ChatFragment

ChatFragment

public class ChatFragment extends Fragment {
	private static final String ARG_MANAGER = "manager";
	private List<MessageModel> messages = new ArrayList<>();
	private MessageItemAdapter messageItemAdapter = new MessageItemAdapter(messages);
	private Unbinder unbinder;

	@BindView(R.id.progressbar_loading_container)
	FrameLayout progressbarLoadingView;

	@BindView(R.id.recyclerView_messagesContainer)
	RecyclerView messagesContainer;

	@BindView(R.id.editText_messageInput)
	AppCompatEditText messageInput;

	@BindView(R.id.imageButton_sendMessage)
	ImageButton sendMessage;

	private ManagerModel managerModel;

	public ChatFragment() {
		// Required empty public constructor
	}

	public static ChatFragment newInstance(ManagerModel managerModel) {
		ChatFragment fragment = new ChatFragment();
		Bundle args = new Bundle();
		args.putSerializable(ARG_MANAGER, managerModel);
		fragment.setArguments(args);
		return fragment;
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		if (getArguments() != null) {
			managerModel = (ManagerModel) getArguments().getSerializable(ARG_MANAGER);
		}
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	                         Bundle savedInstanceState) {
		View view = inflater.inflate(R.layout.fragment_chat, container, false);
		unbinder = ButterKnife.bind(this, view);
		return view;
	}

	@Override
	public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
		super.onViewCreated(view, savedInstanceState);
		LinearLayoutManager linearLayoutManager
				= new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false);
		messagesContainer.setLayoutManager(linearLayoutManager);
		messagesContainer.addItemDecoration(new LinearVerticalSpacingItemDecoration(
				HelperUtils.convertDensityPixelsToPixels(getContext(), 16)));
		messagesContainer.setAdapter(messageItemAdapter);

		sendMessage.setOnClickListener(this::sendMessage);
		loadMessages();
	}



	@Override
	public void onDestroyView() {
		super.onDestroyView();
		unbinder.unbind();
	}

	private void loadMessages() {
		progressbarLoadingView.setVisibility(View.VISIBLE);
		for (int i = 0; i <= 10; i++) {
			MessageModel currMsgModel = new MessageModel();
			if (i % 2 == 0) {
				currMsgModel.author = 0;
			} else {
				currMsgModel.author = 1;
				messageItemAdapter.setManagerPhotoUrl("https://picsum.photos/200");
			}
			currMsgModel.dateSend = new SimpleDateFormat("HH:mm:ss")
					.format(Calendar.getInstance().getTime());
			currMsgModel.text = "Текст номер сообщения " + i;
			currMsgModel.managerId = "1234";
			messages.add(currMsgModel);
		}
		messageItemAdapter.notifyDataSetChanged();
		messagesContainer.scrollToPosition(messageItemAdapter.getItemCount() - 1);
		progressbarLoadingView.setVisibility(View.GONE);
	}

	private void sendMessage(View view) {
		messagesContainer.smoothScrollToPosition(messageItemAdapter.getItemCount() - 1);
		Toast.makeText(getContext(), "Tab with manager " + managerModel.firstName,
				Toast.LENGTH_SHORT).show();
	}
}