title: Android detecting the touch state from any application
body: <p>Is it possible to detect touch events from within another application, specifically swipes?  I'd like to be able to detect if the user has swiped left or right (even with 2 fingers - but not required).  Perhaps there is a service or broadcast I can listen to.</p>
  
  <p>or failing that, is there some API perhaps that I can poll say 10 times a second to get the touch state and I can compute the rest (why, I remember writing a mouse driver strobing the COM1 port with IN OUTs in 8086 assembler coded in a TSR on a XT...)!</p>
  
  <p>Anyway, any help appreciated.  (I think it could be done by hijacking the primary Launcher and having a transparent click-through on-top activity, but that's seriously fraud with danger!)</p>