## Main Activity class ## import android.app.Activity; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Intent; import android.os.Bundle; import android.view.View; public class MainActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void createNotification(View view) { Intent i= new Intent(this,notificationreceiveractivity.class); PendingIntent pi=PendingIntent.getActivity(this, 0,i, 0); Notification not=new Notification.Builder(this) .setContentTitle("New mail from " + "test@gmail.com") .setConte...