@Sreedhu Madhu .... you have to customize your imageview and work it on bitmap and canvas to achieve so..
although i suggest you to use one of the library posted by Henning Dodenhof on github and android-arsenal... CircleImageView
on the other side you can take a look how this is done..using this class..
Custom Class for Circular ImageView
the imp methods was setup() and onDraw()
