title: Pass through touch events on window overlay to an Activity behind it
body: <p>Some context.<br>
  I have a RelativeLayout that is added with a WindowManager the type is <code>TYPE_SISTEM_ALERT</code> with the flags <code>FLAG_NOT_TOUCH_MODAL FLAG_WATCH_OUTSIDE_TOUCH</code>.<br>
  I'm able to get touch events either on this RelativeLayout or in the Activity "behind" it, but as long as it's not part of the "RelativeLayout window" added. </p>
  
  <p><a href="https://i.stack.imgur.com/FtyMI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FtyMI.png" alt="enter image description here"></a>
  * The black bars are the Views on my RelativeLayout;<br>
  * the red rectangle is the whole container of this RelativeLayout;<br>
  * the yellow stars are the spots of space that is created from the black views;<br>
  * the white space is the Activity behind this RelativeLayout window on top.</p>
  
  <p>Imagine there is a Button on the yellow stars spots that are from the Activity A, BUT are VISIBLE to the user and if he clicks there.<br>
  the Button of the Activity A should be able to respond, even though its "behind" this RelativeLayout Window.</p>
  
  <p>My references, but unfortunately without success so far are : </p>
  
  <ol>
  <li><a href="https://stackoverflow.com/questions/9085022/android-overlay-to-grab-all-touch-and-pass-them-on">Android overlay to grab ALL touch, and pass them on?</a></li>
  <li><a href="https://stackoverflow.com/questions/8073803/android-multi-touch-and-type-system-overlay">Android : Multi touch and TYPE_SYSTEM_OVERLAY</a></li>
  </ol>
  
  <p>Is there a workaround to this? </p>