AudioManager audioManager = (AudioManager) getContext().getSystemService(AUDIO_SERVICE);
    audioManager.setMode(AudioManager.ROUTE_EARPIECE);
    audioManager.setSpeakerphoneOn(false);

NotificationCompat.Builder mBuilder =
            new NotificationCompat.Builder(context)
                    .setSmallIcon(R.drawable.newlogo)
                    .setLargeIcon(largeIcon)
                    .setSound(uri)
                    .setContentTitle(notificationHeading)
                    .setContentText(notificationBody)
                    .setPriority(Notification.PRIORITY_HIGH).setVibrate(v);
    notificationManager.notify(1,mBuilder.build());

AUDIO_STREAM_ENFORCED_AUDIBLE = 7, /* Sounds that cannot be muted by user
                                    * and must be routed to speaker
                                    */
AUDIO_STREAM_TTS              = 9,  /* Transmitted Through Speaker.
                                     * Plays over speaker only, silent on other devices.
                                     */