Fragments onResume from back stack

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For a lack of a better solution, I got this working for me:
Assume I have 1 activity (MyActivity) and few fragments that replaces each other (only one is visible at a time).

In MyActivity, add this listener:

getSupportFragmentManager().addOnBackStackChangedListener(getListener());

(As you can see I’m using the compatibility package).

getListener implementation:

private OnBackStackChangedListener getListener()
    {
        OnBackStackChangedListener result = new OnBackStackChangedListener()
        {
            public void onBackStackChanged() 
            {                   
                FragmentManager manager = getSupportFragmentManager();

                if (manager != null)
                {
                    MyFragment currFrag = (MyFragment) manager.findFragmentById(R.id.fragmentItem);

                    currFrag.onFragmentResume();
                }                   
            }
        };

        return result;
    }

MyFragment.onFragmentResume() will be called after a “Back” is pressed. few caveats though:

  1. It assumes you added all
    transactions to the backstack (using
    FragmentTransaction.addToBackStack())
  2. It will be activated upon each stack
    change (you can store other stuff in
    the back stack such as animation) so
    you might get multiple calls for the
    same instance of fragment.

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