onStart.java

@Override
protected void onStart() {
    super.onStart();

    // Retrieve default ringtone file URI
    Uri myUri = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_RINGTONE);

    // Set up MediaPlayer asynchronously
    mediaPlayer = new MediaPlayer();
    class Listener implements MediaPlayer.OnPreparedListener {
        @Override
        public void onPrepared(MediaPlayer mp) {
            mp.start();
        }
    }
    mediaPlayer.setOnPreparedListener(new Listener());
     mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    try {
        mediaPlayer.setDataSource(getApplicationContext(), myUri);
    } catch (IOException e) {
        e.printStackTrace();
    }
    mediaPlayer.prepareAsync();
     // Instruct the half-asleep user
    info.setText("Snap a " + object + "!");
}