title: How to control secondary screen with my app on primary screen in Android?
body: <p>I am developing an application to control the secondary display using the buttons in my application. My app will run on the primary screen and I want to send the navigation and selection key events to the secondary screen through my controller app on the primary screen.</p>
  <p>Notes:
  These two displays are external displays and have their own screen id.</p>
  <p><a href="https://i.stack.imgur.com/Mr26m.png" rel="nofollow noreferrer">Scenario</a></p>