在我的应用程序中存在两个活动和一个按钮。当用户触摸activity1中的按钮时，应用程序转到activity2，连续播放三幅图像和声音，并重复，直到用户触摸返回按钮。当用户触摸后退按钮应用程序时，转到activity1。问题是，当按下后退按钮时，它进入第二个活动，但没有显示图像，广播声音没有中断，并且不断重复，节目循环没有出现。我不知道程序逻辑哪里出错了！请告诉我我的代码是：

{
    public MediaPlayer mp = new MediaPlayer();
    Button button;
    ImageView im;
    Context context;
    int current_img = 0;
    int current_aud = 0;
    boolean flag= false;

    int[] sounds={R.raw.anar,R.raw.ab,R.raw.abi};
    int[] images = { R.drawable.anar, R.drawable.water , R.drawable.abi};
    String[] texts={"انار","آب","آبی"};
    AnimationDrawable animation = new AnimationDrawable();
    @Override
    public void onBackPressed() {

        if (mp != null && mp.isPlaying()) {
            Toast.makeText(MainActivity.this, "in backpress", Toast.LENGTH_LONG).show();
            mp.stop();
            mp.release();
            mp = null;
        super.onBackPressed();
        this.finish();
    }
    }

  @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final TextView textView=findViewById(R.id.textView);

        im = findViewById(R.id.imageView);
        im.setImageResource(R.drawable.anar);

        final Handler handler = new Handler();
        Runnable runnable = new Runnable() {
            int i = 0;
            int j = 0;

            public void run()
            {

                    textView.setText(texts[i]);
                    im.setImageResource(images[i]);
                    i++;

                    mp = MediaPlayer.create(MainActivity.this, sounds[j]);

                        Toast.makeText(MainActivity.this, "in while", Toast.LENGTH_LONG).show();
                        mp.start();
                        j++;

                    if (j > sounds.length - 1) {
                        j = 0;
                    }
                    if (i > images.length - 1) {
                        i = 0;
                    }
                    handler.postDelayed(this, 5000);  //for interval...
            }

        };
  }
}