java - 为什么这种在按钮单击方法上播放声音不起作用

Question

我想要做的是在单击此按钮时调用三种声音之一。声音在首选项屏幕中。在按钮上单击它也应该显示动画。目前正在发生的事情是我将点击按钮，一切都会完美运行，但随后我停止动画并在我第二次点击按钮时发出声音。当我再次单击按钮开始备份动画和声音时，我听不到声音，但动画仍然有效。老实说，我不知道出了什么问题。这是我的代码...

public void buttonClick() {
    imgView = (ImageView) findViewById(R.id.imageView);
    button = (Button) findViewById(R.id.button);
    blade = (ImageView)findViewById(R.id.imageView4);
    final Animation animRotate = AnimationUtils.loadAnimation(this, R.anim.rotate);
    1stSound = MediaPlayer.create(this, R.raw.file.mp3);
    2ndSound = MediaPlayer.create(this, R.raw.file.mp3);
    3rdSOund = MediaPlayer.create(this, R.raw.file.mp3);

    button.setOnClickListener(

            new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    SharedPreferences getPrefs = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
                    boolean option1 = getPrefs.getBoolean("alternate", false);
                    boolean option2 = getPrefs.getBoolean("white", false);
                    boolean option3 = getPrefs.getBoolean("standard",false);

                    if (blade.getAnimation() == null) {
                        // no animation, start it
                        if (option1 == true){
                            1stSound.start();
                            blade.startAnimation(animRotate);

                        } else if (option2 == true){
                            3rdSound.start();
                            blade.startAnimation(animRotate);

                        } else if (option3 == true) {
                            2ndFan.start();
                            blade.startAnimation(animRotate);

                        }

                        } else {
                            //animation is showing, stop it
                            blade.clearAnimation();
                            3rdSound.stop();
                            2ndSound.stop();
                            1stSound.stop();

                        }





                    current_image_index++;
                    current_image_index = current_image_index % images.length;
                    imgView.setImageResource(images[current_image_index]);
                    imgView.invalidate();


                }


            }
    );
}

Answer 1

看看 MediaPlayer state diagram .调用 stop() 后，您还需要调用 prepare()(或 prepareAsync())才能再次播放。

简而言之，这样做:

3rdSound.stop();
3rdSound.prepareAsync();
2ndSound.stop();
2ndSound.prepareAsync();
1stSound.stop();
1stSound.prepareAsync();