Chat.java

public class Chat {
    private String username;
    private String message;

    public Chat() {
        // Default Constructor kosong
    }

    public Chat(String username, String message) {
        this.username = username;
        this.message = message;
    }

    public String getUsername() {
        return username;
    }


    public String getMessage() {
        return message;
    }

}

ChatAdapter.java

public class ChatAdapter extends RecyclerView.Adapter<ChatAdapter.ViewHolder> {
    private List<Chat> chatList;
    private Context context;

    public ChatAdapter(Context context) {
        this.context = context;
        chatList = new ArrayList<>();
    }

    public void setData(List<Chat> data) {
        chatList.clear();
        chatList.addAll(data);
        notifyDataSetChanged();
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        // R.layout.namaLayout
        View v = LayoutInflater.from(context).inflate(R.layout.item_chat, parent, false);
        return new ViewHolder(v);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.bindView(chatList.get(position));
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder {
        private TextView tvUsername, tvMessage;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            tvUsername = itemView.findViewById(R.id.tvUsername);
            tvMessage = itemView.findViewById(R.id.tvMessage);

        }

        public void bindView(Chat chat) {
            tvMessage.setText(chat.getMessage());
            tvUsername.setText(chat.getUsername());
        }
    }
}