DiningFragment.java

package com.pennapps.labs.pennmobile;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.pennapps.labs.pennmobile.adapters.DiningAdapter;
import com.pennapps.labs.pennmobile.api.Labs;
import com.pennapps.labs.pennmobile.classes.DiningHall;
import com.pennapps.labs.pennmobile.classes.Venue;

import java.util.List;

import butterknife.Bind;
import butterknife.ButterKnife;
import rx.Observable;
import rx.functions.Action1;
import rx.functions.Func1;

public class DiningFragment extends ListFragment {

    private Labs mLabs;
    private ListView mListView;
    private MainActivity mActivity;
    @Bind(R.id.loadingPanel) RelativeLayout loadingPanel;
    @Bind(R.id.no_results) TextView no_results;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mLabs = MainActivity.getLabsInstance();
        mActivity = (MainActivity) getActivity();
        mActivity.closeKeyboard();
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        setHasOptionsMenu(true);
        mListView = getListView();
    }

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle presses on the action bar items
        switch (item.getItemId()) {
            case android.R.id.home:
                mActivity.onBackPressed();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        mActivity.getActionBarToggle().setDrawerIndicatorEnabled(false);
        mActivity.getActionBarToggle().syncState();
        Fragment fragment = new MenuFragment();

        Bundle args = new Bundle();
        args.putParcelable("DiningHall", ((DiningAdapter.ViewHolder) v.getTag()).hall);
        fragment.setArguments(args);

        FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.dining_fragment, fragment)
                .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
                .addToBackStack(null)
                .commitAllowingStateLoss();
    }

    private void getDiningHalls() {
        mLabs.venues()
                .flatMap(new Func1<List<Venue>, Observable<Venue>>() {
                    @Override
                    public Observable<Venue> call(List<Venue> venues) {
                        return Observable.from(venues);
                    }
                })
                .flatMap(new Func1<Venue, Observable<DiningHall>>() {
                    @Override
                    public Observable<DiningHall> call(Venue venue) {
                        DiningHall hall = new DiningHall(venue.id, venue.name, venue.isResidential(), venue.getHours(), venue);
                        return Observable.just(hall);
                    }
                })
                .toList()
                .subscribe(new Action1<List<DiningHall>>() {
                    @Override
                    public void call(final List<DiningHall> diningHalls) {
                        mActivity.runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                if (loadingPanel != null) {
                                    DiningAdapter adapter = new DiningAdapter(mActivity, diningHalls);
                                    mListView.setAdapter(adapter);
                                    loadingPanel.setVisibility(View.GONE);
                                }
                            }
                        });
                    }
                }, new Action1<Throwable>() {
                    @Override
                    public void call(Throwable throwable) {
                        mActivity.runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                if (loadingPanel != null) {
                                    loadingPanel.setVisibility(View.GONE);
                                }
                                if (no_results != null) {
                                    no_results.setVisibility(View.VISIBLE);
                                }
                            }
                        });
                    }
                });
    }

    @Override
    public void onResume() {
        super.onResume();
        getActivity().setTitle(R.string.dining);
        mActivity.setNav(R.id.nav_dining);
    }

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