Adapter para el chat demo chat android firebase

ChatAdapter.java

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.List;

/**
 * Created by Jhordan on 23/07/15.
 */
public class ChatAdapter extends RecyclerView.Adapter<ChatAdapter.ViewHolder> {

    private static final int MESSAGE_SENT = 1;
    private static final int MESSAGE_RECEIVED = 2;
    private List<Chat> chatList;
    private String mId;

    public ChatAdapter(List<Chat> chatList, String mId) {
        this.chatList = chatList;
        this.mId = mId;
    }


    @Override
    public ChatAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view;
        if (viewType == MESSAGE_SENT)
            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_message_sent, parent, false);
        else
            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_message_received, parent, false);

        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        Chat chat = chatList.get(position);
        holder.txtMessage.setText(chat.getMessage());

    }


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

    @Override
    public int getItemViewType(int position) {
        if (chatList.get(position).getAuthor().equals(mId))
            return MESSAGE_SENT;

        return MESSAGE_RECEIVED;
    }

    public class ViewHolder extends RecyclerView.ViewHolder {

        TextView txtMessage;
        public ViewHolder(View view) {
            super(view);
            txtMessage = (TextView) view.findViewById(R.id.txt_message);
        }
    }

}