Android 4.2: back stack behaviour with nested fragments

Question

With Android 4.2, the support library got support for nested fragments see here. I\'ve played around with it and found an interesting behaviour / bug regarding back stack an

Answer 1

i was able to handle fragment back stack by adding to the parent fragment this method at the onCreate View() method and passing the root view.

private void catchBackEvent(View v){
    v.setFocusableInTouchMode(true);
    v.requestFocus();
    v.setOnKeyListener( new OnKeyListener()
    {
        @Override
        public boolean onKey( View v, int keyCode, KeyEvent event )
        {
            if( keyCode == KeyEvent.KEYCODE_BACK )
            {
                if(isEnableFragmentBackStack()){
                    getChildFragmentManager().popBackStack();
                                    setEnableFragmentBackStack(false);
                    return true;
                }
                else
                    return false;   
            }
            return false;
        }
    } );
}

The method isEnableFragmentBackStack() is a boolean flag to know when i'm on the main fragment or the next one.

Make sure that when you commit the fragment that needs to be have stack, then you must add the addToBackstack Method.