title: how to hide fragment when a video in another fragment is full view
body: <p>I have an Activity that contains two fragments beside each other. One of the fragment is a List Fragment and the other one contains surface view for a video.
  I've implemented a custom controller to make the video in full screen but when the full screen button is pressed the list fragment still exist. How can i show/hide the list fragment when the toggle full screen button on the video fragment is pressed?
  <a href="https://i.stack.imgur.com/vyLef.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vyLef.png" alt="enter image description here"></a></p>