title: Error on Fragment screen orientation update
body: <p>When I press a button from fragment A the fragment B is shown. The problem occurs when I change the the screen orientation; instead of the view of fragment B being updated, the fragment A appears updated; if I want to see the fragment B updated I need to press the same button again.<br>
  What is recommended on fragments calling another fragment? What do I have to do to prevent this inappropriate update of fragment A?</p>