How to delete a specific fragment from back stack in android

Question

I have a problem about removing a specific fragment from back stack.My scenario is like this.Fragment-1 is replaced with Fragment-2 and then Fragment-2 is replaced with Frag

Answer 1

If you are adding/launching all three fragments in the same activity, instead of the add(), use replace() (replace Fragment2 with Fragment3). The replace method removes the current fragment from backstack before adding the new one. If you are launching Fragment3 from a different activity, and thus you can't use replace(), remove Fragment2 from backstack before starting the new activity (which adds Fragment3):

// in Fragment2, before adding Fragment3:
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
               .remove(this) // "this" refers to current instance of Fragment2
               .commit();
fragmentManager.popBackStack();
// now go ahead and launch (add) fragment3
// if fragment3 is launched from a different activity, 
// start that activity instead
fragmentManager.beginTransaction()
               .add(R.id.a_container_view_in_activity, new Fragment3(),
                    Fargment3.FRAGMENT3_ID)
               .commit();