问题:

I have developed some chat application where i can send and received messages. But the problem is whenever i send or receive messages the recycler view is not scrolling to top so that messages gets diplayed above the keypad.

I have used the above mentioned recycler view android.support.v7.widget.RecyclerView.

回答1:

On updating recyclerview try to run this code :

recyclerView.post(new Runnable() {
    @Override
    public void run() {
        // Call smooth scroll  
        recyclerView.smoothScrollToPosition(adapter.getItemCount() - 1);                                 
    }
});

回答2:

I use the following code so that the scroll is automatic until the last position:

recyclerView.smoothScrollToPosition(adapter.getItemCount());

I implement to add a new item to the list.

回答3:

Try the bellow method for auto scroll to your particular position.

adapter = new DeliveriesDateRecycleAdapter(getActivity(),sampleDatedate, position);
                recyclerviewDates.setAdapter(adapter);
                adapter.notifyDataSetChanged();
                recyclerviewDates.smoothScrollToPosition(position);

Note : position - the position of the list that you want to show.