Android Fragmnet onSaveInstance
<p>I am getting a bit crazy because of fragment in android.
I have been looking for answer nearly two days. There is no any result. 
My problem is that: I hava a MainActivity. I attach  FragmentA to this activity.When I add FragmentB I want to save value of FragmentA in onSaveInstance method.After FragmentB insterted to MainActivity ı get back. I control onSaveInstate bundle it is always null.
And onSaveInstace method is never called. There are many similar question in stackoverflow ı couldnt find exact solution for this problem. Please help.</p>
