mediaplayer无法运行android

Question

这是假设在设置通知时发出声音的功能

private void playRingtone() {
    AudioManager am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
    if (am.getRingerMode() == AudioManager.RINGER_MODE_NORMAL) {
        try {
            MediaPlayer mp = MediaPlayer.create(this, R.raw.notification_ringtone);
            mp.start();
        } catch (IllegalStateException e) {
            Log.d(TAG, "MediaPlayer problem");
            e.printStackTrace();
        }
    }
}

使用调试器一切顺利但没有播放声音。 WHY ???

Answer 1

    MediaPlayer  mediaPlayer = new MediaPlayer();

    try {
mediaPlayer.setDataSource("android.resource://YOURPACKAGE_NAME/raw/"+file anme);    
            mediaPlayer.prepare();
            mediaPlayer.start();
    }catch(Exceptions e){
    }