 +-
 .../LastOperatorExampleActivity.java          |  4 +-
 .../operators/MapExampleActivity.java         |  4 +-
 .../operators/MergeExampleActivity.java       |  4 +-
 .../PublishSubjectExampleActivity.java        |  4 +-
 .../operators/ReduceExampleActivity.java      |  4 +-
 .../operators/ReplayExampleActivity.java      |  4 +-
 .../ReplaySubjectExampleActivity.java         |  4 +-
 .../operators/ScanExampleActivity.java        |  4 +-
 .../operators/SimpleExampleActivity.java      |  4 +-
 .../SingleObserverExampleActivity.java        |  4 +-
 .../operators/SkipExampleActivity.java        |  4 +-
 .../operators/TakeExampleActivity.java        |  4 +-
 .../ThrottleFirstExampleActivity.java         |  4 +-
 .../ThrottleLastExampleActivity.java          |  4 +-
 .../operators/TimerExampleActivity.java       |  4 +-
 .../ui/operators/WindowExampleActivity.java   |  1 +
 .../operators/ZipExampleActivity.java         |  4 +-
 .../android/samples/utils/AppConstant.java    |  2 +
 .../rxjava2/android/samples/utils/Utils.java  | 12 ----
 app/src/main/res/layout/activity_main.xml     |  2 +-
 37 files changed, 126 insertions(+), 146 deletions(-)
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/operators/WindowExampleActivity.java
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/ExampleBaseActivity.java (98%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/MainActivity.java (67%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/AsyncSubjectExampleActivity.java (90%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/BehaviorSubjectExampleActivity.java (91%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/BufferExampleActivity.java (92%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/CompletableObserverExampleActivity.java (92%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/ConcatExampleActivity.java (89%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/DebounceExampleActivity.java (96%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/DeferExampleActivity.java (87%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/DisposableExampleActivity.java (93%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/DistinctExampleActivity.java (76%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/FilterExampleActivity.java (85%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/FlowableExampleActivity.java (96%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/IntervalExampleActivity.java (92%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/LastOperatorExampleActivity.java (84%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/MapExampleActivity.java (94%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/MergeExampleActivity.java (88%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/PublishSubjectExampleActivity.java (92%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/ReduceExampleActivity.java (87%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/ReplayExampleActivity.java (92%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/ReplaySubjectExampleActivity.java (93%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/ScanExampleActivity.java (92%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/SimpleExampleActivity.java (87%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/SingleObserverExampleActivity.java (93%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/SkipExampleActivity.java (87%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/TakeExampleActivity.java (87%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/ThrottleFirstExampleActivity.java (94%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/ThrottleLastExampleActivity.java (95%)
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/TimerExampleActivity.java (89%)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
 rename app/src/main/java/com/rxjava2/android/samples/{ => ui}/operators/ZipExampleActivity.java (95%)

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index af26764..1542126 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -9,7 +9,7 @@
         android:label="@string/app_name"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
+        <activity android:name=".ui.MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
 
@@ -17,89 +17,89 @@
             </intent-filter>
         </activity>
         <activity
-            android:name=".operators.SimpleExampleActivity"
+            android:name=".ui.operators.SimpleExampleActivity"
             android:label="@string/simple"/>
         <activity
-            android:name=".operators.MapExampleActivity"
+            android:name=".ui.operators.MapExampleActivity"
             android:label="@string/map"/>
         <activity
-            android:name=".operators.ZipExampleActivity"
+            android:name=".ui.operators.ZipExampleActivity"
             android:label="@string/zip"/>
         <activity
-            android:name=".operators.DisposableExampleActivity"
+            android:name=".ui.operators.DisposableExampleActivity"
             android:label="@string/disposable"/>
         <activity
-            android:name=".operators.TakeExampleActivity"
+            android:name=".ui.operators.TakeExampleActivity"
             android:label="@string/take"/>
         <activity
-            android:name=".operators.TimerExampleActivity"
+            android:name=".ui.operators.TimerExampleActivity"
             android:label="@string/timer"/>
         <activity
-            android:name=".operators.IntervalExampleActivity"
+            android:name=".ui.operators.IntervalExampleActivity"
             android:label="@string/interval"/>
         <activity
-            android:name=".operators.SingleObserverExampleActivity"
+            android:name=".ui.operators.SingleObserverExampleActivity"
             android:label="@string/SingleObserver"/>
         <activity
-            android:name=".operators.CompletableObserverExampleActivity"
+            android:name=".ui.operators.CompletableObserverExampleActivity"
             android:label="@string/CompletableObserver"/>
         <activity
-            android:name=".operators.FlowableExampleActivity"
+            android:name=".ui.operators.FlowableExampleActivity"
             android:label="@string/Flowable"/>
         <activity
-            android:name=".operators.ReduceExampleActivity"
+            android:name=".ui.operators.ReduceExampleActivity"
             android:label="@string/reduce"/>
         <activity
-            android:name=".operators.BufferExampleActivity"
+            android:name=".ui.operators.BufferExampleActivity"
             android:label="@string/buffer"/>
         <activity
-            android:name=".operators.FilterExampleActivity"
+            android:name=".ui.operators.FilterExampleActivity"
             android:label="@string/filter"/>
         <activity
-            android:name=".operators.SkipExampleActivity"
+            android:name=".ui.operators.SkipExampleActivity"
             android:label="@string/skip"/>
         <activity
-            android:name=".operators.ScanExampleActivity"
+            android:name=".ui.operators.ScanExampleActivity"
             android:label="@string/scan"/>
         <activity
-            android:name=".operators.ReplayExampleActivity"
+            android:name=".ui.operators.ReplayExampleActivity"
             android:label="@string/replay"/>
         <activity
-            android:name=".operators.ConcatExampleActivity"
+            android:name=".ui.operators.ConcatExampleActivity"
             android:label="@string/concat"/>
         <activity
-            android:name=".operators.MergeExampleActivity"
+            android:name=".ui.operators.MergeExampleActivity"
             android:label="@string/merge"/>
         <activity
-            android:name=".operators.DeferExampleActivity"
+            android:name=".ui.operators.DeferExampleActivity"
             android:label="@string/defer"/>
         <activity
-            android:name=".operators.DistinctExampleActivity"
+            android:name=".ui.operators.DistinctExampleActivity"
             android:label="@string/distinct"/>
         <activity
-            android:name=".operators.LastOperatorExampleActivity"
+            android:name=".ui.operators.LastOperatorExampleActivity"
             android:label="@string/distinct"/>
         <activity
-            android:name=".operators.ReplaySubjectExampleActivity"
+            android:name=".ui.operators.ReplaySubjectExampleActivity"
             android:label="@string/replay_subject"/>
         <activity
-            android:name=".operators.PublishSubjectExampleActivity"
+            android:name=".ui.operators.PublishSubjectExampleActivity"
             android:label="@string/publish_subject"/>
         <activity
-            android:name=".operators.BehaviorSubjectExampleActivity"
+            android:name=".ui.operators.BehaviorSubjectExampleActivity"
             android:label="@string/behavior_subject"/>
         <activity
-            android:name=".operators.AsyncSubjectExampleActivity"
+            android:name=".ui.operators.AsyncSubjectExampleActivity"
             android:label="@string/async_subject"/>
         <activity
-            android:name=".operators.ThrottleLastExampleActivity"
+            android:name=".ui.operators.ThrottleLastExampleActivity"
             android:label="@string/throttle_last"/>
         <activity
-            android:name=".operators.DebounceExampleActivity"
+            android:name=".ui.operators.DebounceExampleActivity"
             android:label="@string/debounce"/>
-        <activity android:name=".operators.WindowExampleActivity"
+        <activity android:name=".ui.operators.WindowExampleActivity"
             android:label="@string/window"/>
-        <activity android:name=".operators.ThrottleFirstExampleActivity"
+        <activity android:name=".ui.operators.ThrottleFirstExampleActivity"
                   android:label="@string/throttle_first"/>
     </application>
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/MyApplication.java b/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
index c2aac36..b5c7649 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
@@ -1,11 +1,6 @@
 package com.rxjava2.android.samples;
 
 import android.app.Application;
-import android.os.Build;
-import android.util.Log;
-
-import io.reactivex.Observable;
-import io.reactivex.functions.Consumer;
 
 /**
  * Created by threshold on 2017/1/12.
@@ -13,18 +8,11 @@
 
 public class MyApplication extends Application {
 
+    public static final String TAG = MyApplication.class.getSimpleName();
+
     @Override
     public void onCreate() {
         super.onCreate();
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-            Log.d("MyApplication","isArm64:" + (Build.SUPPORTED_64_BIT_ABIS.length > 0));
-            Observable.fromArray(Build.SUPPORTED_64_BIT_ABIS)
-                    .forEach(new Consumer<String>() {
-                        @Override
-                        public void accept(String s) throws Exception {
-                            Log.d("MyApplication", s);
-                        }
-                    });
-        }
     }
+
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/WindowExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/operators/WindowExampleActivity.java
deleted file mode 100644
index b6b6b7e..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/operators/WindowExampleActivity.java
+++ /dev/null
@@ -1 +0,0 @@
-package com.rxjava2.android.samples.operators;

import android.util.Log;

import com.rxjava2.android.samples.ExampleBaseActivity;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends ExampleBaseActivity {

    /*
     * Sample of using window
     */
    protected void doSomeWork() {
//        Observable.create(new ObservableOnSubscribe<Long>() {
//            @Override
//            public void subscribe(ObservableEmitter<Long> e) throws Exception {
//                //e.onNext(-1L); //在这里发射一个就相当于0秒也发射了一个数据
//                for (int i =0 ;i<12;i++) {
//                    Thread.sleep(1000);
//                    e.onNext((long)i);
//                    Log.d(TAG, "e.onNext:" + i);
//                }
//                e.onComplete();
//            }
//        })
        Observable.interval(1,TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<Observable<Long>>() {
                    @Override
                    public void accept(Observable<Long> observable) {
                        Log.d(TAG, "Sub Divide begin....");
                        textView.append("Sub Divide begin ....");
                        textView.append(AppConstant.LINE_SEPARATOR);
                        observable
                                .subscribeOn(Schedulers.io())
                                .observeOn(AndroidSchedulers.mainThread())
                                .subscribe(new Consumer<Long>() {
                            @Override
                            public void accept(Long aLong) {
                                Log.d(TAG, "Next:" + aLong);
                                textView.append("Next:" + aLong);
                                textView.append(AppConstant.LINE_SEPARATOR);
                            }
                        });
                    }
                });

        /*
        输出
        subdivide begin……
        Next:0
        Next:1
        subdivide begin……
        Next:2
        Next:3
        Next:4
        subdivide begin……
        Next:5
        Next:6
        Next:7
        subdivide begin……
        Next:8
        Next:9
        Next:10
        subdivide begin……
        Next:11

        为什么不是 0，1，2     3，4，5 ..... 这种形式呢。
        同学，问的非常好！！！
        因为0秒的时刻啥也没发射，1秒的时刻发射了0，2秒的时刻发射了1，3秒的时刻发射了2
        "对呀，前3秒嘛，因该0，1，2嘛"，但是3秒是指时间片段，[0,1) [1,2) [2,3) 左闭右开 这三秒只发射了0和1
         */
    }
}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ExampleBaseActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/ExampleBaseActivity.java
similarity index 98%
rename from app/src/main/java/com/rxjava2/android/samples/ExampleBaseActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/ExampleBaseActivity.java
index 125f589..5a6b84f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ExampleBaseActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/ExampleBaseActivity.java
@@ -1,4 +1,4 @@
-package com.rxjava2.android.samples;
+package com.rxjava2.android.samples.ui;
 
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
@@ -7,6 +7,7 @@
 import android.widget.Button;
 import android.widget.TextView;
 
+import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
 import java.util.List;
diff --git a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/MainActivity.java
similarity index 67%
rename from app/src/main/java/com/rxjava2/android/samples/MainActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/MainActivity.java
index 50ba052..00f7352 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MainActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/MainActivity.java
@@ -1,39 +1,40 @@
-package com.rxjava2.android.samples;
+package com.rxjava2.android.samples.ui;
 
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 
-import com.rxjava2.android.samples.operators.AsyncSubjectExampleActivity;
-import com.rxjava2.android.samples.operators.BehaviorSubjectExampleActivity;
-import com.rxjava2.android.samples.operators.BufferExampleActivity;
-import com.rxjava2.android.samples.operators.CompletableObserverExampleActivity;
-import com.rxjava2.android.samples.operators.ConcatExampleActivity;
-import com.rxjava2.android.samples.operators.DebounceExampleActivity;
-import com.rxjava2.android.samples.operators.DeferExampleActivity;
-import com.rxjava2.android.samples.operators.DisposableExampleActivity;
-import com.rxjava2.android.samples.operators.DistinctExampleActivity;
-import com.rxjava2.android.samples.operators.FilterExampleActivity;
-import com.rxjava2.android.samples.operators.FlowableExampleActivity;
-import com.rxjava2.android.samples.operators.IntervalExampleActivity;
-import com.rxjava2.android.samples.operators.LastOperatorExampleActivity;
-import com.rxjava2.android.samples.operators.MapExampleActivity;
-import com.rxjava2.android.samples.operators.MergeExampleActivity;
-import com.rxjava2.android.samples.operators.PublishSubjectExampleActivity;
-import com.rxjava2.android.samples.operators.ReduceExampleActivity;
-import com.rxjava2.android.samples.operators.ReplayExampleActivity;
-import com.rxjava2.android.samples.operators.ReplaySubjectExampleActivity;
-import com.rxjava2.android.samples.operators.ScanExampleActivity;
-import com.rxjava2.android.samples.operators.SimpleExampleActivity;
-import com.rxjava2.android.samples.operators.SingleObserverExampleActivity;
-import com.rxjava2.android.samples.operators.SkipExampleActivity;
-import com.rxjava2.android.samples.operators.TakeExampleActivity;
-import com.rxjava2.android.samples.operators.ThrottleFirstExampleActivity;
-import com.rxjava2.android.samples.operators.ThrottleLastExampleActivity;
-import com.rxjava2.android.samples.operators.TimerExampleActivity;
-import com.rxjava2.android.samples.operators.WindowExampleActivity;
-import com.rxjava2.android.samples.operators.ZipExampleActivity;
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.ui.operators.AsyncSubjectExampleActivity;
+import com.rxjava2.android.samples.ui.operators.BehaviorSubjectExampleActivity;
+import com.rxjava2.android.samples.ui.operators.BufferExampleActivity;
+import com.rxjava2.android.samples.ui.operators.CompletableObserverExampleActivity;
+import com.rxjava2.android.samples.ui.operators.ConcatExampleActivity;
+import com.rxjava2.android.samples.ui.operators.DebounceExampleActivity;
+import com.rxjava2.android.samples.ui.operators.DeferExampleActivity;
+import com.rxjava2.android.samples.ui.operators.DisposableExampleActivity;
+import com.rxjava2.android.samples.ui.operators.DistinctExampleActivity;
+import com.rxjava2.android.samples.ui.operators.FilterExampleActivity;
+import com.rxjava2.android.samples.ui.operators.FlowableExampleActivity;
+import com.rxjava2.android.samples.ui.operators.IntervalExampleActivity;
+import com.rxjava2.android.samples.ui.operators.LastOperatorExampleActivity;
+import com.rxjava2.android.samples.ui.operators.MapExampleActivity;
+import com.rxjava2.android.samples.ui.operators.MergeExampleActivity;
+import com.rxjava2.android.samples.ui.operators.PublishSubjectExampleActivity;
+import com.rxjava2.android.samples.ui.operators.ReduceExampleActivity;
+import com.rxjava2.android.samples.ui.operators.ReplayExampleActivity;
+import com.rxjava2.android.samples.ui.operators.ReplaySubjectExampleActivity;
+import com.rxjava2.android.samples.ui.operators.ScanExampleActivity;
+import com.rxjava2.android.samples.ui.operators.SimpleExampleActivity;
+import com.rxjava2.android.samples.ui.operators.SingleObserverExampleActivity;
+import com.rxjava2.android.samples.ui.operators.SkipExampleActivity;
+import com.rxjava2.android.samples.ui.operators.TakeExampleActivity;
+import com.rxjava2.android.samples.ui.operators.ThrottleFirstExampleActivity;
+import com.rxjava2.android.samples.ui.operators.ThrottleLastExampleActivity;
+import com.rxjava2.android.samples.ui.operators.TimerExampleActivity;
+import com.rxjava2.android.samples.ui.operators.WindowExampleActivity;
+import com.rxjava2.android.samples.ui.operators.ZipExampleActivity;
 
 public class MainActivity extends AppCompatActivity {
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/AsyncSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
similarity index 90%
rename from app/src/main/java/com/rxjava2/android/samples/operators/AsyncSubjectExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
index b522d47..8fb9b17 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/AsyncSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.subjects.AsyncSubject;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/BehaviorSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
similarity index 91%
rename from app/src/main/java/com/rxjava2/android/samples/operators/BehaviorSubjectExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
index dbb6611..0d8d585 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/BehaviorSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.subjects.BehaviorSubject;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
similarity index 92%
rename from app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
index ab29132..d5bc50f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
similarity index 92%
rename from app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
index bc9f2e1..afaf174 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import java.util.Random;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
similarity index 89%
rename from app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
index 7f6f084..5bc8d96 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/DebounceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
similarity index 96%
rename from app/src/main/java/com/rxjava2/android/samples/operators/DebounceExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
index 4847d04..7c9315b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/DebounceExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import java.util.concurrent.TimeUnit;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
similarity index 87%
rename from app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
index dabda5b..9195a92 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 import com.rxjava2.android.samples.model.Car;
 
 import io.reactivex.Observable;
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java
similarity index 93%
rename from app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java
index c5b3bc5..134d562 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java
@@ -1,8 +1,8 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
 import android.os.SystemClock;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import java.util.concurrent.Callable;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/DistinctExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
similarity index 76%
rename from app/src/main/java/com/rxjava2/android/samples/operators/DistinctExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
index 7f1ff2b..555685f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/DistinctExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java
similarity index 85%
rename from app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java
index 36b1351..6777e4e 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 import io.reactivex.functions.Predicate;
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
similarity index 96%
rename from app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
index 51ad631..fd9e261 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import org.reactivestreams.Subscriber;
 import org.reactivestreams.Subscription;
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
similarity index 92%
rename from app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
index e0c4fd6..77fb1ec 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import java.util.concurrent.TimeUnit;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/LastOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
similarity index 84%
rename from app/src/main/java/com/rxjava2/android/samples/operators/LastOperatorExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
index 07d504c..b019b5f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/LastOperatorExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
similarity index 94%
rename from app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
index 5a543c1..ccecb7f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 import com.rxjava2.android.samples.model.ApiUser;
 import com.rxjava2.android.samples.model.User;
 import com.rxjava2.android.samples.utils.Utils;
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java
similarity index 88%
rename from app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java
index 239651d..0ef4fe2 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/PublishSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
similarity index 92%
rename from app/src/main/java/com/rxjava2/android/samples/operators/PublishSubjectExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
index d4b168a..0eaabec 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/PublishSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.subjects.PublishSubject;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java
similarity index 87%
rename from app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java
index d5be403..0722028 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 import io.reactivex.functions.BiFunction;
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
similarity index 92%
rename from app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
index 485a526..60c4651 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.observables.ConnectableObservable;
 import io.reactivex.subjects.PublishSubject;
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ReplaySubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
similarity index 93%
rename from app/src/main/java/com/rxjava2/android/samples/operators/ReplaySubjectExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
index 292394c..63e4db0 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ReplaySubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.subjects.ReplaySubject;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ScanExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
similarity index 92%
rename from app/src/main/java/com/rxjava2/android/samples/operators/ScanExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
index 3c101dd..0397968 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ScanExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/SimpleExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java
similarity index 87%
rename from app/src/main/java/com/rxjava2/android/samples/operators/SimpleExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java
index c889943..694c858 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/SimpleExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
similarity index 93%
rename from app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
index 7243ce0..fd1b402 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
@@ -1,8 +1,8 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
 import android.util.Log;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Single;
 import io.reactivex.SingleEmitter;
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
similarity index 87%
rename from app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
index e5e1c70..de1cf11 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java
similarity index 87%
rename from app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java
index d278c54..651b2c2 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleFirstExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
similarity index 94%
rename from app/src/main/java/com/rxjava2/android/samples/operators/ThrottleFirstExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
index 3f3d74c..1872a64 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleFirstExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import java.util.concurrent.TimeUnit;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleLastExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
similarity index 95%
rename from app/src/main/java/com/rxjava2/android/samples/operators/ThrottleLastExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
index 1d0c1f0..e2689b3 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ThrottleLastExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import java.util.concurrent.TimeUnit;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/TimerExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java
similarity index 89%
rename from app/src/main/java/com/rxjava2/android/samples/operators/TimerExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java
index c123433..13a3b51 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/TimerExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import java.util.concurrent.TimeUnit;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
new file mode 100644
index 0000000..47b85e2
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
@@ -0,0 +1 @@
+package com.rxjava2.android.samples.ui.operators;

import android.util.Log;

import com.rxjava2.android.samples.ui.ExampleBaseActivity;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends ExampleBaseActivity {

    /*
     * Sample of using window
     */
    protected void doSomeWork() {
//        Observable.create(new ObservableOnSubscribe<Long>() {
//            @Override
//            public void subscribe(ObservableEmitter<Long> e) throws Exception {
//                //e.onNext(-1L); //在这里发射一个就相当于0秒也发射了一个数据
//                for (int i =0 ;i<12;i++) {
//                    Thread.sleep(1000);
//                    e.onNext((long)i);
//                    Log.d(TAG, "e.onNext:" + i);
//                }
//                e.onComplete();
//            }
//        })
        Observable.interval(1,TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<Observable<Long>>() {
                    @Override
                    public void accept(Observable<Long> observable) {
                        Log.d(TAG, "Sub Divide begin....");
                        textView.append("Sub Divide begin ....");
                        textView.append(AppConstant.LINE_SEPARATOR);
                        observable
                                .subscribeOn(Schedulers.io())
                                .observeOn(AndroidSchedulers.mainThread())
                                .subscribe(new Consumer<Long>() {
                            @Override
                            public void accept(Long aLong) {
                                Log.d(TAG, "Next:" + aLong);
                                textView.append("Next:" + aLong);
                                textView.append(AppConstant.LINE_SEPARATOR);
                            }
                        });
                    }
                });

        /*
        输出
        subdivide begin……
        Next:0
        Next:1
        subdivide begin……
        Next:2
        Next:3
        Next:4
        subdivide begin……
        Next:5
        Next:6
        Next:7
        subdivide begin……
        Next:8
        Next:9
        Next:10
        subdivide begin……
        Next:11

        为什么不是 0，1，2     3，4，5 ..... 这种形式呢。
        同学，问的非常好！！！
        因为0秒的时刻啥也没发射，1秒的时刻发射了0，2秒的时刻发射了1，3秒的时刻发射了2
        "对呀，前3秒嘛，因该0，1，2嘛"，但是3秒是指时间片段，[0,1) [1,2) [2,3) 左闭右开 这三秒只发射了0和1
         */
    }
}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
similarity index 95%
rename from app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
index f73bb68..d3e18f4 100644
--- a/app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
@@ -1,6 +1,6 @@
-package com.rxjava2.android.samples.operators;
+package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ExampleBaseActivity;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 import com.rxjava2.android.samples.model.User;
 import com.rxjava2.android.samples.utils.Utils;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/utils/AppConstant.java b/app/src/main/java/com/rxjava2/android/samples/utils/AppConstant.java
index b5a4375..4a8b40f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/utils/AppConstant.java
+++ b/app/src/main/java/com/rxjava2/android/samples/utils/AppConstant.java
@@ -6,7 +6,9 @@
 public final class AppConstant {
 
     private AppConstant() {
+        // This class in not publicly instantiable.
     }
 
     public static final String LINE_SEPARATOR = "\n";
+
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java b/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
index ddf699f..addd892 100644
--- a/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
+++ b/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
@@ -1,22 +1,10 @@
 package com.rxjava2.android.samples.utils;
 
-import android.util.Log;
-
 import com.rxjava2.android.samples.model.ApiUser;
 import com.rxjava2.android.samples.model.User;
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Random;
-import java.util.function.Consumer;
-
-import io.reactivex.Observable;
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.functions.BiFunction;
-
-import static android.icu.lang.UCharacter.GraphemeClusterBreak.T;
-import static com.rxjava2.android.samples.R.id.textView;
 
 /**
  * Created by amitshekhar on 27/08/16.
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index eb7d49d..7c37398 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -8,7 +8,7 @@
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
     android:fadeScrollbars="false"
-    tools:context="com.rxjava2.android.samples.MainActivity">
+    tools:context="com.rxjava2.android.samples.ui.MainActivity">
 
     <LinearLayout
         android:layout_width="match_parent"

From e0e98fb8c79a4b96a43c942775e488b747d39b00 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 23 Jan 2017 08:54:11 +0530
Subject: [PATCH 038/137] Attach observerTag

---
 .../samples/ui/ExampleBaseActivity.java       | 82 +++++++++----------
 1 file changed, 41 insertions(+), 41 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/ExampleBaseActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/ExampleBaseActivity.java
index 5a6b84f..e894963 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/ExampleBaseActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/ExampleBaseActivity.java
@@ -44,35 +44,35 @@ public void onClick(View view) {
     }
 
     /**
-     * Do some work when click the button.
+     * Do some work on button click.
      */
-    protected abstract void doSomeWork() ;
+    protected abstract void doSomeWork();
 
     protected <T> Observer<T> getObserver() {
         return getObserver("");
     }
 
-    protected <T> Observer<T> getObserver(final Object theNumberOfObserver) {
+    protected <T> Observer<T> getObserver(final Object observerTag) {
         return new Observer<T>() {
 
             @Override
             public void onSubscribe(Disposable d) {
-                ExampleBaseActivity.this.onSubscribe(theNumberOfObserver,d);
+                ExampleBaseActivity.this.onSubscribe(observerTag, d);
             }
 
             @Override
             public void onNext(T value) {
-                ExampleBaseActivity.this.onNext(theNumberOfObserver,value);
+                ExampleBaseActivity.this.onNext(observerTag, value);
             }
 
             @Override
             public void onError(Throwable e) {
-                ExampleBaseActivity.this.onError(theNumberOfObserver,e);
+                ExampleBaseActivity.this.onError(observerTag, e);
             }
 
             @Override
             public void onComplete() {
-                ExampleBaseActivity.this.onComplete(theNumberOfObserver);
+                ExampleBaseActivity.this.onComplete(observerTag);
             }
         };
     }
@@ -81,21 +81,21 @@ protected CompletableObserver getCompletableObserver() {
         return getCompletableObserver("");
     }
 
-    protected CompletableObserver getCompletableObserver(final Object theNumberOfObserver) {
+    protected CompletableObserver getCompletableObserver(final Object observerTag) {
         return new CompletableObserver() {
             @Override
             public void onSubscribe(Disposable d) {
-                ExampleBaseActivity.this.onSubscribe(theNumberOfObserver, d);
+                ExampleBaseActivity.this.onSubscribe(observerTag, d);
             }
 
             @Override
             public void onComplete() {
-                ExampleBaseActivity.this.onComplete(theNumberOfObserver);
+                ExampleBaseActivity.this.onComplete(observerTag);
             }
 
             @Override
             public void onError(Throwable e) {
-                ExampleBaseActivity.this.onError(theNumberOfObserver, e);
+                ExampleBaseActivity.this.onError(observerTag, e);
             }
         };
     }
@@ -104,21 +104,21 @@ protected <T> DisposableObserver<T> getDisposableObserver() {
         return getDisposableObserver("");
     }
 
-    protected <T> DisposableObserver<T> getDisposableObserver(final Object theNumberOfObserver) {
+    protected <T> DisposableObserver<T> getDisposableObserver(final Object observerTag) {
         return new DisposableObserver<T>() {
             @Override
             public void onNext(T t) {
-                ExampleBaseActivity.this.onNext(theNumberOfObserver, t);
+                ExampleBaseActivity.this.onNext(observerTag, t);
             }
 
             @Override
             public void onError(Throwable e) {
-                ExampleBaseActivity.this.onError(theNumberOfObserver, e);
+                ExampleBaseActivity.this.onError(observerTag, e);
             }
 
             @Override
             public void onComplete() {
-                ExampleBaseActivity.this.onComplete(theNumberOfObserver);
+                ExampleBaseActivity.this.onComplete(observerTag);
             }
         };
     }
@@ -127,21 +127,21 @@ protected <T> SingleObserver<T> getSingleObserver() {
         return getSingleObserver("");
     }
 
-    protected <T> SingleObserver<T> getSingleObserver(final Object theNumberOfObserver) {
+    protected <T> SingleObserver<T> getSingleObserver(final Object observerTag) {
         return new SingleObserver<T>() {
             @Override
             public void onSubscribe(Disposable d) {
-                ExampleBaseActivity.this.onSubscribe(theNumberOfObserver, d);
+                ExampleBaseActivity.this.onSubscribe(observerTag, d);
             }
 
             @Override
             public void onSuccess(T t) {
-                ExampleBaseActivity.this.onNext(theNumberOfObserver, t);
+                ExampleBaseActivity.this.onNext(observerTag, t);
             }
 
             @Override
             public void onError(Throwable e) {
-                ExampleBaseActivity.this.onError(theNumberOfObserver, e);
+                ExampleBaseActivity.this.onError(observerTag, e);
             }
         };
     }
@@ -150,32 +150,32 @@ protected <T> MaybeObserver<T> getMaybeObserver() {
         return getMaybeObserver("");
     }
 
-    protected <T> MaybeObserver<T> getMaybeObserver(final Object theNumberOfObserver) {
+    protected <T> MaybeObserver<T> getMaybeObserver(final Object observerTag) {
         return new MaybeObserver<T>() {
             @Override
             public void onSubscribe(Disposable d) {
-                ExampleBaseActivity.this.onSubscribe(theNumberOfObserver, d);
+                ExampleBaseActivity.this.onSubscribe(observerTag, d);
             }
 
             @Override
             public void onSuccess(T t) {
-                ExampleBaseActivity.this.onSuccess(theNumberOfObserver, t);
+                ExampleBaseActivity.this.onSuccess(observerTag, t);
             }
 
             @Override
             public void onError(Throwable e) {
-                ExampleBaseActivity.this.onError(theNumberOfObserver, e);
+                ExampleBaseActivity.this.onError(observerTag, e);
             }
 
             @Override
             public void onComplete() {
-                ExampleBaseActivity.this.onComplete(theNumberOfObserver);
+                ExampleBaseActivity.this.onComplete(observerTag);
             }
         };
     }
 
-    protected void onSubscribe(Object theNumberOfObserver,Disposable d) {
-        String msg = theNumberOfObserver + "  onSubscribe";
+    protected void onSubscribe(Object observerTag, Disposable d) {
+        String msg = observerTag + "  onSubscribe";
         if (d != null) {
             msg = msg + ": isDisposed :" + d.isDisposed();
         }
@@ -184,19 +184,19 @@ protected void onSubscribe(Object theNumberOfObserver,Disposable d) {
         textView.append(AppConstant.LINE_SEPARATOR);
     }
 
-    protected <T> void onNext(Object theNumberOfObserver,T value) {
-        onPositive(theNumberOfObserver,"onNext",value);
+    protected <T> void onNext(Object observerTag, T value) {
+        onPositive(observerTag, "onNext", value);
     }
 
-    protected <T> void onSuccess(Object theNumberOfObserver, T value) {
-        onPositive(theNumberOfObserver,"onSuccess",value);
+    protected <T> void onSuccess(Object observerTag, T value) {
+        onPositive(observerTag, "onSuccess", value);
     }
 
-    private <T> void onPositive(Object theNumberOfObserver,String positiveKey,T value) {
+    private <T> void onPositive(Object observerTag, String positiveKey, T value) {
         if (value instanceof List) {
             List valueList = (List) value;
-            Log.d(TAG, theNumberOfObserver+" "+positiveKey+"  size :" + valueList.size());
-            textView.append( theNumberOfObserver+" "+positiveKey+"  size :" + valueList.size());
+            Log.d(TAG, observerTag + " " + positiveKey + "  size :" + valueList.size());
+            textView.append(observerTag + " " + positiveKey + "  size :" + valueList.size());
             textView.append(AppConstant.LINE_SEPARATOR);
             for (Object obj : valueList) {
                 Log.d(TAG, " : value : " + obj.toString());
@@ -204,22 +204,22 @@ private <T> void onPositive(Object theNumberOfObserver,String positiveKey,T valu
                 textView.append(AppConstant.LINE_SEPARATOR);
             }
         } else {
-            Log.d(TAG, theNumberOfObserver+" "+positiveKey+"  value : " + value);
-            textView.append(theNumberOfObserver+" "+positiveKey+" : value : " + value);
+            Log.d(TAG, observerTag + " " + positiveKey + "  value : " + value);
+            textView.append(observerTag + " " + positiveKey + " : value : " + value);
             textView.append(AppConstant.LINE_SEPARATOR);
         }
     }
 
-    protected  void onError(Object theNumberOfObserver,Throwable e) {
-        textView.append(theNumberOfObserver+"  onError : " + e.getMessage());
+    protected void onError(Object observerTag, Throwable e) {
+        textView.append(observerTag + "  onError : " + e.getMessage());
         textView.append(AppConstant.LINE_SEPARATOR);
-        Log.e(TAG, theNumberOfObserver+"  onError : " , e);
+        Log.e(TAG, observerTag + "  onError : ", e);
     }
 
-    public void onComplete(Object theNumberOfObserver) {
-        textView.append(theNumberOfObserver+"  onComplete");
+    public void onComplete(Object observerTag) {
+        textView.append(observerTag + "  onComplete");
         textView.append(AppConstant.LINE_SEPARATOR);
-        Log.d(TAG, theNumberOfObserver+"  onComplete");
+        Log.d(TAG, observerTag + "  onComplete");
     }
 
 

From f0a5ca2116d3bd9111968111d110b996f20754ff Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 23 Jan 2017 10:24:07 +0530
Subject: [PATCH 039/137] few examples verified a/c to explanation.

---
 .../AsyncSubjectExampleActivity.java          |  5 ++++-
 .../BehaviorSubjectExampleActivity.java       |  2 --
 .../ui/operators/BufferExampleActivity.java   | 21 +------------------
 3 files changed, 5 insertions(+), 23 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
index 8fb9b17..3626c7d 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
@@ -25,13 +25,16 @@ protected void doSomeWork() {
         source.onNext(3);
 
         /*
-         * it will emit 4 and onComplete for second observer also.
+         * it will also emit 4 and onComplete for second observer also.
          */
         source.subscribe(getObserver("Second"));
 
         source.onNext(4);
         source.onComplete();
 
+        /*
+         * it will also emit 4 and onComplete for second observer also.
+         */
         source.subscribe(getObserver("Third"));
     }
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
index 0d8d585..cac0bd8 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
@@ -18,8 +18,6 @@ protected void doSomeWork() {
 
         BehaviorSubject<Integer> source = BehaviorSubject.createDefault(-1);
 
-//        source.onNext(0); //如果启用这句话，firstObserver将获得 0 (最近发射的最后一个数据)，1，2，3，4
-
         source.subscribe(getObserver("First")); // it will get -1, 1, 2, 3, 4 and onComplete
 
         source.onNext(1);
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
index d5bc50f..59c77bb 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
@@ -14,9 +14,6 @@ public class BufferExampleActivity extends ExampleBaseActivity {
      */
     protected void doSomeWork() {
 
-    /*
-
-        Observable<List<String>> buffered = getObservable().buffer(3, 1);
 
         // 3 means,  it takes max of three from its start index and create list
         // 1 means, it jumps one step every time
@@ -27,23 +24,7 @@ protected void doSomeWork() {
         // 4 - four, five
         // 5 - five
 
-        buffered.subscribe(getObserver());
-
-        */
-
-       /*
-        //每次取2个  每次跳过3个
-        //第一次：one、two
-        //第二次：four、five
-        getObservable().buffer(2, 3)
-                .subscribe(getObserver());
-        */
-
-        //每次取3个，每次跳过2个
-        //第一次：one、two、three
-        //第二次：three、four、five
-        //第三次：five
-        getObservable().buffer(3, 2)
+        getObservable().buffer(3, 1)
                 .subscribe(getObserver());
 
     }

From 6d3629d0e7be621bf569504ac1b7cc5b171c8873 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 23 Jan 2017 10:37:00 +0530
Subject: [PATCH 040/137] few examples verified a/c to explanation.

---
 .../android/samples/ui/operators/BufferExampleActivity.java | 6 ++----
 .../ui/operators/CompletableObserverExampleActivity.java    | 5 ++---
 .../android/samples/ui/operators/ConcatExampleActivity.java | 6 +-----
 .../samples/ui/operators/DebounceExampleActivity.java       | 5 +----
 4 files changed, 6 insertions(+), 16 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
index 59c77bb..f779842 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
@@ -15,8 +15,8 @@ public class BufferExampleActivity extends ExampleBaseActivity {
     protected void doSomeWork() {
 
 
-        // 3 means,  it takes max of three from its start index and create list
-        // 1 means, it jumps one step every time
+        // count = 3 means,  it takes max of three from its start index and create list
+        // skip = 1 means, it jumps one step every time
         // so the it gives the following list
         // 1 - one, two, three
         // 2 - two, three, four
@@ -33,6 +33,4 @@ private Observable<String> getObservable() {
         return Observable.just("one", "two", "three", "four", "five");
     }
 
-
-
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
index afaf174..3089d8e 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
@@ -17,10 +17,9 @@ public class CompletableObserverExampleActivity extends ExampleBaseActivity {
 
     /*
      * simple example using CompletableObserver
+     * Completable does not consist of onNext()
      */
     protected void doSomeWork() {
-        //延迟多久发射onComplete
-//        Completable completable = Completable.timer(1000, TimeUnit.MILLISECONDS);
 
         Completable completable = Completable.create(new CompletableOnSubscribe() {
             @Override
@@ -30,7 +29,7 @@ public void subscribe(CompletableEmitter e) throws Exception {
                     if (randomInt % 2 == 0) {
                         e.onComplete();
                     } else {
-                        e.onError(new IllegalStateException("Can't completable because of error occur."));
+                        e.onError(new IllegalStateException("Can't complete because an error has occurred."));
                     }
                 }
             }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
index 5bc8d96..2899ef5 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
@@ -9,16 +9,13 @@
  */
 public class ConcatExampleActivity extends ExampleBaseActivity {
 
-    private static final String TAG = ConcatExampleActivity.class.getSimpleName();
-
-
     /*
      * Using concat operator to combine Observable : concat maintain
      * the order of Observable.
      * It will emit all the 7 values in order
      * here - first "A1", "A2", "A3", "A4" and then "B1", "B2", "B3"
      * first all from the first Observable and then
-     * all from the second Observable all in order
+     * all from the second Observable, all in order
      */
     protected void doSomeWork() {
         final String[] aStrings = {"A1", "A2", "A3", "A4"};
@@ -32,5 +29,4 @@ protected void doSomeWork() {
     }
 
 
-
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
index 7c9315b..64c7306 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
@@ -16,9 +16,6 @@
 
 public class DebounceExampleActivity extends ExampleBaseActivity {
 
-    private static final String TAG = DebounceExampleActivity.class.getSimpleName();
-
-
     /*
     * Using debounce() -> only emit an item from an Observable if a particular time-span has
     * passed without it emitting another item, so it will emit 2, 4, 5 as we have simulated it.
@@ -61,7 +58,7 @@ public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                 4和5之间有605毫秒的间隔，没有交集，所以4被发射出去。
                 5在接下来的500毫秒内没有和其他元素有交集，所以发射出去。
                 （如还不明白，建议在纸上画出各个元素的时间片段）
-                 */
+                s*/
 
             }
         });

From c3c07abaa3642e88a0c6c6575cc79835f6de362f Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 23 Jan 2017 10:45:52 +0530
Subject: [PATCH 041/137] few changes

---
 .../java/com/rxjava2/android/samples/model/Car.java   |  2 +-
 .../samples/ui/operators/DeferExampleActivity.java    | 11 +++++------
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/model/Car.java b/app/src/main/java/com/rxjava2/android/samples/model/Car.java
index de771e4..90f86ee 100644
--- a/app/src/main/java/com/rxjava2/android/samples/model/Car.java
+++ b/app/src/main/java/com/rxjava2/android/samples/model/Car.java
@@ -10,7 +10,7 @@
  */
 public class Car {
 
-    private String brand="Volvo";
+    private String brand;
 
     public void setBrand(String brand) {
         this.brand = brand;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
index 9195a92..2c86e4f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 import com.rxjava2.android.samples.model.Car;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 
 import io.reactivex.Observable;
 
@@ -17,13 +17,12 @@ protected void doSomeWork() {
 
         Car car = new Car();
 
-//        car.setBrand("Audi");
-
         Observable<String> brandDeferObservable = car.brandDeferObservable();
 
-        car.setBrand("BMW");  // Even if we are setting the brand after creating Observable
-                              // we will get the brand as BMW.
-                              // If we had not used defer, we would have got null as the brand.
+        car.setBrand("BMW");
+        // Even if we are setting the brand after creating Observable
+        // we will get the brand as BMW.
+        // If we had not used defer, we would have got null as the brand.
 
         brandDeferObservable
                 .subscribe(getObserver());

From 13a247e3014c3d148ff346d912a6a6089c8ab17d Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 23 Jan 2017 11:10:49 +0530
Subject: [PATCH 042/137] More examples verified

---
 .../ui/operators/FlowableExampleActivity.java | 26 +++++--------------
 .../ui/operators/IntervalExampleActivity.java |  3 +--
 .../LastOperatorExampleActivity.java          |  6 ++---
 .../ui/operators/MapExampleActivity.java      |  2 +-
 .../PublishSubjectExampleActivity.java        |  6 ++---
 .../ui/operators/ReplayExampleActivity.java   |  1 -
 .../ReplaySubjectExampleActivity.java         |  9 +++----
 .../ui/operators/ScanExampleActivity.java     |  4 +--
 8 files changed, 17 insertions(+), 40 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
index fd9e261..b80da45 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
@@ -25,33 +25,31 @@ protected void doSomeWork() {
             mSubscription.cancel();
         }
 
-         Flowable.range(0, 20)
+        Flowable.range(0, 20)
                 .subscribeOn(Schedulers.io())
-                 .observeOn(AndroidSchedulers.mainThread())
+                .observeOn(AndroidSchedulers.mainThread())
                 .subscribeWith(new Subscriber<Integer>() {
 
                     //当订阅后，会首先调用这个方法，其实就相当于onStart()，
                     //传入的Subscription s参数可以用于请求数据或者取消订阅
                     @Override
                     public void onSubscribe(Subscription s) {
-                        FlowableExampleActivity.this.onSubscribe("",null);
+                        FlowableExampleActivity.this.onSubscribe("", null);
                         mSubscription = s;
                         //要说明一下，request这个方法若不调用,下游的onNext与OnComplete都不会调用；
                         // 若你写的数量小于真实数据量，只会传你的个数，而且不会调用onComplete方法（毕竟没有传完嘛，当然没有complete）
-//                        mSubscription.request(10);
                         mSubscription.request(1);
                     }
 
                     @Override
                     public void onNext(Integer o) {
-//                        SystemClock.sleep(1000);
-                        FlowableExampleActivity.this.onNext("",o);
+                        FlowableExampleActivity.this.onNext("", o);
                         mSubscription.request(1);
                     }
 
                     @Override
                     public void onError(Throwable t) {
-                        FlowableExampleActivity.this.onError("",t);
+                        FlowableExampleActivity.this.onError("", t);
                     }
 
                     @Override
@@ -60,25 +58,13 @@ public void onComplete() {
                     }
                 });
 
-
-//        Flowable<Integer> observable = Flowable.just(1, 2, 3, 4);
-//
-//        observable.reduce(50, new BiFunction<Integer, Integer, Integer>() {
-//            @Override
-//            public Integer apply(Integer t1, Integer t2) {
-//                return t1 + t2;
-//            }
-//        }).subscribe(getObserver());
-
     }
 
-
     @Override
     protected void onDestroy() {
-        if (mSubscription!=null) {
+        if (mSubscription != null) {
             mSubscription.cancel();
         }
         super.onDestroy();
-//        mCompositeDisposable.dispose();
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
index 77fb1ec..b516456 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
@@ -36,8 +36,7 @@ protected void doSomeWork() {
     }
 
     private Observable<? extends Long> getObservable() {
-        //第一个参数是initialDelay初始化延迟，第二个参数是间隔时间。
-        return Observable.interval(0, 1, TimeUnit.SECONDS);
+        return Observable.interval(0, 2, TimeUnit.SECONDS);
     }
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
index b019b5f..2222afb 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
@@ -10,15 +10,13 @@
 public class LastOperatorExampleActivity extends ExampleBaseActivity {
 
     protected void doSomeWork() {
-        getObservable().last("ADefault") // the default item ("ADefault") to emit if the source ObservableSource is empty
+        getObservable()
+                .last("Default") // the default item ("Default") to emit if the source ObservableSource is empty
                 .subscribe(this.<String>getSingleObserver());
-        //经过Last操作后，Observable变成SingleObservable了
     }
 
     private Observable<String> getObservable() {
-//        return Observable.empty();
         return Observable.just("A1", "A2", "A3", "A4", "A5", "A6");
     }
 
-
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
index ccecb7f..3e4c2bc 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
@@ -1,8 +1,8 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 import com.rxjava2.android.samples.model.ApiUser;
 import com.rxjava2.android.samples.model.User;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 import com.rxjava2.android.samples.utils.Utils;
 
 import java.util.List;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
index 0eaabec..a7e31f6 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
@@ -11,8 +11,8 @@
 public class PublishSubjectExampleActivity extends ExampleBaseActivity {
 
     /* PublishSubject emits to an observer only those items that are emitted
-     * by the source Observable, subsequent to the time of the subscription.
-     */
+    * by the source Observable, subsequent to the time of the subscription.
+    */
     protected void doSomeWork() {
 
         //PublishSubject就像鼠标事件，不管有没有订阅者，他都按照他的设定发事件，什么时候有订阅者，那么订阅者就从那个时候获取事件。
@@ -26,7 +26,7 @@ protected void doSomeWork() {
         source.onNext(1);
         source.onNext(2);
         source.onNext(3);
-//        source.onComplete();//如果在这里onComplete了，那么后面的订阅者只能收到onComplete事件
+        //source.onComplete();//如果在这里onComplete了，那么后面的订阅者只能收到onComplete事件
 
         /*
          * it will emit 4 and onComplete for second observer also.
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
index 60c4651..72ed85c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
@@ -41,5 +41,4 @@ protected void doSomeWork() {
     }
 
 
-
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
index 63e4db0..7692494 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
@@ -25,22 +25,19 @@ protected void doSomeWork() {
         source.onNext(-1);
         source.onNext(0);
 
-        source.subscribe(this.<Integer>getObserver("First")); // it will get -1, 0, 1, 2, 3, 4
+        source.subscribe(this.<Integer>getObserver("First")); // it will get -1, 0, 1, 2, 3, 4, 5
 
         source.onNext(1);
         source.onNext(2);
         source.onNext(3);
         source.onNext(4);
-//        source.onComplete();
-//OnComplete后发射数据就无效了。如果仍要发射数据，需要重新创建ReplaySubject 并重新订阅
-//        source.onNext(5);
 
         /*
-         * it will emit -1, 0, 1, 2, 3, 4 for second observer also as we have used replay
+         * it will emit -1, 0, 1, 2, 3, 4, 5 for second observer also as we have used replay
          */
         source.subscribe(this.<Integer>getObserver("Second"));
 
-        source.onNext(6);
+        source.onNext(5);
         source.onComplete();
 
     }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
index 0397968..4a8d08e 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
@@ -9,7 +9,7 @@
 
 public class ScanExampleActivity extends ExampleBaseActivity {
 
-    /* Using scan operator, it sends also the previous result */
+    /* Using scan operator, it sends the previous result also */
     protected void doSomeWork() {
         getObservable()
                 // Run on a background thread
@@ -25,8 +25,6 @@ public Integer apply(Integer int1, Integer int2) throws Exception {
                 .subscribe(getObserver());
         //Scan又叫累加器。将原始第一个与第二个应用函数的值作为第二个发射出去数据（第一个发射的数据就是原始第一个数据）
         //第三个发射的数据是原始第三个与第二个发射出去的应用函数后的值。
-
-
     }
 
     private Observable<Integer> getObservable() {

From 8f97bfdc22e7181bf7959e8f3e62a9c313e622b0 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 23 Jan 2017 11:28:23 +0530
Subject: [PATCH 043/137] More examples verified

---
 .../android/samples/ui/operators/ScanExampleActivity.java   | 4 +++-
 .../samples/ui/operators/SingleObserverExampleActivity.java | 6 +-----
 .../android/samples/ui/operators/WindowExampleActivity.java | 2 +-
 .../android/samples/ui/operators/ZipExampleActivity.java    | 2 +-
 4 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
index 4a8d08e..100bcd6 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
@@ -9,7 +9,9 @@
 
 public class ScanExampleActivity extends ExampleBaseActivity {
 
-    /* Using scan operator, it sends the previous result also */
+    /* Using scan operator, apply a function to each item emitted by an Observable,
+    * sequentially, and emit each successive value
+    */
     protected void doSomeWork() {
         getObservable()
                 // Run on a background thread
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
index fd1b402..5155e05 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
@@ -24,8 +24,6 @@ protected void doSomeWork() {
             public void subscribe(SingleEmitter<String> e) throws Exception {
                 if (!e.isDisposed()) {
                     e.onSuccess("Hello Success!");
-//                    e.onError(new RuntimeException("Occur RuntimeException"));
-//                    throw new RuntimeException("Occur RuntimeException");
                 }
             }
         }).doOnSuccess(new Consumer<String>() {
@@ -41,11 +39,9 @@ public void accept(Throwable throwable) throws Exception {
         }).onErrorReturn(new Function<Throwable, String>() {
             @Override
             public String apply(Throwable throwable) throws Exception {
-                return "Exception message: "+throwable.getMessage();
+                return "Exception message: " + throwable.getMessage();
             }
         }).subscribe(getSingleObserver());
-//        Single.just("Amit")
-//                .subscribe(getSingleObserver());
     }
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
index 47b85e2..fb841dc 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
@@ -1 +1 @@
-package com.rxjava2.android.samples.ui.operators;

import android.util.Log;

import com.rxjava2.android.samples.ui.ExampleBaseActivity;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends ExampleBaseActivity {

    /*
     * Sample of using window
     */
    protected void doSomeWork() {
//        Observable.create(new ObservableOnSubscribe<Long>() {
//            @Override
//            public void subscribe(ObservableEmitter<Long> e) throws Exception {
//                //e.onNext(-1L); //在这里发射一个就相当于0秒也发射了一个数据
//                for (int i =0 ;i<12;i++) {
//                    Thread.sleep(1000);
//                    e.onNext((long)i);
//                    Log.d(TAG, "e.onNext:" + i);
//                }
//                e.onComplete();
//            }
//        })
        Observable.interval(1,TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<Observable<Long>>() {
                    @Override
                    public void accept(Observable<Long> observable) {
                        Log.d(TAG, "Sub Divide begin....");
                        textView.append("Sub Divide begin ....");
                        textView.append(AppConstant.LINE_SEPARATOR);
                        observable
                                .subscribeOn(Schedulers.io())
                                .observeOn(AndroidSchedulers.mainThread())
                                .subscribe(new Consumer<Long>() {
                            @Override
                            public void accept(Long aLong) {
                                Log.d(TAG, "Next:" + aLong);
                                textView.append("Next:" + aLong);
                                textView.append(AppConstant.LINE_SEPARATOR);
                            }
                        });
                    }
                });

        /*
        输出
        subdivide begin……
        Next:0
        Next:1
        subdivide begin……
        Next:2
        Next:3
        Next:4
        subdivide begin……
        Next:5
        Next:6
        Next:7
        subdivide begin……
        Next:8
        Next:9
        Next:10
        subdivide begin……
        Next:11

        为什么不是 0，1，2     3，4，5 ..... 这种形式呢。
        同学，问的非常好！！！
        因为0秒的时刻啥也没发射，1秒的时刻发射了0，2秒的时刻发射了1，3秒的时刻发射了2
        "对呀，前3秒嘛，因该0，1，2嘛"，但是3秒是指时间片段，[0,1) [1,2) [2,3) 左闭右开 这三秒只发射了0和1
         */
    }
}
\ No newline at end of file
+package com.rxjava2.android.samples.ui.operators;

import android.util.Log;

import com.rxjava2.android.samples.ui.ExampleBaseActivity;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends ExampleBaseActivity {

    /*
     * Sample of window operator
     */
    protected void doSomeWork() {

        Observable.interval(1, TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<Observable<Long>>() {
                    @Override
                    public void accept(Observable<Long> observable) {
                        Log.d(TAG, "Sub Divide begin....");
                        textView.append("Sub Divide begin ....");
                        textView.append(AppConstant.LINE_SEPARATOR);
                        observable
                                .subscribeOn(Schedulers.io())
                                .observeOn(AndroidSchedulers.mainThread())
                                .subscribe(new Consumer<Long>() {
                                    @Override
                                    public void accept(Long aLong) {
                                        Log.d(TAG, "Next:" + aLong);
                                        textView.append("Next:" + aLong);
                                        textView.append(AppConstant.LINE_SEPARATOR);
                                    }
                                });
                    }
                });

        /*
        输出
        subdivide begin……
        Next:0
        Next:1
        subdivide begin……
        Next:2
        Next:3
        Next:4
        subdivide begin……
        Next:5
        Next:6
        Next:7
        subdivide begin……
        Next:8
        Next:9
        Next:10
        subdivide begin……
        Next:11

        为什么不是 0，1，2     3，4，5 ..... 这种形式呢。
        同学，问的非常好！！！
        因为0秒的时刻啥也没发射，1秒的时刻发射了0，2秒的时刻发射了1，3秒的时刻发射了2
        "对呀，前3秒嘛，因该0，1，2嘛"，但是3秒是指时间片段，[0,1) [1,2) [2,3) 左闭右开 这三秒只发射了0和1
         */
    }
}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
index d3e18f4..5aa860a 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 import com.rxjava2.android.samples.model.User;
+import com.rxjava2.android.samples.ui.ExampleBaseActivity;
 import com.rxjava2.android.samples.utils.Utils;
 
 import java.util.List;

From f7e3549cbb8f8fa89dd71e020c03ebffe07d2c46 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 24 Jan 2017 10:38:39 +0530
Subject: [PATCH 044/137] Window example explained

---
 .../android/samples/ui/operators/WindowExampleActivity.java     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
index fb841dc..aced36b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
@@ -1 +1 @@
-package com.rxjava2.android.samples.ui.operators;

import android.util.Log;

import com.rxjava2.android.samples.ui.ExampleBaseActivity;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends ExampleBaseActivity {

    /*
     * Sample of window operator
     */
    protected void doSomeWork() {

        Observable.interval(1, TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<Observable<Long>>() {
                    @Override
                    public void accept(Observable<Long> observable) {
                        Log.d(TAG, "Sub Divide begin....");
                        textView.append("Sub Divide begin ....");
                        textView.append(AppConstant.LINE_SEPARATOR);
                        observable
                                .subscribeOn(Schedulers.io())
                                .observeOn(AndroidSchedulers.mainThread())
                                .subscribe(new Consumer<Long>() {
                                    @Override
                                    public void accept(Long aLong) {
                                        Log.d(TAG, "Next:" + aLong);
                                        textView.append("Next:" + aLong);
                                        textView.append(AppConstant.LINE_SEPARATOR);
                                    }
                                });
                    }
                });

        /*
        输出
        subdivide begin……
        Next:0
        Next:1
        subdivide begin……
        Next:2
        Next:3
        Next:4
        subdivide begin……
        Next:5
        Next:6
        Next:7
        subdivide begin……
        Next:8
        Next:9
        Next:10
        subdivide begin……
        Next:11

        为什么不是 0，1，2     3，4，5 ..... 这种形式呢。
        同学，问的非常好！！！
        因为0秒的时刻啥也没发射，1秒的时刻发射了0，2秒的时刻发射了1，3秒的时刻发射了2
        "对呀，前3秒嘛，因该0，1，2嘛"，但是3秒是指时间片段，[0,1) [1,2) [2,3) 左闭右开 这三秒只发射了0和1
         */
    }
}
\ No newline at end of file
+package com.rxjava2.android.samples.ui.operators;

import android.util.Log;

import com.rxjava2.android.samples.ui.ExampleBaseActivity;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends ExampleBaseActivity {

    /*
     * Example using window operator -> It periodically
     * subdivide items from an Observable into
     * Observable windows and emit these windows rather than
     * emitting the items one at a time
     */
    protected void doSomeWork() {

        Observable.interval(1, TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<Observable<Long>>() {
                    @Override
                    public void accept(Observable<Long> observable) {
                        Log.d(TAG, "Sub Divide begin....");
                        textView.append("Sub Divide begin ....");
                        textView.append(AppConstant.LINE_SEPARATOR);
                        observable
                                .subscribeOn(Schedulers.io())
                                .observeOn(AndroidSchedulers.mainThread())
                                .subscribe(new Consumer<Long>() {
                                    @Override
                                    public void accept(Long value) {
                                        Log.d(TAG, "Next:" + value);
                                        textView.append("Next:" + value);
                                        textView.append(AppConstant.LINE_SEPARATOR);
                                    }
                                });
                    }
                });
    }
}
\ No newline at end of file

From 441ddf532ca1f0d3dfb87f66315e5da405453f14 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Wed, 25 Jan 2017 12:58:47 +0530
Subject: [PATCH 045/137] Update links

---
 README.md | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/README.md b/README.md
index 114898d..cd64da2 100644
--- a/README.md
+++ b/README.md
@@ -75,22 +75,22 @@ RxJava1 -> RxJava2
 
 # Highlights of the examples :
 
-* [DisposableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/DisposableExampleActivity.java) - Using `CompositeDisposable`
-* [FlowableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/FlowableExampleActivity.java) - Using `Flowable` and `reduce` operator
-* [SingleObserverExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/SingleObserverExampleActivity.java) - Using `SingleObserver`
-* [CompletableObserverActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/CompletableObserverExampleActivity.java) - Using `CompletableObserver`
-* [MapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/MapExampleActivity.java) - Using `map` Operator
-* [ZipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/ZipExampleActivity.java) - Using `zip` Operator
-* [BufferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/BufferExampleActivity.java) - Using `buffer` Operator
-* [TakeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/TakeExampleActivity.java) - Using `take` Operator
-* [ReduceExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/ReduceExampleActivity.java) - Using `reduce` Operator
-* [FilterExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/FilterExampleActivity.java) - Using `filter` Operator
-* [SkipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/SkipExampleActivity.java) - Using `skip` Operator
-* [ReplayExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/ReplayExampleActivity.java) - Using `replay` Operator
-* [ConcatExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/ConcatExampleActivity.java) - Using `concat` Operator
-* [MergeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/MergeExampleActivity.java) - Using `merge` Operator
-* [DeferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/DeferExampleActivity.java) - Using `defer` Observable
-* [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/operators/IntervalExampleActivity.java) - Using `Interval`
+* [DisposableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java) - Using `CompositeDisposable`
+* [FlowableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java) - Using `Flowable` and `reduce` operator
+* [SingleObserverExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java) - Using `SingleObserver`
+* [CompletableObserverActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java) - Using `CompletableObserver`
+* [MapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java) - Using `map` Operator
+* [ZipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java) - Using `zip` Operator
+* [BufferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java) - Using `buffer` Operator
+* [TakeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java) - Using `take` Operator
+* [ReduceExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java) - Using `reduce` Operator
+* [FilterExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java) - Using `filter` Operator
+* [SkipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java) - Using `skip` Operator
+* [ReplayExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java) - Using `replay` Operator
+* [ConcatExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java) - Using `concat` Operator
+* [MergeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java) - Using `merge` Operator
+* [DeferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java) - Using `defer` Observable
+* [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java) - Using `Interval`
 
 ### TODO 
 

From e2431327f1abbf2d4f7195a3b8b5782520f84664 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Thu, 26 Jan 2017 17:58:44 +0530
Subject: [PATCH 046/137] Minor changes

---
 .../main/java/com/rxjava2/android/samples/MyApplication.java  | 2 +-
 .../main/java/com/rxjava2/android/samples/utils/Utils.java    | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/MyApplication.java b/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
index b5c7649..be870d6 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
@@ -8,7 +8,7 @@
 
 public class MyApplication extends Application {
 
-    public static final String TAG = MyApplication.class.getSimpleName();
+    public static final String TAG = "MyApplication";
 
     @Override
     public void onCreate() {
diff --git a/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java b/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
index addd892..ecd5a4d 100644
--- a/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
+++ b/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
@@ -11,6 +11,10 @@
  */
 public class Utils {
 
+    private Utils() {
+        // This class in not publicly instantiable.
+    }
+
     public static List<User> getUserList() {
 
         List<User> userList = new ArrayList<>();

From 50cc3c388f93ebd3734264c5efe0bb09a6b027ff Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 3 Feb 2017 20:00:33 +0530
Subject: [PATCH 047/137] Code refactor for simplicity

---
 .../rxjava2/android/samples/model/Car.java    |   1 -
 .../samples/ui/ExampleBaseActivity.java       | 226 ------------------
 .../AsyncSubjectExampleActivity.java          | 112 ++++++++-
 .../BehaviorSubjectExampleActivity.java       | 106 +++++++-
 .../ui/operators/BufferExampleActivity.java   |  84 ++++++-
 .../CompletableObserverExampleActivity.java   |  75 ++++--
 .../ui/operators/ConcatExampleActivity.java   |  69 +++++-
 .../ui/operators/DebounceExampleActivity.java |  82 +++++--
 .../ui/operators/DeferExampleActivity.java    |  69 +++++-
 .../operators/DisposableExampleActivity.java  |  56 ++++-
 .../ui/operators/DistinctExampleActivity.java |  79 +++++-
 .../ui/operators/FilterExampleActivity.java   |  72 +++++-
 .../ui/operators/FlowableExampleActivity.java | 105 ++++----
 .../ui/operators/IntervalExampleActivity.java |  62 ++++-
 .../LastOperatorExampleActivity.java          |  66 ++++-
 .../ui/operators/MapExampleActivity.java      |  71 +++++-
 .../ui/operators/MergeExampleActivity.java    |  69 +++++-
 .../PublishSubjectExampleActivity.java        | 114 ++++++++-
 .../ui/operators/ReduceExampleActivity.java   |  68 +++++-
 .../ui/operators/ReplayExampleActivity.java   | 108 ++++++++-
 .../ReplaySubjectExampleActivity.java         | 116 +++++++--
 .../ui/operators/ScanExampleActivity.java     |  74 +++++-
 .../ui/operators/SimpleExampleActivity.java   |  66 ++++-
 .../SingleObserverExampleActivity.java        |  73 ++++--
 .../ui/operators/SkipExampleActivity.java     |  67 +++++-
 .../ui/operators/TakeExampleActivity.java     |  70 +++++-
 .../ThrottleFirstExampleActivity.java         |  81 ++++++-
 .../ThrottleLastExampleActivity.java          |  76 +++++-
 .../ui/operators/TimerExampleActivity.java    |  70 +++++-
 .../ui/operators/WindowExampleActivity.java   |   2 +-
 .../ui/operators/ZipExampleActivity.java      |  72 +++++-
 31 files changed, 1969 insertions(+), 492 deletions(-)
 delete mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/ExampleBaseActivity.java

diff --git a/app/src/main/java/com/rxjava2/android/samples/model/Car.java b/app/src/main/java/com/rxjava2/android/samples/model/Car.java
index 90f86ee..e223650 100644
--- a/app/src/main/java/com/rxjava2/android/samples/model/Car.java
+++ b/app/src/main/java/com/rxjava2/android/samples/model/Car.java
@@ -17,7 +17,6 @@ public void setBrand(String brand) {
     }
 
     public Observable<String> brandDeferObservable() {
-//        return Observable.just(brand);
         return Observable.defer(new Callable<ObservableSource<? extends String>>() {
             @Override
             public ObservableSource<? extends String> call() throws Exception {
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/ExampleBaseActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/ExampleBaseActivity.java
deleted file mode 100644
index e894963..0000000
--- a/app/src/main/java/com/rxjava2/android/samples/ui/ExampleBaseActivity.java
+++ /dev/null
@@ -1,226 +0,0 @@
-package com.rxjava2.android.samples.ui;
-
-import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Log;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.R;
-import com.rxjava2.android.samples.utils.AppConstant;
-
-import java.util.List;
-
-import io.reactivex.CompletableObserver;
-import io.reactivex.MaybeObserver;
-import io.reactivex.Observer;
-import io.reactivex.SingleObserver;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.observers.DisposableObserver;
-
-/**
- * Created by threshold on 2017/1/11.
- */
-
-public abstract class ExampleBaseActivity extends AppCompatActivity {
-
-    protected String TAG = getClass().getSimpleName();
-    protected Button btn;
-    protected TextView textView;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
-        btn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                doSomeWork();
-            }
-        });
-    }
-
-    /**
-     * Do some work on button click.
-     */
-    protected abstract void doSomeWork();
-
-    protected <T> Observer<T> getObserver() {
-        return getObserver("");
-    }
-
-    protected <T> Observer<T> getObserver(final Object observerTag) {
-        return new Observer<T>() {
-
-            @Override
-            public void onSubscribe(Disposable d) {
-                ExampleBaseActivity.this.onSubscribe(observerTag, d);
-            }
-
-            @Override
-            public void onNext(T value) {
-                ExampleBaseActivity.this.onNext(observerTag, value);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                ExampleBaseActivity.this.onError(observerTag, e);
-            }
-
-            @Override
-            public void onComplete() {
-                ExampleBaseActivity.this.onComplete(observerTag);
-            }
-        };
-    }
-
-    protected CompletableObserver getCompletableObserver() {
-        return getCompletableObserver("");
-    }
-
-    protected CompletableObserver getCompletableObserver(final Object observerTag) {
-        return new CompletableObserver() {
-            @Override
-            public void onSubscribe(Disposable d) {
-                ExampleBaseActivity.this.onSubscribe(observerTag, d);
-            }
-
-            @Override
-            public void onComplete() {
-                ExampleBaseActivity.this.onComplete(observerTag);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                ExampleBaseActivity.this.onError(observerTag, e);
-            }
-        };
-    }
-
-    protected <T> DisposableObserver<T> getDisposableObserver() {
-        return getDisposableObserver("");
-    }
-
-    protected <T> DisposableObserver<T> getDisposableObserver(final Object observerTag) {
-        return new DisposableObserver<T>() {
-            @Override
-            public void onNext(T t) {
-                ExampleBaseActivity.this.onNext(observerTag, t);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                ExampleBaseActivity.this.onError(observerTag, e);
-            }
-
-            @Override
-            public void onComplete() {
-                ExampleBaseActivity.this.onComplete(observerTag);
-            }
-        };
-    }
-
-    protected <T> SingleObserver<T> getSingleObserver() {
-        return getSingleObserver("");
-    }
-
-    protected <T> SingleObserver<T> getSingleObserver(final Object observerTag) {
-        return new SingleObserver<T>() {
-            @Override
-            public void onSubscribe(Disposable d) {
-                ExampleBaseActivity.this.onSubscribe(observerTag, d);
-            }
-
-            @Override
-            public void onSuccess(T t) {
-                ExampleBaseActivity.this.onNext(observerTag, t);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                ExampleBaseActivity.this.onError(observerTag, e);
-            }
-        };
-    }
-
-    protected <T> MaybeObserver<T> getMaybeObserver() {
-        return getMaybeObserver("");
-    }
-
-    protected <T> MaybeObserver<T> getMaybeObserver(final Object observerTag) {
-        return new MaybeObserver<T>() {
-            @Override
-            public void onSubscribe(Disposable d) {
-                ExampleBaseActivity.this.onSubscribe(observerTag, d);
-            }
-
-            @Override
-            public void onSuccess(T t) {
-                ExampleBaseActivity.this.onSuccess(observerTag, t);
-            }
-
-            @Override
-            public void onError(Throwable e) {
-                ExampleBaseActivity.this.onError(observerTag, e);
-            }
-
-            @Override
-            public void onComplete() {
-                ExampleBaseActivity.this.onComplete(observerTag);
-            }
-        };
-    }
-
-    protected void onSubscribe(Object observerTag, Disposable d) {
-        String msg = observerTag + "  onSubscribe";
-        if (d != null) {
-            msg = msg + ": isDisposed :" + d.isDisposed();
-        }
-        Log.d(TAG, msg);
-        textView.append(msg);
-        textView.append(AppConstant.LINE_SEPARATOR);
-    }
-
-    protected <T> void onNext(Object observerTag, T value) {
-        onPositive(observerTag, "onNext", value);
-    }
-
-    protected <T> void onSuccess(Object observerTag, T value) {
-        onPositive(observerTag, "onSuccess", value);
-    }
-
-    private <T> void onPositive(Object observerTag, String positiveKey, T value) {
-        if (value instanceof List) {
-            List valueList = (List) value;
-            Log.d(TAG, observerTag + " " + positiveKey + "  size :" + valueList.size());
-            textView.append(observerTag + " " + positiveKey + "  size :" + valueList.size());
-            textView.append(AppConstant.LINE_SEPARATOR);
-            for (Object obj : valueList) {
-                Log.d(TAG, " : value : " + obj.toString());
-                textView.append(" value : " + obj.toString());
-                textView.append(AppConstant.LINE_SEPARATOR);
-            }
-        } else {
-            Log.d(TAG, observerTag + " " + positiveKey + "  value : " + value);
-            textView.append(observerTag + " " + positiveKey + " : value : " + value);
-            textView.append(AppConstant.LINE_SEPARATOR);
-        }
-    }
-
-    protected void onError(Object observerTag, Throwable e) {
-        textView.append(observerTag + "  onError : " + e.getMessage());
-        textView.append(AppConstant.LINE_SEPARATOR);
-        Log.e(TAG, observerTag + "  onError : ", e);
-    }
-
-    public void onComplete(Object observerTag) {
-        textView.append(observerTag + "  onComplete");
-        textView.append(AppConstant.LINE_SEPARATOR);
-        Log.d(TAG, observerTag + "  onComplete");
-    }
-
-
-}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
index 3626c7d..501bc63 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
@@ -1,41 +1,131 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
 
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.subjects.AsyncSubject;
 
 /**
  * Created by amitshekhar on 17/12/16.
  */
 
-public class AsyncSubjectExampleActivity extends ExampleBaseActivity {
+public class AsyncSubjectExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = AsyncSubjectExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /* An AsyncSubject emits the last value (and only the last value) emitted by the source
      * Observable, and only after that source Observable completes. (If the source Observable
      * does not emit any values, the AsyncSubject also completes without emitting any values.)
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
+
         AsyncSubject<Integer> source = AsyncSubject.create();
 
-        source.onNext(0);
-        source.subscribe(getObserver("First")); // it will emit only 4 and onComplete
+        source.subscribe(getFirstObserver()); // it will emit only 4 and onComplete
 
         source.onNext(1);
         source.onNext(2);
         source.onNext(3);
 
         /*
-         * it will also emit 4 and onComplete for second observer also.
+         * it will emit 4 and onComplete for second observer also.
          */
-        source.subscribe(getObserver("Second"));
+        source.subscribe(getSecondObserver());
 
         source.onNext(4);
         source.onComplete();
 
-        /*
-         * it will also emit 4 and onComplete for second observer also.
-         */
-        source.subscribe(getObserver("Third"));
+    }
+
+
+    private Observer<Integer> getFirstObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" First onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" First onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" First onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onComplete");
+            }
+        };
+    }
+
+    private Observer<Integer> getSecondObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
+                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
+                textView.append(AppConstant.LINE_SEPARATOR);
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" Second onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" Second onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" Second onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onComplete");
+            }
+        };
     }
 
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
index cac0bd8..3e2d9cd 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
@@ -1,24 +1,53 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
 
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.subjects.BehaviorSubject;
 
 /**
  * Created by amitshekhar on 17/12/16.
  */
 
-public class BehaviorSubjectExampleActivity extends ExampleBaseActivity {
+public class BehaviorSubjectExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = BehaviorSubjectExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /* When an observer subscribes to a BehaviorSubject, it begins by emitting the item most
      * recently emitted by the source Observable (or a seed/default value if none has yet been
      * emitted) and then continues to emit any other items emitted later by the source Observable(s).
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
 
-        BehaviorSubject<Integer> source = BehaviorSubject.createDefault(-1);
+        BehaviorSubject<Integer> source = BehaviorSubject.create();
 
-        source.subscribe(getObserver("First")); // it will get -1, 1, 2, 3, 4 and onComplete
+        source.subscribe(getFirstObserver()); // it will get 1, 2, 3, 4 and onComplete
 
         source.onNext(1);
         source.onNext(2);
@@ -27,13 +56,76 @@ protected void doSomeWork() {
         /*
          * it will emit 3(last emitted), 4 and onComplete for second observer also.
          */
-        source.subscribe(getObserver("Second"));
+        source.subscribe(getSecondObserver());
 
         source.onNext(4);
         source.onComplete();
 
-        source.subscribe(getObserver("Third"));
+    }
+
+
+    private Observer<Integer> getFirstObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" First onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" First onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" First onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onComplete");
+            }
+        };
+    }
+
+    private Observer<Integer> getSecondObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
+                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
+                textView.append(AppConstant.LINE_SEPARATOR);
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" Second onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" Second onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onError : " + e.getMessage());
+            }
 
+            @Override
+            public void onComplete() {
+                textView.append(" Second onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onComplete");
+            }
+        };
     }
 
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
index f779842..ead4b70 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
@@ -1,22 +1,54 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import java.util.List;
 
 import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class BufferExampleActivity extends ExampleBaseActivity {
+public class BufferExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = BufferExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /*
      * simple example using buffer operator - bundles all emitted values into a list
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
 
+        Observable<List<String>> buffered = getObservable().buffer(3, 1);
 
-        // count = 3 means,  it takes max of three from its start index and create list
-        // skip = 1 means, it jumps one step every time
+        // 3 means,  it takes max of three from its start index and create list
+        // 1 means, it jumps one step every time
         // so the it gives the following list
         // 1 - one, two, three
         // 2 - two, three, four
@@ -24,13 +56,49 @@ protected void doSomeWork() {
         // 4 - four, five
         // 5 - five
 
-        getObservable().buffer(3, 1)
-                .subscribe(getObserver());
-
+        buffered.subscribe(getObserver());
     }
 
     private Observable<String> getObservable() {
         return Observable.just("one", "two", "three", "four", "five");
     }
 
+    private Observer<List<String>> getObserver() {
+        return new Observer<List<String>>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(List<String> stringList) {
+                textView.append(" onNext size : " + stringList.size());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext : size :" + stringList.size());
+                for (String value : stringList) {
+                    textView.append(" value : " + value);
+                    textView.append(AppConstant.LINE_SEPARATOR);
+                    Log.d(TAG, " : value :" + value);
+                }
+
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
index 3089d8e..1f7451a 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
@@ -1,39 +1,52 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
 
-import java.util.Random;
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import java.util.concurrent.TimeUnit;
 
 import io.reactivex.Completable;
-import io.reactivex.CompletableEmitter;
-import io.reactivex.CompletableOnSubscribe;
+import io.reactivex.CompletableObserver;
 import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class CompletableObserverExampleActivity extends ExampleBaseActivity {
+public class CompletableObserverExampleActivity extends AppCompatActivity {
 
-    /*
-     * simple example using CompletableObserver
-     * Completable does not consist of onNext()
-     */
-    protected void doSomeWork() {
+    private static final String TAG = CompletableObserverExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
 
-        Completable completable = Completable.create(new CompletableOnSubscribe() {
+        btn.setOnClickListener(new View.OnClickListener() {
             @Override
-            public void subscribe(CompletableEmitter e) throws Exception {
-                if (!e.isDisposed()) {
-                    int randomInt = new Random().nextInt(10);
-                    if (randomInt % 2 == 0) {
-                        e.onComplete();
-                    } else {
-                        e.onError(new IllegalStateException("Can't complete because an error has occurred."));
-                    }
-                }
+            public void onClick(View view) {
+                doSomeWork();
             }
         });
+    }
+
+    /*
+     * simple example using CompletableObserver
+     */
+    private void doSomeWork() {
+        Completable completable = Completable.timer(1000, TimeUnit.MILLISECONDS);
 
         completable
                 .subscribeOn(Schedulers.io())
@@ -42,5 +55,27 @@ public void subscribe(CompletableEmitter e) throws Exception {
                 .subscribe(getCompletableObserver());
     }
 
+    private CompletableObserver getCompletableObserver() {
+        return new CompletableObserver() {
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+        };
+    }
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
index 2899ef5..ce4a3f5 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
@@ -1,13 +1,42 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class ConcatExampleActivity extends ExampleBaseActivity {
+public class ConcatExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = ConcatExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /*
      * Using concat operator to combine Observable : concat maintain
@@ -15,9 +44,9 @@ public class ConcatExampleActivity extends ExampleBaseActivity {
      * It will emit all the 7 values in order
      * here - first "A1", "A2", "A3", "A4" and then "B1", "B2", "B3"
      * first all from the first Observable and then
-     * all from the second Observable, all in order
+     * all from the second Observable all in order
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
         final String[] aStrings = {"A1", "A2", "A3", "A4"};
         final String[] bStrings = {"B1", "B2", "B3"};
 
@@ -29,4 +58,36 @@ protected void doSomeWork() {
     }
 
 
+    private Observer<String> getObserver() {
+        return new Observer<String>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(String value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext : value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
index 64c7306..d0f9802 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
@@ -1,29 +1,55 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import java.util.concurrent.TimeUnit;
 
 import io.reactivex.Observable;
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 22/12/16.
  */
 
-public class DebounceExampleActivity extends ExampleBaseActivity {
+public class DebounceExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = DebounceExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /*
     * Using debounce() -> only emit an item from an Observable if a particular time-span has
     * passed without it emitting another item, so it will emit 2, 4, 5 as we have simulated it.
     */
-    protected void doSomeWork() {
-
-        //debounce 是发射所有 时间片段 交集 中最后一个元素。
-        //这里的时间片段是指每次发射元素的当前时刻+超时时间形成的时间片段
+    private void doSomeWork() {
         getObservable()
                 .debounce(500, TimeUnit.MILLISECONDS)
                 // Run on a background thread
@@ -49,20 +75,42 @@ public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                 emitter.onNext(5); // deliver
                 Thread.sleep(510);
                 emitter.onComplete();
-
-                /*
-                分析如下：
-                1和2在400毫秒处有交集，所以1被扔掉。
-                2和3之间有500毫秒的间隔，没有交集，所以2被发射出去。
-                3在905毫秒出准备发射，但是紧接着4在1005毫秒处也要准备发射，所以3和4有交集，3被扔掉。
-                4和5之间有605毫秒的间隔，没有交集，所以4被发射出去。
-                5在接下来的500毫秒内没有和其他元素有交集，所以发射出去。
-                （如还不明白，建议在纸上画出各个元素的时间片段）
-                s*/
-
             }
         });
     }
 
+    private Observer<Integer> getObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" onNext : ");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                textView.append(" value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext ");
+                Log.d(TAG, " value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
index 2c86e4f..4aed8c6 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
@@ -1,26 +1,54 @@
 package com.rxjava2.android.samples.ui.operators;
 
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.model.Car;
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
 
 /**
  * Created by amitshekhar on 30/08/16.
  */
-public class DeferExampleActivity extends ExampleBaseActivity {
+public class DeferExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = DeferExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /*
      * Defer used for Deferring Observable code until subscription in RxJava
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
 
         Car car = new Car();
 
         Observable<String> brandDeferObservable = car.brandDeferObservable();
 
-        car.setBrand("BMW");
-        // Even if we are setting the brand after creating Observable
+        car.setBrand("BMW");  // Even if we are setting the brand after creating Observable
         // we will get the brand as BMW.
         // If we had not used defer, we would have got null as the brand.
 
@@ -28,5 +56,36 @@ protected void doSomeWork() {
                 .subscribe(getObserver());
     }
 
+    private Observer<String> getObserver() {
+        return new Observer<String>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(String value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext : value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java
index 134d562..2dd124b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java
@@ -1,8 +1,15 @@
 package com.rxjava2.android.samples.ui.operators;
 
+import android.os.Bundle;
 import android.os.SystemClock;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import java.util.concurrent.Callable;
 
@@ -10,15 +17,34 @@
 import io.reactivex.ObservableSource;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.observers.DisposableObserver;
 import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class DisposableExampleActivity extends ExampleBaseActivity {
+public class DisposableExampleActivity extends AppCompatActivity {
 
+    private static final String TAG = DisposableExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
     private final CompositeDisposable disposables = new CompositeDisposable();
 
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
     @Override
     protected void onDestroy() {
         super.onDestroy();
@@ -29,13 +55,34 @@ protected void onDestroy() {
      * Example to understand how to use disposables.
      * disposables is cleared in onDestroy of this activity.
      */
-    protected void doSomeWork() {
+    void doSomeWork() {
         disposables.add(sampleObservable()
                 // Run on a background thread
                 .subscribeOn(Schedulers.io())
                 // Be notified on the main thread
                 .observeOn(AndroidSchedulers.mainThread())
-                .subscribeWith(this.<String>getDisposableObserver()));
+                .subscribeWith(new DisposableObserver<String>() {
+                    @Override
+                    public void onComplete() {
+                        textView.append(" onComplete");
+                        textView.append(AppConstant.LINE_SEPARATOR);
+                        Log.d(TAG, " onComplete");
+                    }
+
+                    @Override
+                    public void onError(Throwable e) {
+                        textView.append(" onError : " + e.getMessage());
+                        textView.append(AppConstant.LINE_SEPARATOR);
+                        Log.d(TAG, " onError : " + e.getMessage());
+                    }
+
+                    @Override
+                    public void onNext(String value) {
+                        textView.append(" onNext : value : " + value);
+                        textView.append(AppConstant.LINE_SEPARATOR);
+                        Log.d(TAG, " onNext value : " + value);
+                    }
+                }));
     }
 
     static Observable<String> sampleObservable() {
@@ -49,4 +96,3 @@ public ObservableSource<? extends String> call() throws Exception {
         });
     }
 }
-
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
index 555685f..76665ec 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
@@ -1,20 +1,81 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
 
 /**
  * Created by techteam on 13/09/16.
  */
-public class DistinctExampleActivity extends ExampleBaseActivity {
+public class DistinctExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = DistinctExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+
+    private void doSomeWork() {
+
+        getObservable()
+                .distinct()
+                .subscribe(getObserver());
+    }
+
+    private Observable<Integer> getObservable() {
+        return Observable.just(1, 2, 1, 1, 2, 3, 4, 6, 4);
+    }
+
+
+    private Observer<Integer> getObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
 
-  protected void doSomeWork(){
-     getObservable().distinct() .subscribe(getObserver());
-  }
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext value : " + value);
+            }
 
-  private Observable<Integer> getObservable() {
-    return Observable.just(1, 2, 1, 1, 2, 3, 4 ,6, 4);
-  }
+            @Override
+            public void onError(Throwable e) {
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
 
-}
+            @Override
+            public void onComplete() {
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java
index 6777e4e..e470182 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java
@@ -1,20 +1,50 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.functions.Predicate;
 
+
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class FilterExampleActivity extends ExampleBaseActivity {
+public class FilterExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = FilterExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /*
      * simple example by using filter operator to emit only even value
      *
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
         Observable.just(1, 2, 3, 4, 5, 6)
                 .filter(new Predicate<Integer>() {
                     @Override
@@ -25,4 +55,40 @@ public boolean test(Integer integer) throws Exception {
                 .subscribe(getObserver());
     }
 
+
+    private Observer<Integer> getObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" onNext : ");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                textView.append(" value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext ");
+                Log.d(TAG, " value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
index b80da45..7303cc2 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
@@ -1,70 +1,81 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
 
-import org.reactivestreams.Subscriber;
-import org.reactivestreams.Subscription;
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Flowable;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.SingleObserver;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.functions.BiFunction;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class FlowableExampleActivity extends ExampleBaseActivity {
+public class FlowableExampleActivity extends AppCompatActivity {
 
-    private Subscription mSubscription;
+    private static final String TAG = FlowableExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /*
      * simple example using Flowable
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
 
-        if (mSubscription != null) {
-            mSubscription.cancel();
-        }
+        Flowable<Integer> observable = Flowable.just(1, 2, 3, 4);
 
-        Flowable.range(0, 20)
-                .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribeWith(new Subscriber<Integer>() {
+        observable.reduce(50, new BiFunction<Integer, Integer, Integer>() {
+            @Override
+            public Integer apply(Integer t1, Integer t2) {
+                return t1 + t2;
+            }
+        }).subscribe(getObserver());
 
-                    //当订阅后，会首先调用这个方法，其实就相当于onStart()，
-                    //传入的Subscription s参数可以用于请求数据或者取消订阅
-                    @Override
-                    public void onSubscribe(Subscription s) {
-                        FlowableExampleActivity.this.onSubscribe("", null);
-                        mSubscription = s;
-                        //要说明一下，request这个方法若不调用,下游的onNext与OnComplete都不会调用；
-                        // 若你写的数量小于真实数据量，只会传你的个数，而且不会调用onComplete方法（毕竟没有传完嘛，当然没有complete）
-                        mSubscription.request(1);
-                    }
-
-                    @Override
-                    public void onNext(Integer o) {
-                        FlowableExampleActivity.this.onNext("", o);
-                        mSubscription.request(1);
-                    }
+    }
 
-                    @Override
-                    public void onError(Throwable t) {
-                        FlowableExampleActivity.this.onError("", t);
-                    }
+    private SingleObserver<Integer> getObserver() {
 
-                    @Override
-                    public void onComplete() {
-                        FlowableExampleActivity.this.onComplete("");
-                    }
-                });
+        return new SingleObserver<Integer>() {
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
 
-    }
+            @Override
+            public void onSuccess(Integer value) {
+                textView.append(" onSuccess : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onSuccess : value : " + value);
+            }
 
-    @Override
-    protected void onDestroy() {
-        if (mSubscription != null) {
-            mSubscription.cancel();
-        }
-        super.onDestroy();
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+        };
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
index b516456..22469be 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
@@ -1,21 +1,48 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import java.util.concurrent.TimeUnit;
 
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.observers.DisposableObserver;
 import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class IntervalExampleActivity extends ExampleBaseActivity {
+public class IntervalExampleActivity extends AppCompatActivity {
 
+    private static final String TAG = IntervalExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
     private final CompositeDisposable disposables = new CompositeDisposable();
 
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
     @Override
     protected void onDestroy() {
         super.onDestroy();
@@ -26,17 +53,44 @@ protected void onDestroy() {
      * simple example using interval to run task at an interval of 2 sec
      * which start immediately
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
         disposables.add(getObservable()
                 // Run on a background thread
                 .subscribeOn(Schedulers.io())
                 // Be notified on the main thread
                 .observeOn(AndroidSchedulers.mainThread())
-                .subscribeWith(this.getDisposableObserver()));
+                .subscribeWith(getObserver()));
     }
 
     private Observable<? extends Long> getObservable() {
         return Observable.interval(0, 2, TimeUnit.SECONDS);
     }
 
+    private DisposableObserver<Long> getObserver() {
+        return new DisposableObserver<Long>() {
+
+            @Override
+            public void onNext(Long value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext : value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
index 2222afb..3b0282c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
@@ -1,22 +1,76 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Observable;
+import io.reactivex.SingleObserver;
+import io.reactivex.disposables.Disposable;
 
 /**
  * Created by techteam on 13/09/16.
  */
-public class LastOperatorExampleActivity extends ExampleBaseActivity {
+public class LastOperatorExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = DistinctExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
-    protected void doSomeWork() {
-        getObservable()
-                .last("Default") // the default item ("Default") to emit if the source ObservableSource is empty
-                .subscribe(this.<String>getSingleObserver());
+    private void doSomeWork() {
+        getObservable().last("A1") // the default item ("A1") to emit if the source ObservableSource is empty
+                .subscribe(getObserver());
     }
 
     private Observable<String> getObservable() {
         return Observable.just("A1", "A2", "A3", "A4", "A5", "A6");
     }
 
+    private SingleObserver<String> getObserver() {
+        return new SingleObserver<String>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onSuccess(String value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext value : " + value);
+            }
+
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+        };
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
index 3e4c2bc..0b50c1c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
@@ -1,8 +1,16 @@
 package com.rxjava2.android.samples.ui.operators;
 
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.model.ApiUser;
 import com.rxjava2.android.samples.model.User;
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import com.rxjava2.android.samples.utils.AppConstant;
 import com.rxjava2.android.samples.utils.Utils;
 
 import java.util.List;
@@ -10,14 +18,35 @@
 import io.reactivex.Observable;
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.functions.Function;
 import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class MapExampleActivity extends ExampleBaseActivity {
+public class MapExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = MapExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /*
     * Here we are getting ApiUser Object from api server
@@ -25,7 +54,7 @@ public class MapExampleActivity extends ExampleBaseActivity {
     * may be our database support User Not ApiUser Object
     * Here we are using Map Operator to do that
     */
-    protected void doSomeWork() {
+    private void doSomeWork() {
         getObservable()
                 // Run on a background thread
                 .subscribeOn(Schedulers.io())
@@ -53,4 +82,40 @@ public void subscribe(ObservableEmitter<List<ApiUser>> e) throws Exception {
         });
     }
 
+    private Observer<List<User>> getObserver() {
+        return new Observer<List<User>>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(List<User> userList) {
+                textView.append(" onNext");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                for (User user : userList) {
+                    textView.append(" firstName : " + user.firstName);
+                    textView.append(AppConstant.LINE_SEPARATOR);
+                }
+                Log.d(TAG, " onNext : " + userList.size());
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java
index 0ef4fe2..0cd7487 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java
@@ -1,20 +1,50 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
 
