Android-Image Size change When get Focused

I am new to android.I am trying to make the image to get to zoom out to a particular level when is get Focused and when the Focus is gone then the image should go to original size automatically.I don't want to zoom in and out a image. I just want that image to change size when it is get focused and once focus is gone it should get it to o开发者_如何学编程riginal size same as in iPhone.Thanks in advance.

use View.setOnFocusChangeListener http://developer.android.com/reference/android/view/View.html#setOnFocusChangeListener(android.view.View.OnFocusChangeListener)