如何停止在android中播放先前的铃声

Question

我正试着处理铃声通知。现在，我正在播放铃声按一下按钮。当我在第一次尝试后单击按钮时，我需要停止先前的铃声，并启动新的铃声。但我做不到。

这是我的代码：

RingtoneManager  manager = new RingtoneManager(this);
Ringtone ringtone = manager.getRingtone(getApplicationContext(), uri);
            manager.setStopPreviousRingtone(true);
            ringtone.play();
            final Handler handler = new Handler();
            handler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    if (ringtone.isPlaying())
                        ringtone.stop();
                }
            }, 30000);

但这不管用。

这是我的完整代码：

RingtoneManager manager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    pickMediaButton = (Button) findViewById(R.id.pickMediaButton);
    manager = new RingtoneManager(this);
    manager.setStopPreviousRingtone(true);
    pickMediaButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);
            intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_NOTIFICATION);
            intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "Select Tone");
            intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, (Uri) null);
            startActivityForResult(intent, 5);

        }
    });

}

@SuppressWarnings("static-access")
@Override
protected void onActivityResult(final int requestCode,final int resultCode, final Intent intent) {

    String chosenRingtone = null;

    if (resultCode == Activity.RESULT_OK && requestCode == 5)
    {
        Uri uri = intent.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);

        if (uri != null)
        {
            chosenRingtone = uri.toString();
            Ringtone ringtone = manager.getRingtone(getApplicationContext(), uri);

            ringtone.play();
            /*  final Handler handler = new Handler();
            handler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    if (ringtone.isPlaying())
                        ringtone.stop();
                }
            }, 30000);*/
        }
        else
        {
            chosenRingtone = null;
        }
    }       

    Toast.makeText(MainActivity.this, chosenRingtone+" ", Toast.LENGTH_LONG).show();
}

Answer 1

没有理由在用例中使用RingtoneManager实例。

只需通过RingtoneManager.getRingtone(Context，Uri)获得铃声，并将其设置为一个成员。在获得新的铃声之前，请检查您以前是否启动了铃声，并停止它，以防它在播放。

private Ringtone ringtone;

public void method(...) {
    if (ringtone != null) ringtone.stop();
    ringtone = RingtoneManager.getRingtone(this, uri);
    ringtone.play();
}