 /**
  * Created by amitshekhar on 28/08/16.
  */
-public class MergeExampleActivity extends ExampleBaseActivity {
+public class MergeExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = MergeExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
     /*
      * Using merge operator to combine Observable : merge does not maintain
      * the order of Observable.
      * It will emit all the 7 values may not be in order
      * Ex - "A1", "B1", "A2", "A3", "A4", "B2", "B3" - may be anything
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
         final String[] aStrings = {"A1", "A2", "A3", "A4"};
         final String[] bStrings = {"B1", "B2", "B3"};
 
@@ -25,4 +55,37 @@ protected void doSomeWork() {
                 .subscribe(getObserver());
     }
 
+
+    private Observer<String> getObserver() {
+        return new Observer<String>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(String value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext : value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
index a7e31f6..af8822c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
@@ -1,41 +1,131 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
 
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.subjects.PublishSubject;
 
 /**
  * Created by amitshekhar on 17/12/16.
  */
 
-public class PublishSubjectExampleActivity extends ExampleBaseActivity {
+public class PublishSubjectExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = PublishSubjectExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /* PublishSubject emits to an observer only those items that are emitted
-    * by the source Observable, subsequent to the time of the subscription.
-    */
-    protected void doSomeWork() {
+     * by the source Observable, subsequent to the time of the subscription.
+     */
+    private void doSomeWork() {
 
-        //PublishSubject就像鼠标事件，不管有没有订阅者，他都按照他的设定发事件，什么时候有订阅者，那么订阅者就从那个时候获取事件。
-        //与之相反的是ReplaySubject,不管订阅者什么时候订阅，都能获取完整事件。
         PublishSubject<Integer> source = PublishSubject.create();
-        source.onNext(-1);
-        source.onNext(0);
 
-        source.subscribe(this.<Integer>getObserver("First")); // it will get 1, 2, 3, 4 and onComplete
+        source.subscribe(getFirstObserver()); // it will get 1, 2, 3, 4 and onComplete
 
         source.onNext(1);
         source.onNext(2);
         source.onNext(3);
-        //source.onComplete();//如果在这里onComplete了，那么后面的订阅者只能收到onComplete事件
 
         /*
          * it will emit 4 and onComplete for second observer also.
          */
-        source.subscribe(this.<Integer>getObserver("Second"));
+        source.subscribe(getSecondObserver());
 
         source.onNext(4);
         source.onComplete();
 
     }
 
+
+    private Observer<Integer> getFirstObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" First onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" First onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" First onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onComplete");
+            }
+        };
+    }
+
+    private Observer<Integer> getSecondObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
+                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
+                textView.append(AppConstant.LINE_SEPARATOR);
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" Second onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" Second onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" Second onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onComplete");
+            }
+        };
+    }
+
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java
index 0722028..1ab9930 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java
@@ -1,18 +1,48 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
 
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import io.reactivex.MaybeObserver;
 import io.reactivex.Observable;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.functions.BiFunction;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class ReduceExampleActivity extends ExampleBaseActivity {
+public class ReduceExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = ReduceExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
     /*
      * simple example using reduce to add all the number
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
         getObservable()
                 .reduce(new BiFunction<Integer, Integer, Integer>() {
                     @Override
@@ -20,12 +50,42 @@ public Integer apply(Integer t1, Integer t2) {
                         return t1 + t2;
                     }
                 })
-                .subscribe(this.<Integer>getMaybeObserver());
+                .subscribe(getObserver());
     }
 
     private Observable<Integer> getObservable() {
         return Observable.just(1, 2, 3, 4);
     }
 
+    private MaybeObserver<Integer> getObserver() {
+        return new MaybeObserver<Integer>() {
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onSuccess(Integer value) {
+                textView.append(" onSuccess : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onSuccess : value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
index 72ed85c..8880ea9 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
@@ -1,27 +1,54 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
 
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.observables.ConnectableObservable;
 import io.reactivex.subjects.PublishSubject;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class ReplayExampleActivity extends ExampleBaseActivity {
+public class ReplayExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = ReplayExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /* Using replay operator, replay ensure that all observers see the same sequence
      * of emitted items, even if they subscribe after the Observable has begun emitting items
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
 
         PublishSubject<Integer> source = PublishSubject.create();
         ConnectableObservable<Integer> connectableObservable = source.replay(3); // bufferSize = 3 to retain 3 values to replay
         connectableObservable.connect(); // connecting the connectableObservable
 
-        source.onNext(-1);
-        source.onNext(0);
-        connectableObservable.subscribe(this.<Integer>getObserver("First"));
+        connectableObservable.subscribe(getFirstObserver());
 
         source.onNext(1);
         source.onNext(2);
@@ -29,15 +56,74 @@ protected void doSomeWork() {
         source.onNext(4);
         source.onComplete();
 
-
         /*
-         * Replay操作符会给onComplete后订阅Observable的订阅者Replay发射最后几个元素。
-         * 在onComplete之前订阅的不受影响（会收到完整的元素。哪怕在订阅之前已经开始onNext数据了）
-         *
          * it will emit 2, 3, 4 as (count = 3), retains the 3 values for replay
          */
-        connectableObservable.subscribe(this.<Integer>getObserver("Second"));
+        connectableObservable.subscribe(getSecondObserver());
+
+    }
+
+
+    private Observer<Integer> getFirstObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" First onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" First onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" First onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onComplete");
+            }
+        };
+    }
+
+    private Observer<Integer> getSecondObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
+                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
+                textView.append(AppConstant.LINE_SEPARATOR);
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" Second onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" Second onError : " + e.getMessage());
+                Log.d(TAG, " Second onError : " + e.getMessage());
+            }
 
+            @Override
+            public void onComplete() {
+                textView.append(" Second onComplete");
+                Log.d(TAG, " Second onComplete");
+            }
+        };
     }
 
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
index 7692494..7f09563 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
@@ -1,45 +1,129 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
 
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.subjects.ReplaySubject;
 
 /**
  * Created by amitshekhar on 17/12/16.
  */
 
-public class ReplaySubjectExampleActivity extends ExampleBaseActivity {
+public class ReplaySubjectExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = ReplaySubjectExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /* ReplaySubject emits to any observer all of the items that were emitted
      * by the source Observable, regardless of when the observer subscribes.
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
 
-        //ReplaySubject 和 PublishSubject相反，
-        //ReplaySubject不管订阅者什么时候订阅都能获取到完整的发射数据。
-        //而PublishSubject会一直按照自己的步调发射数据，你在哪订阅就从这个时间点开始才能获取到事件
-        //所谓的完整数据指的是从第一个onNext 一直到 onComplete 或 onError
         ReplaySubject<Integer> source = ReplaySubject.create();
 
-
-        source.onNext(-1);
-        source.onNext(0);
-
-        source.subscribe(this.<Integer>getObserver("First")); // it will get -1, 0, 1, 2, 3, 4, 5
+        source.subscribe(getFirstObserver()); // it will get 1, 2, 3, 4
 
         source.onNext(1);
         source.onNext(2);
         source.onNext(3);
         source.onNext(4);
+        source.onComplete();
 
         /*
-         * it will emit -1, 0, 1, 2, 3, 4, 5 for second observer also as we have used replay
+         * it will emit 1, 2, 3, 4 for second observer also as we have used replay
          */
-        source.subscribe(this.<Integer>getObserver("Second"));
+        source.subscribe(getSecondObserver());
 
-        source.onNext(5);
-        source.onComplete();
+    }
+
+
+    private Observer<Integer> getFirstObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " First onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" First onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" First onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" First onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " First onComplete");
+            }
+        };
+    }
+
+    private Observer<Integer> getSecondObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                textView.append(" Second onSubscribe : isDisposed :" + d.isDisposed());
+                Log.d(TAG, " Second onSubscribe : " + d.isDisposed());
+                textView.append(AppConstant.LINE_SEPARATOR);
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" Second onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" Second onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onError : " + e.getMessage());
+            }
 
+            @Override
+            public void onComplete() {
+                textView.append(" Second onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " Second onComplete");
+            }
+        };
     }
 
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
index 100bcd6..f70e667 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
@@ -1,18 +1,45 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Observable;
+import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.functions.BiFunction;
 import io.reactivex.schedulers.Schedulers;
 
-public class ScanExampleActivity extends ExampleBaseActivity {
+public class ScanExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = ScanExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
 
-    /* Using scan operator, apply a function to each item emitted by an Observable,
-    * sequentially, and emit each successive value
-    */
-    protected void doSomeWork() {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /* Using scan operator, it sends also the previous result */
+    private void doSomeWork() {
         getObservable()
                 // Run on a background thread
                 .subscribeOn(Schedulers.io())
@@ -25,11 +52,42 @@ public Integer apply(Integer int1, Integer int2) throws Exception {
                     }
                 })
                 .subscribe(getObserver());
-        //Scan又叫累加器。将原始第一个与第二个应用函数的值作为第二个发射出去数据（第一个发射的数据就是原始第一个数据）
-        //第三个发射的数据是原始第三个与第二个发射出去的应用函数后的值。
     }
 
     private Observable<Integer> getObservable() {
         return Observable.just(1, 2, 3, 4, 5);
     }
+
+    private Observer<Integer> getObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java
index 694c858..423047d 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java
@@ -1,20 +1,49 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Observable;
+import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class SimpleExampleActivity extends ExampleBaseActivity {
+public class SimpleExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = SimpleExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /*
      * simple example to emit two value one by one
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
         getObservable()
                 // Run on a background thread
                 .subscribeOn(Schedulers.io())
@@ -27,5 +56,36 @@ private Observable<String> getObservable() {
         return Observable.just("Cricket", "Football");
     }
 
+    private Observer<String> getObserver() {
+        return new Observer<String>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(String value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext : value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
index 5155e05..6c9ce7c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
@@ -1,47 +1,72 @@
 package com.rxjava2.android.samples.ui.operators;
 
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
 import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Single;
-import io.reactivex.SingleEmitter;
-import io.reactivex.SingleOnSubscribe;
-import io.reactivex.functions.Consumer;
-import io.reactivex.functions.Function;
+import io.reactivex.SingleObserver;
+import io.reactivex.disposables.Disposable;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class SingleObserverExampleActivity extends ExampleBaseActivity {
+public class SingleObserverExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = SingleObserverExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /*
      * simple example using SingleObserver
      */
-    protected void doSomeWork() {
-        Single.create(new SingleOnSubscribe<String>() {
-            @Override
-            public void subscribe(SingleEmitter<String> e) throws Exception {
-                if (!e.isDisposed()) {
-                    e.onSuccess("Hello Success!");
-                }
-            }
-        }).doOnSuccess(new Consumer<String>() {
+    private void doSomeWork() {
+        Single.just("Amit")
+                .subscribe(getSingleObserver());
+    }
+
+    private SingleObserver<String> getSingleObserver() {
+        return new SingleObserver<String>() {
             @Override
-            public void accept(String s) throws Exception {
-                Log.d(TAG, "doOnSuccess: " + s);
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
             }
-        }).doOnError(new Consumer<Throwable>() {
+
             @Override
-            public void accept(Throwable throwable) throws Exception {
-                Log.e(TAG, "doOnError: " + throwable.getMessage());
+            public void onSuccess(String value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext value : " + value);
             }
-        }).onErrorReturn(new Function<Throwable, String>() {
+
             @Override
-            public String apply(Throwable throwable) throws Exception {
-                return "Exception message: " + throwable.getMessage();
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
             }
-        }).subscribe(getSingleObserver());
+        };
     }
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
index de1cf11..301de52 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
@@ -1,20 +1,49 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Observable;
+import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class SkipExampleActivity extends ExampleBaseActivity {
+public class SkipExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = SkipExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /* Using skip operator, it only not emit
     * the first 2 values.
     */
-    protected void doSomeWork() {
+    private void doSomeWork() {
         getObservable()
                 // Run on a background thread
                 .subscribeOn(Schedulers.io())
@@ -28,4 +57,36 @@ private Observable<Integer> getObservable() {
         return Observable.just(1, 2, 3, 4, 5);
     }
 
+    private Observer<Integer> getObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java
index 651b2c2..ae71924 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java
@@ -1,21 +1,49 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import io.reactivex.Observable;
+import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class TakeExampleActivity extends ExampleBaseActivity {
+public class TakeExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = TakeExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
 
-    /*
-    * Using take operator, it only emits
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /* Using take operator, it only emits
     * required number of values. here only 3 out of 5
     */
-    protected void doSomeWork() {
+    private void doSomeWork() {
         getObservable()
                 // Run on a background thread
                 .subscribeOn(Schedulers.io())
@@ -29,4 +57,36 @@ private Observable<Integer> getObservable() {
         return Observable.just(1, 2, 3, 4, 5);
     }
 
+    private Observer<Integer> getObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
index 1872a64..28c6ae7 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
@@ -1,13 +1,23 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import java.util.concurrent.TimeUnit;
 
 import io.reactivex.Observable;
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.schedulers.Schedulers;
 
 
@@ -15,9 +25,33 @@
  * Created by threshold on 2017/1/11.
  */
 
-public class ThrottleFirstExampleActivity extends ExampleBaseActivity {
+public class ThrottleFirstExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = ThrottleFirstExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
 
-    protected void doSomeWork() {
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /*
+    * Using throttleFirst() -> if the source Observable has emitted no items since
+    * the last time it was sampled, the Observable that results from this operator
+    * will emit no item for that sampling period.
+    */
+    private void doSomeWork() {
         getObservable()
                 .throttleFirst(500, TimeUnit.MILLISECONDS)
                 // Run on a background thread
@@ -46,13 +80,42 @@ public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                 emitter.onNext(7); // deliver
                 Thread.sleep(510);
                 emitter.onComplete();
-                /*
-                0----------500-------------1000----------1500
-                0------------505--604--704--1009----------1519
-                1,2-----------3----4---5,6----7-----------Complete
-                 */
             }
         });
     }
 
-}
+    private Observer<Integer> getObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" onNext : ");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                textView.append(" value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext ");
+                Log.d(TAG, " value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
index e2689b3..ff52082 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
@@ -1,29 +1,58 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import java.util.concurrent.TimeUnit;
 
 import io.reactivex.Observable;
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 22/12/16.
  */
 
-public class ThrottleLastExampleActivity extends ExampleBaseActivity {
+public class ThrottleLastExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = ThrottleLastExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /*
     * Using throttleLast() -> emit the most recent items emitted by an Observable within
     * periodic time intervals, so here it will emit 2, 6 and 7 as we have simulated it to be the
     * last the element in the interval of 500 millis
     */
-    protected void doSomeWork() {
+    private void doSomeWork() {
         getObservable()
-                .throttleLast(500, TimeUnit.MILLISECONDS)
+                .throttleFirst(500, TimeUnit.MILLISECONDS)
                 // Run on a background thread
                 .subscribeOn(Schedulers.io())
                 // Be notified on the main thread
@@ -50,13 +79,42 @@ public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                 emitter.onNext(7); // deliver
                 Thread.sleep(510);
                 emitter.onComplete();
-                /*
-                0----------500-------------1000----------1500
-                0------------505--604--704--1009----------1519
-                1,2-----------3----4---5,6----7-----------Complete
-                 */
             }
         });
     }
 
+    private Observer<Integer> getObserver() {
+        return new Observer<Integer>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Integer value) {
+                textView.append(" onNext : ");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                textView.append(" value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext ");
+                Log.d(TAG, " value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java
index 13a3b51..17f6369 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java
@@ -1,22 +1,51 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
 
 import java.util.concurrent.TimeUnit;
 
 import io.reactivex.Observable;
+import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class TimerExampleActivity extends ExampleBaseActivity {
+public class TimerExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = TimerExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
 
     /*
      * simple example using timer to do something after 2 second
      */
-    protected void doSomeWork() {
+    private void doSomeWork() {
         getObservable()
                 // Run on a background thread
                 .subscribeOn(Schedulers.io())
@@ -26,8 +55,39 @@ protected void doSomeWork() {
     }
 
     private Observable<? extends Long> getObservable() {
-        //延迟2秒后发射一个0.
-        // timer就是定时器，到点后仅发射一个0
         return Observable.timer(2, TimeUnit.SECONDS);
     }
+
+    private Observer<Long> getObserver() {
+        return new Observer<Long>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Long value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext : value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
index aced36b..672d3ce 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
@@ -1 +1 @@
-package com.rxjava2.android.samples.ui.operators;

import android.util.Log;

import com.rxjava2.android.samples.ui.ExampleBaseActivity;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends ExampleBaseActivity {

    /*
     * Example using window operator -> It periodically
     * subdivide items from an Observable into
     * Observable windows and emit these windows rather than
     * emitting the items one at a time
     */
    protected void doSomeWork() {

        Observable.interval(1, TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer<Observable<Long>>() {
                    @Override
                    public void accept(Observable<Long> observable) {
                        Log.d(TAG, "Sub Divide begin....");
                        textView.append("Sub Divide begin ....");
                        textView.append(AppConstant.LINE_SEPARATOR);
                        observable
                                .subscribeOn(Schedulers.io())
                                .observeOn(AndroidSchedulers.mainThread())
                                .subscribe(new Consumer<Long>() {
                                    @Override
                                    public void accept(Long value) {
                                        Log.d(TAG, "Next:" + value);
                                        textView.append("Next:" + value);
                                        textView.append(AppConstant.LINE_SEPARATOR);
                                    }
                                });
                    }
                });
    }
}
\ No newline at end of file
+package com.rxjava2.android.samples.ui.operators;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.rxjava2.android.samples.R;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends AppCompatActivity {

    private static final String TAG = WindowExampleActivity.class.getSimpleName();
    Button btn;
    TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_example);
        btn = (Button) findViewById(R.id.btn);
        textView = (TextView) findViewById(R.id.textView);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                doSomeWork();
            }
        });
    }


    /*
     * Example using window operator -> It periodically
     * subdivide items from an Observable into
     * Observable windows and emit these windows rather than
     * emitting the items one at a time
     */
    protected void doSomeWork() {

        Observable.interval(1, TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(getConsumer());
    }

    public Consumer<Observable<Long>> getConsumer() {
        return new Consumer<Observable<Long>>() {
            @Override
            public void accept(Observable<Long> observable) throws Exception {
                Log.d(TAG, "Sub Divide begin....");
                textView.append("Sub Divide begin ....");
                textView.append(AppConstant.LINE_SEPARATOR);
                observable
                        .subscribeOn(Schedulers.io())
                        .observeOn(AndroidSchedulers.mainThread())
                        .subscribe(new Consumer<Long>() {
                            @Override
                            public void accept(Long value) {
                                Log.d(TAG, "Next:" + value);
                                textView.append("Next:" + value);
                                textView.append(AppConstant.LINE_SEPARATOR);
                            }
                        });
            }
        };
    }
}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
index 5aa860a..fa91c1e 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
@@ -1,7 +1,15 @@
 package com.rxjava2.android.samples.ui.operators;
 
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.model.User;
-import com.rxjava2.android.samples.ui.ExampleBaseActivity;
+import com.rxjava2.android.samples.utils.AppConstant;
 import com.rxjava2.android.samples.utils.Utils;
 
 import java.util.List;
@@ -9,21 +17,43 @@
 import io.reactivex.Observable;
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
 import io.reactivex.functions.BiFunction;
 import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 27/08/16.
  */
-public class ZipExampleActivity extends ExampleBaseActivity {
+public class ZipExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = ZipExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
     /*
     * Here we are getting two user list
     * One, the list of cricket fans
     * Another one, the list of football fans
     * Then we are finding the list of users who loves both
     */
-    protected void doSomeWork() {
+    private void doSomeWork() {
         Observable.zip(getCricketFansObservable(), getFootballFansObservable(),
                 new BiFunction<List<User>, List<User>, List<User>>() {
                     @Override
@@ -62,4 +92,40 @@ public void subscribe(ObservableEmitter<List<User>> e) throws Exception {
         });
     }
 
+    private Observer<List<User>> getObserver() {
+        return new Observer<List<User>>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(List<User> userList) {
+                textView.append(" onNext");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                for (User user : userList) {
+                    textView.append(" firstName : " + user.firstName);
+                    textView.append(AppConstant.LINE_SEPARATOR);
+                }
+                Log.d(TAG, " onNext : " + userList.size());
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
 }
\ No newline at end of file

From 73ea4458ed49b1bf0a00312bafb1c885ca9d4dd8 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 3 Feb 2017 20:09:04 +0530
Subject: [PATCH 048/137] Update README.md

---
 README.md        | 3 +++
 app/build.gradle | 6 ++----
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index cd64da2..c382f64 100644
--- a/README.md
+++ b/README.md
@@ -99,6 +99,9 @@ RxJava1 -> RxJava2
 ### Find this project useful ? :heart:
 * Support it by clicking the :star: button on the upper right of this page. :v:
 
+### Check out an awesome MVP architecture based project which uses RxJava2, Dagger2.
+* [Android-MVP-Architecture](https://github.com/MindorksOpenSource/android-mvp-architecture)
+
 ### Check out an awesome library for fast and simple networking in Android.
 * [Fast Android Networking Library](https://github.com/amitshekhariitbhu/Fast-Android-Networking)
 
diff --git a/app/build.gradle b/app/build.gradle
index c3c8d89..8e8ceee 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,8 +23,6 @@ dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:25.1.0'
-    compile 'io.reactivex.rxjava2:rxjava:2.0.4'
-    compile('io.reactivex.rxjava2:rxandroid:2.0.1'){
-        exclude group: 'io.reactivex.rxjava2', module: 'rxjava'
-    }
+    compile 'io.reactivex.rxjava2:rxjava:2.0.5'
+    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
 }

From e977a8e3e7f9124fc21a513d8c6f280320ce4e60 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 3 Feb 2017 20:09:16 +0530
Subject: [PATCH 049/137] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index c382f64..9032b32 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Users switching from 1.x to 2.x have to re-organize their imports, but carefully
 
