Change image dynamically

[HardikSuba]

Hey, This ActionBar is very useful for my project. thanks a lot.
I have a little trouble, and I read the same issue in Closed Issue, but didn't able to get the proper answer.

How do I change the image of button on onResume function of activity?
I'm showing dialog of notification, based on the user reply the button icon should be set.
It's not necessary to use onResume, if any other way to change the image based on dialog response is also okay.