CDAdapter.java

    public class ChatAdapter extends RecyclerView.Adapter<ItemViewHolder> {

        private final Context context;

        public ChatAdapter(Context context) {
            this.context = context;
        }

        protected List<Item> items = new ArrayList<>();

        @Override
        public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

            LayoutInflater layoutInflater = (LayoutInflater) 
                this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            return new ItemViewHolder(layoutInflater.inflate(R.layout.chat_message, parent, false));

        }

        @Override
        public void onBindViewHolder(ItemViewHolder holder, int position) {
            holder.bind(items.get(position));
        }

        @Override
        public int getItemCount() {
            return items.size();
        }
    }