 Add this in your build.gradle
 ```groovy
-compile 'io.reactivex.rxjava2:rxjava:2.0.4'
+compile 'io.reactivex.rxjava2:rxjava:2.0.5'
 ```
 If you are using RxAndroid also, then add the following
 ```groovy

From 64284c2e2d14c0d9a1d008952c357233794db3f1 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 3 Feb 2017 20:30:15 +0530
Subject: [PATCH 050/137] Operator correction

---
 .../android/samples/ui/operators/SkipExampleActivity.java       | 2 +-
 .../samples/ui/operators/ThrottleLastExampleActivity.java       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
index 301de52..26706ea 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
@@ -40,7 +40,7 @@ public void onClick(View view) {
         });
     }
 
-    /* Using skip operator, it only not emit
+    /* Using skip operator, it will not emit
     * the first 2 values.
     */
     private void doSomeWork() {
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
index ff52082..95b6a45 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
@@ -52,7 +52,7 @@ public void onClick(View view) {
     */
     private void doSomeWork() {
         getObservable()
-                .throttleFirst(500, TimeUnit.MILLISECONDS)
+                .throttleLast(500, TimeUnit.MILLISECONDS)
                 // Run on a background thread
                 .subscribeOn(Schedulers.io())
                 // Be notified on the main thread

From c295df1b22ce3cb59a9a107bb03c4d6fe34428d9 Mon Sep 17 00:00:00 2001
From: insomnia <jutao@ihealthlabs.com.cn>
Date: Sat, 4 Feb 2017 13:13:54 +0800
Subject: [PATCH 051/137] fix title distinct to last in AndroidManifest.xml

---
 app/src/main/AndroidManifest.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 1542126..569dbf3 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -78,7 +78,7 @@
             android:label="@string/distinct"/>
         <activity
             android:name=".ui.operators.LastOperatorExampleActivity"
-            android:label="@string/distinct"/>
+            android:label="@string/last"/>
         <activity
             android:name=".ui.operators.ReplaySubjectExampleActivity"
             android:label="@string/replay_subject"/>

From b29ee5ce4c44d441bfba03cfc2e6f7369b321973 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 4 Feb 2017 11:42:15 +0530
Subject: [PATCH 052/137] Add Networking Activity

---
 app/src/main/AndroidManifest.xml              | 78 ++++++++++---------
 ...inActivity.java => OperatorsActivity.java} | 62 +++++++--------
 .../android/samples/ui/SelectionActivity.java | 27 +++++++
 .../ui/networking/NetworkingActivity.java     | 10 +++
 ...tivity_main.xml => activity_operators.xml} |  4 +-
 .../main/res/layout/activity_selection.xml    | 33 ++++++++
 app/src/main/res/values/strings.xml           |  2 +
 7 files changed, 148 insertions(+), 68 deletions(-)
 rename app/src/main/java/com/rxjava2/android/samples/ui/{MainActivity.java => OperatorsActivity.java} (62%)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
 rename app/src/main/res/layout/{activity_main.xml => activity_operators.xml} (99%)
 create mode 100644 app/src/main/res/layout/activity_selection.xml

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 569dbf3..eedc8f2 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          package="com.rxjava2.android.samples">
+    package="com.rxjava2.android.samples">
 
     <application
         android:name=".MyApplication"
@@ -9,98 +9,106 @@
         android:label="@string/app_name"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".ui.MainActivity">
+        <activity android:name=".ui.SelectionActivity">
             <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
+                <action android:name="android.intent.action.MAIN" />
 
-                <category android:name="android.intent.category.LAUNCHER"/>
+                <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity
+            android:name=".ui.OperatorsActivity"
+            android:label="@string/operators" />
+        <activity
+            android:name=".ui.networking.NetworkingActivity"
+            android:label="@string/networking" />
         <activity
             android:name=".ui.operators.SimpleExampleActivity"
-            android:label="@string/simple"/>
+            android:label="@string/simple" />
         <activity
             android:name=".ui.operators.MapExampleActivity"
-            android:label="@string/map"/>
+            android:label="@string/map" />
         <activity
             android:name=".ui.operators.ZipExampleActivity"
-            android:label="@string/zip"/>
+            android:label="@string/zip" />
         <activity
             android:name=".ui.operators.DisposableExampleActivity"
-            android:label="@string/disposable"/>
+            android:label="@string/disposable" />
         <activity
             android:name=".ui.operators.TakeExampleActivity"
-            android:label="@string/take"/>
+            android:label="@string/take" />
         <activity
             android:name=".ui.operators.TimerExampleActivity"
-            android:label="@string/timer"/>
+            android:label="@string/timer" />
         <activity
             android:name=".ui.operators.IntervalExampleActivity"
-            android:label="@string/interval"/>
+            android:label="@string/interval" />
         <activity
             android:name=".ui.operators.SingleObserverExampleActivity"
-            android:label="@string/SingleObserver"/>
+            android:label="@string/SingleObserver" />
         <activity
             android:name=".ui.operators.CompletableObserverExampleActivity"
-            android:label="@string/CompletableObserver"/>
+            android:label="@string/CompletableObserver" />
         <activity
             android:name=".ui.operators.FlowableExampleActivity"
-            android:label="@string/Flowable"/>
+            android:label="@string/Flowable" />
         <activity
             android:name=".ui.operators.ReduceExampleActivity"
-            android:label="@string/reduce"/>
+            android:label="@string/reduce" />
         <activity
             android:name=".ui.operators.BufferExampleActivity"
-            android:label="@string/buffer"/>
+            android:label="@string/buffer" />
         <activity
             android:name=".ui.operators.FilterExampleActivity"
-            android:label="@string/filter"/>
+            android:label="@string/filter" />
         <activity
             android:name=".ui.operators.SkipExampleActivity"
-            android:label="@string/skip"/>
+            android:label="@string/skip" />
         <activity
             android:name=".ui.operators.ScanExampleActivity"
-            android:label="@string/scan"/>
+            android:label="@string/scan" />
         <activity
             android:name=".ui.operators.ReplayExampleActivity"
-            android:label="@string/replay"/>
+            android:label="@string/replay" />
         <activity
             android:name=".ui.operators.ConcatExampleActivity"
-            android:label="@string/concat"/>
+            android:label="@string/concat" />
         <activity
             android:name=".ui.operators.MergeExampleActivity"
-            android:label="@string/merge"/>
+            android:label="@string/merge" />
         <activity
             android:name=".ui.operators.DeferExampleActivity"
-            android:label="@string/defer"/>
+            android:label="@string/defer" />
         <activity
             android:name=".ui.operators.DistinctExampleActivity"
-            android:label="@string/distinct"/>
+            android:label="@string/distinct" />
         <activity
             android:name=".ui.operators.LastOperatorExampleActivity"
-            android:label="@string/last"/>
+            android:label="@string/last" />
         <activity
             android:name=".ui.operators.ReplaySubjectExampleActivity"
-            android:label="@string/replay_subject"/>
+            android:label="@string/replay_subject" />
         <activity
             android:name=".ui.operators.PublishSubjectExampleActivity"
-            android:label="@string/publish_subject"/>
+            android:label="@string/publish_subject" />
         <activity
             android:name=".ui.operators.BehaviorSubjectExampleActivity"
-            android:label="@string/behavior_subject"/>
+            android:label="@string/behavior_subject" />
         <activity
             android:name=".ui.operators.AsyncSubjectExampleActivity"
-            android:label="@string/async_subject"/>
+            android:label="@string/async_subject" />
         <activity
             android:name=".ui.operators.ThrottleLastExampleActivity"
-            android:label="@string/throttle_last"/>
+            android:label="@string/throttle_last" />
         <activity
             android:name=".ui.operators.DebounceExampleActivity"
-            android:label="@string/debounce"/>
-        <activity android:name=".ui.operators.WindowExampleActivity"
-            android:label="@string/window"/>
-        <activity android:name=".ui.operators.ThrottleFirstExampleActivity"
-                  android:label="@string/throttle_first"/>
+            android:label="@string/debounce" />
+        <activity
+            android:name=".ui.operators.WindowExampleActivity"
+            android:label="@string/window" />
+        <activity
+            android:name=".ui.operators.ThrottleFirstExampleActivity"
+            android:label="@string/throttle_first" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/MainActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
similarity index 62%
rename from app/src/main/java/com/rxjava2/android/samples/ui/MainActivity.java
rename to app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
index 00f7352..903fcc3 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/MainActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
@@ -36,128 +36,128 @@
 import com.rxjava2.android.samples.ui.operators.WindowExampleActivity;
 import com.rxjava2.android.samples.ui.operators.ZipExampleActivity;
 
-public class MainActivity extends AppCompatActivity {
+public class OperatorsActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_main);
+        setContentView(R.layout.activity_operators);
     }
 
     public void startSimpleActivity(View view) {
-        startActivity(new Intent(MainActivity.this, SimpleExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, SimpleExampleActivity.class));
     }
 
     public void startMapActivity(View view) {
-        startActivity(new Intent(MainActivity.this, MapExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, MapExampleActivity.class));
     }
 
     public void startZipActivity(View view) {
-        startActivity(new Intent(MainActivity.this, ZipExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, ZipExampleActivity.class));
     }
 
     public void startDisposableActivity(View view) {
-        startActivity(new Intent(MainActivity.this, DisposableExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, DisposableExampleActivity.class));
     }
 
     public void startTakeActivity(View view) {
-        startActivity(new Intent(MainActivity.this, TakeExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, TakeExampleActivity.class));
     }
 
     public void startTimerActivity(View view) {
-        startActivity(new Intent(MainActivity.this, TimerExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, TimerExampleActivity.class));
     }
 
     public void startIntervalActivity(View view) {
-        startActivity(new Intent(MainActivity.this, IntervalExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, IntervalExampleActivity.class));
     }
 
     public void startSingleObserverActivity(View view) {
-        startActivity(new Intent(MainActivity.this, SingleObserverExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, SingleObserverExampleActivity.class));
     }
 
     public void startCompletableObserverActivity(View view) {
-        startActivity(new Intent(MainActivity.this, CompletableObserverExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, CompletableObserverExampleActivity.class));
     }
 
     public void startFlowableActivity(View view) {
-        startActivity(new Intent(MainActivity.this, FlowableExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, FlowableExampleActivity.class));
     }
 
     public void startReduceActivity(View view) {
-        startActivity(new Intent(MainActivity.this, ReduceExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, ReduceExampleActivity.class));
     }
 
     public void startBufferActivity(View view) {
-        startActivity(new Intent(MainActivity.this, BufferExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, BufferExampleActivity.class));
     }
 
     public void startFilterActivity(View view) {
-        startActivity(new Intent(MainActivity.this, FilterExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, FilterExampleActivity.class));
     }
 
     public void startSkipActivity(View view) {
-        startActivity(new Intent(MainActivity.this, SkipExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, SkipExampleActivity.class));
     }
 
     public void startScanActivity(View view) {
-        startActivity(new Intent(MainActivity.this, ScanExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, ScanExampleActivity.class));
     }
 
     public void startReplayActivity(View view) {
-        startActivity(new Intent(MainActivity.this, ReplayExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, ReplayExampleActivity.class));
     }
 
     public void startConcatActivity(View view) {
-        startActivity(new Intent(MainActivity.this, ConcatExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, ConcatExampleActivity.class));
     }
 
     public void startMergeActivity(View view) {
-        startActivity(new Intent(MainActivity.this, MergeExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, MergeExampleActivity.class));
     }
 
     public void startDeferActivity(View view) {
-        startActivity(new Intent(MainActivity.this, DeferExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, DeferExampleActivity.class));
     }
 
     public void startDistinctActivity(View view) {
-        startActivity(new Intent(MainActivity.this, DistinctExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, DistinctExampleActivity.class));
     }
 
     public void startLastOperatorActivity(View view) {
-        startActivity(new Intent(MainActivity.this, LastOperatorExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, LastOperatorExampleActivity.class));
     }
 
     public void startReplaySubjectActivity(View view) {
-        startActivity(new Intent(MainActivity.this, ReplaySubjectExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, ReplaySubjectExampleActivity.class));
     }
 
     public void startPublishSubjectActivity(View view) {
-        startActivity(new Intent(MainActivity.this, PublishSubjectExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, PublishSubjectExampleActivity.class));
     }
 
     public void startBehaviorSubjectActivity(View view) {
-        startActivity(new Intent(MainActivity.this, BehaviorSubjectExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, BehaviorSubjectExampleActivity.class));
     }
 
     public void startAsyncSubjectActivity(View view) {
-        startActivity(new Intent(MainActivity.this, AsyncSubjectExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, AsyncSubjectExampleActivity.class));
     }
 
     public void startThrottleFirstActivity(View view) {
-        startActivity(new Intent(MainActivity.this,ThrottleFirstExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this,ThrottleFirstExampleActivity.class));
     }
 
     public void startThrottleLastActivity(View view) {
-        startActivity(new Intent(MainActivity.this, ThrottleLastExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, ThrottleLastExampleActivity.class));
     }
 
     public void startDebounceActivity(View view) {
-        startActivity(new Intent(MainActivity.this, DebounceExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this, DebounceExampleActivity.class));
     }
 
     public void startWindowActivity(View view) {
-        startActivity(new Intent(MainActivity.this,WindowExampleActivity.class));
+        startActivity(new Intent(OperatorsActivity.this,WindowExampleActivity.class));
     }
 
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
new file mode 100644
index 0000000..58a9514
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
@@ -0,0 +1,27 @@
+package com.rxjava2.android.samples.ui;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.view.View;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.ui.networking.NetworkingActivity;
+
+public class SelectionActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_selection);
+    }
+
+    public void startOperatorsActivity(View view) {
+        startActivity(new Intent(SelectionActivity.this, OperatorsActivity.class));
+    }
+
+    public void startNetworkingActivity(View view) {
+        startActivity(new Intent(SelectionActivity.this, NetworkingActivity.class));
+    }
+
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
new file mode 100644
index 0000000..ef2bd9f
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
@@ -0,0 +1,10 @@
+package com.rxjava2.android.samples.ui.networking;
+
+import android.support.v7.app.AppCompatActivity;
+
+/**
+ * Created by amitshekhar on 04/02/17.
+ */
+
+public class NetworkingActivity extends AppCompatActivity {
+}
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_operators.xml
similarity index 99%
rename from app/src/main/res/layout/activity_main.xml
rename to app/src/main/res/layout/activity_operators.xml
index 7c37398..66deb1d 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_operators.xml
@@ -3,12 +3,12 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:fadeScrollbars="false"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
-    android:fadeScrollbars="false"
-    tools:context="com.rxjava2.android.samples.ui.MainActivity">
+    tools:context="com.rxjava2.android.samples.ui.OperatorsActivity">
 
     <LinearLayout
         android:layout_width="match_parent"
diff --git a/app/src/main/res/layout/activity_selection.xml b/app/src/main/res/layout/activity_selection.xml
new file mode 100644
index 0000000..25f2b1f
--- /dev/null
+++ b/app/src/main/res/layout/activity_selection.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:fadeScrollbars="false"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    tools:context="com.rxjava2.android.samples.ui.SelectionActivity">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startOperatorsActivity"
+            android:text="@string/operators"
+            android:textColor="@android:color/black" />
+
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startNetworkingActivity"
+            android:text="@string/networking"
+            android:textColor="@android:color/black" />
+
+    </LinearLayout>
+</ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index f22fd33..64125a7 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,6 +1,8 @@
 <resources>
     <string name="app_name">RxJava2-Android-Samples</string>
     <string name="doSomeWork">doSomeWork</string>
+    <string name="operators">Operators</string>
+    <string name="networking">Networking</string>
     <string name="simple">Simple</string>
     <string name="map">Map</string>
     <string name="zip">Zip</string>

From 72a2f1ae8b7897cfd7b711715c2ed44e8941a0e5 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 4 Feb 2017 11:47:19 +0530
Subject: [PATCH 053/137] Add fast-android-networking-rxjava2 library and
 internet permission

---
 app/build.gradle                 | 1 +
 app/src/main/AndroidManifest.xml | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/app/build.gradle b/app/build.gradle
index 8e8ceee..f5f3ef9 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -25,4 +25,5 @@ dependencies {
     compile 'com.android.support:appcompat-v7:25.1.0'
     compile 'io.reactivex.rxjava2:rxjava:2.0.5'
     compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
+    compile 'com.amitshekhar.android:rx2-android-networking:0.0.1'
 }
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index eedc8f2..03351b5 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.rxjava2.android.samples">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
         android:name=".MyApplication"
         android:allowBackup="true"

From c8ae50be65e8befb31189162aa6a18a1414198da Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 4 Feb 2017 12:14:26 +0530
Subject: [PATCH 054/137] Add examples for networking

---
 .../android/samples/model/ApiUser.java        |   8 +-
 .../rxjava2/android/samples/model/User.java   |  11 +
 .../android/samples/model/UserDetail.java     |  21 +
 .../ui/networking/NetworkingActivity.java     | 376 ++++++++++++++++++
 .../rxjava2/android/samples/utils/Utils.java  |  39 +-
 .../main/res/layout/activity_networking.xml   |  66 +++
 app/src/main/res/values/strings.xml           |   3 +
 7 files changed, 512 insertions(+), 12 deletions(-)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/model/UserDetail.java
 create mode 100644 app/src/main/res/layout/activity_networking.xml

diff --git a/app/src/main/java/com/rxjava2/android/samples/model/ApiUser.java b/app/src/main/java/com/rxjava2/android/samples/model/ApiUser.java
index 941bfc3..715b150 100644
--- a/app/src/main/java/com/rxjava2/android/samples/model/ApiUser.java
+++ b/app/src/main/java/com/rxjava2/android/samples/model/ApiUser.java
@@ -5,15 +5,15 @@
  */
 public class ApiUser {
     public long id;
-    public String firstName;
-    public String lastName;
+    public String firstname;
+    public String lastname;
 
     @Override
     public String toString() {
         return "ApiUser{" +
                 "id=" + id +
-                ", firstName='" + firstName + '\'' +
-                ", lastName='" + lastName + '\'' +
+                ", firstName='" + firstname + '\'' +
+                ", lastName='" + lastname + '\'' +
                 '}';
     }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/model/User.java b/app/src/main/java/com/rxjava2/android/samples/model/User.java
index 5d64ffb..19f492f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/model/User.java
+++ b/app/src/main/java/com/rxjava2/android/samples/model/User.java
@@ -7,6 +7,16 @@ public class User {
     public long id;
     public String firstName;
     public String lastName;
+    public boolean isFollowing;
+
+    public User() {
+    }
+
+    public User(ApiUser apiUser) {
+        this.id = apiUser.id;
+        this.firstName = apiUser.firstname;
+        this.lastName = apiUser.lastname;
+    }
 
     @Override
     public String toString() {
@@ -14,6 +24,7 @@ public String toString() {
                 "id=" + id +
                 ", firstName='" + firstName + '\'' +
                 ", lastName='" + lastName + '\'' +
+                ", isFollowing=" + isFollowing +
                 '}';
     }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/model/UserDetail.java b/app/src/main/java/com/rxjava2/android/samples/model/UserDetail.java
new file mode 100644
index 0000000..1be734b
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/model/UserDetail.java
@@ -0,0 +1,21 @@
+package com.rxjava2.android.samples.model;
+
+/**
+ * Created by amitshekhar on 04/02/17.
+ */
+
+public class UserDetail {
+
+    public long id;
+    public String firstname;
+    public String lastname;
+
+    @Override
+    public String toString() {
+        return "UserDetail{" +
+                "id=" + id +
+                ", firstname='" + firstname + '\'' +
+                ", lastname='" + lastname + '\'' +
+                '}';
+    }
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
index ef2bd9f..d883d86 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
@@ -1,10 +1,386 @@
 package com.rxjava2.android.samples.ui.networking;
 
+import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.util.Pair;
+import android.view.View;
+
+import com.rx2androidnetworking.Rx2AndroidNetworking;
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.model.ApiUser;
+import com.rxjava2.android.samples.model.User;
+import com.rxjava2.android.samples.model.UserDetail;
+import com.rxjava2.android.samples.utils.Utils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableSource;
+import io.reactivex.Observer;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.functions.BiFunction;
+import io.reactivex.functions.Function;
+import io.reactivex.functions.Predicate;
+import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 04/02/17.
  */
 
 public class NetworkingActivity extends AppCompatActivity {
+
+    public static final String TAG = NetworkingActivity.class.getSimpleName();
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_networking);
+    }
+
+    /************************************
+     * map operator start
+     ************************************/
+
+    public void map(View view) {
+        Rx2AndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAnUser/{userId}")
+                .addPathParameter("userId", "1")
+                .build()
+                .getObjectObservable(ApiUser.class)
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .map(new Function<ApiUser, User>() {
+                    @Override
+                    public User apply(ApiUser apiUser) throws Exception {
+                        // here we get ApiUser from server
+                        User user = new User(apiUser);
+                        // then by converting, we are returning user
+                        return user;
+                    }
+                })
+                .subscribe(new Observer<User>() {
+                    @Override
+                    public void onSubscribe(Disposable d) {
+
+                    }
+
+                    @Override
+                    public void onNext(User user) {
+                        Log.d(TAG, "user : " + user.toString());
+                    }
+
+                    @Override
+                    public void onError(Throwable e) {
+                        Utils.logError(TAG, e);
+                    }
+
+                    @Override
+                    public void onComplete() {
+                        Log.d(TAG, "onComplete");
+                    }
+                });
+    }
+
+
+    /************************************
+     * zip operator start
+     *********************************/
+
+    /*
+    * This observable return the list of User who loves cricket
+    */
+    private Observable<List<User>> getCricketFansObservable() {
+        return Rx2AndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllCricketFans")
+                .build()
+                .getObjectListObservable(User.class);
+    }
+
+    /*
+    * This observable return the list of User who loves Football
+    */
+    private Observable<List<User>> getFootballFansObservable() {
+        return Rx2AndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllFootballFans")
+                .build()
+                .getObjectListObservable(User.class);
+    }
+
+    /*
+    * This do the complete magic, make both network call
+    * and then returns the list of user who loves both
+    * Using zip operator to get both response at a time
+    */
+    private void findUsersWhoLovesBoth() {
+        // here we are using zip operator to combine both request
+        Observable.zip(getCricketFansObservable(), getFootballFansObservable(),
+                new BiFunction<List<User>, List<User>, List<User>>() {
+                    @Override
+                    public List<User> apply(List<User> cricketFans, List<User> footballFans) throws Exception {
+                        List<User> userWhoLovesBoth =
+                                filterUserWhoLovesBoth(cricketFans, footballFans);
+                        return userWhoLovesBoth;
+                    }
+                })
+                .subscribeOn(Schedulers.newThread())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(new Observer<List<User>>() {
+                    @Override
+                    public void onSubscribe(Disposable d) {
+
+                    }
+
+                    @Override
+                    public void onNext(List<User> users) {
+                        // do anything with user who loves both
+                        Log.d(TAG, "userList size : " + users.size());
+                        for (User user : users) {
+                            Log.d(TAG, "user : " + user.toString());
+                        }
+                    }
+
+                    @Override
+                    public void onError(Throwable e) {
+                        Utils.logError(TAG, e);
+                    }
+
+                    @Override
+                    public void onComplete() {
+                        Log.d(TAG, "onComplete");
+                    }
+                });
+    }
+
+    private List<User> filterUserWhoLovesBoth(List<User> cricketFans, List<User> footballFans) {
+        List<User> userWhoLovesBoth = new ArrayList<>();
+        for (User cricketFan : cricketFans) {
+            for (User footballFan : footballFans) {
+                if (cricketFan.id == footballFan.id) {
+                    userWhoLovesBoth.add(cricketFan);
+                }
+            }
+        }
+        return userWhoLovesBoth;
+    }
+
+
+    public void zip(View view) {
+        findUsersWhoLovesBoth();
+    }
+
+    /************************************
+     * flatMap and filter operator start
+     ************************************/
+
+    private Observable<List<User>> getAllMyFriendsObservable() {
+        return Rx2AndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllFriends/{userId}")
+                .addPathParameter("userId", "1")
+                .build()
+                .getObjectListObservable(User.class);
+    }
+
+    public void flatMapAndFilter(View view) {
+        getAllMyFriendsObservable()
+                .flatMap(new Function<List<User>, ObservableSource<User>>() { // flatMap - to return users one by one
+                    @Override
+                    public ObservableSource<User> apply(List<User> usersList) throws Exception {
+                        return Observable.fromIterable(usersList); // returning user one by one from usersList.
+                    }
+                })
+                .filter(new Predicate<User>() {
+                    @Override
+                    public boolean test(User user) throws Exception {
+                        // filtering user who follows me.
+                        return user.isFollowing;
+                    }
+                })
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(new Observer<User>() {
+                    @Override
+                    public void onSubscribe(Disposable d) {
+
+                    }
+
+                    @Override
+                    public void onNext(User user) {
+                        // only the user who is following me comes here one by one
+                        Log.d(TAG, "user : " + user.toString());
+                    }
+
+                    @Override
+                    public void onError(Throwable e) {
+                        Utils.logError(TAG, e);
+                    }
+
+                    @Override
+                    public void onComplete() {
+                        Log.d(TAG, "onComplete");
+                    }
+                });
+    }
+
+    /************************************
+     * take operator start
+     ************************************/
+
+    public void take(View view) {
+        getUserListObservable()
+                .flatMap(new Function<List<User>, ObservableSource<User>>() { // flatMap - to return users one by one
+                    @Override
+                    public ObservableSource<User> apply(List<User> usersList) throws Exception {
+                        return Observable.fromIterable(usersList); // returning user one by one from usersList.
+                    }
+                })
+                .take(4) // it will only emit first 4 users out of all
+                .subscribeOn(Schedulers.newThread())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(new Observer<User>() {
+                    @Override
+                    public void onSubscribe(Disposable d) {
+
+                    }
+
+                    @Override
+                    public void onNext(User user) {
+                        // // only four user comes here one by one
+                        Log.d(TAG, "user : " + user.toString());
+                    }
+
+                    @Override
+                    public void onError(Throwable e) {
+                        Utils.logError(TAG, e);
+                    }
+
+                    @Override
+                    public void onComplete() {
+                        Log.d(TAG, "onComplete");
+                    }
+                });
+    }
+
+
+    /************************************
+     * flatMap operator start
+     ************************************/
+
+
+    public void flatMap(View view) {
+        getUserListObservable()
+                .flatMap(new Function<List<User>, ObservableSource<User>>() { // flatMap - to return users one by one
+                    @Override
+                    public ObservableSource<User> apply(List<User> usersList) throws Exception {
+                        return Observable.fromIterable(usersList); // returning user one by one from usersList.
+                    }
+                })
+                .flatMap(new Function<User, ObservableSource<UserDetail>>() {
+                    @Override
+                    public ObservableSource<UserDetail> apply(User user) throws Exception {
+                        // here we get the user one by one
+                        // and returns corresponding getUserDetailObservable
+                        // for that userId
+                        return getUserDetailObservable(user.id);
+                    }
+                })
+                .subscribeOn(Schedulers.newThread())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(new Observer<UserDetail>() {
+                    @Override
+                    public void onSubscribe(Disposable d) {
+
+                    }
+
+                    @Override
+                    public void onError(Throwable e) {
+                        Utils.logError(TAG, e);
+                    }
+
+                    @Override
+                    public void onNext(UserDetail userDetail) {
+                        // do anything with userDetail
+                        Log.d(TAG, "userDetail : " + userDetail.toString());
+                    }
+
+                    @Override
+                    public void onComplete() {
+                        Log.d(TAG, "onComplete");
+                    }
+                });
+    }
+
+    /************************************
+     * flatMapWithZip operator start
+     ************************************/
+
+    private Observable<List<User>> getUserListObservable() {
+        return Rx2AndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllUsers/{pageNumber}")
+                .addPathParameter("pageNumber", "0")
+                .addQueryParameter("limit", "10")
+                .build()
+                .getObjectListObservable(User.class);
+    }
+
+    private Observable<UserDetail> getUserDetailObservable(long id) {
+        return Rx2AndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAnUserDetail/{userId}")
+                .addPathParameter("userId", String.valueOf(id))
+                .build()
+                .getObjectObservable(UserDetail.class);
+    }
+
+    public void flatMapWithZip(View view) {
+        getUserListObservable()
+                .flatMap(new Function<List<User>, ObservableSource<User>>() { // flatMap - to return users one by one
+                    @Override
+                    public ObservableSource<User> apply(List<User> usersList) throws Exception {
+                        return Observable.fromIterable(usersList); // returning user one by one from usersList.
+                    }
+                })
+                .flatMap(new Function<User, ObservableSource<Pair<UserDetail, User>>>() {
+                    @Override
+                    public ObservableSource<Pair<UserDetail, User>> apply(User user) throws Exception {
+                        // here we get the user one by one and then we are zipping
+                        // two observable - one getUserDetailObservable (network call to get userDetail)
+                        // and another Observable.just(user) - just to emit user
+                        return Observable.zip(getUserDetailObservable(user.id),
+                                Observable.just(user),
+                                new BiFunction<UserDetail, User, Pair<UserDetail, User>>() {
+                                    @Override
+                                    public Pair<UserDetail, User> apply(UserDetail userDetail, User user) throws Exception {
+                                        // runs when network call completes
+                                        // we get here userDetail for the corresponding user
+                                        return new Pair<>(userDetail, user); // returning the pair(userDetail, user)
+                                    }
+                                });
+                    }
+                })
+                .subscribeOn(Schedulers.newThread())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(new Observer<Pair<UserDetail, User>>() {
+                    @Override
+                    public void onComplete() {
+                        // do something onCompleted
+                        Log.d(TAG, "onComplete");
+                    }
+
+                    @Override
+                    public void onError(Throwable e) {
+                        // handle error
+                        Utils.logError(TAG, e);
+                    }
+
+                    @Override
+                    public void onSubscribe(Disposable d) {
+
+                    }
+
+                    @Override
+                    public void onNext(Pair<UserDetail, User> pair) {
+                        // here we are getting the userDetail for the corresponding user one by one
+                        UserDetail userDetail = pair.first;
+                        User user = pair.second;
+                        Log.d(TAG, "user : " + user.toString());
+                        Log.d(TAG, "userDetail : " + userDetail.toString());
+                    }
+                });
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java b/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
index ecd5a4d..aa13677 100644
--- a/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
+++ b/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
@@ -1,5 +1,8 @@
 package com.rxjava2.android.samples.utils;
 
+import android.util.Log;
+
+import com.androidnetworking.error.ANError;
 import com.rxjava2.android.samples.model.ApiUser;
 import com.rxjava2.android.samples.model.User;
 
@@ -42,18 +45,18 @@ public static List<ApiUser> getApiUserList() {
         List<ApiUser> apiUserList = new ArrayList<>();
 
         ApiUser apiUserOne = new ApiUser();
-        apiUserOne.firstName = "Amit";
-        apiUserOne.lastName = "Shekhar";
+        apiUserOne.firstname = "Amit";
+        apiUserOne.lastname = "Shekhar";
         apiUserList.add(apiUserOne);
 
         ApiUser apiUserTwo = new ApiUser();
-        apiUserTwo.firstName = "Manish";
-        apiUserTwo.lastName = "Kumar";
+        apiUserTwo.firstname = "Manish";
+        apiUserTwo.lastname = "Kumar";
         apiUserList.add(apiUserTwo);
 
         ApiUser apiUserThree = new ApiUser();
-        apiUserThree.firstName = "Sumit";
-        apiUserThree.lastName = "Kumar";
+        apiUserThree.firstname = "Sumit";
+        apiUserThree.lastname = "Kumar";
         apiUserList.add(apiUserThree);
 
         return apiUserList;
@@ -65,8 +68,8 @@ public static List<User> convertApiUserListToUserList(List<ApiUser> apiUserList)
 
         for (ApiUser apiUser : apiUserList) {
             User user = new User();
-            user.firstName = apiUser.firstName;
-            user.lastName = apiUser.lastName;
+            user.firstName = apiUser.firstname;
+            user.lastName = apiUser.lastname;
             userList.add(user);
         }
 
@@ -125,4 +128,24 @@ public static List<User> filterUserWhoLovesBoth(List<User> cricketFans, List<Use
         return userWhoLovesBoth;
     }
 
+    public static void logError(String TAG, Throwable e) {
+        if (e instanceof ANError) {
+            ANError anError = (ANError) e;
+            if (anError.getErrorCode() != 0) {
+                // received ANError from server
+                // error.getErrorCode() - the ANError code from server
+                // error.getErrorBody() - the ANError body from server
+                // error.getErrorDetail() - just a ANError detail
+                Log.d(TAG, "onError errorCode : " + anError.getErrorCode());
+                Log.d(TAG, "onError errorBody : " + anError.getErrorBody());
+                Log.d(TAG, "onError errorDetail : " + anError.getErrorDetail());
+            } else {
+                // error.getErrorDetail() : connectionError, parseError, requestCancelledError
+                Log.d(TAG, "onError errorDetail : " + anError.getErrorDetail());
+            }
+        } else {
+            Log.d(TAG, "onError errorMessage : " + e.getMessage());
+        }
+    }
+
 }
diff --git a/app/src/main/res/layout/activity_networking.xml b/app/src/main/res/layout/activity_networking.xml
new file mode 100644
index 0000000..12893a1
--- /dev/null
+++ b/app/src/main/res/layout/activity_networking.xml
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="com.rxjava2.android.samples.ui.networking.NetworkingActivity">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:paddingBottom="@dimen/activity_vertical_margin"
+        android:paddingLeft="@dimen/activity_horizontal_margin"
+        android:paddingRight="@dimen/activity_horizontal_margin"
+        android:paddingTop="@dimen/activity_vertical_margin">
+
+        <Button
+            android:id="@+id/map"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_margin="8dp"
+            android:onClick="map"
+            android:text="@string/map" />
+
+        <Button
+            android:id="@+id/zip"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_margin="8dp"
+            android:onClick="zip"
+            android:text="@string/zip" />
+
+        <Button
+            android:id="@+id/flatMapAndFilter"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_margin="8dp"
+            android:onClick="flatMapAndFilter"
+            android:text="@string/flatMapAndFilter" />
+
+        <Button
+            android:id="@+id/take"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_margin="8dp"
+            android:onClick="take"
+            android:text="@string/take" />
+
+        <Button
+            android:id="@+id/flatMap"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_margin="8dp"
+            android:onClick="flatMap"
+            android:text="@string/flatMap" />
+
+        <Button
+            android:id="@+id/flatMapWithZip"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:layout_margin="8dp"
+            android:onClick="flatMapWithZip"
+            android:text="@string/flatMapWithZip" />
+
+    </LinearLayout>
+</ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 64125a7..c7a043c 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -32,4 +32,7 @@
     <string name="debounce">Debounce</string>
     <string name="window">Window</string>
     <string name="throttle_first">ThrottleFirst</string>
+    <string name="flatMapAndFilter">flatMapAndFilter</string>
+    <string name="flatMap">flatMap</string>
+    <string name="flatMapWithZip">flatMapWithZip</string>
 </resources>

From 3692dfa0afa47dbdce28ea17eb89cea68424cfc6 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 6 Feb 2017 11:39:12 +0530
Subject: [PATCH 055/137] Add RxBusExample

---
 app/src/main/AndroidManifest.xml              |  3 +
 .../android/samples/MyApplication.java        | 24 +++++++
 .../rxjava2/android/samples/model/Events.java | 21 ++++++
 .../android/samples/ui/SelectionActivity.java |  6 ++
 .../android/samples/ui/rxbus/RxBus.java       | 28 ++++++++
 .../samples/ui/rxbus/RxBusActivity.java       | 70 +++++++++++++++++++
 app/src/main/res/layout/activity_rxbus.xml    | 25 +++++++
 .../main/res/layout/activity_selection.xml    |  7 ++
 app/src/main/res/values/strings.xml           |  2 +
 9 files changed, 186 insertions(+)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/model/Events.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBus.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java
 create mode 100644 app/src/main/res/layout/activity_rxbus.xml

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 03351b5..9ed2ef7 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -24,6 +24,9 @@
         <activity
             android:name=".ui.networking.NetworkingActivity"
             android:label="@string/networking" />
+        <activity
+            android:name=".ui.rxbus.RxBusActivity"
+            android:label="@string/rx_bus" />
         <activity
             android:name=".ui.operators.SimpleExampleActivity"
             android:label="@string/simple" />
diff --git a/app/src/main/java/com/rxjava2/android/samples/MyApplication.java b/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
index be870d6..d4df621 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
@@ -2,6 +2,14 @@
 
 import android.app.Application;
 
+import com.rxjava2.android.samples.model.Events;
+import com.rxjava2.android.samples.ui.rxbus.RxBus;
+
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.functions.Consumer;
+
 /**
  * Created by threshold on 2017/1/12.
  */
@@ -9,10 +17,26 @@
 public class MyApplication extends Application {
 
     public static final String TAG = "MyApplication";
+    private RxBus bus;
 
     @Override
     public void onCreate() {
         super.onCreate();
+        bus = new RxBus();
+    }
+
+    public RxBus bus() {
+        return bus;
+    }
+
+    public void sendAutoEvent() {
+        Observable.timer(2, TimeUnit.SECONDS)
+                .subscribe(new Consumer<Long>() {
+                    @Override
+                    public void accept(Long aLong) throws Exception {
+                        bus.send(new Events.AutoEvent());
+                    }
+                });
     }
 
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/model/Events.java b/app/src/main/java/com/rxjava2/android/samples/model/Events.java
new file mode 100644
index 0000000..d4541b4
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/model/Events.java
@@ -0,0 +1,21 @@
+package com.rxjava2.android.samples.model;
+
+/**
+ * Created by amitshekhar on 06/02/17.
+ */
+
+public class Events {
+
+    private Events() {
+
+    }
+
+    public static class TapEvent {
+
+    }
+
+    public static class AutoEvent {
+
+    }
+
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
index 58a9514..6395097 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
@@ -5,8 +5,10 @@
 import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 
+import com.rxjava2.android.samples.MyApplication;
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.ui.networking.NetworkingActivity;
+import com.rxjava2.android.samples.ui.rxbus.RxBusActivity;
 
 public class SelectionActivity extends AppCompatActivity {
 
@@ -24,4 +26,8 @@ public void startNetworkingActivity(View view) {
         startActivity(new Intent(SelectionActivity.this, NetworkingActivity.class));
     }
 
+    public void startRxBusActivity(View view) {
+        ((MyApplication) getApplication()).sendAutoEvent();
+        startActivity(new Intent(SelectionActivity.this, RxBusActivity.class));
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBus.java b/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBus.java
new file mode 100644
index 0000000..88b7a9a
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBus.java
@@ -0,0 +1,28 @@
+package com.rxjava2.android.samples.ui.rxbus;
+
+import io.reactivex.Observable;
+import io.reactivex.subjects.PublishSubject;
+
+/**
+ * Created by amitshekhar on 06/02/17.
+ */
+
+public class RxBus {
+
+    public RxBus() {
+    }
+
+    private PublishSubject<Object> bus = PublishSubject.create();
+
+    public void send(Object o) {
+        bus.onNext(o);
+    }
+
+    public Observable<Object> toObserverable() {
+        return bus;
+    }
+
+    public boolean hasObservers() {
+        return bus.hasObservers();
+    }
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java
new file mode 100644
index 0000000..5caba89
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java
@@ -0,0 +1,70 @@
+package com.rxjava2.android.samples.ui.rxbus;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.MyApplication;
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.model.Events;
+
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.functions.Consumer;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 06/02/17.
+ */
+
+public class RxBusActivity extends AppCompatActivity {
+
+    public static final String TAG = RxBusActivity.class.getSimpleName();
+    TextView textView;
+    Button button;
+    private final CompositeDisposable disposables = new CompositeDisposable();
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        disposables.clear(); // do not send event after activity has been destroyed
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_rxbus);
+        textView = (TextView) findViewById(R.id.textView);
+        button = (Button) findViewById(R.id.button);
+
+        disposables.add(((MyApplication) getApplication())
+                .bus()
+                .toObserverable()
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(new Consumer<Object>() {
+                    @Override
+                    public void accept(Object object) throws Exception {
+                        if (object instanceof Events.AutoEvent) {
+                            textView.setText("Auto Event Received");
+                        } else if (object instanceof Events.TapEvent) {
+                            textView.setText("Tap Event Received");
+                        }
+                    }
+                }));
+
+        button.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ((MyApplication) getApplication())
+                        .bus()
+                        .send(new Events.TapEvent());
+            }
+        });
+    }
+
+
+
+}
diff --git a/app/src/main/res/layout/activity_rxbus.xml b/app/src/main/res/layout/activity_rxbus.xml
new file mode 100644
index 0000000..8e2d931
--- /dev/null
+++ b/app/src/main/res/layout/activity_rxbus.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="com.rxjava2.android.samples.ui.rxbus.RxBusActivity">
+
+    <TextView
+        android:id="@+id/textView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="top|center"
+        android:layout_marginTop="12dp"
+        android:text="Hello World!"
+        android:textColor="@android:color/black" />
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:text="@string/click_me"
+        android:textColor="@android:color/black" />
+
+</FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_selection.xml b/app/src/main/res/layout/activity_selection.xml
index 25f2b1f..3a0f1a7 100644
--- a/app/src/main/res/layout/activity_selection.xml
+++ b/app/src/main/res/layout/activity_selection.xml
@@ -29,5 +29,12 @@
             android:text="@string/networking"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startRxBusActivity"
+            android:text="@string/rx_bus"
+            android:textColor="@android:color/black" />
+
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index c7a043c..df6758e 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -35,4 +35,6 @@
     <string name="flatMapAndFilter">flatMapAndFilter</string>
     <string name="flatMap">flatMap</string>
     <string name="flatMapWithZip">flatMapWithZip</string>
+    <string name="click_me">Click Me</string>
+    <string name="rx_bus">RxBus</string>
 </resources>

From 5c3d17dcd654735f4c32175a4765e55cfc356477 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 6 Feb 2017 11:41:52 +0530
Subject: [PATCH 056/137] Add RxBusExample in ReadMe

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 9032b32..e2e19c7 100644
--- a/README.md
+++ b/README.md
@@ -91,6 +91,7 @@ RxJava1 -> RxJava2
 * [MergeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java) - Using `merge` Operator
 * [DeferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java) - Using `defer` Observable
 * [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java) - Using `Interval`
+* [RxBusActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java) - RxBus, RxJava2Bus, EventBus, RxEventBus
 
 ### TODO 
 

From 6b1626b42b892e81a5cb5f26d54e45c890a32e72 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Thu, 9 Feb 2017 01:03:01 +0530
Subject: [PATCH 057/137] Add Image For Readme

---
 README.md          |   3 +++
 assets/rxjava2.png | Bin 0 -> 69455 bytes
 2 files changed, 3 insertions(+)
 create mode 100644 assets/rxjava2.png

diff --git a/README.md b/README.md
index e2e19c7..02596d7 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,7 @@
 # Learning RxJava 2 for Android by example
+
+<img src=https://raw.githubusercontent.com/amitshekhariitbhu/RxJava2-Android-Samples/master/assets/rxjava2.png >
+
 ## How to use RxJava 2 in Android Application
 ## How to migrate from RxJava 1 to RxJava 2
 
diff --git a/assets/rxjava2.png b/assets/rxjava2.png
new file mode 100644
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G_kRK3#&v4|

literal 0
HcmV?d00001


From f2a80486f69c7006922fcb5f9604e89df3e1e054 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Thu, 9 Feb 2017 17:46:45 +0530
Subject: [PATCH 058/137] Update Readme

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 02596d7..473ad79 100644
--- a/README.md
+++ b/README.md
@@ -109,6 +109,8 @@ RxJava1 -> RxJava2
 ### Check out an awesome library for fast and simple networking in Android.
 * [Fast Android Networking Library](https://github.com/amitshekhariitbhu/Fast-Android-Networking)
 
+###[Check out Mindorks awesome open source projects here](https://mindorks.com/open-source-projects)
+
 ### Contact - Let's become friend
 - [Twitter](https://twitter.com/amitiitbhu)
 - [Github](https://github.com/amitshekhariitbhu)

From b3ddc869b382bd5faf4f0ebc0861648d18e9b2b7 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 14 Feb 2017 13:05:32 +0530
Subject: [PATCH 059/137] More clarification on behavior subject

---
 .../samples/ui/operators/BehaviorSubjectExampleActivity.java    | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
index 3e2d9cd..e398fd8 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
@@ -42,6 +42,8 @@ public void onClick(View view) {
     /* When an observer subscribes to a BehaviorSubject, it begins by emitting the item most
      * recently emitted by the source Observable (or a seed/default value if none has yet been
      * emitted) and then continues to emit any other items emitted later by the source Observable(s).
+     * It is different from Async Subject as async emits the last value (and only the last value)
+     * but the Behavior Subject emits the last and the subsequent values also.
      */
     private void doSomeWork() {
 

From 522728ea45098a2d0d73fd182279a791bbde6b20 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 18 Feb 2017 15:00:16 +0530
Subject: [PATCH 060/137] Add open-source badge

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 473ad79..3f715c9 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # Learning RxJava 2 for Android by example
 
+[![Mindorks](https://img.shields.io/badge/mindorks-opensource-blue.svg)](https://mindorks.com/open-source-projects)
+
 <img src=https://raw.githubusercontent.com/amitshekhariitbhu/RxJava2-Android-Samples/master/assets/rxjava2.png >
 
 ## How to use RxJava 2 in Android Application

From 5ebdcbcba1e28301261f491fd5c82dc70d15c744 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Wed, 22 Feb 2017 22:08:23 +0530
Subject: [PATCH 061/137] Add link

---
 README.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/README.md b/README.md
index 3f715c9..6e8f580 100644
--- a/README.md
+++ b/README.md
@@ -111,6 +111,9 @@ RxJava1 -> RxJava2
 ### Check out an awesome library for fast and simple networking in Android.
 * [Fast Android Networking Library](https://github.com/amitshekhariitbhu/Fast-Android-Networking)
 
+### Another awesome library for debugging databases and shared preferences.
+* [Android Debug Database](https://github.com/amitshekhariitbhu/Android-Debug-Database)
+
 ###[Check out Mindorks awesome open source projects here](https://mindorks.com/open-source-projects)
 
 ### Contact - Let's become friend

From 5869e880382c45ffc25f5ce57c3be84175f899e4 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 24 Feb 2017 17:36:44 +0530
Subject: [PATCH 062/137] correct format

---
 README.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 6e8f580..7ea9dbb 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,9 @@
+<img src=https://raw.githubusercontent.com/amitshekhariitbhu/RxJava2-Android-Samples/master/assets/rxjava2.png >
+
 # Learning RxJava 2 for Android by example
 
 [![Mindorks](https://img.shields.io/badge/mindorks-opensource-blue.svg)](https://mindorks.com/open-source-projects)
-
-<img src=https://raw.githubusercontent.com/amitshekhariitbhu/RxJava2-Android-Samples/master/assets/rxjava2.png >
+[![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-RxJava2%20Android%20Samples-blue.svg?style=flat)](https://android-arsenal.com/details/3/4314)
 
 ## How to use RxJava 2 in Android Application
 ## How to migrate from RxJava 1 to RxJava 2

From 48840f451090cc4b4f51521cd60beaffdeef4889 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 25 Feb 2017 08:54:49 +0530
Subject: [PATCH 063/137] Add open-source and license

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 7ea9dbb..4c1af9a 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@
 
 [![Mindorks](https://img.shields.io/badge/mindorks-opensource-blue.svg)](https://mindorks.com/open-source-projects)
 [![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-RxJava2%20Android%20Samples-blue.svg?style=flat)](https://android-arsenal.com/details/3/4314)
+[![Open Source Love](https://badges.frapsoft.com/os/v1/open-source.svg?v=102)](https://opensource.org/licenses/Apache-2.0)
+[![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/LICENSE)
 
 ## How to use RxJava 2 in Android Application
 ## How to migrate from RxJava 1 to RxJava 2

From 4de25ce82deb92c1e48f50a826ae3e63339263ec Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 4 Mar 2017 09:44:28 +0530
Subject: [PATCH 064/137] Update RxJava2 version to 2.0.6

---
 README.md        | 2 +-
 app/build.gradle | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 4c1af9a..de475a8 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ Users switching from 1.x to 2.x have to re-organize their imports, but carefully
 
 Add this in your build.gradle
 ```groovy
-compile 'io.reactivex.rxjava2:rxjava:2.0.5'
+compile 'io.reactivex.rxjava2:rxjava:2.0.6'
 ```
 If you are using RxAndroid also, then add the following
 ```groovy
diff --git a/app/build.gradle b/app/build.gradle
index f5f3ef9..c12509c 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,7 +23,7 @@ dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:25.1.0'
-    compile 'io.reactivex.rxjava2:rxjava:2.0.5'
+    compile 'io.reactivex.rxjava2:rxjava:2.0.6'
     compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
     compile 'com.amitshekhar.android:rx2-android-networking:0.0.1'
 }

From c22c1d7d79b7156c2e4c4fddf6f77cd80f9222e7 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sun, 5 Mar 2017 09:39:49 +0530
Subject: [PATCH 065/137] Add delay operator example

---
 app/src/main/AndroidManifest.xml              |  3 +
 .../android/samples/ui/OperatorsActivity.java |  4 +
 .../ui/operators/DelayExampleActivity.java    | 94 +++++++++++++++++++
 .../main/res/layout/activity_operators.xml    |  7 ++
 app/src/main/res/values/strings.xml           |  1 +
 5 files changed, 109 insertions(+)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 9ed2ef7..2e6e713 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -114,6 +114,9 @@
         <activity
             android:name=".ui.operators.ThrottleFirstExampleActivity"
             android:label="@string/throttle_first" />
+        <activity
+            android:name=".ui.operators.DelayExampleActivity"
+            android:label="@string/delay" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
index 903fcc3..63df8a2 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
@@ -13,6 +13,7 @@
 import com.rxjava2.android.samples.ui.operators.ConcatExampleActivity;
 import com.rxjava2.android.samples.ui.operators.DebounceExampleActivity;
 import com.rxjava2.android.samples.ui.operators.DeferExampleActivity;
+import com.rxjava2.android.samples.ui.operators.DelayExampleActivity;
 import com.rxjava2.android.samples.ui.operators.DisposableExampleActivity;
 import com.rxjava2.android.samples.ui.operators.DistinctExampleActivity;
 import com.rxjava2.android.samples.ui.operators.FilterExampleActivity;
@@ -160,5 +161,8 @@ public void startWindowActivity(View view) {
         startActivity(new Intent(OperatorsActivity.this,WindowExampleActivity.class));
     }
 
+    public void startDelayActivity(View view) {
+        startActivity(new Intent(OperatorsActivity.this,DelayExampleActivity.class));
+    }
 
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java
new file mode 100644
index 0000000..1633c98
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java
@@ -0,0 +1,94 @@
+package com.rxjava2.android.samples.ui.operators;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 05/03/17.
+ */
+
+public class DelayExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = DelayExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /*
+     * simple example using delay to emit after 2 second
+     */
+    private void doSomeWork() {
+        getObservable().delay(2, TimeUnit.SECONDS)
+                // Run on a background thread
+                .subscribeOn(Schedulers.io())
+                // Be notified on the main thread
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getObserver());
+    }
+
+    private Observable<? extends Long> getObservable() {
+        return Observable.timer(2, TimeUnit.SECONDS);
+    }
+
+    private Observer<Long> getObserver() {
+        return new Observer<Long>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Long value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext : value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_operators.xml b/app/src/main/res/layout/activity_operators.xml
index 66deb1d..1c453de 100644
--- a/app/src/main/res/layout/activity_operators.xml
+++ b/app/src/main/res/layout/activity_operators.xml
@@ -218,5 +218,12 @@
             android:text="@string/window"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startDelayActivity"
+            android:text="@string/delay"
+            android:textColor="@android:color/black" />
+
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index df6758e..bef97e6 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -31,6 +31,7 @@
     <string name="throttle_last">ThrottleLast</string>
     <string name="debounce">Debounce</string>
     <string name="window">Window</string>
+    <string name="delay">delay</string>
     <string name="throttle_first">ThrottleFirst</string>
     <string name="flatMapAndFilter">flatMapAndFilter</string>
     <string name="flatMap">flatMap</string>

From 11914145e33adfbb58f0e235f8d323b2383f6071 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 14 Mar 2017 17:06:47 +0530
Subject: [PATCH 066/137] Description for operators

---
 .../ui/networking/NetworkingActivity.java     | 46 +++++++++----------
 1 file changed, 23 insertions(+), 23 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
index d883d86..f651870 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
@@ -40,10 +40,9 @@ protected void onCreate(Bundle savedInstanceState) {
         setContentView(R.layout.activity_networking);
     }
 
-    /************************************
-     * map operator start
-     ************************************/
-
+    /**
+     * Map Operator Example
+     */
     public void map(View view) {
         Rx2AndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAnUser/{userId}")
                 .addPathParameter("userId", "1")
@@ -84,13 +83,13 @@ public void onComplete() {
     }
 
 
-    /************************************
-     * zip operator start
-     *********************************/
+    /**
+     * zip Operator Example
+     */
 
-    /*
-    * This observable return the list of User who loves cricket
-    */
+    /**
+     * This observable return the list of User who loves cricket
+     */
     private Observable<List<User>> getCricketFansObservable() {
         return Rx2AndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllCricketFans")
                 .build()
@@ -168,9 +167,10 @@ public void zip(View view) {
         findUsersWhoLovesBoth();
     }
 
-    /************************************
-     * flatMap and filter operator start
-     ************************************/
+
+    /**
+     * flatMap and filter Operators Example
+     */
 
     private Observable<List<User>> getAllMyFriendsObservable() {
         return Rx2AndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllFriends/{userId}")
@@ -220,9 +220,10 @@ public void onComplete() {
                 });
     }
 
-    /************************************
-     * take operator start
-     ************************************/
+
+    /**
+     * take Operator Example
+     */
 
     public void take(View view) {
         getUserListObservable()
@@ -260,10 +261,9 @@ public void onComplete() {
     }
 
 
-    /************************************
-     * flatMap operator start
-     ************************************/
-
+    /**
+     * flatMap Operator Example
+     */
 
     public void flatMap(View view) {
         getUserListObservable()
@@ -308,9 +308,9 @@ public void onComplete() {
                 });
     }
 
-    /************************************
-     * flatMapWithZip operator start
-     ************************************/
+    /**
+     * flatMapWithZip Operator Example
+     */
 
     private Observable<List<User>> getUserListObservable() {
         return Rx2AndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllUsers/{pageNumber}")

From 1d44f0b618abc43a2b33b5af7725a2dea5c7d5d5 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Wed, 15 Mar 2017 22:33:48 +0530
Subject: [PATCH 067/137] Add Paginator Example

---
 app/build.gradle                              |   1 +
 app/src/main/AndroidManifest.xml              |   3 +
 .../android/samples/ui/SelectionActivity.java |   5 +
 .../ui/pagination/PaginationActivity.java     | 145 ++++++++++++++++++
 .../ui/pagination/PaginationAdapter.java      |  59 +++++++
 .../main/res/layout/activity_pagination.xml   |  22 +++
 .../main/res/layout/activity_selection.xml    |   7 +
 app/src/main/res/layout/item_pagination.xml   |   8 +
 app/src/main/res/values/strings.xml           |   1 +
 9 files changed, 251 insertions(+)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationAdapter.java
 create mode 100644 app/src/main/res/layout/activity_pagination.xml
 create mode 100644 app/src/main/res/layout/item_pagination.xml

diff --git a/app/build.gradle b/app/build.gradle
index c12509c..525d899 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,6 +23,7 @@ dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:25.1.0'
+    compile 'com.android.support:recyclerview-v7:25.1.0'
     compile 'io.reactivex.rxjava2:rxjava:2.0.6'
     compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
     compile 'com.amitshekhar.android:rx2-android-networking:0.0.1'
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 2e6e713..a6a3957 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -27,6 +27,9 @@
         <activity
             android:name=".ui.rxbus.RxBusActivity"
             android:label="@string/rx_bus" />
+        <activity
+            android:name=".ui.pagination.PaginationActivity"
+            android:label="@string/pagination" />
         <activity
             android:name=".ui.operators.SimpleExampleActivity"
             android:label="@string/simple" />
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
index 6395097..87ede3c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
@@ -8,6 +8,7 @@
 import com.rxjava2.android.samples.MyApplication;
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.ui.networking.NetworkingActivity;
+import com.rxjava2.android.samples.ui.pagination.PaginationActivity;
 import com.rxjava2.android.samples.ui.rxbus.RxBusActivity;
 
 public class SelectionActivity extends AppCompatActivity {
@@ -30,4 +31,8 @@ public void startRxBusActivity(View view) {
         ((MyApplication) getApplication()).sendAutoEvent();
         startActivity(new Intent(SelectionActivity.this, RxBusActivity.class));
     }
+
+    public void startPaginationActivity(View view) {
+        startActivity(new Intent(SelectionActivity.this, PaginationActivity.class));
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
new file mode 100644
index 0000000..9ff9bb2
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
@@ -0,0 +1,145 @@
+package com.rxjava2.android.samples.ui.pagination;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.view.View;
+import android.widget.ProgressBar;
+
+import com.rxjava2.android.samples.R;
+
+import org.reactivestreams.Publisher;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Flowable;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.annotations.NonNull;
+import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.functions.Consumer;
+import io.reactivex.functions.Function;
+import io.reactivex.processors.PublishProcessor;
+
+/**
+ * Created by amitshekhar on 15/03/17.
+ */
+
+public class PaginationActivity extends AppCompatActivity {
+
+    public static final String TAG = PaginationActivity.class.getSimpleName();
+    private CompositeDisposable compositeDisposable = new CompositeDisposable();
+    private PublishProcessor<Integer> paginator = PublishProcessor.create();
+    private PaginationAdapter paginationAdapter;
+    private RecyclerView recyclerView;
+    private ProgressBar progressBar;
+    private boolean loading = false;
+    private int pageNumber = 1;
+    private int visibleThreshold = 3;
+    private int lastVisibleItem, totalItemCount;
+    private LinearLayoutManager layoutManager;
+
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_pagination);
+        recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
+        progressBar = (ProgressBar) findViewById(R.id.progressBar);
+        layoutManager = new LinearLayoutManager(this);
+        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
+        recyclerView.setLayoutManager(layoutManager);
+        paginationAdapter = new PaginationAdapter();
+        recyclerView.setAdapter(paginationAdapter);
+        setUpLoadMoreListener();
+        subscribeForData();
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        compositeDisposable.clear();
+    }
+
+    private void setUpLoadMoreListener() {
+        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
+            @Override
+            public void onScrolled(RecyclerView recyclerView,
+                                   int dx, int dy) {
+                super.onScrolled(recyclerView, dx, dy);
+
+                totalItemCount = layoutManager.getItemCount();
+                lastVisibleItem = layoutManager
+                        .findLastVisibleItemPosition();
+                if (!loading
+                        && totalItemCount <= (lastVisibleItem + visibleThreshold)) {
+                    pageNumber++;
+                    paginator.onNext(pageNumber);
+                    loading = true;
+                }
+            }
+        });
+    }
+
+    private void subscribeForData() {
+
+        Disposable disposable = paginator
+                .onBackpressureDrop()
+                .doOnNext(new Consumer<Integer>() {
+                    @Override
+                    public void accept(@NonNull Integer integer) throws Exception {
+                        loading = true;
+                        progressBar.setVisibility(View.VISIBLE);
+                    }
+                })
+                .concatMap(new Function<Integer, Publisher<List<String>>>() {
+                    @Override
+                    public Publisher<List<String>> apply(@NonNull Integer page) throws Exception {
+                        return dataFromNetwork(page);
+                    }
+                })
+                .observeOn(AndroidSchedulers.mainThread())
+                .map(new Function<List<String>, Boolean>() {
+                    @Override
+                    public Boolean apply(@NonNull List<String> items) throws Exception {
+                        paginationAdapter.addItems(items);
+                        paginationAdapter.notifyDataSetChanged();
+                        return true;
+                    }
+                })
+                .doOnNext(new Consumer<Boolean>() {
+                    @Override
+                    public void accept(@NonNull Boolean value) throws Exception {
+                        loading = false;
+                        progressBar.setVisibility(View.INVISIBLE);
+                    }
+                }).subscribe();
+
+        compositeDisposable.add(disposable);
+
+        paginator.onNext(pageNumber);
+
+    }
+
+    /**
+     * Simulation of network data
+     */
+    private Flowable<List<String>> dataFromNetwork(final int page) {
+        return Flowable.just(true)
+                .observeOn(AndroidSchedulers.mainThread())
+                .delay(2, TimeUnit.SECONDS)
+                .map(new Function<Boolean, List<String>>() {
+                    @Override
+                    public List<String> apply(@NonNull Boolean value) throws Exception {
+                        List<String> items = new ArrayList<>();
+                        for (int i = 1; i <= 10; i++) {
+                            items.add("Item " + (page * 10 + i));
+                        }
+                        return items;
+                    }
+                });
+    }
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationAdapter.java b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationAdapter.java
new file mode 100644
index 0000000..9c9d162
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationAdapter.java
@@ -0,0 +1,59 @@
+package com.rxjava2.android.samples.ui.pagination;
+
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by amitshekhar on 15/03/17.
+ */
+
+public class PaginationAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
+
+    List<String> items = new ArrayList<>();
+
+    public PaginationAdapter() {
+
+    }
+
+    void addItems(List<String> items) {
+        this.items.addAll(items);
+    }
+
+    @Override
+    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        return ItemViewHolder.create(parent);
+    }
+
+    @Override
+    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
+        ((ItemViewHolder) holder).bind(items.get(position));
+    }
+
+    @Override
+    public int getItemCount() {
+        return items.size();
+    }
+
+    private static class ItemViewHolder extends RecyclerView.ViewHolder {
+        ItemViewHolder(View itemView) {
+            super(itemView);
+        }
+
+        static ItemViewHolder create(ViewGroup parent) {
+            return new ItemViewHolder(
+                    LayoutInflater.from(parent.getContext()).inflate(R.layout.item_pagination, parent, false));
+        }
+
+        void bind(String content) {
+            ((TextView) itemView).setText(content);
+        }
+    }
+}
diff --git a/app/src/main/res/layout/activity_pagination.xml b/app/src/main/res/layout/activity_pagination.xml
new file mode 100644
index 0000000..f4a049b
--- /dev/null
+++ b/app/src/main/res/layout/activity_pagination.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <android.support.v7.widget.RecyclerView
+        android:id="@+id/recyclerView"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1" />
+
+    <ProgressBar
+        android:id="@+id/progressBar"
+        style="@style/Widget.AppCompat.ProgressBar.Horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:indeterminate="true"
+        android:visibility="invisible" />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_selection.xml b/app/src/main/res/layout/activity_selection.xml
index 3a0f1a7..afa4270 100644
--- a/app/src/main/res/layout/activity_selection.xml
+++ b/app/src/main/res/layout/activity_selection.xml
@@ -36,5 +36,12 @@
             android:text="@string/rx_bus"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startPaginationActivity"
+            android:text="@string/pagination"
+            android:textColor="@android:color/black" />
+
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/layout/item_pagination.xml b/app/src/main/res/layout/item_pagination.xml
new file mode 100644
index 0000000..3e38887
--- /dev/null
+++ b/app/src/main/res/layout/item_pagination.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/textView"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="@dimen/activity_horizontal_margin"
+    android:textSize="20sp" />
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index bef97e6..94ae0d7 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -3,6 +3,7 @@
     <string name="doSomeWork">doSomeWork</string>
     <string name="operators">Operators</string>
     <string name="networking">Networking</string>
+    <string name="pagination">Pagination</string>
     <string name="simple">Simple</string>
     <string name="map">Map</string>
     <string name="zip">Zip</string>

From 27181b77261bd5bac16d8f24bcd2817f0272c60c Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Wed, 15 Mar 2017 22:37:15 +0530
Subject: [PATCH 068/137] Update for Pagination for loadMore in RecyclerView

---
 README.md                                              |  1 +
 .../samples/ui/operators/DelayExampleActivity.java     | 10 +++++-----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index de475a8..5fde748 100644
--- a/README.md
+++ b/README.md
@@ -100,6 +100,7 @@ RxJava1 -> RxJava2
 * [DeferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java) - Using `defer` Observable
 * [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java) - Using `Interval`
 * [RxBusActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java) - RxBus, RxJava2Bus, EventBus, RxEventBus
+* [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView
 
 ### TODO 
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java
index 1633c98..2979e75 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java
@@ -55,12 +55,12 @@ private void doSomeWork() {
                 .subscribe(getObserver());
     }
 
-    private Observable<? extends Long> getObservable() {
-        return Observable.timer(2, TimeUnit.SECONDS);
+    private Observable<String> getObservable() {
+        return Observable.just("Amit");
     }
 
-    private Observer<Long> getObserver() {
-        return new Observer<Long>() {
+    private Observer<String> getObserver() {
+        return new Observer<String>() {
 
             @Override
             public void onSubscribe(Disposable d) {
@@ -68,7 +68,7 @@ public void onSubscribe(Disposable d) {
             }
 
             @Override
-            public void onNext(Long value) {
+            public void onNext(String value) {
                 textView.append(" onNext : value : " + value);
                 textView.append(AppConstant.LINE_SEPARATOR);
                 Log.d(TAG, " onNext : value : " + value);

From d8dbd3ea18eeb057f8f03c68e07d4b25fb00654c Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Thu, 16 Mar 2017 15:32:52 +0530
Subject: [PATCH 069/137] Add minor explanation for pagination

---
 .../samples/ui/pagination/PaginationActivity.java      | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
index 9ff9bb2..3cc0e24 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
@@ -38,7 +38,7 @@ public class PaginationActivity extends AppCompatActivity {
     private ProgressBar progressBar;
     private boolean loading = false;
     private int pageNumber = 1;
-    private int visibleThreshold = 3;
+    private final int VISIBLE_THRESHOLD = 3;
     private int lastVisibleItem, totalItemCount;
     private LinearLayoutManager layoutManager;
 
@@ -64,6 +64,9 @@ protected void onDestroy() {
         compositeDisposable.clear();
     }
 
+    /**
+     * setting listener to get callback for load more
+     */
     private void setUpLoadMoreListener() {
         recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
             @Override
@@ -75,7 +78,7 @@ public void onScrolled(RecyclerView recyclerView,
                 lastVisibleItem = layoutManager
                         .findLastVisibleItemPosition();
                 if (!loading
-                        && totalItemCount <= (lastVisibleItem + visibleThreshold)) {
+                        && totalItemCount <= (lastVisibleItem + VISIBLE_THRESHOLD)) {
                     pageNumber++;
                     paginator.onNext(pageNumber);
                     loading = true;
@@ -84,6 +87,9 @@ public void onScrolled(RecyclerView recyclerView,
         });
     }
 
+    /**
+     * subscribing for data
+     */
     private void subscribeForData() {
 
         Disposable disposable = paginator

From f06797da7d89aa47f89c3218d0ad567d691b764c Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 18 Mar 2017 10:48:07 +0530
Subject: [PATCH 070/137] Set VISIBLE_THRESHOLD to 1

---
 .../android/samples/ui/pagination/PaginationActivity.java       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
index 3cc0e24..362938c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
@@ -38,7 +38,7 @@ public class PaginationActivity extends AppCompatActivity {
     private ProgressBar progressBar;
     private boolean loading = false;
     private int pageNumber = 1;
-    private final int VISIBLE_THRESHOLD = 3;
+    private final int VISIBLE_THRESHOLD = 1;
     private int lastVisibleItem, totalItemCount;
     private LinearLayoutManager layoutManager;
 

From dafe68a5c8b6dc5a12b4d91fb6ed446532eff7d8 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 18 Mar 2017 10:50:34 +0530
Subject: [PATCH 071/137] Remove not required observeOn

---
 .../android/samples/ui/pagination/PaginationActivity.java        | 1 -
 1 file changed, 1 deletion(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
index 362938c..549af0f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
@@ -135,7 +135,6 @@ public void accept(@NonNull Boolean value) throws Exception {
      */
     private Flowable<List<String>> dataFromNetwork(final int page) {
         return Flowable.just(true)
-                .observeOn(AndroidSchedulers.mainThread())
                 .delay(2, TimeUnit.SECONDS)
                 .map(new Function<Boolean, List<String>>() {
                     @Override

