notification.sound = Uri.parse("android.resource://emad.app/raw/seven_chimes");

/*
 * Stay here until the chime sound is finished.
 */
   while (manager.isMusicActive()){
   }

MediaPlayer mp = MediaPlayer.create(this,Uri.parse("android.resource://emad.app/raw/seven_chimes"));

mp.setOnCompletionListener(new OnCompletionListener() {

            @Override
            public void onCompletion(MediaPlayer mp) {
                performOnEnd();
            }

            });

    mp.start();