Is This the Right Way to Clean-Up Fragment Back Stack When Leaving a Deeply Nested Stack

Is this the right way to clean-up Fragment back stack when leaving a deeply nested stack?

Well there are a few ways to go about this depending on the intended behavior, but this link should give you all the best solutions and not surprisingly is from Dianne Hackborn

http://groups.google.com/group/android-developers/browse_thread/thread/d2a5c203dad6ec42

Essentially you have the following options

• Use a name for your initial back stack state and use
  FragmentManager.popBackStack(String name,
FragmentManager.POP_BACK_STACK_INCLUSIVE).
• Use FragmentManager.getBackStackEntryCount()/getBackStackEntryAt().getId()
  to retrieve the ID of the first entry on the back stack, and
  FragmentManager.popBackStack(int id,
FragmentManager.POP_BACK_STACK_INCLUSIVE).
• FragmentManager.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE)
  is supposed to pop the entire back stack... I think the documentation for
  that is just wrong. (Actually I guess it just doesn't cover the case where
  you pass in POP_BACK_STACK_INCLUSIVE),

Clear back stack using fragments

I posted something similar here

From Joachim's answer, from Dianne Hackborn:

http://groups.google.com/group/android-developers/browse_thread/thread/d2a5c203dad6ec42

I ended up just using:

FragmentManager fm = getActivity().getSupportFragmentManager();
for(int i = 0; i < fm.getBackStackEntryCount(); ++i) {    
    fm.popBackStack();
}

But could equally have used something like:

((AppCompatActivity)getContext()).getSupportFragmentManager().popBackStack(String name, FragmentManager.POP_BACK_STACK_INCLUSIVE)

Which will pop all states up to the named one. You can then just replace the fragment with what you want

Clear back stack when navigation drawer is opened

Your answer is here:

Is this the right way to clean-up Fragment back stack when leaving a deeply nested stack?

Essentially, what you want is getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);

How to Remove All Previous Fragments from Current Fragment except current one and first one?

On destroy of the Fragment F5 clear Back Stack upto F2.

Try something like this:

public method in your MainActivity:

public void clearBackStackInclusive(String tag) {
     getSupportFragmentManager().popBackStack(tag, FragmentManager.POP_BACK_STACK_INCLUSIVE);
}

now in your F5 fragment:

@Override
public void onDestroy() {
   super.onDestroy();
   ((MainActivity)getActivity()).clearBackStackInclusive("tag"); // tag (addToBackStack tag) should be the same which was used while transacting the F2 fragment
}

Reference

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