From eac18001deac94999096c4aea5d3eaa906159b41 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 18 Mar 2017 11:00:04 +0530
Subject: [PATCH 072/137] Simplify pagination example

---
 .../ui/pagination/PaginationActivity.java     | 21 +++++--------------
 1 file changed, 5 insertions(+), 16 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
index 549af0f..b68b312 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
@@ -94,35 +94,24 @@ private void subscribeForData() {
 
         Disposable disposable = paginator
                 .onBackpressureDrop()
-                .doOnNext(new Consumer<Integer>() {
-                    @Override
-                    public void accept(@NonNull Integer integer) throws Exception {
-                        loading = true;
-                        progressBar.setVisibility(View.VISIBLE);
-                    }
-                })
                 .concatMap(new Function<Integer, Publisher<List<String>>>() {
                     @Override
                     public Publisher<List<String>> apply(@NonNull Integer page) throws Exception {
+                        loading = true;
+                        progressBar.setVisibility(View.VISIBLE);
                         return dataFromNetwork(page);
                     }
                 })
                 .observeOn(AndroidSchedulers.mainThread())
-                .map(new Function<List<String>, Boolean>() {
+                .subscribe(new Consumer<List<String>>() {
                     @Override
-                    public Boolean apply(@NonNull List<String> items) throws Exception {
+                    public void accept(@NonNull List<String> items) throws Exception {
                         paginationAdapter.addItems(items);
                         paginationAdapter.notifyDataSetChanged();
-                        return true;
-                    }
-                })
-                .doOnNext(new Consumer<Boolean>() {
-                    @Override
-                    public void accept(@NonNull Boolean value) throws Exception {
                         loading = false;
                         progressBar.setVisibility(View.INVISIBLE);
                     }
-                }).subscribe();
+                });
 
         compositeDisposable.add(disposable);
 

From d081a8b6800f7eed2f7d8508fc7547f27529ae83 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sun, 19 Mar 2017 10:56:22 +0530
Subject: [PATCH 073/137] Update Fast-Android-Networking to 1.0.0

---
 app/build.gradle                              |  2 +-
 .../android/samples/model/ApiUser.java        |  4 +--
 .../rxjava2/android/samples/model/User.java   | 12 +++----
 .../ui/operators/MapExampleActivity.java      |  2 +-
 .../ui/operators/ZipExampleActivity.java      |  2 +-
 .../rxjava2/android/samples/utils/Utils.java  | 32 +++++++++----------
 6 files changed, 27 insertions(+), 27 deletions(-)

diff --git a/app/build.gradle b/app/build.gradle
index 525d899..8b820a1 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -26,5 +26,5 @@ dependencies {
     compile 'com.android.support:recyclerview-v7:25.1.0'
     compile 'io.reactivex.rxjava2:rxjava:2.0.6'
     compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
-    compile 'com.amitshekhar.android:rx2-android-networking:0.0.1'
+    compile 'com.amitshekhar.android:rx2-android-networking:1.0.0'
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/model/ApiUser.java b/app/src/main/java/com/rxjava2/android/samples/model/ApiUser.java
index 715b150..09039ef 100644
--- a/app/src/main/java/com/rxjava2/android/samples/model/ApiUser.java
+++ b/app/src/main/java/com/rxjava2/android/samples/model/ApiUser.java
@@ -12,8 +12,8 @@ public class ApiUser {
     public String toString() {
         return "ApiUser{" +
                 "id=" + id +
-                ", firstName='" + firstname + '\'' +
-                ", lastName='" + lastname + '\'' +
+                ", firstname='" + firstname + '\'' +
+                ", lastname='" + lastname + '\'' +
                 '}';
     }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/model/User.java b/app/src/main/java/com/rxjava2/android/samples/model/User.java
index 19f492f..bb11397 100644
--- a/app/src/main/java/com/rxjava2/android/samples/model/User.java
+++ b/app/src/main/java/com/rxjava2/android/samples/model/User.java
@@ -5,8 +5,8 @@
  */
 public class User {
     public long id;
-    public String firstName;
-    public String lastName;
+    public String firstname;
+    public String lastname;
     public boolean isFollowing;
 
     public User() {
@@ -14,16 +14,16 @@ public User() {
 
     public User(ApiUser apiUser) {
         this.id = apiUser.id;
-        this.firstName = apiUser.firstname;
-        this.lastName = apiUser.lastname;
+        this.firstname = apiUser.firstname;
+        this.lastname = apiUser.lastname;
     }
 
     @Override
     public String toString() {
         return "User{" +
                 "id=" + id +
-                ", firstName='" + firstName + '\'' +
-                ", lastName='" + lastName + '\'' +
+                ", firstname='" + firstname + '\'' +
+                ", lastname='" + lastname + '\'' +
                 ", isFollowing=" + isFollowing +
                 '}';
     }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
index 0b50c1c..ccc6ace 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
@@ -95,7 +95,7 @@ public void onNext(List<User> userList) {
                 textView.append(" onNext");
                 textView.append(AppConstant.LINE_SEPARATOR);
                 for (User user : userList) {
-                    textView.append(" firstName : " + user.firstName);
+                    textView.append(" firstname : " + user.firstname);
                     textView.append(AppConstant.LINE_SEPARATOR);
                 }
                 Log.d(TAG, " onNext : " + userList.size());
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
index fa91c1e..af446f3 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
@@ -105,7 +105,7 @@ public void onNext(List<User> userList) {
                 textView.append(" onNext");
                 textView.append(AppConstant.LINE_SEPARATOR);
                 for (User user : userList) {
-                    textView.append(" firstName : " + user.firstName);
+                    textView.append(" firstname : " + user.firstname);
                     textView.append(AppConstant.LINE_SEPARATOR);
                 }
                 Log.d(TAG, " onNext : " + userList.size());
diff --git a/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java b/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
index aa13677..04695b2 100644
--- a/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
+++ b/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
@@ -23,18 +23,18 @@ public static List<User> getUserList() {
         List<User> userList = new ArrayList<>();
 
         User userOne = new User();
-        userOne.firstName = "Amit";
-        userOne.lastName = "Shekhar";
+        userOne.firstname = "Amit";
+        userOne.lastname = "Shekhar";
         userList.add(userOne);
 
         User userTwo = new User();
-        userTwo.firstName = "Manish";
-        userTwo.lastName = "Kumar";
+        userTwo.firstname = "Manish";
+        userTwo.lastname = "Kumar";
         userList.add(userTwo);
 
         User userThree = new User();
-        userThree.firstName = "Sumit";
-        userThree.lastName = "Kumar";
+        userThree.firstname = "Sumit";
+        userThree.lastname = "Kumar";
         userList.add(userThree);
 
         return userList;
@@ -68,8 +68,8 @@ public static List<User> convertApiUserListToUserList(List<ApiUser> apiUserList)
 
         for (ApiUser apiUser : apiUserList) {
             User user = new User();
-            user.firstName = apiUser.firstname;
-            user.lastName = apiUser.lastname;
+            user.firstname = apiUser.firstname;
+            user.lastname = apiUser.lastname;
             userList.add(user);
         }
 
@@ -82,14 +82,14 @@ public static List<User> getUserListWhoLovesCricket() {
 
         User userOne = new User();
         userOne.id = 1;
-        userOne.firstName = "Amit";
-        userOne.lastName = "Shekhar";
+        userOne.firstname = "Amit";
+        userOne.lastname = "Shekhar";
         userList.add(userOne);
 
         User userTwo = new User();
         userTwo.id = 2;
-        userTwo.firstName = "Manish";
-        userTwo.lastName = "Kumar";
+        userTwo.firstname = "Manish";
+        userTwo.lastname = "Kumar";
         userList.add(userTwo);
 
         return userList;
@@ -102,14 +102,14 @@ public static List<User> getUserListWhoLovesFootball() {
 
         User userOne = new User();
         userOne.id = 1;
-        userOne.firstName = "Amit";
-        userOne.lastName = "Shekhar";
+        userOne.firstname = "Amit";
+        userOne.lastname = "Shekhar";
         userList.add(userOne);
 
         User userTwo = new User();
         userTwo.id = 3;
-        userTwo.firstName = "Sumit";
-        userTwo.lastName = "Kumar";
+        userTwo.firstname = "Sumit";
+        userTwo.lastname = "Kumar";
         userList.add(userTwo);
 
         return userList;

From f4c69bb3cc88ab733b3b0e43603f401651c5d3d1 Mon Sep 17 00:00:00 2001
From: GongCheng <montycoding@outlook.com>
Date: Tue, 28 Mar 2017 16:33:01 +0800
Subject: [PATCH 074/137] fix word spelling mistake in RxBus

---
 .../main/java/com/rxjava2/android/samples/ui/rxbus/RxBus.java   | 2 +-
 .../com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBus.java b/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBus.java
index 88b7a9a..cdc81b0 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBus.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBus.java
@@ -18,7 +18,7 @@ public void send(Object o) {
         bus.onNext(o);
     }
 
-    public Observable<Object> toObserverable() {
+    public Observable<Object> toObservable() {
         return bus;
     }
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java
index 5caba89..2911b42 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java
@@ -41,7 +41,7 @@ protected void onCreate(Bundle savedInstanceState) {
 
         disposables.add(((MyApplication) getApplication())
                 .bus()
-                .toObserverable()
+                .toObservable()
                 .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Consumer<Object>() {

From b25817e70f8e7e94384bf443b1afae4c753cfd14 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 21 Apr 2017 14:35:00 +0530
Subject: [PATCH 075/137] Add Join Mindorks Community Badge

---
 README.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 5fde748..1c761fe 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@
 # Learning RxJava 2 for Android by example
 
 [![Mindorks](https://img.shields.io/badge/mindorks-opensource-blue.svg)](https://mindorks.com/open-source-projects)
+[![Mindorks Community](https://img.shields.io/badge/join-community-blue.svg)](https://mindorks.com/join-community)
 [![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-RxJava2%20Android%20Samples-blue.svg?style=flat)](https://android-arsenal.com/details/3/4314)
 [![Open Source Love](https://badges.frapsoft.com/os/v1/open-source.svg?v=102)](https://opensource.org/licenses/Apache-2.0)
 [![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/LICENSE)
@@ -147,4 +148,4 @@ RxJava1 -> RxJava2
 ### Contributing to RxJava 2 Android Samples
 Just make pull request. You are in!
 
- 
\ No newline at end of file
+ 

From ac69f07f4892682b87567d5253594ed5b1acaf3a Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sun, 7 May 2017 14:35:05 +0530
Subject: [PATCH 076/137] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 1c761fe..867d14c 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@
 [![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/LICENSE)
 
 ## How to use RxJava 2 in Android Application
-## How to migrate from RxJava 1 to RxJava 2
+## How to migrate from RxJava 1.0 to RxJava 2.0
 
 ### This project is for : 
 * who is migrating to RxJava 2 

From e8fbc22a21687f5d55edd93d10de163d6f6221e9 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sun, 7 May 2017 14:35:43 +0530
Subject: [PATCH 077/137] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 867d14c..449d064 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ RxJava 2.0 has been completely rewritten from scratch on top of the Reactive-Str
 Because Reactive-Streams has a different architecture, it mandates changes to some well known RxJava types.
 
 
-# Migration From RxJava 1 to RxJava 2
+# Migration From RxJava 1.0 to RxJava 2.0
 
 To allow having RxJava 1 and RxJava 2 side-by-side, RxJava 2 is under the maven coordinates 
 io.reactivex.rxjava2:rxjava:2.x.y and classes are accessible below io.reactivex.

From ce48977d64589a1b0d9dab0c48c4da95bfbd254c Mon Sep 17 00:00:00 2001
From: WeRockStar <kotchaphan.m@gmail.com>
Date: Fri, 19 May 2017 22:59:07 +0700
Subject: [PATCH 078/137] Update gradle wrapper

---
 gradle/wrapper/gradle-wrapper.properties | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 48443aa..ddbfadd 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.5-all.zip

From d930e73c2a7ec74fa8f0207b6b36dc9adcf84e40 Mon Sep 17 00:00:00 2001
From: WeRockStar <kotchaphan.m@gmail.com>
Date: Fri, 19 May 2017 23:18:37 +0700
Subject: [PATCH 079/137] Add compose for reusable code

---
 app/src/main/AndroidManifest.xml              |  3 +
 .../ComposeOperatorExampleActivity.java       | 32 ++++++++
 .../samples/ui/compose/RxSchedulers.java      | 75 +++++++++++++++++++
 .../activity_compose_operator_example.xml     |  9 +++
 app/src/main/res/values/strings.xml           |  1 +
 5 files changed, 120 insertions(+)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/compose/RxSchedulers.java
 create mode 100644 app/src/main/res/layout/activity_compose_operator_example.xml

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index a6a3957..9b4c4f7 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -120,6 +120,9 @@
         <activity
             android:name=".ui.operators.DelayExampleActivity"
             android:label="@string/delay" />
+        <activity android:name=".ui.compose.ComposeOperatorExampleActivity"
+            android:label="@string/compose"
+            />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java
new file mode 100644
index 0000000..faf2291
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java
@@ -0,0 +1,32 @@
+package com.rxjava2.android.samples.ui.compose;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+
+import com.rxjava2.android.samples.R;
+
+import io.reactivex.Flowable;
+import io.reactivex.Observable;
+
+public class ComposeOperatorExampleActivity extends AppCompatActivity {
+
+    private RxSchedulers schedulers = new RxSchedulers();
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_compose_operator_example);
+
+        /*
+            Compose for reusable code.
+         */
+        Observable.just(1, 2, 3, 4, 5)
+                .compose(schedulers.<Integer>applyObservableAsync())
+                .subscribe(/* */);
+
+        Flowable.just(1, 2, 3, 4, 5)
+                .compose(schedulers.<Integer>applyFlowableAsysnc())
+                .subscribe(/* */);
+
+    }
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/compose/RxSchedulers.java b/app/src/main/java/com/rxjava2/android/samples/ui/compose/RxSchedulers.java
new file mode 100644
index 0000000..6be576c
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/compose/RxSchedulers.java
@@ -0,0 +1,75 @@
+package com.rxjava2.android.samples.ui.compose;
+
+import org.reactivestreams.Publisher;
+
+import io.reactivex.Flowable;
+import io.reactivex.FlowableTransformer;
+import io.reactivex.Observable;
+import io.reactivex.ObservableSource;
+import io.reactivex.ObservableTransformer;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by werockstar on 5/19/2017.
+ */
+
+public class RxSchedulers {
+
+    public <T> ObservableTransformer<T, T> applyObservableAsync() {
+        return new ObservableTransformer<T, T>() {
+            @Override
+            public ObservableSource<T> apply(Observable<T> observable) {
+                return observable.subscribeOn(Schedulers.io())
+                        .observeOn(AndroidSchedulers.mainThread());
+            }
+        };
+    }
+
+    public <T> ObservableTransformer<T, T> applyObservableCompute() {
+        return new ObservableTransformer<T, T>() {
+            @Override
+            public ObservableSource<T> apply(Observable<T> observable) {
+                return observable.subscribeOn(Schedulers.computation())
+                        .observeOn(AndroidSchedulers.mainThread());
+            }
+        };
+    }
+
+    public <T> ObservableTransformer<T, T> applyObservableMainThread() {
+        return new ObservableTransformer<T, T>() {
+            @Override
+            public ObservableSource<T> apply(Observable<T> observable) {
+                return observable.observeOn(AndroidSchedulers.mainThread());
+            }
+        };
+    }
+
+    public <T> FlowableTransformer<T, T> applyFlowableMainThread() {
+        return new FlowableTransformer<T, T>() {
+            @Override
+            public Publisher<T> apply(Flowable<T> flowable) {
+                return flowable.observeOn(AndroidSchedulers.mainThread());
+            }
+        };
+    }
+
+    public <T> FlowableTransformer<T, T> applyFlowableAsysnc() {
+        return new FlowableTransformer<T, T>() {
+            @Override
+            public Publisher<T> apply(Flowable<T> flowable) {
+                return flowable.observeOn(AndroidSchedulers.mainThread());
+            }
+        };
+    }
+
+    public <T> FlowableTransformer<T, T> applyFlowableCompute() {
+        return new FlowableTransformer<T, T>() {
+            @Override
+            public Publisher<T> apply(Flowable<T> flowable) {
+                return flowable.observeOn(AndroidSchedulers.mainThread());
+            }
+        };
+    }
+
+}
diff --git a/app/src/main/res/layout/activity_compose_operator_example.xml b/app/src/main/res/layout/activity_compose_operator_example.xml
new file mode 100644
index 0000000..7783403
--- /dev/null
+++ b/app/src/main/res/layout/activity_compose_operator_example.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="com.rxjava2.android.samples.ui.compose.ComposeOperatorExampleActivity">
+
+</android.support.constraint.ConstraintLayout>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 94ae0d7..cdd27c4 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -39,4 +39,5 @@
     <string name="flatMapWithZip">flatMapWithZip</string>
     <string name="click_me">Click Me</string>
     <string name="rx_bus">RxBus</string>
+    <string name="compose">Compose for reusable</string>
 </resources>

From caac4fc9a1bbfb222e76a99ff3f446c827b01019 Mon Sep 17 00:00:00 2001
From: WeRockStar <kotchaphan.m@gmail.com>
Date: Fri, 19 May 2017 23:33:54 +0700
Subject: [PATCH 080/137] Add navigation to compose activity

---
 .../com/rxjava2/android/samples/ui/SelectionActivity.java  | 5 +++++
 .../main/res/layout/activity_compose_operator_example.xml  | 5 ++---
 app/src/main/res/layout/activity_selection.xml             | 7 +++++++
 3 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
index 87ede3c..e431b0a 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
@@ -7,6 +7,7 @@
 
 import com.rxjava2.android.samples.MyApplication;
 import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.ui.compose.ComposeOperatorExampleActivity;
 import com.rxjava2.android.samples.ui.networking.NetworkingActivity;
 import com.rxjava2.android.samples.ui.pagination.PaginationActivity;
 import com.rxjava2.android.samples.ui.rxbus.RxBusActivity;
@@ -35,4 +36,8 @@ public void startRxBusActivity(View view) {
     public void startPaginationActivity(View view) {
         startActivity(new Intent(SelectionActivity.this, PaginationActivity.class));
     }
+
+    public void startComposeOperator(View view) {
+        startActivity(new Intent(SelectionActivity.this, ComposeOperatorExampleActivity.class));
+    }
 }
diff --git a/app/src/main/res/layout/activity_compose_operator_example.xml b/app/src/main/res/layout/activity_compose_operator_example.xml
index 7783403..0f6e27c 100644
--- a/app/src/main/res/layout/activity_compose_operator_example.xml
+++ b/app/src/main/res/layout/activity_compose_operator_example.xml
@@ -1,9 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context="com.rxjava2.android.samples.ui.compose.ComposeOperatorExampleActivity">
 
-</android.support.constraint.ConstraintLayout>
+</FrameLayout>
diff --git a/app/src/main/res/layout/activity_selection.xml b/app/src/main/res/layout/activity_selection.xml
index afa4270..063101a 100644
--- a/app/src/main/res/layout/activity_selection.xml
+++ b/app/src/main/res/layout/activity_selection.xml
@@ -43,5 +43,12 @@
             android:text="@string/pagination"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startComposeOperator"
+            android:text="@string/compose"
+            android:textColor="@android:color/black" />
+
     </LinearLayout>
 </ScrollView>

From 0061559b8cd78b0fb8c38074c14be85cfe25271e Mon Sep 17 00:00:00 2001
From: WeRockStar <kotchaphan.m@gmail.com>
Date: Fri, 19 May 2017 23:35:58 +0700
Subject: [PATCH 081/137] Update README.md

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 449d064..9ee2095 100644
--- a/README.md
+++ b/README.md
@@ -102,6 +102,7 @@ RxJava1 -> RxJava2
 * [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java) - Using `Interval`
 * [RxBusActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java) - RxBus, RxJava2Bus, EventBus, RxEventBus
 * [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView
+* [ComposeOperatorExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java) - Compose operator for reusable
 
 ### TODO 
 

From 77b4be56972c4e813f6fd09b116b1d27b4ab5b49 Mon Sep 17 00:00:00 2001
From: IvanLepi <lepojevicivand3@gmail.com>
Date: Mon, 29 May 2017 13:03:08 +0200
Subject: [PATCH 082/137] Add comments

---
 .../android/samples/ui/operators/DistinctExampleActivity.java | 4 +++-
 .../samples/ui/operators/LastOperatorExampleActivity.java     | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
index 76665ec..8e5f2f6 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
@@ -39,7 +39,9 @@ public void onClick(View view) {
         });
     }
 
-
+    /*
+     * distinct() suppresses duplicate items emitted by the source Observable.
+     */
     private void doSomeWork() {
 
         getObservable()
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
index 3b0282c..b1c86ff 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
@@ -40,6 +40,9 @@ public void onClick(View view) {
         });
     }
 
+    /*
+    * last() emits only the last item emitted by the Observable.
+    */
     private void doSomeWork() {
         getObservable().last("A1") // the default item ("A1") to emit if the source ObservableSource is empty
                 .subscribe(getObserver());

From e54815a07de9b8adec15ef24be6d76665e9ab0d6 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 19 Jun 2017 23:45:45 +0530
Subject: [PATCH 083/137] Fix GitHub MD

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 9ee2095..12a71f5 100644
--- a/README.md
+++ b/README.md
@@ -120,7 +120,7 @@ RxJava1 -> RxJava2
 ### Another awesome library for debugging databases and shared preferences.
 * [Android Debug Database](https://github.com/amitshekhariitbhu/Android-Debug-Database)
 
-###[Check out Mindorks awesome open source projects here](https://mindorks.com/open-source-projects)
+### [Check out Mindorks awesome open source projects here](https://mindorks.com/open-source-projects)
 
 ### Contact - Let's become friend
 - [Twitter](https://twitter.com/amitiitbhu)

From e54dcad4611c5e6b0e7f4207015f205fc7711298 Mon Sep 17 00:00:00 2001
From: amitshekhariitbhu <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 7 Jul 2017 08:57:20 +0530
Subject: [PATCH 084/137] Bump RxJava2 Version to 2.1.1

---
 app/build.gradle | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/build.gradle b/app/build.gradle
index 8b820a1..62fe87b 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -24,7 +24,7 @@ dependencies {
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:25.1.0'
     compile 'com.android.support:recyclerview-v7:25.1.0'
-    compile 'io.reactivex.rxjava2:rxjava:2.0.6'
+    compile 'io.reactivex.rxjava2:rxjava:2.1.1'
     compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
     compile 'com.amitshekhar.android:rx2-android-networking:1.0.0'
 }

From 74a6a33aca609453da646b3f05e9caebba7adb14 Mon Sep 17 00:00:00 2001
From: WeRockStar <kotchaphan.m@gmail.com>
Date: Mon, 31 Jul 2017 14:36:25 +0700
Subject: [PATCH 085/137] Update README.md RxJava version

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 12a71f5..9d9710c 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ Users switching from 1.x to 2.x have to re-organize their imports, but carefully
 
