Fragment backstack 和替换

Question

I have 2 fragments A and B . I added fragment B from fragment A (A->B) with addToBackStack() . Now when I am in fragment B and press back everything is OK and return to the A .

But when I am in fragment C I want to display fragment B if it is existed in fragment manager by checking getFragmentManager().findFragmentByTag(""); then I replace this fragment.

The problem is the backstack not work in this situation. I mean whenever I press back the fragment A is not shown. How can I preserve that backstack too?

Answer 1

This is the code i am using

FragmentManager fragmentManager = getFragmentManager();
            fragmentManager.popBackStack(fragment.toString(), FragmentManager.POP_BACK_STACK_INCLUSIVE);
            FragmentTransaction tx = fragmentManager.beginTransaction();

            Log.v("on calling fragment", fragment + "==" + fragment.toString());
            tx.replace(R.id.fl_main, fragment).addToBackStack(fragment.toString());

This give different particular backstack string to each fragment being replaced.