title: Fragment onHiddenChanged not called
body: <p>I recently added Fragments to my applications. For a new application i'll need to get
  notified as soon as my fragment is shown. So i can do some calculations as soon as my
  fragment is shown again. </p>
  
  <p>My Fragment is used with a TabIndicator and it's only one FragmentClass which is used
  a few times. </p>
  
  <p>Here's the normal standard override class:</p>
  
  <pre><code>@Override
  public void onHiddenChanged(boolean hidden) {
      super.onHiddenChanged(hidden);
  }
  </code></pre>