 Add this in your build.gradle
 ```groovy
-compile 'io.reactivex.rxjava2:rxjava:2.0.6'
+compile 'io.reactivex.rxjava2:rxjava:2.1.1'
 ```
 If you are using RxAndroid also, then add the following
 ```groovy

From 84f1c3b8c49ab4ed9082025a97841a927105a73a Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Thu, 3 Aug 2017 19:52:00 +0530
Subject: [PATCH 086/137] Add RxJava Course Link

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 9d9710c..60fd7a2 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,8 @@
 [![Open Source Love](https://badges.frapsoft.com/os/v1/open-source.svg?v=102)](https://opensource.org/licenses/Apache-2.0)
 [![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/LICENSE)
 
+### [Get the complete RxJava Course Here](https://mindorks.com/course/learn-rxjava)
+
 ## How to use RxJava 2 in Android Application
 ## How to migrate from RxJava 1.0 to RxJava 2.0
 

From fd135d548d96aff197c56baaff31bf138f89d4e5 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 13 Oct 2017 09:26:38 +0530
Subject: [PATCH 087/137] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 60fd7a2..086b4a3 100644
--- a/README.md
+++ b/README.md
@@ -102,7 +102,7 @@ RxJava1 -> RxJava2
 * [MergeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java) - Using `merge` Operator
 * [DeferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java) - Using `defer` Observable
 * [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java) - Using `Interval`
-* [RxBusActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java) - RxBus, RxJava2Bus, EventBus, RxEventBus
+* [RxBusActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java) - RxBus, RxJava2Bus, EventBus, RxEventBus, [Blog for reference](https://blog.mindorks.com/implementing-eventbus-with-rxjava-rxbus-e6c940a94bd8)
 * [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView
 * [ComposeOperatorExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java) - Compose operator for reusable
 

From 91e7afc11e370d40123f17d8777f377da7260e40 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sun, 15 Oct 2017 21:06:08 +0530
Subject: [PATCH 088/137] Add search example

---
 app/src/main/AndroidManifest.xml              |  9 +-
 .../android/samples/ui/SelectionActivity.java |  6 ++
 .../samples/ui/search/RxSearchObservable.java | 38 ++++++++
 .../samples/ui/search/SearchActivity.java     | 86 +++++++++++++++++++
 app/src/main/res/layout/activity_search.xml   | 26 ++++++
 .../main/res/layout/activity_selection.xml    |  7 ++
 app/src/main/res/values/strings.xml           |  2 +
 7 files changed, 171 insertions(+), 3 deletions(-)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/search/RxSearchObservable.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java
 create mode 100644 app/src/main/res/layout/activity_search.xml

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 9b4c4f7..c61e200 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -30,6 +30,9 @@
         <activity
             android:name=".ui.pagination.PaginationActivity"
             android:label="@string/pagination" />
+        <activity
+            android:name=".ui.search.SearchActivity"
+            android:label="@string/search" />
         <activity
             android:name=".ui.operators.SimpleExampleActivity"
             android:label="@string/simple" />
@@ -120,9 +123,9 @@
         <activity
             android:name=".ui.operators.DelayExampleActivity"
             android:label="@string/delay" />
-        <activity android:name=".ui.compose.ComposeOperatorExampleActivity"
-            android:label="@string/compose"
-            />
+        <activity
+            android:name=".ui.compose.ComposeOperatorExampleActivity"
+            android:label="@string/compose" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
index e431b0a..d3c6082 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
@@ -11,6 +11,7 @@
 import com.rxjava2.android.samples.ui.networking.NetworkingActivity;
 import com.rxjava2.android.samples.ui.pagination.PaginationActivity;
 import com.rxjava2.android.samples.ui.rxbus.RxBusActivity;
+import com.rxjava2.android.samples.ui.search.SearchActivity;
 
 public class SelectionActivity extends AppCompatActivity {
 
@@ -40,4 +41,9 @@ public void startPaginationActivity(View view) {
     public void startComposeOperator(View view) {
         startActivity(new Intent(SelectionActivity.this, ComposeOperatorExampleActivity.class));
     }
+
+    public void startSearchActivity(View view) {
+        startActivity(new Intent(SelectionActivity.this, SearchActivity.class));
+    }
+
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/search/RxSearchObservable.java b/app/src/main/java/com/rxjava2/android/samples/ui/search/RxSearchObservable.java
new file mode 100644
index 0000000..6360030
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/search/RxSearchObservable.java
@@ -0,0 +1,38 @@
+package com.rxjava2.android.samples.ui.search;
+
+import android.widget.SearchView;
+
+import io.reactivex.Observable;
+import io.reactivex.subjects.PublishSubject;
+
+/**
+ * Created by amitshekhar on 15/10/17.
+ */
+
+public class RxSearchObservable {
+
+    private RxSearchObservable() {
+        // no instance
+    }
+
+    public static Observable<String> fromView(SearchView searchView) {
+
+        final PublishSubject<String> subject = PublishSubject.create();
+
+        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
+            @Override
+            public boolean onQueryTextSubmit(String s) {
+                subject.onComplete();
+                return true;
+            }
+
+            @Override
+            public boolean onQueryTextChange(String text) {
+                subject.onNext(text);
+                return true;
+            }
+        });
+
+        return subject;
+    }
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java
new file mode 100644
index 0000000..2382286
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java
@@ -0,0 +1,86 @@
+package com.rxjava2.android.samples.ui.search;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.widget.SearchView;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableSource;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.annotations.NonNull;
+import io.reactivex.functions.Consumer;
+import io.reactivex.functions.Function;
+import io.reactivex.functions.Predicate;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by amitshekhar on 15/10/17.
+ */
+
+public class SearchActivity extends AppCompatActivity {
+
+    public static final String TAG = SearchActivity.class.getSimpleName();
+    private SearchView searchView;
+    private TextView textViewResult;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_search);
+        searchView = (SearchView) findViewById(R.id.searchView);
+        textViewResult = (TextView) findViewById(R.id.textViewResult);
+
+        setUpSearchObservable();
+    }
+
+    private void setUpSearchObservable() {
+        RxSearchObservable.fromView(searchView)
+                .debounce(300, TimeUnit.MILLISECONDS)
+                .filter(new Predicate<String>() {
+                    @Override
+                    public boolean test(String text) throws Exception {
+                        if (text.isEmpty()) {
+                            textViewResult.setText("");
+                            return false;
+                        } else {
+                            return true;
+                        }
+                    }
+                })
+                .distinctUntilChanged()
+                .switchMap(new Function<String, ObservableSource<String>>() {
+                    @Override
+                    public ObservableSource<String> apply(String query) throws Exception {
+                        return dataFromNetwork(query);
+                    }
+                })
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(new Consumer<String>() {
+                    @Override
+                    public void accept(String result) throws Exception {
+                        textViewResult.setText(result);
+                    }
+                });
+    }
+
+    /**
+     * Simulation of network data
+     */
+    private Observable<String> dataFromNetwork(final String query) {
+        return Observable.just(true)
+                .delay(2, TimeUnit.SECONDS)
+                .map(new Function<Boolean, String>() {
+                    @Override
+                    public String apply(@NonNull Boolean value) throws Exception {
+                        return query;
+                    }
+                });
+    }
+
+}
diff --git a/app/src/main/res/layout/activity_search.xml b/app/src/main/res/layout/activity_search.xml
new file mode 100644
index 0000000..206b962
--- /dev/null
+++ b/app/src/main/res/layout/activity_search.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+
+    <SearchView
+        android:id="@+id/searchView"
+        android:layout_width="match_parent"
+        android:layout_height="48dp">
+
+    </SearchView>
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/result" />
+
+    <TextView
+        android:id="@+id/textViewResult"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_selection.xml b/app/src/main/res/layout/activity_selection.xml
index 063101a..2c42930 100644
--- a/app/src/main/res/layout/activity_selection.xml
+++ b/app/src/main/res/layout/activity_selection.xml
@@ -50,5 +50,12 @@
             android:text="@string/compose"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startSearchActivity"
+            android:text="@string/search"
+            android:textColor="@android:color/black" />
+
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index cdd27c4..3c4375f 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -4,6 +4,7 @@
     <string name="operators">Operators</string>
     <string name="networking">Networking</string>
     <string name="pagination">Pagination</string>
+    <string name="search">Search</string>
     <string name="simple">Simple</string>
     <string name="map">Map</string>
     <string name="zip">Zip</string>
@@ -40,4 +41,5 @@
     <string name="click_me">Click Me</string>
     <string name="rx_bus">RxBus</string>
     <string name="compose">Compose for reusable</string>
+    <string name="result">Result</string>
 </resources>

From dc1cada596c57d9edd53eaa1bf31bfd526c4f10b Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 17 Oct 2017 08:00:40 +0530
Subject: [PATCH 089/137] Add search implementation blog link

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 086b4a3..cba8124 100644
--- a/README.md
+++ b/README.md
@@ -105,6 +105,7 @@ RxJava1 -> RxJava2
 * [RxBusActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java) - RxBus, RxJava2Bus, EventBus, RxEventBus, [Blog for reference](https://blog.mindorks.com/implementing-eventbus-with-rxjava-rxbus-e6c940a94bd8)
 * [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView
 * [ComposeOperatorExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java) - Compose operator for reusable
+* [Search Implementation](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java) - Using `debounce`, `switchMap`, `distinctUntilChanged`, [Blog for reference](https://blog.mindorks.com/implement-search-using-rxjava-operators-c8882b64fe1d)
 
 ### TODO 
 

From 00da79f96e4dddef3730c2b1189dcfb54a1552bb Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sun, 3 Dec 2017 10:40:01 +0530
Subject: [PATCH 090/137] Create CONTRIBUTING.md

---
 CONTRIBUTING.md | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 CONTRIBUTING.md

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..3741d94
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,9 @@
+# Contributing
+
+1. Fork it!
+2. Checkout the development branch: `git checkout development`
+3. Create your feature branch: `git checkout -b my-new-feature`
+4. Add your changes to the index: `git add .`
+5. Commit your changes: `git commit -m 'Add some feature'`
+6. Push to the branch: `git push origin my-new-feature`
+7. Submit a pull request against the `development` branch

From 1ff147f78fa46f4c8155c84466b97f2df82a7b26 Mon Sep 17 00:00:00 2001
From: roman-yu <romanyu827@gmail.com>
Date: Tue, 16 Jan 2018 12:13:51 +0800
Subject: [PATCH 091/137] Fix throttleFirst comment.

---
 .../ui/operators/ThrottleFirstExampleActivity.java        | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
index 28c6ae7..941dd4d 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
@@ -67,15 +67,15 @@ private Observable<Integer> getObservable() {
             public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
                 // send events with simulated time wait
                 Thread.sleep(0);
-                emitter.onNext(1); // skip
-                emitter.onNext(2); // deliver
+                emitter.onNext(1); // deliver
+                emitter.onNext(2); // skip
                 Thread.sleep(505);
-                emitter.onNext(3); // skip
+                emitter.onNext(3); // deliver
                 Thread.sleep(99);
                 emitter.onNext(4); // skip
                 Thread.sleep(100);
                 emitter.onNext(5); // skip
-                emitter.onNext(6); // deliver
+                emitter.onNext(6); // skip
                 Thread.sleep(305);
                 emitter.onNext(7); // deliver
                 Thread.sleep(510);

From 1ef6be3f5fc63f8ea6f3c1ed5e8b52d9ed68f2ca Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 3 Feb 2018 09:38:37 +0530
Subject: [PATCH 092/137] Add Kotlin MVP link

---
 README.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/README.md b/README.md
index cba8124..d0fe653 100644
--- a/README.md
+++ b/README.md
@@ -117,6 +117,9 @@ RxJava1 -> RxJava2
 ### Check out an awesome MVP architecture based project which uses RxJava2, Dagger2.
 * [Android-MVP-Architecture](https://github.com/MindorksOpenSource/android-mvp-architecture)
 
+### Check out an awesome Kotlin MVP architecture based project which uses RxJava2, Dagger2.
+* [Android-Kotli-MVP-Architecture](https://github.com/MindorksOpenSource/android-kotlin-mvp-architecture)
+
 ### Check out an awesome library for fast and simple networking in Android.
 * [Fast Android Networking Library](https://github.com/amitshekhariitbhu/Fast-Android-Networking)
 

From 8a6c7168f44b5664313618aa5ed866ca1242d426 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 3 Feb 2018 09:39:03 +0530
Subject: [PATCH 093/137] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index d0fe653..6073ac1 100644
--- a/README.md
+++ b/README.md
@@ -118,7 +118,7 @@ RxJava1 -> RxJava2
 * [Android-MVP-Architecture](https://github.com/MindorksOpenSource/android-mvp-architecture)
 
 ### Check out an awesome Kotlin MVP architecture based project which uses RxJava2, Dagger2.
-* [Android-Kotli-MVP-Architecture](https://github.com/MindorksOpenSource/android-kotlin-mvp-architecture)
+* [Android-Kotlin-MVP-Architecture](https://github.com/MindorksOpenSource/android-kotlin-mvp-architecture)
 
 ### Check out an awesome library for fast and simple networking in Android.
 * [Fast Android Networking Library](https://github.com/amitshekhariitbhu/Fast-Android-Networking)

From 60231d1c1609f711f1537becc187fc6ae2894922 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 26 Feb 2018 11:02:02 +0530
Subject: [PATCH 094/137] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 6073ac1..8bc969b 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 [![Open Source Love](https://badges.frapsoft.com/os/v1/open-source.svg?v=102)](https://opensource.org/licenses/Apache-2.0)
 [![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/LICENSE)
 
-### [Get the complete RxJava Course Here](https://mindorks.com/course/learn-rxjava)
+### Get the complete RxJava Course [here](https://mindorks.com/course/learn-rxjava)
 
 ## How to use RxJava 2 in Android Application
 ## How to migrate from RxJava 1.0 to RxJava 2.0

From 04e14e6bd676c763cc4fc998e82031a21f380ccb Mon Sep 17 00:00:00 2001
From: Amadeu Cavalcante <amadeu01@gmail.com>
Date: Fri, 2 Mar 2018 10:01:04 -0300
Subject: [PATCH 095/137] Update Highlights Exemples

Added PublishSubjectExampleActivity to highlights exemple section
---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 8bc969b..59faf32 100644
--- a/README.md
+++ b/README.md
@@ -106,6 +106,7 @@ RxJava1 -> RxJava2
 * [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView
 * [ComposeOperatorExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java) - Compose operator for reusable
 * [Search Implementation](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java) - Using `debounce`, `switchMap`, `distinctUntilChanged`, [Blog for reference](https://blog.mindorks.com/implement-search-using-rxjava-operators-c8882b64fe1d)
+* [PublishSubjectExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java)
 
 ### TODO 
 

From 56cfab0a81fbf00a3e07449cbafc8eeaab7f884b Mon Sep 17 00:00:00 2001
From: sdsyjh <sdsyjh@qq.com>
Date: Tue, 6 Mar 2018 15:45:34 +0800
Subject: [PATCH 096/137] grandle failed.

---
 gradle.properties | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/gradle.properties b/gradle.properties
index 1f8fad9..aac7c9b 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,17 +1,17 @@
-## Project-wide Gradle settings.
-#
+# Project-wide Gradle settings.
+
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+
 # For more details on how to configure your build environment visit
 # http://www.gradle.org/docs/current/userguide/build_environment.html
-#
+
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
-# Default value: -Xmx1024m -XX:MaxPermSize=256m
-# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
-#
+org.gradle.jvmargs=-Xmx1536m
+
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
-#Fri Jan 06 16:06:01 CST 2017
-systemProp.http.proxyHost=127.0.0.1
-systemProp.http.proxyPort=1086

From 00283015825bd68afd068d24e49bb7b867b404f8 Mon Sep 17 00:00:00 2001
From: Chandler <dc9909@hotmail.com>
Date: Wed, 4 Apr 2018 22:58:36 +1200
Subject: [PATCH 097/137] Optimize time complexity of filterUserWhoLovesBoth

---
 .../rxjava2/android/samples/model/User.java    | 18 ++++++++++++++++++
 .../ui/networking/NetworkingActivity.java      | 10 +++++-----
 2 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/model/User.java b/app/src/main/java/com/rxjava2/android/samples/model/User.java
index bb11397..6fb84ad 100644
--- a/app/src/main/java/com/rxjava2/android/samples/model/User.java
+++ b/app/src/main/java/com/rxjava2/android/samples/model/User.java
@@ -27,4 +27,22 @@ public String toString() {
                 ", isFollowing=" + isFollowing +
                 '}';
     }
+
+    @Override
+    public int hashCode() {
+        return (int) id + firstname.hashCode() + lastname.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj instanceof User) {
+            User user = (User) obj;
+
+            return this.id == user.id
+                    && this.firstname.equals(user.firstname)
+                    && this.lastname.equals(user.lastname);
+        }
+
+        return false;
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
index f651870..d643ae3 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
@@ -152,13 +152,13 @@ public void onComplete() {
 
     private List<User> filterUserWhoLovesBoth(List<User> cricketFans, List<User> footballFans) {
         List<User> userWhoLovesBoth = new ArrayList<>();
-        for (User cricketFan : cricketFans) {
-            for (User footballFan : footballFans) {
-                if (cricketFan.id == footballFan.id) {
-                    userWhoLovesBoth.add(cricketFan);
-                }
+
+        for (User footballFan : footballFans) {
+            if (cricketFans.contains(footballFan)) {
+                userWhoLovesBoth.add(footballFan);
             }
         }
+
         return userWhoLovesBoth;
     }
 

From 1c323b5510d6bcf2034b9915085ecbe3b60c8580 Mon Sep 17 00:00:00 2001
From: Thanh Tuan <thanhtuan@Dan.local>
Date: Thu, 26 Apr 2018 17:10:13 +0700
Subject: [PATCH 098/137] implement switch map operator sample

---
 README.md                                     |   2 +
 app/src/main/AndroidManifest.xml              |   2 +
 .../android/samples/ui/OperatorsActivity.java |   4 +
 .../operators/SwitchMapExampleActivity.java   | 105 ++++++++++++++++++
 .../main/res/layout/activity_operators.xml    |   7 ++
 app/src/main/res/values/strings.xml           |   1 +
 6 files changed, 121 insertions(+)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java

diff --git a/README.md b/README.md
index cba8124..fd697b0 100644
--- a/README.md
+++ b/README.md
@@ -82,6 +82,7 @@ RxJava1 -> RxJava2
 * `Concat` -> emit the emissions from two or more Observables without interleaving them
 * `Replay` -> ensure that all observers see the same sequence of emitted items, even if they subscribe after the Observable has begun emitting items
 * `Merge` -> combine multiple Observables into one by merging their emissions
+* `SwitchMap` -> ransform the items emitted by an Observable into Observables, and mirror those items emitted by the most-recently transformed Observable
 
 
 # Highlights of the examples :
@@ -101,6 +102,7 @@ RxJava1 -> RxJava2
 * [ConcatExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java) - Using `concat` Operator
 * [MergeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java) - Using `merge` Operator
 * [DeferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java) - Using `defer` Observable
+* [SwitchMapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java) - Using `switchMap` Observable
 * [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java) - Using `Interval`
 * [RxBusActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java) - RxBus, RxJava2Bus, EventBus, RxEventBus, [Blog for reference](https://blog.mindorks.com/implementing-eventbus-with-rxjava-rxbus-e6c940a94bd8)
 * [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index c61e200..ec63671 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -126,6 +126,8 @@
         <activity
             android:name=".ui.compose.ComposeOperatorExampleActivity"
             android:label="@string/compose" />
+        <activity android:name=".ui.operators.SwitchMapExampleActivity"
+            android:label="@string/switch_map" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
index 63df8a2..674d760 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
@@ -30,6 +30,7 @@
 import com.rxjava2.android.samples.ui.operators.SimpleExampleActivity;
 import com.rxjava2.android.samples.ui.operators.SingleObserverExampleActivity;
 import com.rxjava2.android.samples.ui.operators.SkipExampleActivity;
+import com.rxjava2.android.samples.ui.operators.SwitchMapExampleActivity;
 import com.rxjava2.android.samples.ui.operators.TakeExampleActivity;
 import com.rxjava2.android.samples.ui.operators.ThrottleFirstExampleActivity;
 import com.rxjava2.android.samples.ui.operators.ThrottleLastExampleActivity;
@@ -165,4 +166,7 @@ public void startDelayActivity(View view) {
         startActivity(new Intent(OperatorsActivity.this,DelayExampleActivity.class));
     }
 
+    public void startSwitchMapActivity(View view) {
+        startActivity(new Intent(OperatorsActivity.this, SwitchMapExampleActivity.class));
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java
new file mode 100644
index 0000000..127d611
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java
@@ -0,0 +1,105 @@
+package com.rxjava2.android.samples.ui.operators;
+
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableSource;
+import io.reactivex.Observer;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.functions.Function;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Created by thanhtuan on 26/04/18.
+ */
+public class SwitchMapExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = SwitchMapExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /* whenever a new item is emitted by the source Observable, it will unsubscribe to and stop
+     * mirroring the Observable that was generated from the previously-emitted item,
+     * and begin only mirroring the current one.
+     *
+     * Result: 5x
+     */
+    private void doSomeWork() {
+        getObservable()
+                .switchMap(new Function<Integer, ObservableSource<String>>() {
+                    @Override
+                    public ObservableSource<String> apply(Integer integer) {
+                        int delay = new Random().nextInt(2);
+
+                        return Observable.just(integer.toString() + "x")
+                                .delay(delay, TimeUnit.SECONDS, Schedulers.io());
+                    }
+                })
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getObserver());
+    }
+
+    private Observable<Integer> getObservable() {
+        return Observable.just(1, 2, 3, 4, 5);
+    }
+
+    private Observer<String> getObserver() {
+        return new Observer<String>() {
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(String value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext value : " + value);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+}
diff --git a/app/src/main/res/layout/activity_operators.xml b/app/src/main/res/layout/activity_operators.xml
index 1c453de..7a3c41c 100644
--- a/app/src/main/res/layout/activity_operators.xml
+++ b/app/src/main/res/layout/activity_operators.xml
@@ -225,5 +225,12 @@
             android:text="@string/delay"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startSwitchMapActivity"
+            android:text="@string/switch_map"
+            android:textColor="@android:color/black" />
+
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 3c4375f..8f3273f 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -42,4 +42,5 @@
     <string name="rx_bus">RxBus</string>
     <string name="compose">Compose for reusable</string>
     <string name="result">Result</string>
+    <string name="switch_map">Switch Map</string>
 </resources>

From e4f2609e7cb73b95038567b24e14b5d4bbdab977 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 3 Aug 2018 07:40:19 +0530
Subject: [PATCH 099/137] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 277e9ca..7626ec1 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 
 [![Mindorks](https://img.shields.io/badge/mindorks-opensource-blue.svg)](https://mindorks.com/open-source-projects)
 [![Mindorks Community](https://img.shields.io/badge/join-community-blue.svg)](https://mindorks.com/join-community)
-[![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-RxJava2%20Android%20Samples-blue.svg?style=flat)](https://android-arsenal.com/details/3/4314)
+[![Mindorks Android Store](https://img.shields.io/badge/Mindorks%20Android%20Store-Android%20Debug%20Database-blue.svg?style=flat)](https://mindorks.com/android/store)
 [![Open Source Love](https://badges.frapsoft.com/os/v1/open-source.svg?v=102)](https://opensource.org/licenses/Apache-2.0)
 [![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/LICENSE)
 

From cf4fe664e624a381487ccad3156291e0e9d914d4 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 3 Aug 2018 07:43:12 +0530
Subject: [PATCH 100/137] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 7626ec1..e2b045e 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 
 [![Mindorks](https://img.shields.io/badge/mindorks-opensource-blue.svg)](https://mindorks.com/open-source-projects)
 [![Mindorks Community](https://img.shields.io/badge/join-community-blue.svg)](https://mindorks.com/join-community)
-[![Mindorks Android Store](https://img.shields.io/badge/Mindorks%20Android%20Store-Android%20Debug%20Database-blue.svg?style=flat)](https://mindorks.com/android/store)
+[![Mindorks Android Store](https://img.shields.io/badge/Mindorks%20Android%20Store-RxJava2%20Android%20Samples-blue.svg?style=flat)](https://mindorks.com/android/store)
 [![Open Source Love](https://badges.frapsoft.com/os/v1/open-source.svg?v=102)](https://opensource.org/licenses/Apache-2.0)
 [![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/LICENSE)
 

From a2166168213fbbf19b4bf0f4123029b5bdb8b3f0 Mon Sep 17 00:00:00 2001
From: Bapusaheb Patil <bapoo1998@gmail.com>
Date: Wed, 5 Sep 2018 11:54:26 +0530
Subject: [PATCH 101/137] Migrated to Android X | Updated build scripts

---
 app/build.gradle                              | 24 +++++++++++--------
 .../android/samples/MyApplication.java        |  2 ++
 .../android/samples/ui/OperatorsActivity.java |  2 +-
 .../android/samples/ui/SelectionActivity.java |  2 +-
 .../ComposeOperatorExampleActivity.java       |  2 +-
 .../ui/networking/NetworkingActivity.java     |  2 +-
 .../AsyncSubjectExampleActivity.java          |  2 +-
 .../BehaviorSubjectExampleActivity.java       |  2 +-
 .../ui/operators/BufferExampleActivity.java   |  2 +-
 .../CompletableObserverExampleActivity.java   |  2 +-
 .../ui/operators/ConcatExampleActivity.java   |  2 +-
 .../ui/operators/DebounceExampleActivity.java |  2 +-
 .../ui/operators/DeferExampleActivity.java    |  2 +-
 .../ui/operators/DelayExampleActivity.java    |  2 +-
 .../operators/DisposableExampleActivity.java  |  2 +-
 .../ui/operators/DistinctExampleActivity.java |  4 ++--
 .../ui/operators/FilterExampleActivity.java   |  2 +-
 .../ui/operators/FlowableExampleActivity.java |  2 +-
 .../ui/operators/IntervalExampleActivity.java |  2 +-
 .../LastOperatorExampleActivity.java          |  4 ++--
 .../ui/operators/MapExampleActivity.java      |  2 +-
 .../ui/operators/MergeExampleActivity.java    |  2 +-
 .../PublishSubjectExampleActivity.java        |  2 +-
 .../ui/operators/ReduceExampleActivity.java   |  2 +-
 .../ui/operators/ReplayExampleActivity.java   |  2 +-
 .../ReplaySubjectExampleActivity.java         |  2 +-
 .../ui/operators/ScanExampleActivity.java     |  2 +-
 .../ui/operators/SimpleExampleActivity.java   |  2 +-
 .../SingleObserverExampleActivity.java        |  2 +-
 .../ui/operators/SkipExampleActivity.java     |  2 +-
 .../operators/SwitchMapExampleActivity.java   |  4 ++--
 .../ui/operators/TakeExampleActivity.java     |  2 +-
 .../ThrottleFirstExampleActivity.java         |  2 +-
 .../ThrottleLastExampleActivity.java          |  2 +-
 .../ui/operators/TimerExampleActivity.java    |  2 +-
 .../ui/operators/WindowExampleActivity.java   |  2 +-
 .../ui/operators/ZipExampleActivity.java      |  2 +-
 .../ui/pagination/PaginationActivity.java     |  8 +++----
 .../ui/pagination/PaginationAdapter.java      |  2 +-
 .../samples/ui/rxbus/RxBusActivity.java       |  2 +-
 .../samples/ui/search/SearchActivity.java     |  2 +-
 .../main/res/layout/activity_pagination.xml   |  2 +-
 build.gradle                                  |  4 +++-
 gradle.properties                             |  2 ++
 gradle/wrapper/gradle-wrapper.properties      |  2 +-
 45 files changed, 68 insertions(+), 58 deletions(-)

diff --git a/app/build.gradle b/app/build.gradle
index 62fe87b..128b470 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion "25.0.2"
+    compileSdkVersion 28
+    buildToolsVersion "28.0.2"
 
     defaultConfig {
         applicationId "com.rxjava2.android.samples"
         minSdkVersion 16
-        targetSdkVersion 25
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
     }
@@ -20,11 +20,15 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    testCompile 'junit:junit:4.12'
-    compile 'com.android.support:appcompat-v7:25.1.0'
-    compile 'com.android.support:recyclerview-v7:25.1.0'
-    compile 'io.reactivex.rxjava2:rxjava:2.1.1'
-    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
-    compile 'com.amitshekhar.android:rx2-android-networking:1.0.0'
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    testImplementation 'junit:junit:4.12'
+    implementation 'androidx.appcompat:appcompat:1.0.0-rc02'
+    implementation 'androidx.recyclerview:recyclerview:1.0.0-rc02'
+
+    // RxJava2 Dependencies
+    implementation 'io.reactivex.rxjava2:rxjava:2.2.1'
+    implementation 'io.reactivex.rxjava2:rxandroid:2.1.0'
+
+    // FastAndroidNetworking Dependency
+    implementation 'com.amitshekhar.android:rx2-android-networking:1.0.2'
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/MyApplication.java b/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
index d4df621..4b3b2ab 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
@@ -1,5 +1,6 @@
 package com.rxjava2.android.samples;
 
+import android.annotation.SuppressLint;
 import android.app.Application;
 
 import com.rxjava2.android.samples.model.Events;
@@ -29,6 +30,7 @@ public RxBus bus() {
         return bus;
     }
 
+    @SuppressLint("CheckResult")
     public void sendAutoEvent() {
         Observable.timer(2, TimeUnit.SECONDS)
                 .subscribe(new Consumer<Long>() {
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
index 674d760..5349acf 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
@@ -2,7 +2,7 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.view.View;
 
 import com.rxjava2.android.samples.R;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
index d3c6082..8ec0990 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
@@ -2,7 +2,7 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.view.View;
 
 import com.rxjava2.android.samples.MyApplication;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java
index faf2291..89ab45b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java
@@ -1,10 +1,10 @@
 package com.rxjava2.android.samples.ui.compose;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
 
 import com.rxjava2.android.samples.R;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Flowable;
 import io.reactivex.Observable;
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
index d643ae3..1968f22 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.networking;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.util.Pair;
 import android.view.View;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
index 501bc63..689f2f8 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
index e398fd8..a5c1c7e 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
index ead4b70..c0d7f7a 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
index 1f7451a..00dde7b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
index ce4a3f5..46cd7d7 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
index d0f9802..b7f8a0a 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
index 4aed8c6..c0c17d0 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java
index 2979e75..0b32c16 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java
index 2dd124b..4fe3a86 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java
@@ -2,7 +2,7 @@
 
 import android.os.Bundle;
 import android.os.SystemClock;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
index 8e5f2f6..45ad9e6 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
@@ -1,8 +1,8 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.annotation.Nullable;
-import android.support.v7.app.AppCompatActivity;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java
index e470182..eb08237 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
index 7303cc2..4e53e58 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
index 22469be..d50bcb8 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
index b1c86ff..9833850 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
@@ -1,8 +1,8 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.annotation.Nullable;
-import android.support.v7.app.AppCompatActivity;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
index ccc6ace..6b43a5c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java
index 0cd7487..a42b077 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
index af8822c..a77b39a 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java
index 1ab9930..7c1710a 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
index 8880ea9..4281092 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
index 7f09563..533349c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
index f70e667..6a341fd 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java
index 423047d..be0a740 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
index 6c9ce7c..a756aa2 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
index 26706ea..3b6ba33 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java
index 127d611..9d61c22 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java
@@ -1,8 +1,8 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.annotation.Nullable;
-import android.support.v7.app.AppCompatActivity;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java
index ae71924..3de0560 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
index 941dd4d..390fd54 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
index 95b6a45..31b88de 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java
index 17f6369..0689374 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
index 672d3ce..01facfc 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
@@ -1 +1 @@
-package com.rxjava2.android.samples.ui.operators;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.rxjava2.android.samples.R;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends AppCompatActivity {

    private static final String TAG = WindowExampleActivity.class.getSimpleName();
    Button btn;
    TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_example);
        btn = (Button) findViewById(R.id.btn);
        textView = (TextView) findViewById(R.id.textView);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                doSomeWork();
            }
        });
    }


    /*
     * Example using window operator -> It periodically
     * subdivide items from an Observable into
     * Observable windows and emit these windows rather than
     * emitting the items one at a time
     */
    protected void doSomeWork() {

        Observable.interval(1, TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(getConsumer());
    }

    public Consumer<Observable<Long>> getConsumer() {
        return new Consumer<Observable<Long>>() {
            @Override
            public void accept(Observable<Long> observable) throws Exception {
                Log.d(TAG, "Sub Divide begin....");
                textView.append("Sub Divide begin ....");
                textView.append(AppConstant.LINE_SEPARATOR);
                observable
                        .subscribeOn(Schedulers.io())
                        .observeOn(AndroidSchedulers.mainThread())
                        .subscribe(new Consumer<Long>() {
                            @Override
                            public void accept(Long value) {
                                Log.d(TAG, "Next:" + value);
                                textView.append("Next:" + value);
                                textView.append(AppConstant.LINE_SEPARATOR);
                            }
                        });
            }
        };
    }
}
\ No newline at end of file
+package com.rxjava2.android.samples.ui.operators;

import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.rxjava2.android.samples.R;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends AppCompatActivity {

    private static final String TAG = WindowExampleActivity.class.getSimpleName();
    Button btn;
    TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_example);
        btn = (Button) findViewById(R.id.btn);
        textView = (TextView) findViewById(R.id.textView);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                doSomeWork();
            }
        });
    }


    /*
     * Example using window operator -> It periodically
     * subdivide items from an Observable into
     * Observable windows and emit these windows rather than
     * emitting the items one at a time
     */
    protected void doSomeWork() {

        Observable.interval(1, TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(getConsumer());
    }

    public Consumer<Observable<Long>> getConsumer() {
        return new Consumer<Observable<Long>>() {
            @Override
            public void accept(Observable<Long> observable) throws Exception {
                Log.d(TAG, "Sub Divide begin....");
                textView.append("Sub Divide begin ....");
                textView.append(AppConstant.LINE_SEPARATOR);
                observable
                        .subscribeOn(Schedulers.io())
                        .observeOn(AndroidSchedulers.mainThread())
                        .subscribe(new Consumer<Long>() {
                            @Override
                            public void accept(Long value) {
                                Log.d(TAG, "Next:" + value);
                                textView.append("Next:" + value);
                                textView.append(AppConstant.LINE_SEPARATOR);
                            }
                        });
            }
        };
    }
}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
index af446f3..a45a937 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
index b68b312..eab2a84 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
@@ -1,9 +1,6 @@
 package com.rxjava2.android.samples.ui.pagination;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
 import android.view.View;
 import android.widget.ProgressBar;
 
@@ -15,6 +12,9 @@
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
 import io.reactivex.Flowable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.annotations.NonNull;
@@ -50,7 +50,7 @@ protected void onCreate(Bundle savedInstanceState) {
         recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
         progressBar = (ProgressBar) findViewById(R.id.progressBar);
         layoutManager = new LinearLayoutManager(this);
-        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
+        layoutManager.setOrientation(RecyclerView.VERTICAL);
         recyclerView.setLayoutManager(layoutManager);
         paginationAdapter = new PaginationAdapter();
         recyclerView.setAdapter(paginationAdapter);
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationAdapter.java b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationAdapter.java
index 9c9d162..f9b0e11 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationAdapter.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationAdapter.java
@@ -1,6 +1,6 @@
 package com.rxjava2.android.samples.ui.pagination;
 
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java
index 2911b42..63dcabb 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.rxbus;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java
index 2382286..18d2e4b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples.ui.search;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.widget.SearchView;
 import android.widget.TextView;
 
diff --git a/app/src/main/res/layout/activity_pagination.xml b/app/src/main/res/layout/activity_pagination.xml
index f4a049b..d47a5aa 100644
--- a/app/src/main/res/layout/activity_pagination.xml
+++ b/app/src/main/res/layout/activity_pagination.xml
@@ -5,7 +5,7 @@
     android:layout_height="match_parent"
     android:orientation="vertical">
 
-    <android.support.v7.widget.RecyclerView
+    <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recyclerView"
         android:layout_width="match_parent"
         android:layout_height="0dp"
diff --git a/build.gradle b/build.gradle
index 74b2ab0..fd969ca 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,9 +3,10 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.3'
+        classpath 'com.android.tools.build:gradle:3.2.0-rc02'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -15,6 +16,7 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        google()
     }
 }
 
diff --git a/gradle.properties b/gradle.properties
index aac7c9b..9e6fce1 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -9,6 +9,8 @@
 
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
+android.enableJetifier=true
+android.useAndroidX=true
 org.gradle.jvmargs=-Xmx1536m
 
 # When configured, Gradle will run in incubating parallel mode.
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index ddbfadd..cd03b6a 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10-all.zip

From 838da0d9fb99e1c6fa8ce6b9393c02536061f803 Mon Sep 17 00:00:00 2001
From: Bapusaheb Patil <bapoo1998@gmail.com>
Date: Wed, 5 Sep 2018 14:32:31 +0530
Subject: [PATCH 102/137] Code refactoring | Added AndroidX Espresso

---
 app/build.gradle                              |  3 +++
 .../android/samples/ApplicationTest.java      |  2 +-
 .../android/samples/MyApplication.java        |  4 +---
 .../rxjava2/android/samples/model/Car.java    |  2 +-
 .../android/samples/ui/OperatorsActivity.java |  3 ++-
 .../android/samples/ui/SelectionActivity.java |  3 ++-
 .../ui/networking/NetworkingActivity.java     | 22 +++++++++----------
 .../AsyncSubjectExampleActivity.java          |  6 ++---
 .../BehaviorSubjectExampleActivity.java       |  6 ++---
 .../ui/operators/BufferExampleActivity.java   |  6 ++---
 .../CompletableObserverExampleActivity.java   |  6 ++---
 .../ui/operators/ConcatExampleActivity.java   |  6 ++---
 .../ui/operators/DebounceExampleActivity.java |  6 ++---
 .../ui/operators/DeferExampleActivity.java    |  6 ++---
 .../ui/operators/DelayExampleActivity.java    |  6 ++---
 .../operators/DisposableExampleActivity.java  |  8 +++----
 .../ui/operators/DistinctExampleActivity.java |  8 +++----
 .../ui/operators/FilterExampleActivity.java   |  8 +++----
 .../ui/operators/FlowableExampleActivity.java |  6 ++---
 .../ui/operators/IntervalExampleActivity.java |  6 ++---
 .../LastOperatorExampleActivity.java          |  8 +++----
 .../ui/operators/MapExampleActivity.java      | 10 ++++-----
 .../ui/operators/MergeExampleActivity.java    |  6 ++---
 .../PublishSubjectExampleActivity.java        |  6 ++---
 .../ui/operators/ReduceExampleActivity.java   |  6 ++---
 .../ui/operators/ReplayExampleActivity.java   |  6 ++---
 .../ReplaySubjectExampleActivity.java         |  6 ++---
 .../ui/operators/ScanExampleActivity.java     |  8 +++----
 .../ui/operators/SimpleExampleActivity.java   |  6 ++---
 .../SingleObserverExampleActivity.java        |  6 ++---
 .../ui/operators/SkipExampleActivity.java     |  6 ++---
 .../operators/SwitchMapExampleActivity.java   |  8 +++----
 .../ui/operators/TakeExampleActivity.java     |  6 ++---
 .../ThrottleFirstExampleActivity.java         |  6 ++---
 .../ThrottleLastExampleActivity.java          |  6 ++---
 .../ui/operators/TimerExampleActivity.java    |  6 ++---
 .../ui/operators/WindowExampleActivity.java   |  2 +-
 .../ui/operators/ZipExampleActivity.java      | 12 +++++-----
 .../ui/pagination/PaginationActivity.java     | 10 ++++-----
 .../ui/pagination/PaginationAdapter.java      |  3 ++-
 .../samples/ui/rxbus/RxBusActivity.java       |  8 +++----
 .../samples/ui/search/SearchActivity.java     | 14 ++++++------
 .../android/samples/ExampleUnitTest.java      |  4 ++--
 43 files changed, 143 insertions(+), 139 deletions(-)

diff --git a/app/build.gradle b/app/build.gradle
index 128b470..019375b 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -22,6 +22,9 @@ android {
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-alpha4'
+    androidTestImplementation 'androidx.test:runner:1.1.0-alpha4'
+    androidTestImplementation 'androidx.test:rules:1.1.0-alpha4'
     implementation 'androidx.appcompat:appcompat:1.0.0-rc02'
     implementation 'androidx.recyclerview:recyclerview:1.0.0-rc02'
 
diff --git a/app/src/androidTest/java/com/rxjava2/android/samples/ApplicationTest.java b/app/src/androidTest/java/com/rxjava2/android/samples/ApplicationTest.java
index ddaec0b..1802a5d 100644
--- a/app/src/androidTest/java/com/rxjava2/android/samples/ApplicationTest.java
+++ b/app/src/androidTest/java/com/rxjava2/android/samples/ApplicationTest.java
@@ -1,7 +1,7 @@
 package com.rxjava2.android.samples;
 
 import android.app.Application;
-import android.test.ApplicationTestCase;
+import androidx.test.*;
 
 /**
  * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
diff --git a/app/src/main/java/com/rxjava2/android/samples/MyApplication.java b/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
index 4b3b2ab..781cb30 100644
--- a/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
+++ b/app/src/main/java/com/rxjava2/android/samples/MyApplication.java
@@ -1,6 +1,5 @@
 package com.rxjava2.android.samples;
 
-import android.annotation.SuppressLint;
 import android.app.Application;
 
 import com.rxjava2.android.samples.model.Events;
@@ -30,12 +29,11 @@ public RxBus bus() {
         return bus;
     }
 
-    @SuppressLint("CheckResult")
     public void sendAutoEvent() {
         Observable.timer(2, TimeUnit.SECONDS)
                 .subscribe(new Consumer<Long>() {
                     @Override
-                    public void accept(Long aLong) throws Exception {
+                    public void accept(Long aLong) {
                         bus.send(new Events.AutoEvent());
                     }
                 });
diff --git a/app/src/main/java/com/rxjava2/android/samples/model/Car.java b/app/src/main/java/com/rxjava2/android/samples/model/Car.java
index e223650..a5ecffa 100644
--- a/app/src/main/java/com/rxjava2/android/samples/model/Car.java
+++ b/app/src/main/java/com/rxjava2/android/samples/model/Car.java
@@ -19,7 +19,7 @@ public void setBrand(String brand) {
     public Observable<String> brandDeferObservable() {
         return Observable.defer(new Callable<ObservableSource<? extends String>>() {
             @Override
-            public ObservableSource<? extends String> call() throws Exception {
+            public ObservableSource<? extends String> call() {
                 return Observable.just(brand);
             }
         });
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
index 5349acf..0316ad0 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
@@ -2,7 +2,6 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.view.View;
 
 import com.rxjava2.android.samples.R;
@@ -38,6 +37,8 @@
 import com.rxjava2.android.samples.ui.operators.WindowExampleActivity;
 import com.rxjava2.android.samples.ui.operators.ZipExampleActivity;
 
+import androidx.appcompat.app.AppCompatActivity;
+
 public class OperatorsActivity extends AppCompatActivity {
 
     @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
index 8ec0990..e0d6ad5 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
@@ -2,7 +2,6 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.view.View;
 
 import com.rxjava2.android.samples.MyApplication;
@@ -13,6 +12,8 @@
 import com.rxjava2.android.samples.ui.rxbus.RxBusActivity;
 import com.rxjava2.android.samples.ui.search.SearchActivity;
 
+import androidx.appcompat.app.AppCompatActivity;
+
 public class SelectionActivity extends AppCompatActivity {
 
     @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
index 1968f22..a425a96 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.networking;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.util.Pair;
 import android.view.View;
@@ -16,6 +15,7 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.ObservableSource;
 import io.reactivex.Observer;
@@ -52,7 +52,7 @@ public void map(View view) {
                 .observeOn(AndroidSchedulers.mainThread())
                 .map(new Function<ApiUser, User>() {
                     @Override
-                    public User apply(ApiUser apiUser) throws Exception {
+                    public User apply(ApiUser apiUser) {
                         // here we get ApiUser from server
                         User user = new User(apiUser);
                         // then by converting, we are returning user
@@ -115,7 +115,7 @@ private void findUsersWhoLovesBoth() {
         Observable.zip(getCricketFansObservable(), getFootballFansObservable(),
                 new BiFunction<List<User>, List<User>, List<User>>() {
                     @Override
-                    public List<User> apply(List<User> cricketFans, List<User> footballFans) throws Exception {
+                    public List<User> apply(List<User> cricketFans, List<User> footballFans) {
                         List<User> userWhoLovesBoth =
                                 filterUserWhoLovesBoth(cricketFans, footballFans);
                         return userWhoLovesBoth;
@@ -183,13 +183,13 @@ public void flatMapAndFilter(View view) {
         getAllMyFriendsObservable()
                 .flatMap(new Function<List<User>, ObservableSource<User>>() { // flatMap - to return users one by one
                     @Override
-                    public ObservableSource<User> apply(List<User> usersList) throws Exception {
+                    public ObservableSource<User> apply(List<User> usersList) {
                         return Observable.fromIterable(usersList); // returning user one by one from usersList.
                     }
                 })
                 .filter(new Predicate<User>() {
                     @Override
-                    public boolean test(User user) throws Exception {
+                    public boolean test(User user) {
                         // filtering user who follows me.
                         return user.isFollowing;
                     }
@@ -229,7 +229,7 @@ public void take(View view) {
         getUserListObservable()
                 .flatMap(new Function<List<User>, ObservableSource<User>>() { // flatMap - to return users one by one
                     @Override
-                    public ObservableSource<User> apply(List<User> usersList) throws Exception {
+                    public ObservableSource<User> apply(List<User> usersList) {
                         return Observable.fromIterable(usersList); // returning user one by one from usersList.
                     }
                 })
@@ -269,13 +269,13 @@ public void flatMap(View view) {
         getUserListObservable()
                 .flatMap(new Function<List<User>, ObservableSource<User>>() { // flatMap - to return users one by one
                     @Override
-                    public ObservableSource<User> apply(List<User> usersList) throws Exception {
+                    public ObservableSource<User> apply(List<User> usersList) {
                         return Observable.fromIterable(usersList); // returning user one by one from usersList.
                     }
                 })
                 .flatMap(new Function<User, ObservableSource<UserDetail>>() {
                     @Override
-                    public ObservableSource<UserDetail> apply(User user) throws Exception {
+                    public ObservableSource<UserDetail> apply(User user) {
                         // here we get the user one by one
                         // and returns corresponding getUserDetailObservable
                         // for that userId
@@ -331,13 +331,13 @@ public void flatMapWithZip(View view) {
         getUserListObservable()
                 .flatMap(new Function<List<User>, ObservableSource<User>>() { // flatMap - to return users one by one
                     @Override
-                    public ObservableSource<User> apply(List<User> usersList) throws Exception {
+                    public ObservableSource<User> apply(List<User> usersList) {
                         return Observable.fromIterable(usersList); // returning user one by one from usersList.
                     }
                 })
                 .flatMap(new Function<User, ObservableSource<Pair<UserDetail, User>>>() {
                     @Override
-                    public ObservableSource<Pair<UserDetail, User>> apply(User user) throws Exception {
+                    public ObservableSource<Pair<UserDetail, User>> apply(User user) {
                         // here we get the user one by one and then we are zipping
                         // two observable - one getUserDetailObservable (network call to get userDetail)
                         // and another Observable.just(user) - just to emit user
@@ -345,7 +345,7 @@ public ObservableSource<Pair<UserDetail, User>> apply(User user) throws Exceptio
                                 Observable.just(user),
                                 new BiFunction<UserDetail, User, Pair<UserDetail, User>>() {
                                     @Override
-                                    public Pair<UserDetail, User> apply(UserDetail userDetail, User user) throws Exception {
+                                    public Pair<UserDetail, User> apply(UserDetail userDetail, User user) {
                                         // runs when network call completes
                                         // we get here userDetail for the corresponding user
                                         return new Pair<>(userDetail, user); // returning the pair(userDetail, user)
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
index 689f2f8..d2243a2 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/AsyncSubjectExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observer;
 import io.reactivex.disposables.Disposable;
 import io.reactivex.subjects.AsyncSubject;
@@ -28,8 +28,8 @@ public class AsyncSubjectExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
index a5c1c7e..9eeadd0 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BehaviorSubjectExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observer;
 import io.reactivex.disposables.Disposable;
 import io.reactivex.subjects.BehaviorSubject;
@@ -28,8 +28,8 @@ public class BehaviorSubjectExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
index c0d7f7a..9171136 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -12,6 +11,7 @@
 
 import java.util.List;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.disposables.Disposable;
@@ -29,8 +29,8 @@ public class BufferExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
index 00dde7b..4ee612f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -12,6 +11,7 @@
 
 import java.util.concurrent.TimeUnit;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Completable;
 import io.reactivex.CompletableObserver;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -31,8 +31,8 @@ public class CompletableObserverExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
index 46cd7d7..8bb3e2b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.disposables.Disposable;
@@ -27,8 +27,8 @@ public class ConcatExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
index b7f8a0a..7837381 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DebounceExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -12,6 +11,7 @@
 
 import java.util.concurrent.TimeUnit;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
@@ -34,8 +34,8 @@ public class DebounceExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
index c0c17d0..0e6249c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -11,6 +10,7 @@
 import com.rxjava2.android.samples.model.Car;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.disposables.Disposable;
@@ -28,8 +28,8 @@ public class DeferExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java
index 0b32c16..212092c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DelayExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -12,6 +11,7 @@
 
 import java.util.concurrent.TimeUnit;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -32,8 +32,8 @@ public class DelayExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java
index 4fe3a86..9e51b3c 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java
@@ -2,7 +2,6 @@
 
 import android.os.Bundle;
 import android.os.SystemClock;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -13,6 +12,7 @@
 
 import java.util.concurrent.Callable;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.ObservableSource;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -34,8 +34,8 @@ public class DisposableExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -88,7 +88,7 @@ public void onNext(String value) {
     static Observable<String> sampleObservable() {
         return Observable.defer(new Callable<ObservableSource<? extends String>>() {
             @Override
-            public ObservableSource<? extends String> call() throws Exception {
+            public ObservableSource<? extends String> call() {
                 // Do some long running operation
                 SystemClock.sleep(2000);
                 return Observable.just("one", "two", "three", "four", "five");
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
index 45ad9e6..af2c0e3 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/DistinctExampleActivity.java
@@ -1,8 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -11,6 +9,8 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.disposables.Disposable;
@@ -28,8 +28,8 @@ public class DistinctExampleActivity extends AppCompatActivity {
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java
index eb08237..35ddf9a 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.disposables.Disposable;
@@ -29,8 +29,8 @@ public class FilterExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -48,7 +48,7 @@ private void doSomeWork() {
         Observable.just(1, 2, 3, 4, 5, 6)
                 .filter(new Predicate<Integer>() {
                     @Override
-                    public boolean test(Integer integer) throws Exception {
+                    public boolean test(Integer integer) {
                         return integer % 2 == 0;
                     }
                 })
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
index 4e53e58..2bf727f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Flowable;
 import io.reactivex.SingleObserver;
 import io.reactivex.disposables.Disposable;
@@ -28,8 +28,8 @@ public class FlowableExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
index d50bcb8..36baeaf 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -12,6 +11,7 @@
 
 import java.util.concurrent.TimeUnit;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.CompositeDisposable;
@@ -32,8 +32,8 @@ public class IntervalExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
index 9833850..5cc3087 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/LastOperatorExampleActivity.java
@@ -1,8 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -11,6 +9,8 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.SingleObserver;
 import io.reactivex.disposables.Disposable;
@@ -29,8 +29,8 @@ public class LastOperatorExampleActivity extends AppCompatActivity {
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
index 6b43a5c..29794ca 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -15,6 +14,7 @@
 
 import java.util.List;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
@@ -37,8 +37,8 @@ public class MapExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -63,7 +63,7 @@ private void doSomeWork() {
                 .map(new Function<List<ApiUser>, List<User>>() {
 
                     @Override
-                    public List<User> apply(List<ApiUser> apiUsers) throws Exception {
+                    public List<User> apply(List<ApiUser> apiUsers) {
                         return Utils.convertApiUserListToUserList(apiUsers);
                     }
                 })
@@ -73,7 +73,7 @@ public List<User> apply(List<ApiUser> apiUsers) throws Exception {
     private Observable<List<ApiUser>> getObservable() {
         return Observable.create(new ObservableOnSubscribe<List<ApiUser>>() {
             @Override
-            public void subscribe(ObservableEmitter<List<ApiUser>> e) throws Exception {
+            public void subscribe(ObservableEmitter<List<ApiUser>> e) {
                 if (!e.isDisposed()) {
                     e.onNext(Utils.getApiUserList());
                     e.onComplete();
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java
index a42b077..01551bf 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.disposables.Disposable;
@@ -27,8 +27,8 @@ public class MergeExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
index a77b39a..d03266b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observer;
 import io.reactivex.disposables.Disposable;
 import io.reactivex.subjects.PublishSubject;
@@ -28,8 +28,8 @@ public class PublishSubjectExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java
index 7c1710a..aa8aec1 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.MaybeObserver;
 import io.reactivex.Observable;
 import io.reactivex.disposables.Disposable;
@@ -28,8 +28,8 @@ public class ReduceExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
index 4281092..c1ce888 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observer;
 import io.reactivex.disposables.Disposable;
 import io.reactivex.observables.ConnectableObservable;
@@ -28,8 +28,8 @@ public class ReplayExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
index 533349c..34bb5e4 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplaySubjectExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observer;
 import io.reactivex.disposables.Disposable;
 import io.reactivex.subjects.ReplaySubject;
@@ -28,8 +28,8 @@ public class ReplaySubjectExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
index 6a341fd..0c263c2 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ScanExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -27,8 +27,8 @@ public class ScanExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -47,7 +47,7 @@ private void doSomeWork() {
                 .observeOn(AndroidSchedulers.mainThread())
                 .scan(new BiFunction<Integer, Integer, Integer>() {
                     @Override
-                    public Integer apply(Integer int1, Integer int2) throws Exception {
+                    public Integer apply(Integer int1, Integer int2) {
                         return int1 + int2;
                     }
                 })
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java
index be0a740..6329b1b 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SimpleExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -29,8 +29,8 @@ public class SimpleExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
index a756aa2..403f070 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Single;
 import io.reactivex.SingleObserver;
 import io.reactivex.disposables.Disposable;
@@ -27,8 +27,8 @@ public class SingleObserverExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
index 3b6ba33..06ad8eb 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -29,8 +29,8 @@ public class SkipExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java
index 9d61c22..d787bc5 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java
@@ -1,8 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -14,6 +12,8 @@
 import java.util.Random;
 import java.util.concurrent.TimeUnit;
 
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.ObservableSource;
 import io.reactivex.Observer;
@@ -36,8 +36,8 @@ protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
 
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java
index 3de0560..74b4b9f 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -29,8 +29,8 @@ public class TakeExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
index 390fd54..a009cc1 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleFirstExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -12,6 +11,7 @@
 
 import java.util.concurrent.TimeUnit;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
@@ -35,8 +35,8 @@ public class ThrottleFirstExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
index 31b88de..b48e208 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ThrottleLastExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -12,6 +11,7 @@
 
 import java.util.concurrent.TimeUnit;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
@@ -34,8 +34,8 @@ public class ThrottleLastExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java
index 0689374..cbfa1e1 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TimerExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -12,6 +11,7 @@
 
 import java.util.concurrent.TimeUnit;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -31,8 +31,8 @@ public class TimerExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
index 01facfc..db2ed70 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
@@ -1 +1 @@
-package com.rxjava2.android.samples.ui.operators;

import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.rxjava2.android.samples.R;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends AppCompatActivity {

    private static final String TAG = WindowExampleActivity.class.getSimpleName();
    Button btn;
    TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_example);
        btn = (Button) findViewById(R.id.btn);
        textView = (TextView) findViewById(R.id.textView);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                doSomeWork();
            }
        });
    }


    /*
     * Example using window operator -> It periodically
     * subdivide items from an Observable into
     * Observable windows and emit these windows rather than
     * emitting the items one at a time
     */
    protected void doSomeWork() {

        Observable.interval(1, TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(getConsumer());
    }

    public Consumer<Observable<Long>> getConsumer() {
        return new Consumer<Observable<Long>>() {
            @Override
            public void accept(Observable<Long> observable) throws Exception {
                Log.d(TAG, "Sub Divide begin....");
                textView.append("Sub Divide begin ....");
                textView.append(AppConstant.LINE_SEPARATOR);
                observable
                        .subscribeOn(Schedulers.io())
                        .observeOn(AndroidSchedulers.mainThread())
                        .subscribe(new Consumer<Long>() {
                            @Override
                            public void accept(Long value) {
                                Log.d(TAG, "Next:" + value);
                                textView.append("Next:" + value);
                                textView.append(AppConstant.LINE_SEPARATOR);
                            }
                        });
            }
        };
    }
}
\ No newline at end of file
+package com.rxjava2.android.samples.ui.operators;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.rxjava2.android.samples.R;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import androidx.appcompat.app.AppCompatActivity;
import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends AppCompatActivity {

    private static final String TAG = WindowExampleActivity.class.getSimpleName();
    Button btn;
    TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_example);
        btn = findViewById(R.id.btn);
        textView = findViewById(R.id.textView);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                doSomeWork();
            }
        });
    }


    /*
     * Example using window operator -> It periodically
     * subdivide items from an Observable into
     * Observable windows and emit these windows rather than
     * emitting the items one at a time
     */
    protected void doSomeWork() {

        Observable.interval(1, TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(getConsumer());
    }

    public Consumer<Observable<Long>> getConsumer() {
        return new Consumer<Observable<Long>>() {
            @Override
            public void accept(Observable<Long> observable) {
                Log.d(TAG, "Sub Divide begin....");
                textView.append("Sub Divide begin ....");
                textView.append(AppConstant.LINE_SEPARATOR);
                observable
                        .subscribeOn(Schedulers.io())
                        .observeOn(AndroidSchedulers.mainThread())
                        .subscribe(new Consumer<Long>() {
                            @Override
                            public void accept(Long value) {
                                Log.d(TAG, "Next:" + value);
                                textView.append("Next:" + value);
                                textView.append(AppConstant.LINE_SEPARATOR);
                            }
                        });
            }
        };
    }
}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
index a45a937..18c97f3 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.operators;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -14,6 +13,7 @@
 
 import java.util.List;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
@@ -36,8 +36,8 @@ public class ZipExampleActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_example);
-        btn = (Button) findViewById(R.id.btn);
-        textView = (TextView) findViewById(R.id.textView);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
 
         btn.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -57,7 +57,7 @@ private void doSomeWork() {
         Observable.zip(getCricketFansObservable(), getFootballFansObservable(),
                 new BiFunction<List<User>, List<User>, List<User>>() {
                     @Override
-                    public List<User> apply(List<User> cricketFans, List<User> footballFans) throws Exception {
+                    public List<User> apply(List<User> cricketFans, List<User> footballFans) {
                         return Utils.filterUserWhoLovesBoth(cricketFans, footballFans);
                     }
                 })
@@ -71,7 +71,7 @@ public List<User> apply(List<User> cricketFans, List<User> footballFans) throws
     private Observable<List<User>> getCricketFansObservable() {
         return Observable.create(new ObservableOnSubscribe<List<User>>() {
             @Override
-            public void subscribe(ObservableEmitter<List<User>> e) throws Exception {
+            public void subscribe(ObservableEmitter<List<User>> e) {
                 if (!e.isDisposed()) {
                     e.onNext(Utils.getUserListWhoLovesCricket());
                     e.onComplete();
@@ -83,7 +83,7 @@ public void subscribe(ObservableEmitter<List<User>> e) throws Exception {
     private Observable<List<User>> getFootballFansObservable() {
         return Observable.create(new ObservableOnSubscribe<List<User>>() {
             @Override
-            public void subscribe(ObservableEmitter<List<User>> e) throws Exception {
+            public void subscribe(ObservableEmitter<List<User>> e) {
                 if (!e.isDisposed()) {
                     e.onNext(Utils.getUserListWhoLovesFootball());
                     e.onComplete();
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
index eab2a84..2cca2d7 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
@@ -47,8 +47,8 @@ public class PaginationActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_pagination);
-        recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
-        progressBar = (ProgressBar) findViewById(R.id.progressBar);
+        recyclerView = findViewById(R.id.recyclerView);
+        progressBar = findViewById(R.id.progressBar);
         layoutManager = new LinearLayoutManager(this);
         layoutManager.setOrientation(RecyclerView.VERTICAL);
         recyclerView.setLayoutManager(layoutManager);
@@ -96,7 +96,7 @@ private void subscribeForData() {
                 .onBackpressureDrop()
                 .concatMap(new Function<Integer, Publisher<List<String>>>() {
                     @Override
-                    public Publisher<List<String>> apply(@NonNull Integer page) throws Exception {
+                    public Publisher<List<String>> apply(@NonNull Integer page) {
                         loading = true;
                         progressBar.setVisibility(View.VISIBLE);
                         return dataFromNetwork(page);
@@ -105,7 +105,7 @@ public Publisher<List<String>> apply(@NonNull Integer page) throws Exception {
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Consumer<List<String>>() {
                     @Override
-                    public void accept(@NonNull List<String> items) throws Exception {
+                    public void accept(@NonNull List<String> items) {
                         paginationAdapter.addItems(items);
                         paginationAdapter.notifyDataSetChanged();
                         loading = false;
@@ -127,7 +127,7 @@ private Flowable<List<String>> dataFromNetwork(final int page) {
                 .delay(2, TimeUnit.SECONDS)
                 .map(new Function<Boolean, List<String>>() {
                     @Override
-                    public List<String> apply(@NonNull Boolean value) throws Exception {
+                    public List<String> apply(@NonNull Boolean value) {
                         List<String> items = new ArrayList<>();
                         for (int i = 1; i <= 10; i++) {
                             items.add("Item " + (page * 10 + i));
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationAdapter.java b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationAdapter.java
index f9b0e11..ddc0402 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationAdapter.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationAdapter.java
@@ -1,6 +1,5 @@
 package com.rxjava2.android.samples.ui.pagination;
 
-import androidx.recyclerview.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -11,6 +10,8 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import androidx.recyclerview.widget.RecyclerView;
+
 /**
  * Created by amitshekhar on 15/03/17.
  */
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java
index 63dcabb..a991e5e 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.rxbus;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;
@@ -10,6 +9,7 @@
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.model.Events;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.CompositeDisposable;
 import io.reactivex.functions.Consumer;
@@ -36,8 +36,8 @@ protected void onDestroy() {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_rxbus);
-        textView = (TextView) findViewById(R.id.textView);
-        button = (Button) findViewById(R.id.button);
+        textView = findViewById(R.id.textView);
+        button = findViewById(R.id.button);
 
         disposables.add(((MyApplication) getApplication())
                 .bus()
@@ -46,7 +46,7 @@ protected void onCreate(Bundle savedInstanceState) {
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Consumer<Object>() {
                     @Override
-                    public void accept(Object object) throws Exception {
+                    public void accept(Object object) {
                         if (object instanceof Events.AutoEvent) {
                             textView.setText("Auto Event Received");
                         } else if (object instanceof Events.TapEvent) {
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java
index 18d2e4b..9086b01 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.search;
 
 import android.os.Bundle;
-import androidx.appcompat.app.AppCompatActivity;
 import android.widget.SearchView;
 import android.widget.TextView;
 
@@ -9,6 +8,7 @@
 
 import java.util.concurrent.TimeUnit;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.ObservableSource;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -32,8 +32,8 @@ public class SearchActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_search);
-        searchView = (SearchView) findViewById(R.id.searchView);
-        textViewResult = (TextView) findViewById(R.id.textViewResult);
+        searchView = findViewById(R.id.searchView);
+        textViewResult = findViewById(R.id.textViewResult);
 
         setUpSearchObservable();
     }
@@ -43,7 +43,7 @@ private void setUpSearchObservable() {
                 .debounce(300, TimeUnit.MILLISECONDS)
                 .filter(new Predicate<String>() {
                     @Override
-                    public boolean test(String text) throws Exception {
+                    public boolean test(String text) {
                         if (text.isEmpty()) {
                             textViewResult.setText("");
                             return false;
@@ -55,7 +55,7 @@ public boolean test(String text) throws Exception {
                 .distinctUntilChanged()
                 .switchMap(new Function<String, ObservableSource<String>>() {
                     @Override
-                    public ObservableSource<String> apply(String query) throws Exception {
+                    public ObservableSource<String> apply(String query) {
                         return dataFromNetwork(query);
                     }
                 })
@@ -63,7 +63,7 @@ public ObservableSource<String> apply(String query) throws Exception {
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Consumer<String>() {
                     @Override
-                    public void accept(String result) throws Exception {
+                    public void accept(String result) {
                         textViewResult.setText(result);
                     }
                 });
@@ -77,7 +77,7 @@ private Observable<String> dataFromNetwork(final String query) {
                 .delay(2, TimeUnit.SECONDS)
                 .map(new Function<Boolean, String>() {
                     @Override
-                    public String apply(@NonNull Boolean value) throws Exception {
+                    public String apply(@NonNull Boolean value) {
                         return query;
                     }
                 });
diff --git a/app/src/test/java/com/rxjava2/android/samples/ExampleUnitTest.java b/app/src/test/java/com/rxjava2/android/samples/ExampleUnitTest.java
index 02c64d9..ae10866 100644
--- a/app/src/test/java/com/rxjava2/android/samples/ExampleUnitTest.java
+++ b/app/src/test/java/com/rxjava2/android/samples/ExampleUnitTest.java
@@ -2,14 +2,14 @@
 
 import org.junit.Test;
 
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertEquals;
 
 /**
  * To work on unit tests, switch the Test Artifact in the Build Variants view.
  */
 public class ExampleUnitTest {
     @Test
-    public void addition_isCorrect() throws Exception {
+    public void addition_isCorrect() {
         assertEquals(4, 2 + 2);
     }
 }
\ No newline at end of file

From ffaaa2f98fb923d936945b636d1101526d7d3c97 Mon Sep 17 00:00:00 2001
From: Bapusaheb Patil <bapoo1998@gmail.com>
Date: Wed, 5 Sep 2018 14:36:41 +0530
Subject: [PATCH 103/137] Removed ApplicationTest.java because
 ApplicationTestCase is deprecated

---
 .../rxjava2/android/samples/ApplicationTest.java    | 13 -------------
 1 file changed, 13 deletions(-)
 delete mode 100644 app/src/androidTest/java/com/rxjava2/android/samples/ApplicationTest.java

diff --git a/app/src/androidTest/java/com/rxjava2/android/samples/ApplicationTest.java b/app/src/androidTest/java/com/rxjava2/android/samples/ApplicationTest.java
deleted file mode 100644
index 1802a5d..0000000
--- a/app/src/androidTest/java/com/rxjava2/android/samples/ApplicationTest.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.rxjava2.android.samples;
-
-import android.app.Application;
-import androidx.test.*;
-
-/**
- * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
- */
-public class ApplicationTest extends ApplicationTestCase<Application> {
-    public ApplicationTest() {
-        super(Application.class);
-    }
-}
\ No newline at end of file

From e99bec084977b4118eb64320a4831f9c0cb1ff66 Mon Sep 17 00:00:00 2001
From: WeRockStar <kotchaphan.m@gmail.com>
Date: Thu, 4 Oct 2018 21:20:23 +0700
Subject: [PATCH 104/137] Update gradle plugin

---
 build.gradle | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build.gradle b/build.gradle
index fd969ca..f6f90b2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.0-rc02'
+        classpath 'com.android.tools.build:gradle:3.2.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

From eb95eb32e7fd9cd03b3dcd800f51934b9391316d Mon Sep 17 00:00:00 2001
From: WeRockStar <kotchaphan.m@gmail.com>
Date: Thu, 4 Oct 2018 21:22:20 +0700
Subject: [PATCH 105/137] Update RxJava and README.md

---
 README.md        | 4 ++--
 app/build.gradle | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index e2b045e..1e1d05a 100644
--- a/README.md
+++ b/README.md
@@ -35,11 +35,11 @@ Users switching from 1.x to 2.x have to re-organize their imports, but carefully
 
 Add this in your build.gradle
 ```groovy
-compile 'io.reactivex.rxjava2:rxjava:2.1.1'
+compile 'io.reactivex.rxjava2:rxjava:2.2.2'
 ```
 If you are using RxAndroid also, then add the following
 ```groovy
-compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
+compile 'io.reactivex.rxjava2:rxandroid:2.1.0'
 ```
 
 # RxJava 2 Examples present in this sample project
diff --git a/app/build.gradle b/app/build.gradle
index 019375b..9c98181 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -29,7 +29,7 @@ dependencies {
     implementation 'androidx.recyclerview:recyclerview:1.0.0-rc02'
 
     // RxJava2 Dependencies
-    implementation 'io.reactivex.rxjava2:rxjava:2.2.1'
+    implementation 'io.reactivex.rxjava2:rxjava:2.2.2'
     implementation 'io.reactivex.rxjava2:rxandroid:2.1.0'
 
     // FastAndroidNetworking Dependency

From 1c5d1418cea505861fb7132a9a1f5accd510ca4e Mon Sep 17 00:00:00 2001
From: Mohammed Rampurawala <mohom.007@gmai.com>
Date: Wed, 5 Dec 2018 22:51:36 +0530
Subject: [PATCH 106/137] - Upgraded to Java 1.8 to support lambdas. - Added
 TakeWhile operator. - ObserverAdapter added to override only those methods
 needed from Observer.

---
 app/build.gradle                              |  4 +
 app/src/main/AndroidManifest.xml              |  3 +
 .../android/samples/ui/OperatorsActivity.java |  5 +
 .../operators/TakeWhileExampleActivity.java   | 93 +++++++++++++++++++
 .../samples/utils/ObserverAdapter.java        | 31 +++++++
 .../rxjava2/android/samples/utils/Utils.java  |  5 +
 .../main/res/layout/activity_operators.xml    | 11 ++-
 app/src/main/res/values/strings.xml           |  1 +
 8 files changed, 151 insertions(+), 2 deletions(-)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeWhileExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/utils/ObserverAdapter.java

diff --git a/app/build.gradle b/app/build.gradle
index 9c98181..fe13a5b 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -17,6 +17,10 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+    compileOptions {
+        sourceCompatibility = '1.8'
+        targetCompatibility = '1.8'
+    }
 }
 
 dependencies {
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index ec63671..a737733 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -128,6 +128,9 @@
             android:label="@string/compose" />
         <activity android:name=".ui.operators.SwitchMapExampleActivity"
             android:label="@string/switch_map" />
+
+        <activity android:name=".ui.operators.TakeWhileExampleActivity"
+            android:label="@string/take_while"/>
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
index 0316ad0..4e99dc9 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
@@ -31,6 +31,7 @@
 import com.rxjava2.android.samples.ui.operators.SkipExampleActivity;
 import com.rxjava2.android.samples.ui.operators.SwitchMapExampleActivity;
 import com.rxjava2.android.samples.ui.operators.TakeExampleActivity;
+import com.rxjava2.android.samples.ui.operators.TakeWhileExampleActivity;
 import com.rxjava2.android.samples.ui.operators.ThrottleFirstExampleActivity;
 import com.rxjava2.android.samples.ui.operators.ThrottleLastExampleActivity;
 import com.rxjava2.android.samples.ui.operators.TimerExampleActivity;
@@ -170,4 +171,8 @@ public void startDelayActivity(View view) {
     public void startSwitchMapActivity(View view) {
         startActivity(new Intent(OperatorsActivity.this, SwitchMapExampleActivity.class));
     }
+
+    public void startTakeWhileActivity(View view) {
+        startActivity(new Intent(OperatorsActivity.this, TakeWhileExampleActivity.class));
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeWhileExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeWhileExampleActivity.java
new file mode 100644
index 0000000..6ca1450
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeWhileExampleActivity.java
@@ -0,0 +1,93 @@
+package com.rxjava2.android.samples.ui.operators;
+
+import android.os.Bundle;
+import android.util.Log;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+import com.rxjava2.android.samples.utils.ObserverAdapter;
+
+import java.util.concurrent.TimeUnit;
+
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.functions.BiFunction;
+import io.reactivex.functions.Predicate;
+
+public class TakeWhileExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = TakeWhileExampleActivity.class.getSimpleName();
+
+    private Button btn;
+
+    private TextView textView;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
+
+        btn.setOnClickListener(view -> {
+            doSomeWork();
+        });
+    }
+
+    private void doSomeWork() {
+        getStringObservable()
+                //Delay item emission by one second
+                .zipWith(Observable.interval(0, 1, TimeUnit.SECONDS), new BiFunction<String, Long, String>() {
+                    @Override
+                    public String apply(String s, Long aLong) throws Exception {
+                        return s;
+                    }
+                })
+                //Take the items until the condition is met.
+                .takeWhile(new Predicate<String>() {
+                    @Override
+                    public boolean test(String s) throws Exception {
+                        return !s.toLowerCase().contains("honey");
+                    }
+                })
+                //We need to observe on MainThread because delay works on background thread to avoid UI blocking.
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getObserver());
+    }
+
+    private Observer<? super String> getObserver() {
+        return new ObserverAdapter<String>() {
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(String value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext value : " + value);
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
+    private Observable<String> getStringObservable() {
+        return Observable.just("Alpha", "Beta", "Cupcake", "Doughnut", "Eclair", "Froyo", "GingerBread",
+                "Honeycomb", "Ice cream sandwich");
+    }
+
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/utils/ObserverAdapter.java b/app/src/main/java/com/rxjava2/android/samples/utils/ObserverAdapter.java
new file mode 100644
index 0000000..546084a
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/utils/ObserverAdapter.java
@@ -0,0 +1,31 @@
+package com.rxjava2.android.samples.utils;
+
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
+
+/**
+ * Adapter class for Observer to get the method only needed by the user. Instead of overriding each and every method.
+ *
+ * @param <T>
+ */
+public abstract class ObserverAdapter<T> implements Observer<T> {
+    @Override
+    public void onSubscribe(Disposable d) {
+
+    }
+
+    @Override
+    public void onNext(T s) {
+
+    }
+
+    @Override
+    public void onError(Throwable e) {
+
+    }
+
+    @Override
+    public void onComplete() {
+
+    }
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java b/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
index 04695b2..c0d7076 100644
--- a/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
+++ b/app/src/main/java/com/rxjava2/android/samples/utils/Utils.java
@@ -76,6 +76,11 @@ public static List<User> convertApiUserListToUserList(List<ApiUser> apiUserList)
         return userList;
     }
 
+    public static List<ApiUser> convertApiUserListToApiUserList(List<ApiUser> apiUserList) {
+      return apiUserList;
+    }
+
+
     public static List<User> getUserListWhoLovesCricket() {
 
         List<User> userList = new ArrayList<>();
diff --git a/app/src/main/res/layout/activity_operators.xml b/app/src/main/res/layout/activity_operators.xml
index 7a3c41c..13a39b8 100644
--- a/app/src/main/res/layout/activity_operators.xml
+++ b/app/src/main/res/layout/activity_operators.xml
@@ -4,10 +4,10 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:fadeScrollbars="false"
-    android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
-    android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin"
     tools:context="com.rxjava2.android.samples.ui.OperatorsActivity">
 
     <LinearLayout
@@ -232,5 +232,12 @@
             android:text="@string/switch_map"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startTakeWhileActivity"
