How to reverse recyclerView layout like a chat app with FirebaseUI FirestoreRecyclerAdapter?

Question

I am using FirestoreRecyclerAdapter to make a chat app in java. When adding a message it works fine but I want messages to show at bottom not on top. I tried

layoutManager.setReverseLayout(true);

layoutManager.setStackFromEnd(true);

Now it reverse it's position which is good but it's not automatically scrolling to bottom position. And when I add a new message I need to scroll manually to see it.

Answer 1

Recyclerview automatically scroll to bottom after adding below lines

 new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            getActivity().runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    recyclerView.smoothScrollToPosition(0);

                }
            });
        }
    }, 1000);

above solution will not work if parent layout is horizontal scroll.

Other solution is

 recyclerView.scrollToPosition(0);

Both line of code work for me. you can use any of the solution