title: Find a view of a Fragment in the Fragment Activity
body: <p>I have a FragmentActivity in which a Fragment is attached. Now at a particular step in onBackPressed of the Fragment Activity, I want to change the DRAWABLE OF A BUTTON which is defined in Fragment and not in the Fragment Activity. </p>
  
  <p>My Question is: How can I change the drawable of that Button (which is defined under Fragment), in my Fragment Activity's onBackPressed Method.</p>
  
  <p>Thanks</p>