title: Get last fragment showed
body: <p>I have an activity with 4 fragments associated to it. In one of the fragments I can open another activity. When I am returning from the activity (with calling <code>finish()</code>) the default fragment is displayed and not the last one. For example: if I have 4 fragments a b c d which associated to activity A, the default displayed fragment is c. From fragment a I can open other activity B. What I want is to see the last fragment seen when returning from activity B back to activity A. </p>