Android - 播放notification sound

如果要在程式中播放notification 預設的音效，程式如下:

public class Main extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Uri mySoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        RingtoneManager.getRingtone(this, mySoundUri ).play();
    }
}