Fragment onHiddenChanged not called

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.

My Fragment is used with a TabIndicator and it's only one FragmentClass which is used a few times.

Here's the normal standard override class:

@Override
public void onHiddenChanged(boolean hidden) {
    super.onHiddenChanged(hidden);
}