Alternative Pinch-to-Zoom for MapView

Is there any way to implement a alternative Pinch-To-Zoom for the MapView? Because i have problems with original zoom -> MapView MultiTouch zoom (Pinching) unreliable and chaotic, it would be great to implement that by own. For example with the multi-touch-controller project. Or is there too much going on internally in the MapView to build a good zooming? (I think about the sizing while you are开发者_开发技巧 in zoom gesture, can't imagine how to do this)

You can always intercept touch events in an overlay, and calculate your own zoom.