Android Notification builder sound doesn't work

Question

I have tried many things suggested here, but nothing works for me. here is my source code:

Intent resultIntent = new Intent(this, MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, resultIntent,PendingIntent.FLAG_UPDATE_CURRENT);  
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("title")
.setContentText("Hello World!");
mBuilder.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION));
mBuilder.setContentIntent(contentIntent);
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(0, mBuilder.build());

The notification appears but no sound, any help ?

Answer 1

Set the default flags:

mBuilder.setDefaults(Notification.DEFAULT_SOUND|Notification.DEFAULT_LIGHTS|Notification.DEFAULT_VIBRATE);

Answer 2

Use notification.sound instead of mBuilder.setSound() solved my problem.

Here is the code -

Notification notification = mBuilder.build();
notification.sound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
mNotificationManager.notify(0, notification);