I have an application in which I need to implement image editing, which also includes pinch zooming. I am done with pinch zooming but I can test this only on device, not on emul
CTRL + a click on left side of the view screen will zoom out.
Double click on a location will zoom in.
North and South -> Scroll wheel - up and down
West-> CTRL+Scroll up at left side of the screen
East-> CTRL+Scroll up at right side of the screen
PinchZoom works on Multi-Touch.
If the device is supporting multi-touch then only your code will work else it wont work.
As the Android Emulators doesn't support multi-touch you can't test it on emulators.
Still new ADT has feature But I never tried this