+            android:text="@string/take_while"
+            android:textColor="@android:color/black" />
+
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 8f3273f..c81dcc2 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -43,4 +43,5 @@
     <string name="compose">Compose for reusable</string>
     <string name="result">Result</string>
     <string name="switch_map">Switch Map</string>
+    <string name="take_while">Take While</string>
 </resources>

From 83e169f75666c71d420b236e0b3af443eff07ff1 Mon Sep 17 00:00:00 2001
From: Mohammed Rampurawala <mohom.007@gmai.com>
Date: Sat, 8 Dec 2018 08:39:00 +0530
Subject: [PATCH 107/137] - TakeUntil Operator added.

---
 app/src/main/AndroidManifest.xml              |  3 +
 .../android/samples/ui/OperatorsActivity.java |  5 ++
 .../operators/TakeOperatorBaseActivity.java   | 71 +++++++++++++++++++
 .../operators/TakeUntilExampleActivity.java   | 45 ++++++++++++
 .../operators/TakeWhileExampleActivity.java   | 62 +---------------
 .../main/res/layout/activity_operators.xml    |  7 ++
 app/src/main/res/values/strings.xml           |  1 +
 7 files changed, 134 insertions(+), 60 deletions(-)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeOperatorBaseActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeUntilExampleActivity.java

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index a737733..492a93f 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -131,6 +131,9 @@
 
         <activity android:name=".ui.operators.TakeWhileExampleActivity"
             android:label="@string/take_while"/>
+
+        <activity android:name=".ui.operators.TakeUntilExampleActivity"
+            android:label="@string/take_until"/>
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
index 4e99dc9..3986c9a 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/OperatorsActivity.java
@@ -31,6 +31,7 @@
 import com.rxjava2.android.samples.ui.operators.SkipExampleActivity;
 import com.rxjava2.android.samples.ui.operators.SwitchMapExampleActivity;
 import com.rxjava2.android.samples.ui.operators.TakeExampleActivity;
+import com.rxjava2.android.samples.ui.operators.TakeUntilExampleActivity;
 import com.rxjava2.android.samples.ui.operators.TakeWhileExampleActivity;
 import com.rxjava2.android.samples.ui.operators.ThrottleFirstExampleActivity;
 import com.rxjava2.android.samples.ui.operators.ThrottleLastExampleActivity;
@@ -175,4 +176,8 @@ public void startSwitchMapActivity(View view) {
     public void startTakeWhileActivity(View view) {
         startActivity(new Intent(OperatorsActivity.this, TakeWhileExampleActivity.class));
     }
+
+    public void startTakeUntilActivity(View view) {
+        startActivity(new Intent(OperatorsActivity.this, TakeUntilExampleActivity.class));
+    }
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeOperatorBaseActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeOperatorBaseActivity.java
new file mode 100644
index 0000000..a078b5b
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeOperatorBaseActivity.java
@@ -0,0 +1,71 @@
+package com.rxjava2.android.samples.ui.operators;
+
+import android.os.Bundle;
+import android.util.Log;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+import com.rxjava2.android.samples.utils.ObserverAdapter;
+
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
+
+public abstract class TakeOperatorBaseActivity extends AppCompatActivity {
+    private static final String TAG = TakeWhileExampleActivity.class.getSimpleName();
+
+    private Button btn;
+
+    protected TextView textView;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
+
+        btn.setOnClickListener(view -> {
+            doSomeWork();
+        });
+    }
+
+    /**
+     * Need to be override based on the operation.
+     */
+    abstract void doSomeWork();
+
+    protected Observer<? super String> getObserver() {
+        return new ObserverAdapter<String>() {
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(String value) {
+                textView.append(" onNext : value : " + value);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext value : " + value);
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+
+    protected Observable<String> getStringObservable() {
+        return Observable.just("Alpha", "Beta", "Cupcake", "Doughnut", "Eclair", "Froyo", "GingerBread",
+                "Honeycomb", "Ice cream sandwich");
+    }
+
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeUntilExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeUntilExampleActivity.java
new file mode 100644
index 0000000..e0313d0
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeUntilExampleActivity.java
@@ -0,0 +1,45 @@
+package com.rxjava2.android.samples.ui.operators;
+
+import android.util.Log;
+
+import com.rxjava2.android.samples.utils.AppConstant;
+import com.rxjava2.android.samples.utils.ObserverAdapter;
+
+import java.util.concurrent.TimeUnit;
+
+import io.reactivex.Observable;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.functions.BiFunction;
+
+public class TakeUntilExampleActivity extends TakeOperatorBaseActivity {
+
+    private static final String TAG = TakeWhileExampleActivity.class.getSimpleName();
+
+    @Override
+    protected void doSomeWork() {
+        Observable<Long> timerObservable = Observable.timer(5, TimeUnit.SECONDS);
+        timerObservable.subscribe(new ObserverAdapter<Long>() {
+            @Override
+            public void onComplete() {
+                String print = " Timer completed";
+                textView.append(print);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, print);
+            }
+        });
+
+        getStringObservable()
+                //Delay item emission by one second
+                .zipWith(Observable.interval(0, 1, TimeUnit.SECONDS), new BiFunction<String, Long, String>() {
+                    @Override
+                    public String apply(String s, Long aLong) throws Exception {
+                        return s;
+                    }
+                })
+                //Will receive the items from Strings observable until timerObservable doesn't start emitting data.
+                .takeUntil(timerObservable)
+                //We need to observe on MainThread because delay works on background thread to avoid UI blocking.
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getObserver());
+    }
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeWhileExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeWhileExampleActivity.java
index 6ca1450..213b779 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeWhileExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeWhileExampleActivity.java
@@ -1,46 +1,18 @@
 package com.rxjava2.android.samples.ui.operators;
 
-import android.os.Bundle;
-import android.util.Log;
-import android.widget.Button;
-import android.widget.TextView;
-
-import com.rxjava2.android.samples.R;
-import com.rxjava2.android.samples.utils.AppConstant;
-import com.rxjava2.android.samples.utils.ObserverAdapter;
-
 import java.util.concurrent.TimeUnit;
 
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
-import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
 import io.reactivex.functions.BiFunction;
 import io.reactivex.functions.Predicate;
 
-public class TakeWhileExampleActivity extends AppCompatActivity {
+public class TakeWhileExampleActivity extends TakeOperatorBaseActivity {
 
     private static final String TAG = TakeWhileExampleActivity.class.getSimpleName();
 
-    private Button btn;
-
-    private TextView textView;
-
     @Override
-    protected void onCreate(@Nullable Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_example);
-        btn = findViewById(R.id.btn);
-        textView = findViewById(R.id.textView);
-
-        btn.setOnClickListener(view -> {
-            doSomeWork();
-        });
-    }
-
-    private void doSomeWork() {
+    protected void doSomeWork() {
         getStringObservable()
                 //Delay item emission by one second
                 .zipWith(Observable.interval(0, 1, TimeUnit.SECONDS), new BiFunction<String, Long, String>() {
@@ -60,34 +32,4 @@ public boolean test(String s) throws Exception {
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(getObserver());
     }
-
-    private Observer<? super String> getObserver() {
-        return new ObserverAdapter<String>() {
-            @Override
-            public void onSubscribe(Disposable d) {
-                Log.d(TAG, " onSubscribe : " + d.isDisposed());
-            }
-
-            @Override
-            public void onNext(String value) {
-                textView.append(" onNext : value : " + value);
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onNext value : " + value);
-            }
-
-            @Override
-            public void onComplete() {
-                textView.append(" onComplete");
-                textView.append(AppConstant.LINE_SEPARATOR);
-                Log.d(TAG, " onComplete");
-            }
-        };
-    }
-
-
-    private Observable<String> getStringObservable() {
-        return Observable.just("Alpha", "Beta", "Cupcake", "Doughnut", "Eclair", "Froyo", "GingerBread",
-                "Honeycomb", "Ice cream sandwich");
-    }
-
 }
diff --git a/app/src/main/res/layout/activity_operators.xml b/app/src/main/res/layout/activity_operators.xml
index 13a39b8..095a030 100644
--- a/app/src/main/res/layout/activity_operators.xml
+++ b/app/src/main/res/layout/activity_operators.xml
@@ -239,5 +239,12 @@
             android:text="@string/take_while"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startTakeUntilActivity"
+            android:text="@string/take_until"
+            android:textColor="@android:color/black" />
+
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index c81dcc2..2edcdb4 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -44,4 +44,5 @@
     <string name="result">Result</string>
     <string name="switch_map">Switch Map</string>
     <string name="take_while">Take While</string>
+    <string name="take_until">Take Until</string>
 </resources>

From 76708337c4550f3e79ba1b9cd78534393c9cf333 Mon Sep 17 00:00:00 2001
From: VigneshRamakrishnan <vignesh150493@gmail.com>
Date: Sat, 19 Jan 2019 18:52:26 +0530
Subject: [PATCH 108/137] Prevent onComplete on text submit in SearchView

---
 .../rxjava2/android/samples/ui/search/RxSearchObservable.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/search/RxSearchObservable.java b/app/src/main/java/com/rxjava2/android/samples/ui/search/RxSearchObservable.java
index 6360030..9189214 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/search/RxSearchObservable.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/search/RxSearchObservable.java
@@ -22,7 +22,7 @@ public static Observable<String> fromView(SearchView searchView) {
         searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
             @Override
             public boolean onQueryTextSubmit(String s) {
-                subject.onComplete();
+                subject.onNext(s);
                 return true;
             }
 

From 7f4f263663ebdb0022b7915ef9bdc74c7e31b93f Mon Sep 17 00:00:00 2001
From: Nazarii Moshenskyi <moshenskyi.nazariy@gmail.com>
Date: Mon, 25 Feb 2019 17:11:38 +0200
Subject: [PATCH 109/137] Refactored code.

Fixed text appearance
---
 .../ui/operators/WindowExampleActivity.java   | 78 ++++++++++++++++++-
 1 file changed, 77 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
index db2ed70..881db12 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/WindowExampleActivity.java
@@ -1 +1,77 @@
-package com.rxjava2.android.samples.ui.operators;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.rxjava2.android.samples.R;
import com.rxjava2.android.samples.utils.AppConstant;

import java.util.concurrent.TimeUnit;

import androidx.appcompat.app.AppCompatActivity;
import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;


public class WindowExampleActivity extends AppCompatActivity {

    private static final String TAG = WindowExampleActivity.class.getSimpleName();
    Button btn;
    TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_example);
        btn = findViewById(R.id.btn);
        textView = findViewById(R.id.textView);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                doSomeWork();
            }
        });
    }


    /*
     * Example using window operator -> It periodically
     * subdivide items from an Observable into
     * Observable windows and emit these windows rather than
     * emitting the items one at a time
     */
    protected void doSomeWork() {

        Observable.interval(1, TimeUnit.SECONDS).take(12)
                .window(3, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(getConsumer());
    }

    public Consumer<Observable<Long>> getConsumer() {
        return new Consumer<Observable<Long>>() {
            @Override
            public void accept(Observable<Long> observable) {
                Log.d(TAG, "Sub Divide begin....");
                textView.append("Sub Divide begin ....");
                textView.append(AppConstant.LINE_SEPARATOR);
                observable
                        .subscribeOn(Schedulers.io())
                        .observeOn(AndroidSchedulers.mainThread())
                        .subscribe(new Consumer<Long>() {
                            @Override
                            public void accept(Long value) {
                                Log.d(TAG, "Next:" + value);
                                textView.append("Next:" + value);
                                textView.append(AppConstant.LINE_SEPARATOR);
                            }
                        });
            }
        };
    }
}
\ No newline at end of file
+package com.rxjava2.android.samples.ui.operators;
+
+import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import java.util.concurrent.TimeUnit;
+
+import androidx.appcompat.app.AppCompatActivity;
+import io.reactivex.Observable;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.functions.Consumer;
+import io.reactivex.schedulers.Schedulers;
+
+public class WindowExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = WindowExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = findViewById(R.id.btn);
+        textView = findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+    }
+
+    /*
+     * Example using window operator -> It periodically
+     * subdivide items from an Observable into
+     * Observable windows and emit these windows rather than
+     * emitting the items one at a time
+     */
+    protected void doSomeWork() {
+
+        Observable.interval(1, TimeUnit.SECONDS).take(12)
+                .window(3, TimeUnit.SECONDS)
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(getConsumer());
+    }
+
+    public Consumer<Observable<Long>> getConsumer() {
+        return new Consumer<Observable<Long>>() {
+            @Override
+            public void accept(Observable<Long> observable) {
+                Log.d(TAG, "Sub Divide begin....");
+                textView.append("Sub Divide begin ....");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                observable
+                        .subscribeOn(Schedulers.io())
+                        .observeOn(AndroidSchedulers.mainThread())
+                        .subscribe(new Consumer<Long>() {
+                            @Override
+                            public void accept(Long value) {
+                                Log.d(TAG, "Next:" + value);
+                                textView.append("Next:" + value);
+                                textView.append(AppConstant.LINE_SEPARATOR);
+                            }
+                        });
+            }
+        };
+    }
+}

From 27cf2bb91a14ced24ae616bc94871d4de9330999 Mon Sep 17 00:00:00 2001
From: amitshekhariitbhu <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 19 Mar 2019 14:04:55 +0530
Subject: [PATCH 110/137] Add Cache Example Using Concat

---
 app/src/main/AndroidManifest.xml              |  6 +-
 .../android/samples/ui/SelectionActivity.java |  5 +
 .../ui/cache/CacheExampleActivity.java        | 93 +++++++++++++++++++
 .../android/samples/ui/cache/model/Data.java  | 12 +++
 .../samples/ui/cache/source/DataSource.java   | 45 +++++++++
 .../ui/cache/source/DiskDataSource.java       | 30 ++++++
 .../ui/cache/source/MemoryDataSource.java     | 31 +++++++
 .../ui/cache/source/NetworkDataSource.java    | 23 +++++
 .../main/res/layout/activity_selection.xml    | 11 ++-
 app/src/main/res/values/strings.xml           |  1 +
 10 files changed, 254 insertions(+), 3 deletions(-)
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/cache/model/Data.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DiskDataSource.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/cache/source/MemoryDataSource.java
 create mode 100644 app/src/main/java/com/rxjava2/android/samples/ui/cache/source/NetworkDataSource.java

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index ec63671..0006b4e 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -24,6 +24,9 @@
         <activity
             android:name=".ui.networking.NetworkingActivity"
             android:label="@string/networking" />
+        <activity
+            android:name=".ui.cache.CacheExampleActivity"
+            android:label="@string/cache" />
         <activity
             android:name=".ui.rxbus.RxBusActivity"
             android:label="@string/rx_bus" />
@@ -126,7 +129,8 @@
         <activity
             android:name=".ui.compose.ComposeOperatorExampleActivity"
             android:label="@string/compose" />
-        <activity android:name=".ui.operators.SwitchMapExampleActivity"
+        <activity
+            android:name=".ui.operators.SwitchMapExampleActivity"
             android:label="@string/switch_map" />
     </application>
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
index d3c6082..b2c88e2 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/SelectionActivity.java
@@ -7,6 +7,7 @@
 
 import com.rxjava2.android.samples.MyApplication;
 import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.ui.cache.CacheExampleActivity;
 import com.rxjava2.android.samples.ui.compose.ComposeOperatorExampleActivity;
 import com.rxjava2.android.samples.ui.networking.NetworkingActivity;
 import com.rxjava2.android.samples.ui.pagination.PaginationActivity;
@@ -29,6 +30,10 @@ public void startNetworkingActivity(View view) {
         startActivity(new Intent(SelectionActivity.this, NetworkingActivity.class));
     }
 
+    public void startCacheActivity(View view) {
+        startActivity(new Intent(SelectionActivity.this, CacheExampleActivity.class));
+    }
+
     public void startRxBusActivity(View view) {
         ((MyApplication) getApplication()).sendAutoEvent();
         startActivity(new Intent(SelectionActivity.this, RxBusActivity.class));
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java
new file mode 100644
index 0000000..25cc500
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java
@@ -0,0 +1,93 @@
+package com.rxjava2.android.samples.ui.cache;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.rxjava2.android.samples.R;
+import com.rxjava2.android.samples.ui.cache.model.Data;
+import com.rxjava2.android.samples.ui.cache.source.DataSource;
+import com.rxjava2.android.samples.ui.cache.source.DiskDataSource;
+import com.rxjava2.android.samples.ui.cache.source.MemoryDataSource;
+import com.rxjava2.android.samples.ui.cache.source.NetworkDataSource;
+import com.rxjava2.android.samples.utils.AppConstant;
+
+import io.reactivex.Observable;
+import io.reactivex.Observer;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.schedulers.Schedulers;
+
+public class CacheExampleActivity extends AppCompatActivity {
+
+    private static final String TAG = CacheExampleActivity.class.getSimpleName();
+    Button btn;
+    TextView textView;
+    DataSource dataSource;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_example);
+        btn = (Button) findViewById(R.id.btn);
+        textView = (TextView) findViewById(R.id.textView);
+
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                doSomeWork();
+            }
+        });
+
+        dataSource = new DataSource(new MemoryDataSource(), new DiskDataSource(), new NetworkDataSource());
+    }
+
+    private void doSomeWork() {
+
+        Observable<Data> memory = dataSource.getDataFromMemory();
+        Observable<Data> disk = dataSource.getDataFromDisk();
+        Observable<Data> network = dataSource.getDataFromNetwork();
+
+        Observable.concat(memory, disk, network)
+                .firstElement()
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .toObservable()
+                .subscribe(getObserver());
+    }
+
+    private Observer<Data> getObserver() {
+        return new Observer<Data>() {
+
+            @Override
+            public void onSubscribe(Disposable d) {
+                Log.d(TAG, " onSubscribe : " + d.isDisposed());
+            }
+
+            @Override
+            public void onNext(Data data) {
+                textView.append(" onNext : " + data.source);
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onNext : " + data.source);
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                textView.append(" onError : " + e.getMessage());
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onError : " + e.getMessage());
+            }
+
+            @Override
+            public void onComplete() {
+                textView.append(" onComplete");
+                textView.append(AppConstant.LINE_SEPARATOR);
+                Log.d(TAG, " onComplete");
+            }
+        };
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/model/Data.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/model/Data.java
new file mode 100644
index 0000000..477144e
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/model/Data.java
@@ -0,0 +1,12 @@
+package com.rxjava2.android.samples.ui.cache.model;
+
+public class Data {
+
+    public String source;
+
+    @SuppressWarnings("CloneDoesntDeclareCloneNotSupportedException")
+    @Override
+    public Data clone() {
+        return new Data();
+    }
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java
new file mode 100644
index 0000000..f0297ed
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java
@@ -0,0 +1,45 @@
+package com.rxjava2.android.samples.ui.cache.source;
+
+import com.rxjava2.android.samples.ui.cache.model.Data;
+
+import io.reactivex.Observable;
+import io.reactivex.functions.Consumer;
+
+public class DataSource {
+
+    private final MemoryDataSource memoryDataSource;
+    private final DiskDataSource diskDataSource;
+    private final NetworkDataSource networkDataSource;
+
+    public DataSource(MemoryDataSource memoryDataSource,
+                      DiskDataSource diskDataSource,
+                      NetworkDataSource networkDataSource) {
+        this.memoryDataSource = memoryDataSource;
+        this.diskDataSource = diskDataSource;
+        this.networkDataSource = networkDataSource;
+    }
+
+    public Observable<Data> getDataFromMemory() {
+        return memoryDataSource.getData();
+    }
+
+    public Observable<Data> getDataFromDisk() {
+        return diskDataSource.getData().doOnNext(new Consumer<Data>() {
+            @Override
+            public void accept(Data data) throws Exception {
+                memoryDataSource.cacheInMemory(data);
+            }
+        });
+    }
+
+    public Observable<Data> getDataFromNetwork() {
+        return networkDataSource.getData().doOnNext(new Consumer<Data>() {
+            @Override
+            public void accept(Data data) throws Exception {
+                diskDataSource.saveToDisk(data);
+                memoryDataSource.cacheInMemory(data);
+            }
+        });
+    }
+
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DiskDataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DiskDataSource.java
new file mode 100644
index 0000000..2d9628b
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DiskDataSource.java
@@ -0,0 +1,30 @@
+package com.rxjava2.android.samples.ui.cache.source;
+
+import com.rxjava2.android.samples.ui.cache.model.Data;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableEmitter;
+import io.reactivex.ObservableOnSubscribe;
+
+public class DiskDataSource {
+
+    private Data data;
+
+    public Observable<Data> getData() {
+        return Observable.create(new ObservableOnSubscribe<Data>() {
+            @Override
+            public void subscribe(ObservableEmitter<Data> emitter) throws Exception {
+                if (data != null) {
+                    emitter.onNext(data);
+                }
+                emitter.onComplete();
+            }
+        });
+    }
+
+    public void saveToDisk(Data data) {
+        this.data = data.clone();
+        this.data.source = "disk";
+    }
+
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/MemoryDataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/MemoryDataSource.java
new file mode 100644
index 0000000..215d63c
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/MemoryDataSource.java
@@ -0,0 +1,31 @@
+package com.rxjava2.android.samples.ui.cache.source;
+
+import com.rxjava2.android.samples.ui.cache.model.Data;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableEmitter;
+import io.reactivex.ObservableOnSubscribe;
+
+public class MemoryDataSource {
+
+    private Data data;
+
+    public Observable<Data> getData() {
+        return Observable.create(new ObservableOnSubscribe<Data>() {
+            @Override
+            public void subscribe(ObservableEmitter<Data> emitter) throws Exception {
+                if (data != null) {
+                    emitter.onNext(data);
+                }
+                emitter.onComplete();
+            }
+        });
+    }
+
+    public void cacheInMemory(Data data) {
+        this.data = data.clone();
+        this.data.source = "memory";
+
+    }
+
+}
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/NetworkDataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/NetworkDataSource.java
new file mode 100644
index 0000000..632fde8
--- /dev/null
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/NetworkDataSource.java
@@ -0,0 +1,23 @@
+package com.rxjava2.android.samples.ui.cache.source;
+
+import com.rxjava2.android.samples.ui.cache.model.Data;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableEmitter;
+import io.reactivex.ObservableOnSubscribe;
+
+public class NetworkDataSource {
+
+    public Observable<Data> getData() {
+        return Observable.create(new ObservableOnSubscribe<Data>() {
+            @Override
+            public void subscribe(ObservableEmitter<Data> emitter) throws Exception {
+                Data data = new Data();
+                data.source = "network";
+                emitter.onNext(data);
+                emitter.onComplete();
+            }
+        });
+    }
+
+}
diff --git a/app/src/main/res/layout/activity_selection.xml b/app/src/main/res/layout/activity_selection.xml
index 2c42930..999f99c 100644
--- a/app/src/main/res/layout/activity_selection.xml
+++ b/app/src/main/res/layout/activity_selection.xml
@@ -4,10 +4,10 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:fadeScrollbars="false"
-    android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
-    android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin"
     tools:context="com.rxjava2.android.samples.ui.SelectionActivity">
 
     <LinearLayout
@@ -29,6 +29,13 @@
             android:text="@string/networking"
             android:textColor="@android:color/black" />
 
+        <Button
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="startCacheActivity"
+            android:text="@string/cache"
+            android:textColor="@android:color/black" />
+
         <Button
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 8f3273f..90e11b9 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -3,6 +3,7 @@
     <string name="doSomeWork">doSomeWork</string>
     <string name="operators">Operators</string>
     <string name="networking">Networking</string>
+    <string name="cache">Cache</string>
     <string name="pagination">Pagination</string>
     <string name="search">Search</string>
     <string name="simple">Simple</string>

From 1d7b06a17311a75eb6dee2078d8b0821c2415b56 Mon Sep 17 00:00:00 2001
From: amitshekhariitbhu <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 19 Mar 2019 14:13:55 +0530
Subject: [PATCH 111/137] Add comments for cache

---
 .../android/samples/ui/cache/CacheExampleActivity.java        | 2 +-
 .../rxjava2/android/samples/ui/cache/source/DataSource.java   | 3 +++
 .../android/samples/ui/cache/source/DiskDataSource.java       | 3 +++
 .../android/samples/ui/cache/source/MemoryDataSource.java     | 4 +++-
 .../android/samples/ui/cache/source/NetworkDataSource.java    | 4 ++++
 5 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java
index 25cc500..bd98f63 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java
@@ -1,7 +1,6 @@
 package com.rxjava2.android.samples.ui.cache;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -15,6 +14,7 @@
 import com.rxjava2.android.samples.ui.cache.source.NetworkDataSource;
 import com.rxjava2.android.samples.utils.AppConstant;
 
+import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.Observer;
 import io.reactivex.android.schedulers.AndroidSchedulers;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java
index f0297ed..1848c89 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java
@@ -5,6 +5,9 @@
 import io.reactivex.Observable;
 import io.reactivex.functions.Consumer;
 
+/**
+ * The DataSource to handle 3 data sources - memory, disk, network
+ */
 public class DataSource {
 
     private final MemoryDataSource memoryDataSource;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DiskDataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DiskDataSource.java
index 2d9628b..168e998 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DiskDataSource.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DiskDataSource.java
@@ -6,6 +6,9 @@
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
 
+/**
+ * Class to simulate Disk DataSource
+ */
 public class DiskDataSource {
 
     private Data data;
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/MemoryDataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/MemoryDataSource.java
index 215d63c..4c83a19 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/MemoryDataSource.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/MemoryDataSource.java
@@ -6,6 +6,9 @@
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
 
+/**
+ * Class to simulate InMemory DataSource
+ */
 public class MemoryDataSource {
 
     private Data data;
@@ -25,7 +28,6 @@ public void subscribe(ObservableEmitter<Data> emitter) throws Exception {
     public void cacheInMemory(Data data) {
         this.data = data.clone();
         this.data.source = "memory";
-
     }
 
 }
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/NetworkDataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/NetworkDataSource.java
index 632fde8..1d0d666 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/NetworkDataSource.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/NetworkDataSource.java
@@ -6,6 +6,10 @@
 import io.reactivex.ObservableEmitter;
 import io.reactivex.ObservableOnSubscribe;
 
+
+/**
+ * Class to simulate Network DataSource
+ */
 public class NetworkDataSource {
 
     public Observable<Data> getData() {

From 3941eba77eb98bf86125dace2a8c361f676af505 Mon Sep 17 00:00:00 2001
From: amitshekhariitbhu <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 19 Mar 2019 14:43:36 +0530
Subject: [PATCH 112/137] Covert to lambda

---
 .../samples/ui/cache/source/DataSource.java     | 17 ++++-------------
 .../samples/ui/cache/source/DiskDataSource.java | 13 ++++---------
 .../ui/cache/source/MemoryDataSource.java       | 13 ++++---------
 .../ui/cache/source/NetworkDataSource.java      | 15 +++++----------
 4 files changed, 17 insertions(+), 41 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java
index 1848c89..3f7e5d9 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java
@@ -3,7 +3,6 @@
 import com.rxjava2.android.samples.ui.cache.model.Data;
 
 import io.reactivex.Observable;
-import io.reactivex.functions.Consumer;
 
 /**
  * The DataSource to handle 3 data sources - memory, disk, network
@@ -27,21 +26,13 @@ public Observable<Data> getDataFromMemory() {
     }
 
     public Observable<Data> getDataFromDisk() {
-        return diskDataSource.getData().doOnNext(new Consumer<Data>() {
-            @Override
-            public void accept(Data data) throws Exception {
-                memoryDataSource.cacheInMemory(data);
-            }
-        });
+        return diskDataSource.getData().doOnNext(memoryDataSource::cacheInMemory);
     }
 
     public Observable<Data> getDataFromNetwork() {
-        return networkDataSource.getData().doOnNext(new Consumer<Data>() {
-            @Override
-            public void accept(Data data) throws Exception {
-                diskDataSource.saveToDisk(data);
-                memoryDataSource.cacheInMemory(data);
-            }
+        return networkDataSource.getData().doOnNext(data -> {
+            diskDataSource.saveToDisk(data);
+            memoryDataSource.cacheInMemory(data);
         });
     }
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DiskDataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DiskDataSource.java
index 168e998..29f5bfa 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DiskDataSource.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DiskDataSource.java
@@ -3,8 +3,6 @@
 import com.rxjava2.android.samples.ui.cache.model.Data;
 
 import io.reactivex.Observable;
-import io.reactivex.ObservableEmitter;
-import io.reactivex.ObservableOnSubscribe;
 
 /**
  * Class to simulate Disk DataSource
@@ -14,14 +12,11 @@ public class DiskDataSource {
     private Data data;
 
     public Observable<Data> getData() {
-        return Observable.create(new ObservableOnSubscribe<Data>() {
-            @Override
-            public void subscribe(ObservableEmitter<Data> emitter) throws Exception {
-                if (data != null) {
-                    emitter.onNext(data);
-                }
-                emitter.onComplete();
+        return Observable.create(emitter -> {
+            if (data != null) {
+                emitter.onNext(data);
             }
+            emitter.onComplete();
         });
     }
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/MemoryDataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/MemoryDataSource.java
index 4c83a19..2742f26 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/MemoryDataSource.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/MemoryDataSource.java
@@ -3,8 +3,6 @@
 import com.rxjava2.android.samples.ui.cache.model.Data;
 
 import io.reactivex.Observable;
-import io.reactivex.ObservableEmitter;
-import io.reactivex.ObservableOnSubscribe;
 
 /**
  * Class to simulate InMemory DataSource
@@ -14,14 +12,11 @@ public class MemoryDataSource {
     private Data data;
 
     public Observable<Data> getData() {
-        return Observable.create(new ObservableOnSubscribe<Data>() {
-            @Override
-            public void subscribe(ObservableEmitter<Data> emitter) throws Exception {
-                if (data != null) {
-                    emitter.onNext(data);
-                }
-                emitter.onComplete();
+        return Observable.create(emitter -> {
+            if (data != null) {
+                emitter.onNext(data);
             }
+            emitter.onComplete();
         });
     }
 
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/NetworkDataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/NetworkDataSource.java
index 1d0d666..d903fb0 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/NetworkDataSource.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/NetworkDataSource.java
@@ -3,8 +3,6 @@
 import com.rxjava2.android.samples.ui.cache.model.Data;
 
 import io.reactivex.Observable;
-import io.reactivex.ObservableEmitter;
-import io.reactivex.ObservableOnSubscribe;
 
 
 /**
@@ -13,14 +11,11 @@
 public class NetworkDataSource {
 
     public Observable<Data> getData() {
-        return Observable.create(new ObservableOnSubscribe<Data>() {
-            @Override
-            public void subscribe(ObservableEmitter<Data> emitter) throws Exception {
-                Data data = new Data();
-                data.source = "network";
-                emitter.onNext(data);
-                emitter.onComplete();
-            }
+        return Observable.create(emitter -> {
+            Data data = new Data();
+            data.source = "network";
+            emitter.onNext(data);
+            emitter.onComplete();
         });
     }
 

From f49406b3619be76474dde90e435844cbeec4e024 Mon Sep 17 00:00:00 2001
From: amitshekhariitbhu <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 19 Mar 2019 15:39:02 +0530
Subject: [PATCH 113/137] Remove method reference

---
 .../rxjava2/android/samples/ui/cache/source/DataSource.java   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java
index 3f7e5d9..23403ff 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/cache/source/DataSource.java
@@ -26,7 +26,9 @@ public Observable<Data> getDataFromMemory() {
     }
 
     public Observable<Data> getDataFromDisk() {
-        return diskDataSource.getData().doOnNext(memoryDataSource::cacheInMemory);
+        return diskDataSource.getData().doOnNext(data ->
+                memoryDataSource.cacheInMemory(data)
+        );
     }
 
     public Observable<Data> getDataFromNetwork() {

From e483609bd510b2d878254b86f455af932f2b919b Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 19 Mar 2019 17:02:22 +0530
Subject: [PATCH 114/137] Add Implement Caching Using RxJava Operators

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 1e1d05a..777e4d8 100644
--- a/README.md
+++ b/README.md
@@ -108,6 +108,7 @@ RxJava1 -> RxJava2
 * [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView
 * [ComposeOperatorExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java) - Compose operator for reusable
 * [Search Implementation](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java) - Using `debounce`, `switchMap`, `distinctUntilChanged`, [Blog for reference](https://blog.mindorks.com/implement-search-using-rxjava-operators-c8882b64fe1d)
+* [Implement Caching Using RxJava Operators](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java) - Using `concat`, `firstElement`, [Blog for reference](https://blog.mindorks.com/implement-caching-in-android-using-rxjava-operators)
 * [PublishSubjectExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java)
 
 ### TODO 

From 3037e3ba55a5b007626527d61fde2a7dc142d98b Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Wed, 20 Mar 2019 17:55:35 +0530
Subject: [PATCH 115/137] Add Zip Blog

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 777e4d8..ee8782f 100644
--- a/README.md
+++ b/README.md
@@ -92,7 +92,7 @@ RxJava1 -> RxJava2
 * [SingleObserverExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java) - Using `SingleObserver`
 * [CompletableObserverActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java) - Using `CompletableObserver`
 * [MapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java) - Using `map` Operator
-* [ZipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java) - Using `zip` Operator
+* [ZipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java) - Using `zip` Operator, [Blog for reference](https://blog.mindorks.com/understanding-rxjava-zip-operator-with-example)
 * [BufferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java) - Using `buffer` Operator
 * [TakeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java) - Using `take` Operator
 * [ReduceExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java) - Using `reduce` Operator

From 44924bda17a8724aaf77cedb4bed87b537a830da Mon Sep 17 00:00:00 2001
From: amitshekhariitbhu <amit.shekhar.iitbhu@gmail.com>
Date: Wed, 27 Mar 2019 15:02:43 +0530
Subject: [PATCH 116/137] Add Schedulers in each observable in Zip Example

---
 .../samples/ui/operators/ZipExampleActivity.java   | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
index 18c97f3..11cb394 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java
@@ -48,11 +48,11 @@ public void onClick(View view) {
     }
 
     /*
-    * Here we are getting two user list
-    * One, the list of cricket fans
-    * Another one, the list of football fans
-    * Then we are finding the list of users who loves both
-    */
+     * Here we are getting two user list
+     * One, the list of cricket fans
+     * Another one, the list of football fans
+     * Then we are finding the list of users who loves both
+     */
     private void doSomeWork() {
         Observable.zip(getCricketFansObservable(), getFootballFansObservable(),
                 new BiFunction<List<User>, List<User>, List<User>>() {
@@ -77,7 +77,7 @@ public void subscribe(ObservableEmitter<List<User>> e) {
                     e.onComplete();
                 }
             }
-        });
+        }).subscribeOn(Schedulers.io());
     }
 
     private Observable<List<User>> getFootballFansObservable() {
@@ -89,7 +89,7 @@ public void subscribe(ObservableEmitter<List<User>> e) {
                     e.onComplete();
                 }
             }
-        });
+        }).subscribeOn(Schedulers.io());
     }
 
     private Observer<List<User>> getObserver() {

From 705bb84a5fbd3d4a36755f17c6e08cfa705b0d7f Mon Sep 17 00:00:00 2001
From: amitshekhariitbhu <amit.shekhar.iitbhu@gmail.com>
Date: Sun, 7 Apr 2019 15:00:27 +0530
Subject: [PATCH 117/137] Change Flowable to Single in Pagination

---
 .../ui/pagination/PaginationActivity.java     | 53 ++++++++-----------
 app/src/main/res/layout/item_pagination.xml   |  2 +-
 2 files changed, 23 insertions(+), 32 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
index 2cca2d7..202be46 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
@@ -6,8 +6,6 @@
 
 import com.rxjava2.android.samples.R;
 
-import org.reactivestreams.Publisher;
-
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
@@ -15,14 +13,12 @@
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
-import io.reactivex.Flowable;
+import io.reactivex.Single;
 import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.annotations.NonNull;
 import io.reactivex.disposables.CompositeDisposable;
 import io.reactivex.disposables.Disposable;
-import io.reactivex.functions.Consumer;
-import io.reactivex.functions.Function;
 import io.reactivex.processors.PublishProcessor;
+import io.reactivex.schedulers.Schedulers;
 
 /**
  * Created by amitshekhar on 15/03/17.
@@ -94,23 +90,21 @@ private void subscribeForData() {
 
         Disposable disposable = paginator
                 .onBackpressureDrop()
-                .concatMap(new Function<Integer, Publisher<List<String>>>() {
-                    @Override
-                    public Publisher<List<String>> apply(@NonNull Integer page) {
-                        loading = true;
-                        progressBar.setVisibility(View.VISIBLE);
-                        return dataFromNetwork(page);
-                    }
+                .doOnNext(page -> {
+                    loading = true;
+                    progressBar.setVisibility(View.VISIBLE);
                 })
+                .concatMapSingle(page -> dataFromNetwork(page)
+                        .subscribeOn(Schedulers.io())
+                        .doOnError(throwable -> {
+                            // handle error
+                        }))
                 .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(new Consumer<List<String>>() {
-                    @Override
-                    public void accept(@NonNull List<String> items) {
-                        paginationAdapter.addItems(items);
-                        paginationAdapter.notifyDataSetChanged();
-                        loading = false;
-                        progressBar.setVisibility(View.INVISIBLE);
-                    }
+                .subscribe(items -> {
+                    paginationAdapter.addItems(items);
+                    paginationAdapter.notifyDataSetChanged();
+                    loading = false;
+                    progressBar.setVisibility(View.INVISIBLE);
                 });
 
         compositeDisposable.add(disposable);
@@ -122,18 +116,15 @@ public void accept(@NonNull List<String> items) {
     /**
      * Simulation of network data
      */
-    private Flowable<List<String>> dataFromNetwork(final int page) {
-        return Flowable.just(true)
+    private Single<List<String>> dataFromNetwork(final int page) {
+        return Single.just(true)
                 .delay(2, TimeUnit.SECONDS)
-                .map(new Function<Boolean, List<String>>() {
-                    @Override
-                    public List<String> apply(@NonNull Boolean value) {
-                        List<String> items = new ArrayList<>();
-                        for (int i = 1; i <= 10; i++) {
-                            items.add("Item " + (page * 10 + i));
-                        }
-                        return items;
+                .map(value -> {
+                    List<String> items = new ArrayList<>();
+                    for (int i = 1; i <= 10; i++) {
+                        items.add("Item " + (page * 10 + i));
                     }
+                    return items;
                 });
     }
 }
diff --git a/app/src/main/res/layout/item_pagination.xml b/app/src/main/res/layout/item_pagination.xml
index 3e38887..5f1bfc2 100644
--- a/app/src/main/res/layout/item_pagination.xml
+++ b/app/src/main/res/layout/item_pagination.xml
@@ -5,4 +5,4 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:padding="@dimen/activity_horizontal_margin"
-    android:textSize="20sp" />
\ No newline at end of file
+    android:textSize="32sp" />
\ No newline at end of file

From 4a9bc275aff6824b4373a0cbadeab5d07a497cac Mon Sep 17 00:00:00 2001
From: amitshekhariitbhu <amit.shekhar.iitbhu@gmail.com>
Date: Thu, 30 May 2019 11:04:29 +0530
Subject: [PATCH 118/137] Add scheduleOn for zip

---
 .../ui/networking/NetworkingActivity.java     | 21 +++++++++++--------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
index a425a96..6878e3a 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/networking/NetworkingActivity.java
@@ -5,6 +5,8 @@
 import android.util.Pair;
 import android.view.View;
 
+import androidx.appcompat.app.AppCompatActivity;
+
 import com.rx2androidnetworking.Rx2AndroidNetworking;
 import com.rxjava2.android.samples.R;
 import com.rxjava2.android.samples.model.ApiUser;
@@ -15,7 +17,6 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.ObservableSource;
 import io.reactivex.Observer;
@@ -93,23 +94,25 @@ public void onComplete() {
     private Observable<List<User>> getCricketFansObservable() {
         return Rx2AndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllCricketFans")
                 .build()
-                .getObjectListObservable(User.class);
+                .getObjectListObservable(User.class)
+                .subscribeOn(Schedulers.io());
     }
 
     /*
-    * This observable return the list of User who loves Football
-    */
+     * This observable return the list of User who loves Football
+     */
     private Observable<List<User>> getFootballFansObservable() {
         return Rx2AndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllFootballFans")
                 .build()
-                .getObjectListObservable(User.class);
+                .getObjectListObservable(User.class)
+                .subscribeOn(Schedulers.io());
     }
 
     /*
-    * This do the complete magic, make both network call
-    * and then returns the list of user who loves both
-    * Using zip operator to get both response at a time
-    */
+     * This do the complete magic, make both network call
+     * and then returns the list of user who loves both
+     * Using zip operator to get both response at a time
+     */
     private void findUsersWhoLovesBoth() {
         // here we are using zip operator to combine both request
         Observable.zip(getCricketFansObservable(), getFootballFansObservable(),

From a311cf860205578eb945fd1f954dea02cd65d392 Mon Sep 17 00:00:00 2001
From: amitshekhar <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 1 Jul 2019 21:19:24 +0530
Subject: [PATCH 119/137] Add Course link

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index ee8782f..e50cf72 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 [![Open Source Love](https://badges.frapsoft.com/os/v1/open-source.svg?v=102)](https://opensource.org/licenses/Apache-2.0)
 [![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/LICENSE)
 
-### Get the complete RxJava Course [here](https://mindorks.com/course/learn-rxjava)
+### [Take the MindOrks Android Online Course and Learn RxJava](https://bootcamp.mindorks.com)
 
 ## How to use RxJava 2 in Android Application
 ## How to migrate from RxJava 1.0 to RxJava 2.0

From 5e156ae216e3b3fc8d406d7aa75ad0b71a0e173a Mon Sep 17 00:00:00 2001
From: amitshekhar <amit.shekhar.iitbhu@gmail.com>
Date: Sat, 21 Sep 2019 09:03:36 +0530
Subject: [PATCH 120/137] Add onErrroReturn

---
 .../samples/ui/pagination/PaginationActivity.java     | 11 +++++++----
 .../android/samples/ui/search/SearchActivity.java     | 10 ++++++++--
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
index 202be46..e9c89a9 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java
@@ -4,15 +4,16 @@
 import android.view.View;
 import android.widget.ProgressBar;
 
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
 import com.rxjava2.android.samples.R;
 
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.recyclerview.widget.LinearLayoutManager;
-import androidx.recyclerview.widget.RecyclerView;
 import io.reactivex.Single;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.CompositeDisposable;
@@ -98,7 +99,9 @@ private void subscribeForData() {
                         .subscribeOn(Schedulers.io())
                         .doOnError(throwable -> {
                             // handle error
-                        }))
+                        })
+                            // continue emission in case of error also
+                        .onErrorReturn(throwable -> new ArrayList<>()))
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(items -> {
                     paginationAdapter.addItems(items);
diff --git a/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java b/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java
index 9086b01..d9353c9 100644
--- a/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java
+++ b/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java
@@ -4,11 +4,12 @@
 import android.widget.SearchView;
 import android.widget.TextView;
 
+import androidx.appcompat.app.AppCompatActivity;
+
 import com.rxjava2.android.samples.R;
 
 import java.util.concurrent.TimeUnit;
 
-import androidx.appcompat.app.AppCompatActivity;
 import io.reactivex.Observable;
 import io.reactivex.ObservableSource;
 import io.reactivex.android.schedulers.AndroidSchedulers;
@@ -56,7 +57,12 @@ public boolean test(String text) {
                 .switchMap(new Function<String, ObservableSource<String>>() {
                     @Override
                     public ObservableSource<String> apply(String query) {
-                        return dataFromNetwork(query);
+                        return dataFromNetwork(query)
+                                .doOnError(throwable -> {
+                                    // handle error
+                                })
+                                // continue emission in case of error also
+                                .onErrorReturn(throwable -> "");
                     }
                 })
                 .subscribeOn(Schedulers.io())

From c91b115648b9ff08b9d6441a03c4d2f511ca09de Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 12 Nov 2019 22:14:31 +0530
Subject: [PATCH 121/137] Update README.md

---
 README.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index e50cf72..d31d263 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@
 
 ## How to use RxJava 2 in Android Application
 ## How to migrate from RxJava 1.0 to RxJava 2.0
+## How to use RxJava 3 in Android Application [Check here](https://github.com/MindorksOpenSource/RxJava3-Android-Examples)
 
 ### This project is for : 
 * who is migrating to RxJava 2 
@@ -82,7 +83,7 @@ RxJava1 -> RxJava2
 * `Concat` -> emit the emissions from two or more Observables without interleaving them
 * `Replay` -> ensure that all observers see the same sequence of emitted items, even if they subscribe after the Observable has begun emitting items
 * `Merge` -> combine multiple Observables into one by merging their emissions
-* `SwitchMap` -> ransform the items emitted by an Observable into Observables, and mirror those items emitted by the most-recently transformed Observable
+* `SwitchMap` -> transform the items emitted by an Observable into Observables, and mirror those items emitted by the most-recently transformed Observable
 
 
 # Highlights of the examples :

From 001db6767810f3c7958129cbad5c74b813a5b1dd Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Thu, 26 Mar 2020 19:22:40 +0530
Subject: [PATCH 122/137] Update README.md

---
 README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/README.md b/README.md
index d31d263..99fa4e4 100644
--- a/README.md
+++ b/README.md
@@ -131,6 +131,10 @@ RxJava1 -> RxJava2
 ### Another awesome library for debugging databases and shared preferences.
 * [Android Debug Database](https://github.com/amitshekhariitbhu/Android-Debug-Database)
 
+
+### Learn to build a ride-sharing Android app like Uber, Lyft.
+* [Check here](https://github.com/MindorksOpenSource/ridesharing-uber-lyft-app)
+
 ### [Check out Mindorks awesome open source projects here](https://mindorks.com/open-source-projects)
 
 ### Contact - Let's become friend

From b5503dea6796bfd4792706fd8e070c64564311c8 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 20 Apr 2020 23:20:23 +0530
Subject: [PATCH 123/137] Update README.md

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 99fa4e4..8cc71ad 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,7 @@
 ## How to use RxJava 2 in Android Application
 ## How to migrate from RxJava 1.0 to RxJava 2.0
 ## How to use RxJava 3 in Android Application [Check here](https://github.com/MindorksOpenSource/RxJava3-Android-Examples)
+## Kotlin-Coroutines-Android-Examples - [Check here](https://github.com/MindorksOpenSource/Kotlin-Coroutines-Android-Examples)
 
 ### This project is for : 
 * who is migrating to RxJava 2 

From 30ef1de9b23f8e277b4e48afe2606239f845bd6e Mon Sep 17 00:00:00 2001
From: anandgaurav10 <anandgaurav9295@gmail.com>
Date: Sat, 28 May 2022 17:14:27 +0530
Subject: [PATCH 124/137] Add .github

---
 .github/FUNDING.yml | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 .github/FUNDING.yml

diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
new file mode 100644
index 0000000..cd443a1
--- /dev/null
+++ b/.github/FUNDING.yml
@@ -0,0 +1,13 @@
+# These are supported funding model platforms
+
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']

From 49e3dcdfaed070e43a4386f0d2a765c93bc7486c Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sun, 4 Sep 2022 11:04:46 +0530
Subject: [PATCH 125/137] Update .github

---
 .github/FUNDING.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
index cd443a1..25c1f0e 100644
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@@ -1,6 +1,6 @@
 # These are supported funding model platforms
 
-github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+github: [amitshekhariitbhu]
 patreon: # Replace with a single Patreon username
 open_collective: # Replace with a single Open Collective username
 ko_fi: # Replace with a single Ko-fi username

From 700d3b4e39a5cdfb7af459d801be67503aa333dc Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Fri, 16 Sep 2022 14:23:10 +0530
Subject: [PATCH 126/137] Update README.md

---
 README.md | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 8cc71ad..c8565e6 100644
--- a/README.md
+++ b/README.md
@@ -8,17 +8,16 @@
 [![Open Source Love](https://badges.frapsoft.com/os/v1/open-source.svg?v=102)](https://opensource.org/licenses/Apache-2.0)
 [![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/LICENSE)
 
-### [Take the MindOrks Android Online Course and Learn RxJava](https://bootcamp.mindorks.com)
 
-## How to use RxJava 2 in Android Application
-## How to migrate from RxJava 1.0 to RxJava 2.0
-## How to use RxJava 3 in Android Application [Check here](https://github.com/MindorksOpenSource/RxJava3-Android-Examples)
-## Kotlin-Coroutines-Android-Examples - [Check here](https://github.com/MindorksOpenSource/Kotlin-Coroutines-Android-Examples)
+### How to use RxJava 2 in Android Application
+### How to migrate from RxJava 1.0 to RxJava 2.0
 
 ### This project is for : 
 * who is migrating to RxJava 2 
 * or just started with RxJava.
 
+## [My Personal Blog - amitshekhar.me](https://amitshekhar.me/blog) - High-quality content to learn Android concepts.
+
 ### Just Build the project and start learning RxJava by examples.
 
 RxJava 2.0 has been completely rewritten from scratch on top of the Reactive-Streams specification. The specification itself has evolved out of RxJava 1.x and provides a common baseline for reactive systems and libraries.

From 1cb52efcf8f381eb3b976e2ea388e38fa0b72dd6 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 3 Oct 2022 11:18:32 +0530
Subject: [PATCH 127/137] Update README.md

---
 README.md | 162 ------------------------------------------------------
 1 file changed, 162 deletions(-)

diff --git a/README.md b/README.md
index c8565e6..1995538 100644
--- a/README.md
+++ b/README.md
@@ -1,167 +1,5 @@
 <img src=https://raw.githubusercontent.com/amitshekhariitbhu/RxJava2-Android-Samples/master/assets/rxjava2.png >
 
-# Learning RxJava 2 for Android by example
 
-[![Mindorks](https://img.shields.io/badge/mindorks-opensource-blue.svg)](https://mindorks.com/open-source-projects)
-[![Mindorks Community](https://img.shields.io/badge/join-community-blue.svg)](https://mindorks.com/join-community)
-[![Mindorks Android Store](https://img.shields.io/badge/Mindorks%20Android%20Store-RxJava2%20Android%20Samples-blue.svg?style=flat)](https://mindorks.com/android/store)
-[![Open Source Love](https://badges.frapsoft.com/os/v1/open-source.svg?v=102)](https://opensource.org/licenses/Apache-2.0)
-[![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/LICENSE)
-
-
-### How to use RxJava 2 in Android Application
-### How to migrate from RxJava 1.0 to RxJava 2.0
-
-### This project is for : 
-* who is migrating to RxJava 2 
-* or just started with RxJava.
-
-## [My Personal Blog - amitshekhar.me](https://amitshekhar.me/blog) - High-quality content to learn Android concepts.
-
-### Just Build the project and start learning RxJava by examples.
-
-RxJava 2.0 has been completely rewritten from scratch on top of the Reactive-Streams specification. The specification itself has evolved out of RxJava 1.x and provides a common baseline for reactive systems and libraries.
-
-Because Reactive-Streams has a different architecture, it mandates changes to some well known RxJava types.
-
-
-# Migration From RxJava 1.0 to RxJava 2.0
-
-To allow having RxJava 1 and RxJava 2 side-by-side, RxJava 2 is under the maven coordinates 
-io.reactivex.rxjava2:rxjava:2.x.y and classes are accessible below io.reactivex.
-
-Users switching from 1.x to 2.x have to re-organize their imports, but carefully.
-
-### Using RxJava 2.0 Library in your application
-
-Add this in your build.gradle
-```groovy
-compile 'io.reactivex.rxjava2:rxjava:2.2.2'
-```
-If you are using RxAndroid also, then add the following
-```groovy
-compile 'io.reactivex.rxjava2:rxandroid:2.1.0'
-```
-
-# RxJava 2 Examples present in this sample project
-
-* RxJava 2.0 Example using `CompositeDisposable` as `CompositeSubscription` and `Subscription` have
-been removed.
-
-* RxJava 2 Example using `Flowable`.
-
-* RxJava 2 Example using `SingleObserver`, `CompletableObserver`.
-
-* RxJava 2 Example using RxJava2 operators such as `map, zip, take, reduce, flatMap, filter, buffer, skip, merge, concat, replay`, and much more:
-
-* RxJava 2 Android Samples using `Function` as `Func1` has been removed.
-
-* RxJava 2 Android Samples  using `BiFunction` as `Func2` has been removed.
-
-* And many others android examples
-
-# Quick Look on few changes done in RxJava2 over RxJava1
-
-RxJava1 -> RxJava2
-
-* `onCompleted` -> `onComplete` - without the trailing d
-* `Func1` -> `Function`
-* `Func2` -> `BiFunction`
-* `CompositeSubscription` -> `CompositeDisposable`
-* `limit` operator has been removed - Use `take` in RxJava2
-* and much more.
-
-# Operators :
-* `Map` -> transform the items emitted by an Observable by applying a function to each item
-* `Zip` -> combine the emissions of multiple Observables together via a specified function and emit single items for each combination based on the results of this function
-* `Filter` -> emit only those items from an Observable that pass a predicate test
-* `FlatMap` -> transform the items emitted by an Observable into Observables, then flatten the emissions from those into a single Observable
-* `Take` -> emit only the first n items emitted by an Observable
-* `Reduce` -> apply a function to each item emitted by an Observable, sequentially, and emit the final value
-* `Skip` -> suppress the first n items emitted by an Observable
-* `Buffer` -> periodically gather items emitted by an Observable into bundles and emit these bundles rather than emitting the items one at a time
-* `Concat` -> emit the emissions from two or more Observables without interleaving them
-* `Replay` -> ensure that all observers see the same sequence of emitted items, even if they subscribe after the Observable has begun emitting items
-* `Merge` -> combine multiple Observables into one by merging their emissions
-* `SwitchMap` -> transform the items emitted by an Observable into Observables, and mirror those items emitted by the most-recently transformed Observable
-
-
-# Highlights of the examples :
-
-* [DisposableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java) - Using `CompositeDisposable`
-* [FlowableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java) - Using `Flowable` and `reduce` operator
-* [SingleObserverExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java) - Using `SingleObserver`
-* [CompletableObserverActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java) - Using `CompletableObserver`
-* [MapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java) - Using `map` Operator
-* [ZipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java) - Using `zip` Operator, [Blog for reference](https://blog.mindorks.com/understanding-rxjava-zip-operator-with-example)
-* [BufferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java) - Using `buffer` Operator
-* [TakeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java) - Using `take` Operator
-* [ReduceExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java) - Using `reduce` Operator
-* [FilterExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java) - Using `filter` Operator
-* [SkipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java) - Using `skip` Operator
-* [ReplayExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java) - Using `replay` Operator
-* [ConcatExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java) - Using `concat` Operator
-* [MergeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java) - Using `merge` Operator
-* [DeferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java) - Using `defer` Observable
-* [SwitchMapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java) - Using `switchMap` Observable
-* [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java) - Using `Interval`
-* [RxBusActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java) - RxBus, RxJava2Bus, EventBus, RxEventBus, [Blog for reference](https://blog.mindorks.com/implementing-eventbus-with-rxjava-rxbus-e6c940a94bd8)
-* [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView
-* [ComposeOperatorExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java) - Compose operator for reusable
-* [Search Implementation](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java) - Using `debounce`, `switchMap`, `distinctUntilChanged`, [Blog for reference](https://blog.mindorks.com/implement-search-using-rxjava-operators-c8882b64fe1d)
-* [Implement Caching Using RxJava Operators](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java) - Using `concat`, `firstElement`, [Blog for reference](https://blog.mindorks.com/implement-caching-in-android-using-rxjava-operators)
-* [PublishSubjectExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java)
-
-### TODO 
-
-* Many examples are to be added 
-
-### Find this project useful ? :heart:
-* Support it by clicking the :star: button on the upper right of this page. :v:
-
-### Check out an awesome MVP architecture based project which uses RxJava2, Dagger2.
-* [Android-MVP-Architecture](https://github.com/MindorksOpenSource/android-mvp-architecture)
-
-### Check out an awesome Kotlin MVP architecture based project which uses RxJava2, Dagger2.
-* [Android-Kotlin-MVP-Architecture](https://github.com/MindorksOpenSource/android-kotlin-mvp-architecture)
-
-### Check out an awesome library for fast and simple networking in Android.
-* [Fast Android Networking Library](https://github.com/amitshekhariitbhu/Fast-Android-Networking)
-
-### Another awesome library for debugging databases and shared preferences.
-* [Android Debug Database](https://github.com/amitshekhariitbhu/Android-Debug-Database)
-
-
-### Learn to build a ride-sharing Android app like Uber, Lyft.
-* [Check here](https://github.com/MindorksOpenSource/ridesharing-uber-lyft-app)
-
-### [Check out Mindorks awesome open source projects here](https://mindorks.com/open-source-projects)
-
-### Contact - Let's become friend
-- [Twitter](https://twitter.com/amitiitbhu)
-- [Github](https://github.com/amitshekhariitbhu)
-- [Medium](https://medium.com/@amitshekhar)
-- [Facebook](https://www.facebook.com/amit.shekhar.iitbhu)
-
-### License
-```
-   Copyright (C) 2016 Amit Shekhar
-   Copyright (C) 2011 Android Open Source Project
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-```
-
-### Contributing to RxJava 2 Android Samples
-Just make pull request. You are in!
 
  

From 21f6e7f465544b229f8bc44200c5da52b68b81c0 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 3 Oct 2022 11:23:51 +0530
Subject: [PATCH 128/137] Update README.md

---
 README.md | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)

diff --git a/README.md b/README.md
index 1995538..79aff5f 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,103 @@
 <img src=https://raw.githubusercontent.com/amitshekhariitbhu/RxJava2-Android-Samples/master/assets/rxjava2.png >
 
+# Learning RxJava 2 for Android by example
 
+### This project is for : 
+* who is migrating to RxJava 2 
+* or just started with RxJava.
 
+## [My Personal Blog - amitshekhar.me](https://amitshekhar.me/blog) - High-quality content to learn Android concepts.
+
+### Just Build the project and start learning RxJava by examples.
+
+RxJava 2.0 has been completely rewritten from scratch on top of the Reactive-Streams specification. The specification itself has evolved out of RxJava 1.x and provides a common baseline for reactive systems and libraries.
+
+### Using RxJava 2.0 Library in your application
+
+Add this in your build.gradle
+```groovy
+compile 'io.reactivex.rxjava2:rxjava:X.X.X'
+```
+If you are using RxAndroid also, then add the following
+```groovy
+compile 'io.reactivex.rxjava2:rxandroid:X.X.X'
+```
+
+# RxJava 2 Operators Examples present in this sample project:
+
+* `Map` -> transform the items emitted by an Observable by applying a function to each item
+* `Zip` -> combine the emissions of multiple Observables together via a specified function and emit single items for each combination based on the results of this function
+* `Filter` -> emit only those items from an Observable that pass a predicate test
+* `FlatMap` -> transform the items emitted by an Observable into Observables, then flatten the emissions from those into a single Observable
+* `Take` -> emit only the first n items emitted by an Observable. [Blog for reference](https://amitshekhar.me/blog/rxjava-interval-operator)
+* `Reduce` -> apply a function to each item emitted by an Observable, sequentially, and emit the final value
+* `Skip` -> suppress the first n items emitted by an Observable
+* `Buffer` -> periodically gather items emitted by an Observable into bundles and emit these bundles rather than emitting the items one at a time
+* `Concat` -> emit the emissions from two or more Observables without interleaving them
+* `Replay` -> ensure that all observers see the same sequence of emitted items, even if they subscribe after the Observable has begun emitting items
+* `Merge` -> combine multiple Observables into one by merging their emissions
+* `SwitchMap` -> transform the items emitted by an Observable into Observables, and mirror those items emitted by the most-recently transformed Observable
+
+
+# Highlights of the examples :
+
+* [DisposableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java) - Using `CompositeDisposable`
+* [FlowableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java) - Using `Flowable` and `reduce` operator
+* [SingleObserverExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java) - Using `SingleObserver`
+* [CompletableObserverActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java) - Using `CompletableObserver`
+* [MapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java) - Using `map` Operator
+* [ZipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java) - Using `zip` Operator
+* [BufferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java) - Using `buffer` Operator
+* [TakeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java) - Using `take` Operator. [Blog for reference](https://amitshekhar.me/blog/rxjava-interval-operator)
+* [ReduceExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java) - Using `reduce` Operator
+* [FilterExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java) - Using `filter` Operator
+* [SkipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java) - Using `skip` Operator
+* [ReplayExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java) - Using `replay` Operator
+* [ConcatExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java) - Using `concat` Operator
+* [MergeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java) - Using `merge` Operator
+* [DeferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java) - Using `defer` Observable
+* [SwitchMapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java) - Using `switchMap` Observable
+* [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java) - Using `Interval`. [Blog for reference](https://amitshekhar.me/blog/rxjava-interval-operator)
+* [RxBusActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java) - RxBus, RxJava2Bus, EventBus, RxEventBus
+* [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView
+* [ComposeOperatorExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java) - Compose operator for reusable
+* [Search Implementation](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java) - Using `debounce`, `switchMap`, `distinctUntilChanged`
+* [Implement Caching Using RxJava Operators](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java) - Using `concat`, `firstElement`
+* [PublishSubjectExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java)
+
+### Find this project useful ? :heart:
+* Support it by clicking the :star: button on the upper right of this page. :v:
+
+Thanks
+
+[**Amit Shekhar**](https://amitshekhar.me)
+
+You can connect with me on:
+
+- [Twitter](https://twitter.com/amitiitbhu)
+- [LinkedIn](https://www.linkedin.com/in/amit-shekhar-iitbhu)
+- [GitHub](https://github.com/amitshekhariitbhu)
+- [Facebook](https://www.facebook.com/amit.shekhar.iitbhu)
+
+[**Read all of my blogs here.**](https://amitshekhar.me/blog)
+
+### License
+```
+   Copyright (C) 2022 Amit Shekhar
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+```
+
+### Contributing to RxJava 2 Android Samples
+Just make pull request. You are in!
  

From 3652b494c249157a4da875846352ecc2d9177f28 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Mon, 3 Oct 2022 13:57:09 +0530
Subject: [PATCH 129/137] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 79aff5f..a31c1ec 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ compile 'io.reactivex.rxjava2:rxandroid:X.X.X'
 
 # Highlights of the examples :
 
-* [DisposableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java) - Using `CompositeDisposable`
+* [DisposableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java) - Using `CompositeDisposable`. [Blog for reference](https://amitshekhar.me/blog/dispose-vs-clear-compositedisposable-rxjava)
 * [FlowableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java) - Using `Flowable` and `reduce` operator
 * [SingleObserverExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java) - Using `SingleObserver`
 * [CompletableObserverActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java) - Using `CompletableObserver`

From 05a5123c8ae5ca49bc26be8949cabc8c30e328e0 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 4 Oct 2022 18:44:23 +0530
Subject: [PATCH 130/137] Update README.md

---
 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index a31c1ec..500d726 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ compile 'io.reactivex.rxjava2:rxandroid:X.X.X'
 * `Reduce` -> apply a function to each item emitted by an Observable, sequentially, and emit the final value
 * `Skip` -> suppress the first n items emitted by an Observable
 * `Buffer` -> periodically gather items emitted by an Observable into bundles and emit these bundles rather than emitting the items one at a time
-* `Concat` -> emit the emissions from two or more Observables without interleaving them
+* `Concat` -> emit the emissions from two or more Observables without interleaving them. [Blog for reference](https://amitshekhar.me/blog/rxjava-concat-operator)
 * `Replay` -> ensure that all observers see the same sequence of emitted items, even if they subscribe after the Observable has begun emitting items
 * `Merge` -> combine multiple Observables into one by merging their emissions
 * `SwitchMap` -> transform the items emitted by an Observable into Observables, and mirror those items emitted by the most-recently transformed Observable
@@ -53,7 +53,7 @@ compile 'io.reactivex.rxjava2:rxandroid:X.X.X'
 * [FilterExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java) - Using `filter` Operator
 * [SkipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java) - Using `skip` Operator
 * [ReplayExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java) - Using `replay` Operator
-* [ConcatExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java) - Using `concat` Operator
+* [ConcatExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java) - Using `concat` Operator. [Blog for reference](https://amitshekhar.me/blog/rxjava-concat-operator)
 * [MergeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java) - Using `merge` Operator
 * [DeferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java) - Using `defer` Observable
 * [SwitchMapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java) - Using `switchMap` Observable

From 60994e428577e8a4aef3bc445a120dda8c2dc2df Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 11 Oct 2022 11:49:53 +0530
Subject: [PATCH 131/137] Update README.md

---
 README.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 500d726..c30894d 100644
--- a/README.md
+++ b/README.md
@@ -25,10 +25,10 @@ compile 'io.reactivex.rxjava2:rxandroid:X.X.X'
 
 # RxJava 2 Operators Examples present in this sample project:
 
-* `Map` -> transform the items emitted by an Observable by applying a function to each item
+* `Map` -> transform the items emitted by an Observable by applying a function to each item. Blog: [RxJava Operator Map vs FlatMap](https://amitshekhar.me/blog/rxjava-map-vs-flatmap)
 * `Zip` -> combine the emissions of multiple Observables together via a specified function and emit single items for each combination based on the results of this function
 * `Filter` -> emit only those items from an Observable that pass a predicate test
-* `FlatMap` -> transform the items emitted by an Observable into Observables, then flatten the emissions from those into a single Observable
+* `FlatMap` -> transform the items emitted by an Observable into Observables, then flatten the emissions from those into a single Observable. Blog: [RxJava Operator Map vs FlatMap](https://amitshekhar.me/blog/rxjava-map-vs-flatmap)
 * `Take` -> emit only the first n items emitted by an Observable. [Blog for reference](https://amitshekhar.me/blog/rxjava-interval-operator)
 * `Reduce` -> apply a function to each item emitted by an Observable, sequentially, and emit the final value
 * `Skip` -> suppress the first n items emitted by an Observable
@@ -45,7 +45,7 @@ compile 'io.reactivex.rxjava2:rxandroid:X.X.X'
 * [FlowableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java) - Using `Flowable` and `reduce` operator
 * [SingleObserverExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java) - Using `SingleObserver`
 * [CompletableObserverActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java) - Using `CompletableObserver`
-* [MapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java) - Using `map` Operator
+* [MapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java) - Using `map` Operator. Blog: [RxJava Operator Map vs FlatMap](https://amitshekhar.me/blog/rxjava-map-vs-flatmap)
 * [ZipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java) - Using `zip` Operator
 * [BufferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java) - Using `buffer` Operator
 * [TakeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java) - Using `take` Operator. [Blog for reference](https://amitshekhar.me/blog/rxjava-interval-operator)

From 0e1c933484d84ef62eacd26475b15939428f459f Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 11 Oct 2022 19:05:59 +0530
Subject: [PATCH 132/137] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index c30894d..8af27ca 100644
--- a/README.md
+++ b/README.md
@@ -59,7 +59,7 @@ compile 'io.reactivex.rxjava2:rxandroid:X.X.X'
 * [SwitchMapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java) - Using `switchMap` Observable
 * [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java) - Using `Interval`. [Blog for reference](https://amitshekhar.me/blog/rxjava-interval-operator)
 * [RxBusActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java) - RxBus, RxJava2Bus, EventBus, RxEventBus
-* [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView
+* [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView. Blog: [Pagination In RecyclerView Using RxJava Operators](https://amitshekhar.me/blog/pagination-in-recyclerview-using-rxjava-operators)
 * [ComposeOperatorExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java) - Compose operator for reusable
 * [Search Implementation](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java) - Using `debounce`, `switchMap`, `distinctUntilChanged`
 * [Implement Caching Using RxJava Operators](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java) - Using `concat`, `firstElement`

From a7d4dc79e649c41734cb17cd2f8784d6b43badb3 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Wed, 9 Nov 2022 16:15:23 +0530
Subject: [PATCH 133/137] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 8af27ca..eceb305 100644
--- a/README.md
+++ b/README.md
@@ -63,7 +63,7 @@ compile 'io.reactivex.rxjava2:rxandroid:X.X.X'
 * [ComposeOperatorExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java) - Compose operator for reusable
 * [Search Implementation](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java) - Using `debounce`, `switchMap`, `distinctUntilChanged`
 * [Implement Caching Using RxJava Operators](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java) - Using `concat`, `firstElement`
-* [PublishSubjectExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java)
+* [PublishSubjectExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java). Blog: [RxJava Subject - Publish, Replay, Behavior, and Async](https://amitshekhar.me/blog/rxjava-subject-publish-replay-behavior-async)
 
 ### Find this project useful ? :heart:
 * Support it by clicking the :star: button on the upper right of this page. :v:

From 32432ed7b3672a73e3a08116a34e3af7764fc55f Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Wed, 18 Jan 2023 13:42:31 +0530
Subject: [PATCH 134/137] Update README.md

---
 README.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/README.md b/README.md
index eceb305..fd6eca3 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,17 @@
 * who is migrating to RxJava 2 
 * or just started with RxJava.
 
+## About me
+
+Hi, I am [**Amit Shekhar**](https://amitshekhar.me), I have mentored many developers, and their efforts landed them high-paying tech jobs, helped many tech companies in solving their unique problems, and created many open-source libraries being used by top companies. I am passionate about sharing knowledge through open-source, blogs, and videos.
+
+You can connect with me on:
+
+- [Twitter](https://twitter.com/amitiitbhu)
+- [YouTube](https://www.youtube.com/@amitshekhar)
+- [LinkedIn](https://www.linkedin.com/in/amit-shekhar-iitbhu)
+- [GitHub](https://github.com/amitshekhariitbhu)
+
 ## [My Personal Blog - amitshekhar.me](https://amitshekhar.me/blog) - High-quality content to learn Android concepts.
 
 ### Just Build the project and start learning RxJava by examples.

From a22bb87c2bb74e96bb096f07ad97f863e0c6c7c8 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Sun, 7 Jul 2024 09:33:27 +0530
Subject: [PATCH 135/137] Update README.md

---
 README.md | 33 +++++++++++++++++----------------
 1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/README.md b/README.md
index fd6eca3..7d13459 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 
 ## About me
 
-Hi, I am [**Amit Shekhar**](https://amitshekhar.me), I have mentored many developers, and their efforts landed them high-paying tech jobs, helped many tech companies in solving their unique problems, and created many open-source libraries being used by top companies. I am passionate about sharing knowledge through open-source, blogs, and videos.
+Hi, I am Amit Shekhar, Co-Founder @ [Outcome School](https://outcomeschool.com) • IIT 2010-14 • I have taught and mentored many developers, and their efforts landed them high-paying tech jobs, helped many tech companies in solving their unique problems, and created many open-source libraries being used by top companies. I am passionate about sharing knowledge through open-source, blogs, and videos.
 
 You can connect with me on:
 
@@ -17,7 +17,7 @@ You can connect with me on:
 - [LinkedIn](https://www.linkedin.com/in/amit-shekhar-iitbhu)
 - [GitHub](https://github.com/amitshekhariitbhu)
 
-## [My Personal Blog - amitshekhar.me](https://amitshekhar.me/blog) - High-quality content to learn Android concepts.
+## Join **Outcome School** and get high paying tech job: [Outcome School](https://outcomeschool.com)
 
 ### Just Build the project and start learning RxJava by examples.
 
@@ -36,15 +36,15 @@ compile 'io.reactivex.rxjava2:rxandroid:X.X.X'
 
 # RxJava 2 Operators Examples present in this sample project:
 
-* `Map` -> transform the items emitted by an Observable by applying a function to each item. Blog: [RxJava Operator Map vs FlatMap](https://amitshekhar.me/blog/rxjava-map-vs-flatmap)
+* `Map` -> transform the items emitted by an Observable by applying a function to each item. Blog: [RxJava Operator Map vs FlatMap](https://outcomeschool.com/blog/rxjava-map-vs-flatmap)
 * `Zip` -> combine the emissions of multiple Observables together via a specified function and emit single items for each combination based on the results of this function
 * `Filter` -> emit only those items from an Observable that pass a predicate test
-* `FlatMap` -> transform the items emitted by an Observable into Observables, then flatten the emissions from those into a single Observable. Blog: [RxJava Operator Map vs FlatMap](https://amitshekhar.me/blog/rxjava-map-vs-flatmap)
-* `Take` -> emit only the first n items emitted by an Observable. [Blog for reference](https://amitshekhar.me/blog/rxjava-interval-operator)
+* `FlatMap` -> transform the items emitted by an Observable into Observables, then flatten the emissions from those into a single Observable. Blog: [RxJava Operator Map vs FlatMap](https://outcomeschool.com/blog/rxjava-map-vs-flatmap)
+* `Take` -> emit only the first n items emitted by an Observable. [Blog for reference](https://outcomeschool.com/blog/rxjava-interval-operator)
 * `Reduce` -> apply a function to each item emitted by an Observable, sequentially, and emit the final value
 * `Skip` -> suppress the first n items emitted by an Observable
 * `Buffer` -> periodically gather items emitted by an Observable into bundles and emit these bundles rather than emitting the items one at a time
-* `Concat` -> emit the emissions from two or more Observables without interleaving them. [Blog for reference](https://amitshekhar.me/blog/rxjava-concat-operator)
+* `Concat` -> emit the emissions from two or more Observables without interleaving them. [Blog for reference](https://outcomeschool.com/blog/rxjava-concat-operator)
 * `Replay` -> ensure that all observers see the same sequence of emitted items, even if they subscribe after the Observable has begun emitting items
 * `Merge` -> combine multiple Observables into one by merging their emissions
 * `SwitchMap` -> transform the items emitted by an Observable into Observables, and mirror those items emitted by the most-recently transformed Observable
@@ -52,36 +52,37 @@ compile 'io.reactivex.rxjava2:rxandroid:X.X.X'
 
 # Highlights of the examples :
 
-* [DisposableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java) - Using `CompositeDisposable`. [Blog for reference](https://amitshekhar.me/blog/dispose-vs-clear-compositedisposable-rxjava)
+* [DisposableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DisposableExampleActivity.java) - Using `CompositeDisposable`. [Blog for reference](https://outcomeschool.com/blog/dispose-vs-clear-compositedisposable-rxjava)
 * [FlowableExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/FlowableExampleActivity.java) - Using `Flowable` and `reduce` operator
 * [SingleObserverExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SingleObserverExampleActivity.java) - Using `SingleObserver`
 * [CompletableObserverActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/CompletableObserverExampleActivity.java) - Using `CompletableObserver`
-* [MapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java) - Using `map` Operator. Blog: [RxJava Operator Map vs FlatMap](https://amitshekhar.me/blog/rxjava-map-vs-flatmap)
+* [MapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MapExampleActivity.java) - Using `map` Operator. Blog: [RxJava Operator Map vs FlatMap](https://outcomeschool.com/blog/rxjava-map-vs-flatmap)
 * [ZipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ZipExampleActivity.java) - Using `zip` Operator
 * [BufferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/BufferExampleActivity.java) - Using `buffer` Operator
-* [TakeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java) - Using `take` Operator. [Blog for reference](https://amitshekhar.me/blog/rxjava-interval-operator)
+* [TakeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/TakeExampleActivity.java) - Using `take` Operator. [Blog for reference](https://outcomeschool.com/blog/rxjava-interval-operator)
 * [ReduceExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReduceExampleActivity.java) - Using `reduce` Operator
 * [FilterExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/FilterExampleActivity.java) - Using `filter` Operator
 * [SkipExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SkipExampleActivity.java) - Using `skip` Operator
 * [ReplayExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ReplayExampleActivity.java) - Using `replay` Operator
-* [ConcatExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java) - Using `concat` Operator. [Blog for reference](https://amitshekhar.me/blog/rxjava-concat-operator)
+* [ConcatExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/ConcatExampleActivity.java) - Using `concat` Operator. [Blog for reference](https://outcomeschool.com/blog/rxjava-concat-operator)
 * [MergeExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/MergeExampleActivity.java) - Using `merge` Operator
 * [DeferExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/DeferExampleActivity.java) - Using `defer` Observable
 * [SwitchMapExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/SwitchMapExampleActivity.java) - Using `switchMap` Observable
-* [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java) - Using `Interval`. [Blog for reference](https://amitshekhar.me/blog/rxjava-interval-operator)
+* [IntervalExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/IntervalExampleActivity.java) - Using `Interval`. [Blog for reference](https://outcomeschool.com/blog/rxjava-interval-operator)
 * [RxBusActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/rxbus/RxBusActivity.java) - RxBus, RxJava2Bus, EventBus, RxEventBus
-* [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView. Blog: [Pagination In RecyclerView Using RxJava Operators](https://amitshekhar.me/blog/pagination-in-recyclerview-using-rxjava-operators)
+* [PaginationActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/pagination/PaginationActivity.java) - Pagination for loadMore in RecyclerView. Blog: [Pagination In RecyclerView Using RxJava Operators](https://outcomeschool.com/blog/pagination-in-recyclerview-using-rxjava-operators)
 * [ComposeOperatorExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/compose/ComposeOperatorExampleActivity.java) - Compose operator for reusable
 * [Search Implementation](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/search/SearchActivity.java) - Using `debounce`, `switchMap`, `distinctUntilChanged`
 * [Implement Caching Using RxJava Operators](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/cache/CacheExampleActivity.java) - Using `concat`, `firstElement`
-* [PublishSubjectExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java). Blog: [RxJava Subject - Publish, Replay, Behavior, and Async](https://amitshekhar.me/blog/rxjava-subject-publish-replay-behavior-async)
+* [PublishSubjectExampleActivity](https://github.com/amitshekhariitbhu/RxJava2-Android-Samples/blob/master/app/src/main/java/com/rxjava2/android/samples/ui/operators/PublishSubjectExampleActivity.java). Blog: [RxJava Subject - Publish, Replay, Behavior, and Async](https://outcomeschool.com/blog/rxjava-subject-publish-replay-behavior-async)
 
 ### Find this project useful ? :heart:
 * Support it by clicking the :star: button on the upper right of this page. :v:
 
 Thanks
 
-[**Amit Shekhar**](https://amitshekhar.me)
+**Amit Shekhar**\
+Co-Founder @ [Outcome School](https://outcomeschool.com)
 
 You can connect with me on:
 
@@ -90,11 +91,11 @@ You can connect with me on:
 - [GitHub](https://github.com/amitshekhariitbhu)
 - [Facebook](https://www.facebook.com/amit.shekhar.iitbhu)
 
-[**Read all of my blogs here.**](https://amitshekhar.me/blog)
+[**Read all of our blogs here.**](https://outcomeschool.com/blog)
 
 ### License
 ```
-   Copyright (C) 2022 Amit Shekhar
+   Copyright (C) 2024 Amit Shekhar
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

