android-mvvm-with-dagger-2

ListFragment.java

public class ListFragment extends BaseFragment implements RepoSelectedListener {

    @BindView(R.id.recyclerView) RecyclerView listView;
    @BindView(R.id.tv_error) TextView errorTextView;
    @BindView(R.id.loading_view) View loadingView;

    @Inject ViewModelFactory viewModelFactory;
    private ListViewModel viewModel;

    @Override
    protected int layoutRes() {
        return R.layout.screen_list;
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        viewModel = ViewModelProviders.of(this, viewModelFactory).get(ListViewModel.class);

        listView.addItemDecoration(new DividerItemDecoration(getBaseActivity(), DividerItemDecoration.VERTICAL));
        listView.setAdapter(new RepoListAdapter(viewModel, this, this));
        listView.setLayoutManager(new LinearLayoutManager(getContext()));

        observableViewModel();
    }

    @Override
    public void onRepoSelected(Repo repo) {
        DetailsViewModel detailsViewModel = ViewModelProviders.of(getBaseActivity(), viewModelFactory).get(DetailsViewModel.class);
        detailsViewModel.setSelectedRepo(repo);
        getBaseActivity().getSupportFragmentManager().beginTransaction().replace(R.id.screenContainer, new DetailsFragment())
                .addToBackStack(null).commit();
    }

    private void observableViewModel() {
        viewModel.getRepos().observe(this, repos -> {
            if(repos != null) listView.setVisibility(View.VISIBLE);
        });

        viewModel.getError().observe(this, isError -> {
            if (isError != null) if(isError) {
                errorTextView.setVisibility(View.VISIBLE);
                listView.setVisibility(View.GONE);
                errorTextView.setText("An Error Occurred While Loading Data!");
            }else {
                errorTextView.setVisibility(View.GONE);
                errorTextView.setText(null);
            }
        });

        viewModel.getLoading().observe(this, isLoading -> {
            if (isLoading != null) {
                loadingView.setVisibility(isLoading ? View.VISIBLE : View.GONE);
                if (isLoading) {
                    errorTextView.setVisibility(View.GONE);
                    listView.setVisibility(View.GONE);
                }
            }
        });
    }
}