BaseUsersListFragment.java

package com.alorma.github.ui.fragment.users;

import android.support.annotation.StyleRes;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import com.alorma.github.R;
import com.alorma.github.sdk.services.client.GithubListClient;
import com.alorma.github.ui.adapter.users.UsersAdapter;
import com.alorma.github.ui.fragment.base.LoadingListFragment;
import com.alorma.gitskarios.core.Pair;
import com.mikepenz.octicons_typeface_library.Octicons;
import core.User;
import java.util.List;
import rx.Observer;
import rx.android.schedulers.AndroidSchedulers;
import rx.schedulers.Schedulers;

public abstract class BaseUsersListFragment extends LoadingListFragment<UsersAdapter> {

  @StyleRes
  @Override
  protected int getLightTheme() {
    return R.style.AppTheme_People;
  }

  @StyleRes
  @Override
  protected int getDarkTheme() {
    return R.style.AppTheme_Dark_People;
  }

  protected void setAction(GithubListClient<List<User>> userFollowersClient, boolean refresh) {
    startRefresh();
    userFollowersClient.observable().subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(pair -> onUsersLoaded(pair, refresh), throwable -> {
    });
  }

  private void onUsersLoaded(Pair<List<User>, Integer> pair, boolean refresh) {
    setPage(pair.second);
    List<User> users = pair.first;

    if (users.size() > 0) {
      hideEmpty();
      if (refresh || getAdapter() == null) {
        UsersAdapter adapter = new UsersAdapter(LayoutInflater.from(getActivity()));
        adapter.addAll(users);
        setAdapter(adapter);
      } else {
        getAdapter().addAll(users);
      }
    } else if (getAdapter() == null || getAdapter().getItemCount() == 0) {
      setEmpty();
    } else {
      getAdapter().clear();
      setEmpty();
    }
    stopRefresh();
  }

  @Override
  protected RecyclerView.LayoutManager getLayoutManager() {
    return new GridLayoutManager(getActivity(), getResources().getInteger(R.integer.grid_layout_columns));
  }

  @Override
  protected Octicons.Icon getNoDataIcon() {
    return Octicons.Icon.oct_octoface;
  }
}