Viewpager with fragment pager adapter and Fragment - retainInstanceState recreates fragment on orientation change

Question

When I use retainInstanceState(true) in fragment and use it with a FragmentPagerAdapter, the fragment is recreated. Which is not expected behaviour. What is a potential work around

I found a blog post which gives a solution not to use retainInstanceState which is not possible in my case

Answer 1

Turns out viewpager retains fragments and tries to find fragment with that id.

First thing to do in Fragment's onCreate:

setRetainInstance(true);

In activity with tabs, Make sure you handle onSaveInstanceState correctly

@Override
public void onSaveInstanceState(bundle){
   super.onSaveInstanceState(bundle);
}

Even without saving viewpager id or reference to fragment as suggested in similar questions, the same fragment is reattached on orientation change