[android help] Notification Not showing

Case study: I need a program that will add a notification at android. And when someone click on the notification it should lead them to my second activity.

I have established a code. It should be working. Dont know what am i missing.

My code structure.

java files:

MainActivity.java
NotificationReceiverActivity.java

Layout file:

activity_main.xml
result.xml

Code of those files:

MainActivity.java

    public class MainActivity extends Activity {



     @Override
     public void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

     }
     public void createNotification(View view) {
        // Prepare intent which is triggered if the
        // notification is selected
        Intent intent = new Intent(this, NotificationReceiverActivity.class);
        PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent, 0);

        String longText = "Hello Hello Hello";

        Notification n = new Notification.Builder(this)
                .setContentTitle("New mail from " + "test@gmail.com")
                .setContentText("Subject")
                .setContentIntent(pIntent).setAutoCancel(true)
                .setStyle(new Notification.BigTextStyle().bigText(longText))
                .build();

        NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        // Hide the notification after its selected

        notificationManager.notify(0, n);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}

NotificationReceiverActivity.java

public class NotificationReceiverActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.result);
}
}

activity_main.xml

 
 android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">

 

result.xml

 
 android:layout_width="match_parent" android:layout_height="match_parent">
    android:layout_width="wrap_content" android:layout_height="wrap_content"
    android:id="@+id/textView1">
 

AndroidManifest.xml

         package="com.example.notification"
        android:versionCode="1"
        android:versionName="1.0" >

                    android:minSdkVersion="16"
            android:targetSdkVersion="15" />

                    android:icon="@drawable/ic_launcher"
            android:label="@string/app_name"
            android:theme="@style/AppTheme" >
                            android:name=".MainActivity"
                android:label="@string/title_activity_main" >
                
                    

                    
                
            
            
            

        

 

.

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