From feaaf21a088d9cd732b21b2657b5df4676d74fd1 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Tue, 12 Aug 2025 21:43:15 +0530
Subject: [PATCH 136/137] Delete .github directory

---
 .github/FUNDING.yml | 13 -------------
 1 file changed, 13 deletions(-)
 delete mode 100644 .github/FUNDING.yml

diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
deleted file mode 100644
index 25c1f0e..0000000
--- a/.github/FUNDING.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-# These are supported funding model platforms
-
-github: [amitshekhariitbhu]
-patreon: # Replace with a single Patreon username
-open_collective: # Replace with a single Open Collective username
-ko_fi: # Replace with a single Ko-fi username
-tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
-community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
-liberapay: # Replace with a single Liberapay username
-issuehunt: # Replace with a single IssueHunt username
-otechie: # Replace with a single Otechie username
-lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
-custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']

From 74693e26ef44c59368b48a77d1600b1ff019b7a1 Mon Sep 17 00:00:00 2001
From: AMIT SHEKHAR <amit.shekhar.iitbhu@gmail.com>
Date: Wed, 28 Jan 2026 14:56:05 +0530
Subject: [PATCH 137/137] Update README.md

---
 README.md | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 7d13459..8aa4e01 100644
--- a/README.md
+++ b/README.md
@@ -8,16 +8,27 @@
 
 ## About me
 
-Hi, I am Amit Shekhar, Co-Founder @ [Outcome School](https://outcomeschool.com) • IIT 2010-14 • I have taught and mentored many developers, and their efforts landed them high-paying tech jobs, helped many tech companies in solving their unique problems, and created many open-source libraries being used by top companies. I am passionate about sharing knowledge through open-source, blogs, and videos.
+Hi, I am Amit Shekhar, Founder @ [Outcome School](https://outcomeschool.com) • IIT 2010-14 • I have taught and mentored many developers, and their efforts landed them high-paying tech jobs, helped many tech companies in solving their unique problems, and created many open-source libraries being used by top companies. I am passionate about sharing knowledge through open-source, blogs, and videos.
 
-You can connect with me on:
+### Follow Amit Shekhar
 
-- [Twitter](https://twitter.com/amitiitbhu)
-- [YouTube](https://www.youtube.com/@amitshekhar)
+- [X/Twitter](https://twitter.com/amitiitbhu)
 - [LinkedIn](https://www.linkedin.com/in/amit-shekhar-iitbhu)
 - [GitHub](https://github.com/amitshekhariitbhu)
 
-## Join **Outcome School** and get high paying tech job: [Outcome School](https://outcomeschool.com)
+### Follow Outcome School
+
+- [YouTube](https://youtube.com/@OutcomeSchool)
+- [X/Twitter](https://x.com/outcome_school)
+- [LinkedIn](https://www.linkedin.com/company/outcomeschool)
+- [GitHub](http://github.com/OutcomeSchool)
+
+## I teach at Outcome School
+
+- AI and Machine Learning
+- Android
+
+Join Outcome School and get a high-paying tech job: [Outcome School](https://outcomeschool.com)
 
 ### Just Build the project and start learning RxJava by examples.