Android back button and MediaController

问题

I know how to take control of the back button. I have a VideoView embedded in a FrameLayout. My question is when the video pops up, the video controls are present for a few seconds. Hitting the back button while they are visible hides the video controls. Is there a way to ignore that function and do the next back action as if the video controls weren't visible?

The reason I ask is if I really do want to go back, I must hit the back button twice; once to hide the controls and second to actually go back

回答1:

Based on the source code, this should work:

1. Extend MediaController (for the purposes of this answer, call it RonnieMediaController)
2. Override dispatchKeyEvent() in RonnieMediaController
3. Before chaining to the superclass, check for KeyEvent.KEYCODE_BACK, and if that is encountered, tell your activity to finish()
4. Use RonnieMediaController instead of MediaController with your VideoView

Personally, I'd just leave it alone, as with this change your user cannot make a RonnieMediaController disappear on demand.

回答2:

You can simply write:

mVideoView.setMediaController(new MediaController(this){
        public boolean dispatchKeyEvent(KeyEvent event)
        {
            if (event.getKeyCode() == KeyEvent.KEYCODE_BACK)
                ((Activity) getContext()).finish();

            return super.dispatchKeyEvent(event);
        }
    });

No need to create new class.

回答3:

You can also have the Activity handle the event:

mVideoView.setMediaController(new MediaController(this){
    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK ) {
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                return true;
            } else if (event.getAction() == KeyEvent.ACTION_UP) {
                ((Activity) getContext()).onBackPressed();
                return true;
            }
        }
        return super.dispatchKeyEvent(event);
    }       
});

Then handle it in your Activity:

@Override
public void onBackPressed() {
    // clean up or send result here
    finish();
}

来源：https://stackoverflow.com/questions/6051825/android-back-button-and-mediacontroller