Android back button and MediaController

孤人 提交于 2019-11-27 13:31:38

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.

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.

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();
}
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