如何使用Android动画（可能是“ Android MediaPlayer / SoundPool”）播放“ Tick Tick”声音？

Question

我有一个自定义视图（PieView），该视图具有旋转动画。现在，我想与旋转速度同步播放tick tick tick tick...声音（也就是说，当旋转速度快时，刻度线应该快，而旋转慢时，刻度线应该慢）。为此，我首先创建了一个名为magicbox_tick.mp3的mp3文件，该文件只有一个（1）刻度。接下来，我尝试用Animation.setUpdateListener()播放声音。

[首先，我尝试用MediaPlayer播放音乐，但在大约10或15滴答之后，它停止了。因此，现在我正在尝试SoundPool播放音乐。

相关的代码段如下所示：

public PieView extends View {
  // ... constructors, other methods etc
  private SoundPool soundPool;
  private int soundId;

  void init(){  // called inside those constructors
        SoundPool soundPool = new SoundPool(5, AudioManager.STREAM_MUSIC, 0);
        soundId = soundPool.load(getContext(), R.raw.magicbox_tick, 1);
  }

  public void rotateTo(){
    animate()..setInterpolator(new DecelerateInterpolator())
                .setDuration(mDuration)
                .setListener(someListener)
                .rotation(targetAngle)
                .setUpdateListener(animation -> {
                    myPlaySound();  // <----------------------- This is the sound playing code
                })
                .start();
  }

  void myPlaySound(){
          soundPool.play(soundId, 1, 1, 0, 0, 1); // this doesnot play the `tick` sound
          // previously I used MediaPlayer like this:
         /*
            MediaPlayer mp = new MediaPlayer.create(getContext(), R.raw.magicbox_tick);
            mp.play(); 
               // these 2 line, after some 10 ticks, stopped working. 
          */
  }

}

我从未做过这样的事情，而且我也不知道该如何解决。谁能帮我？请注意，只要可行，我就会接受所有答案。您不必使用SoundPool。因此，假设您可以使其与android MediaPlayer一起使用，我对此表示同意。

Answer 1

[特别感谢Mike M先生的宝贵意见。我可以使用MediaPlayer修复它。应该调用MediaPlayer.release()方法。为了使声音与角度运动保持同步，我保留了一个if块，该块检查旋转dTheta是否大于tolerance角度。因此，如果有人需要它，则完整的代码如下所示：

public PieView extends View{
     private float omega0; // holds the previous rotation
    /**
     * @brief: plays a music using mediaPlayer
     * @input:
     * @output: void, plays a music
     * */
    private void myPlayTick() {
        float omega1 = Math.abs(getRotation());
        float dOmeda = 0;
        if(omega1>omega0){
            dOmeda = omega1 - omega0;
        }else{
            dOmeda = omega0-omega1;
        }
        if(dOmeda > threshold){
            omega0 = omega1; // update previous rotation
            final MediaPlayer mp = MediaPlayer.create(getContext(), R.raw.magicbox_tick);
            mp.start();
            mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                @Override
                public void onCompletion(MediaPlayer mp) {
                    releaseMediaPlayer(mp);
                }
            });
        }
    }

    /**
     * @brief: releases mediaPlayer resource so that other mediaPlayers can use sound hardware resources
     * @input: MediaPlayer object
     * @output: void
     * */
    private void releaseMediaPlayer(MediaPlayer mediaPlayer) {
        try {
            if (mediaPlayer != null) {
                if (mediaPlayer.isPlaying())
                    mediaPlayer.stop();
                mediaPlayer.release();
                mediaPlayer = null;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


 public void rotateTo(){
    animate()..setInterpolator(new DecelerateInterpolator())
                .setDuration(mDuration)
                .setListener(someListener)
                .rotation(targetAngle)
                .setUpdateListener(animation -> {
                   myPlayTick();                  
                })
                .start();
  }
     // ... rest of the code, such as constructors, etc
}