title: Global touch gesture in Android?
body: <p>So I am starting to create a very simple app and I read on how to setup gestures within the app.<br>
  I want to know if there is a way to set global gesture for the android device?</p>
  
  <p>If the app is running in the background (not on the screen at all) and user does some gesture on the screen.  can I control that?  Can I launch something or activate something based on that gesture?</p>
  
  <p>Please give me some info in detail if you can.  I am kinda new to this.</p>
  
  <p>Thank you.</p>