android - 如何在android中同时播放多个声音

Question

我尝试了以下代码，并且 3 个音符同时播放。该方法由单击按钮触发。然而，在下一次点击事件中，它只播放一个音符，应用程序崩溃。每次单击按钮时，我都想播放 3 个不同的音符。(我随机选择了那些)

    player = MediaPlayer.create(this, resIdFirstNote);
    player.start();

    player = MediaPlayer.create(this, resIdSecondNote);
    player.start();

    player = MediaPlayer.create(this, resIdThirdNote);
    player.start();

    player.release();

是播放器实例重载了吗？我应该以不同的方式释放它吗？
还是别的什么？

提前谢谢
莱昂

Answer 1

使用 android.media.SoundPool :

public class MyActivity extends Acticity implements SoundPool.OnLoadCompleteListener {
    private SoundPool soundPool;
    private final int maxPlaying = 4;
    private final int volume = 1;
    private final int priority = 1;
    private final int no_loop = 0;
    private final float normal_playback_rate = 1f;
    private final Map<Integer, Integer> loadedSongsCache = new HashMap<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        soundPool = new SoundPool(maxPlaying, AudioManager.STREAM_MUSIC, 0);
        soundPool.setOnLoadCompleteListener(this);

        playSong(R.raw.somethingSound);
        playSong(R.raw.somethingSound2);
        playSong(R.raw.somethingSound3);
    }

    private void playSong(int resourceId){
        Integer sampleId = loadedSongsCache.get(resourceId);
        if (sampleId != null) {
            soundPool.play(sampleId, volume, volume, priority, no_loop, normal_playback_rate);
        } else {
            sampleId = soundPool.load(ColorMixActivity.this, songMix.getResourceId(), priority);
            loadedSongsCache.put(songMix.getResourceId(), sampleId);
        }
    }

    @Override
    public void onLoadComplete(SoundPool soundPool, int sampleId, int status) {
        if (status == 0)
            soundPool.play(sampleId, volume, volume, priority, no_loop, normal_playback_rate);
    }

    @Override
    protected void onDestroy() {
        soundPool.release();
        super.onDestroy();
    }
}