怎么在Android应用中添加一个消息提示音功能

// 获得RingtoneManager对象 RingtoneManager manager = new RingtoneManager(this); // 设置RingtoneManager对象的类型为TYPE_NOTIFICATION，这样只会获取到notification的对应内容 manager.setType(RingtoneManager.TYPE_NOTIFICATION); Cursor cursor = manager.getCursor(); int num = cursor.getCount(); Log.i("tag", num + "消息音个数"); // 存储消息音名字的arrayList ArrayList<String> ringtoneList = new ArrayList<String>(); for (int i = 0; i < num; i++) {  //获取当前i的铃声信息  Ringtone ringtone = manager.getRingtone(i);  //获取当前i的uri，设置notification的自定义铃声要用到  Uri uri = manager.getRingtoneUri(i);  //获取到当前铃声的名字  String title = ringtone.getTitle(this);  ringtoneList.add(title); }