Question

我正在尝试播放闹钟声但是我收到了这个错误，我听不到声音。它不会在应用程序或崩溃中造成任何问题，但没有声音。

03-13 00:35:01.138: D/MediaPlayer(2580): Couldn't open file on client side, trying server side
03-13 00:35:01.138: E/MediaPlayer(2580): Unable to create media player
03-13 00:35:01.138: I/alarmReceiver(2580): No audio file founded!

根据我的调试，此错误发生在此代码行运行之前：

mMediaPlayer.setDataSource(context, alert);

这不仅发生在模拟器中，也发生在真实设备中;我听不到任何声音。

这是我的代码：

playSound(this, getAlarmUri()); 

private void playSound(Context context, Uri alert) {        
    mMediaPlayer = new MediaPlayer();       
    try {           
        mMediaPlayer.reset();
        **mMediaPlayer.setDataSource(context, alert);**
        final AudioManager am = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);

        Log.i("getStreamVolume", am.getStreamVolume(AudioManager.STREAM_ALARM)+"");

        if (am.getStreamVolume(AudioManager.STREAM_ALARM) != 0) {
            mMediaPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
            mMediaPlayer.prepare();
            mMediaPlayer.start();
        }
    } catch (Exception e) {
        // TODO: handle exception
        Log.i("alarmReceiver", "No audio file founded!");
    }
}

private Uri getAlarmUri()
    {       
        Uri alert=RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
        if(alert==null)
        {
            alert= RingtoneManager.getDefaultUri((RingtoneManager.TYPE_NOTIFICATION));
            if(alert==null)
            {
                alert=RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
            }
        }
        Log.i("alert", alert.toString());
        return alert;
    }

Answer 1

尝试在重置媒体播放器之前设置数据源。
... mMediaPlayer = new MediaPlayer(); mMediaPlayer.setDataSource(context, alert); try { mMediaPlayer.reset(); ...

Answer 2

好的家伙我找到了解决问题的方法。

我在我的res文件夹下创建了原始文件夹，并将我的song.mp3放在那里

mMediaPlayer = new MediaPlayer(); 
    try {
        final AudioManager am = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
        mMediaPlayer = MediaPlayer.create(context, R.raw.song);
        mMediaPlayer.start();


    } catch (IllegalArgumentException e) {

        // TODO Auto-generated catch block

        e.printStackTrace();

    } catch (SecurityException e) {

        // TODO Auto-generated catch block

        e.printStackTrace();

    } catch (IllegalStateException e) {

        // TODO Auto-generated catch block

        e.printStackTrace();

    }

完成后，不要忘记停止并释放mediapleayr。

mMediaPlayer.stop();
mMediaPlayer.release();

Android媒体播放器不起作用

2 个答案: