title: Android MapActivity onLongPress / zooming mix up
body: <p>I have a class extending <code>MapActivity</code> which has an overlay attached to it extending <code>ItemizedOverlay</code>.  Inside the overlay I have a <code>GestureDetector</code> and a <code>OnGestureListener</code>.  Now for my problem:</p>
  
  <p>I have an action which triggers in the <code>onLongPress</code> of the <code>OnGestureListener</code> but <code>Android</code> triggers this even when you zoom in / out using the "pinch" gesture.  This is due to the fact that one finger tends to stay in one spot while the other one moves towards / away.  What kind of calls or checks could be implemented to detect whether the action is a pinch-zoom or a longPress, so I know to either handle or disregard in <code>onLongPress</code>?</p>