title: How to create a transparent filter that don't process touch events
body: <p>I would like to apply a sort of semi-transparent (configurable alpha channel value) filter (an png, activity, don't know yet how) over the screen and this filter to not process touch events.
  How can I do this ?</p>
  
  <p>Later edit: no I don't think is possible what I want in this manner, I need another solution.
  Basically I want to implement something similar to Screen Filter : <a href="http://www.appbrain.com/app/screen-filter/com.haxor" rel="nofollow">http://www.appbrain.com/app/screen-filter/com.haxor</a></p>
  
  <p>How this could be done ?
  Thanks.</p>