Fragment with MapView is never removed from FragmentManager

Question

I have a Fragment with MapView in it. I add Fragment to container with following code:

    Fragment fragment = new MyLocationFragment()
    String tag= fragment.getClass().getName();

    FragmentTransaction transaction = fm.beginTransaction();
    transaction.setCustomAnimations(R.anim.slide_in_right, R.anim.slide_out_left,
            R.anim.slide_in_left, R.anim.slide_out_right);
    transaction.replace(R.id.container, fragment, tag);
    transaction.addToBackStack(null);
    transaction.commit();

Now when user presses back, this Fragment is supposed to be removed from FragmentManager. But if execute this code :

    Fragment fragment = getSupportFragmentManager().findFragmentByTag(MyLocationFragment.class.getName());

It never returns null, even if I replace other fragments in same container. What can I do to remove Fragment from FragmentManager? Am I doing something wrong here ?

Anyone has any idea about when Fragments should be removed from FragmentManager? — SilentKnight, Mar 31 '15 at 06:34
It's supposed to be removed after it gets destroyed. Fragment with MapView gets destroyed, but never removed from FragmentManager, really strange! — jimmy0251, Mar 31 '15 at 06:44
It gets removed when Back is pressed as it's transaction is added to backStack. — jimmy0251, Mar 31 '15 at 07:08
Fragment automatically gets removed from FragmentManager on Back key press if FragmentTransaction was added to backStack. — jimmy0251, Mar 31 '15 at 07:32

score 0 · Answer 1 · edited Jun 20 '20 at 09:12

When an activity is destroyed, its FragmentManagersaves out its list of fragments. When the activity is recreated, the new FragmentManager retrieves the list and recreates the listed fragments to make everything as it was before.

[Refer to book "Android Programming The Big Nerd Ranch Guide" P150]

So your should remove fragment from fragmentmanager. Refer to this Q&A Remove old Fragment from fragment manager

Your question maybe duplicate with thisHow to get a Fragment to remove itself, i.e. its equivalent of finish()?

Fragment with MapView is never removed from FragmentManager

1 Answers1