在VideoView中播放视频时，Android后退按钮无法正常工作

Question

在VideoView中播放视频时，Android后退按钮无效。但它在播放视频之前有效。我正在为VideoView使用自定义MediaController。 我尝试使用dispatchKeyEvent，它无法正常工作。 使用VideoView的活动代码：

mc = new CustomMediaController(mVideo.getContext(), screenIcon) {

@Override
public void hide(){
}

@Override
public boolean dispatchKeyEvent(KeyEvent event){
     if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
         super.hide();
         ((Activity) getContext()).finish();
         return true;
     }
     return super.dispatchKeyEvent(event);
}
};

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
   if ((keyCode == KeyEvent.KEYCODE_BACK)) {
     onBackPressed();
     finish();
   }
   return true;
}

@Override
public void onBackPressed() {
  super.onBackPressed();
  finish();
}

CustomMediaController还包含dispatchKeyEvent：

@Override
public boolean dispatchKeyEvent(KeyEvent event) {
   if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
     ((Activity) getContext()).finish();
   }
   return super.dispatchKeyEvent(event);
}

此外，当我滚动布局时，mediaController没有保持其在videoView中的位置。为了解决这个错误，我添加了一个代码来修复mediaController的位置。

FrameLayout f;
RelativeLayout.LayoutParams lp;
RelativeLayout.LayoutParams params;

         params = (RelativeLayout.LayoutParams) mVideo.getLayoutParams();
            params.height = mp.getVideoHeight();
            progress.dismiss();
            f = (FrameLayout) mc.getParent();
            lp = new RelativeLayout.LayoutParams(
                    RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
            lp.addRule(RelativeLayout.ALIGN_BOTTOM, mVideo.getId());
            try {
                ((LinearLayout) f.getParent()).removeView(f);
            } catch (Exception e) {
                ((RelativeLayout) f.getParent()).removeView(f);
            }
            ((RelativeLayout) mVideo.getParent()).addView(f, lp);
            //mc.setAnchorView(mVideo);
            mVideo.setLayoutParams(params);

当我删除上面的代码时，后退按钮工作正常。

我在堆栈溢出中经历了以下问题，但没有解决我的问题。 我试过Stack Overflow链接： Android back button and MediaController Back button won't work when VideoView is playing video First Back button press not caught when playing a video android Problem with back button in VideoView

Answer 1

覆盖我的mediacontroller中的dispatchKeyEvent（）后，它工作正常

 mediaController=new MediaController(this){
        @Override
        public void hide() {
            mediaController.show();
        }
        @Override
        public boolean dispatchKeyEvent(KeyEvent event){
            if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
                super.hide();
                ((Activity) getContext()).finish();
                return true;
            }
            return super.dispatchKeyEvent(event);
        }
    };

    videoView.setMediaController(mediaController);