Android SoundPool 在播放另一种声音之前不会第二次播放相同的声音

Question

这是我的 Activity :

public class MainActivity extends AppCompatActivity {

    private SoundPool soundPool;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        setVolumeControlStream(AudioManager.STREAM_MUSIC);

        soundPool = new SoundPool(5, AudioManager.STREAM_MUSIC, 0);
        final int sound1 = soundPool.load(this, R.raw.whack, 1);
        final int sound2 = soundPool.load(this, R.raw.miss, 1);

        Button b1 = (Button) findViewById(R.id.b1);
        Button b2 = (Button) findViewById(R.id.b2);

        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                playSound(sound1);
            }
        });
        b2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                playSound(sound2);
            }
        });
    }

    private void playSound(int soundId) {

        AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
        float volume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
        soundPool.play(soundId, volume, volume, 1, 0, 1);
    }
}

问题是当我点击 Button1 时，会播放 sound1。然后，当我一次又一次地点击 Button1 时，直到我点击 Button2 时才播放任何内容。当我这样做时，会播放 sound2。然后，如果我单击 Button1，将播放 sound1。当我一遍又一遍地单击 Button2 时，会发生相同的情况。那么这里的问题是什么？

Answer 1

根据 SoundPool.play()文档 volume 值必须从 0.0 到 1.0。但是 audioManager.getStreamVolume(AudioManager.STREAM_MUSIC) 返回更大的值(例如 12)。因此，您应该设置正确的音量值。下面的工作代码:

public static void playAudio(Context context, SoundPool player, int soundId, float speed){
        AudioManager mgr = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
        float actualVolume=(float) mgr.getStreamVolume(AudioManager.STREAM_MUSIC);
        float maxVolume=(float) mgr.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
        float volume= actualVolume/maxVolume;
        player.play(soundId, volume, volume, 1, 0, speed);
    }