RecyclerView for messenger application

Question

I have converted the chat layout from listView to RecyclerView.

Now m facing some problem, When new messages arrive then it not showing automatically, I have to manually scroll to that messages.

Earlier in ListView it working.

I have used set setStackFormEnd in recylerView.

I want feature like whatsapp has like

if new message arrives and you are able to view last message then it will show that messages but

if you scrolling the messages then it doesn't change the position.

    layoutManager.setStackFromEnd(true);
    messagesView.setLayoutManager(layoutManager);
    messagesView.setItemAnimator(new DefaultItemAnimator());
    messagesView.addOnScrollListener(mOnScrollListener);

Sample on Create Code Code

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final RecyclerView recyclerView = (RecyclerView)    findViewById(R.id.recyclerview);
final Button addButton = (Button) findViewById(R.id.button_is_reverse);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setStackFromEnd(true);
layoutManager.setReverseLayout(true);
recyclerView.setLayoutManager(layoutManager);
recyclerView.addItemDecoration(new DividerDecoration(this));
adapter = new SampleAdapter(items);
recyclerView.setAdapter(adapter);
addButton.setOnClickListener(new View.OnClickListener() {
  @Override
  public void onClick(View v) {
    items.add("Items" +items.size());
    adapter.notifyItemInserted(items.size());
  }
});

score 1 · Answer 1 · answered Jun 16 '16 at 10:24

1

LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
layoutManager.setStackFromEnd(true);
layoutManager.setReverseLayout(true)
yourRecyclerView.setLayoutManager(layoutManager);

answered Jun 16 '16 at 10:24

Leo DroidCoder

14,527
4
62
54

@Arbitur check here https://stackoverflow.com/a/36897608/6352712 please – Serg Burlaka Feb 19 '18 at 10:56

score 0 · Answer 2 · answered Jun 16 '16 at 10:18

0

Scroll the recyclerview to last position

messagesView.scrollToPosition(messages.size()-1);

Where messages is your list of messages.

answered Jun 16 '16 at 10:18

jitinsharma

1,436
13
22

I don't want to manually scroll to position. Actually there is some provision setReverseLayout but even that is not working for me. – Jarvis Jun 16 '16 at 10:22
`layoutManager.setReverseLayout(true);`? This is also not working? – jitinsharma Jun 16 '16 at 10:24

score 0 · Answer 3 · answered Jun 16 '16 at 10:27

Use these line after you send/receive message event.

   mRecyclerView.postDelayed(new Runnable() {
                        @Override
                        public void run() {
                            mRecyclerView.smoothScrollToPosition(mRecyclerView.getAdapter().getItemCount());
                        }
                    }, 100);

RecyclerView for messenger application

3 Answers3