ListFragment.java

abstract public class ListFragment<ViewHolderType extends RecyclerView.ViewHolder, ModelType> extends BaseFragment {
    /**
     * Views
     */
    @InjectView(R.id.list) RecyclerView mRecyclerView;
    @InjectView(R.id.progress_view) ProgressBar mProgressView;
    @InjectView(R.id.empty) ViewStub mEmpty;
    @InjectView(R.id.error_view) ErrorView mErrorView;

    /**
     * Injected data
     */
    @Inject Picasso mPicasso;
    @Inject ApiManager mApiManager;

    /**
     * Data
     */
    Subscription mSubscription = Subscriptions.empty();
    ListAdapter<ViewHolderType, ModelType> mAdapter;
    LinearLayoutManager mLinearLayoutManager;

    public ListFragment() {
        setRetainInstance(true);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_recycler_view, container, false);

        ButterKnife.inject(this, view);

        return view;
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        setupData();
    }

    @Override
    public void onDestroyView() {
        mSubscription.unsubscribe();
        ButterKnife.reset(this);

        super.onDestroyView();
    }

    private void setupData() {
        showProgress();

        mAdapter = getAdapter();
        mRecyclerView.setHasFixedSize(true);
        mLinearLayoutManager = new LinearLayoutManager(getActivity());
        mRecyclerView.setLayoutManager(mLinearLayoutManager);
        mRecyclerView.setAdapter(mAdapter);

        fetchData();

        mAdapter.setOnItemClickListener(new OnRecyclerViewItemClickListener<ModelType>() {
            @Override public void onItemClick(View view, ModelType dataItem, int position) {
                onDataItemClicked(dataItem);
            }
        });

        mErrorView.setOnRetryListener(new RetryListener() {
            @Override
            public void onRetry() {
                showProgress();
                fetchData();
            }
        });
    }

    protected abstract void onDataItemClicked(ModelType dataItem);
    protected abstract ListAdapter<ViewHolderType, ModelType> getAdapter();
    protected abstract void fetchData();

    private void showProgress() {
        hideEmptyView();
        hideErrorView();

        mRecyclerView.setVisibility(View.GONE);
        mProgressView.setVisibility(View.VISIBLE);
    }

    private void hideProgress() {
        mRecyclerView.setVisibility(View.VISIBLE);
        mProgressView.setVisibility(View.GONE);
    }

    private void showEmptyView() {
        mEmpty.setVisibility(View.VISIBLE);
    }

    private void hideEmptyView() {
        if (mEmpty.getVisibility() == View.VISIBLE) {
            mEmpty.setVisibility(View.GONE);
        }
    }

    private void showErrorView() {
        mErrorView.setVisibility(View.VISIBLE);
    }

    private void hideErrorView() {
        if (mErrorView.getVisibility() == View.VISIBLE) {
            mErrorView.setVisibility(View.GONE);
        }
    }
}