1.Create 1 folder named raw under yourApp/res/
2.Do copy and paste your ringtone in this folder
3.Write the below code when your application notify the notification.!
SoundPool sp = new SoundPool(5, AudioManager.STREAM_MUSIC, 0);
int iTmp = sp.load(context, R.raw.windows_8_notify, 1); // in 2nd param u have to pass your desire ringtone
sp.play(iTmp, 1, 1, 0, 0, 1);
MediaPlayer mPlayer = MediaPlayer.create(context, R.raw.windows_8_notify); // in 2nd param u have to pass your desire ringtone
//mPlayer.prepare();
mPlayer.start();