How to implement zoom effect for image view in android?

Question

I have to implement image zooming, I have tried with so many codes.But i didnt get full idea of gesture events. I want to implement when we apply double tap, image will be z

Answer 1

Here is a great example on how to implement zoom affect on touch with a imageview

Zoom effect on imageview

EDIT:

Also here is another great one.

Pinch to zoom tutorial