Can we implement Magnification gesture using our own apps?

问题

I need to implement Magnification Gesture using my android application. Some or all of this information applies only to Nexus 7 devices running Android 4.2.

Check more about Magnification Gesture.

I need to apply percentage level of zoom in and zoom out using my android applicatoin.

Is it possible to do or not ?

I have searched but nothing find related to this.

EDIT

Can we perform same effect zoom in - zoom out bellow Android 4.2 ?

来源：https://stackoverflow.com/questions/23843299/can-we-implement-magnification-gesture-using-our-own-apps