Get the last fragment in back stack

Question

I have seen this post but the solutions posted here are not working for me: get the latest fragment in backstack

When I replace a fragment for another I use:

FragmentManager manager = getSupportFragmentManager();
    FragmentTransaction ft = manager.beginTransaction();

    ft.replace(android.R.id.tabcontent, fragment, tag);
    ft.addToBackStack(null);

    ft.commit();

So, please notice that I'm using tags to detect any fragment.

My problem in particular is the following:

Suppose I have fragment_A, fragment_B and fragment_C. I can get to fragment_C from fragment_A or fragment_B and depending of the parent of call I have to do something particular. So, again I need to recover the last FRAGMENT in the back stack.

When I try to do:

FragmentManager fm = getSupportFragmentManager();

        for(int entry = 0; entry < fm.getBackStackEntryCount(); entry++){
            String ide = fm.getBackStackEntryAt(entry).getName();
           Log.i("TAG", "Found fragment: " + ide);
        }

I get nulls. If I use getId() instead, I get numbers so I tried doing:

int id = fm.getBackStackEntryAt(entry).getId();
Fragment fragment = fm.findFragmentById(id);
Log.i("TAG", "Found fragment: " + fragment.getTag());

But I get nulls.. I dont know what else to do, so any help will be appreciated.

Edit: I call this methods in onBackPressed() { ...}

Answer 1

If you're using BackStackEntry.getName(), it should be:

ft.replace(android.R.id.tabcontent, fragment, tag);
ft.addToBackStack(tag);