How can I get the latest fragment instance added in backstack (if I do not know the fragment tag & id)?
FragmentManager fragManager = activity.getSupport
I will add something to Deepak Goel's answer since a lot of people, me included, were getting a null by using his method. Apparently to make the tag work when you add a fragment to the backstack you should be doing it like this:
getSupportFragmentManager.beginTransaction().replace(R.id.container_id,FragmentName,TAG_NAME).addToBackStack(TAG_NAME).commit();
You need to add the same tag twice.
I would have commented but i don't have 50 reputation.