ForecastFragment.java

package com.example.android.sunshine.app;

import android.support.v4.app.LoaderManager;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Intent;
import android.content.Loader;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.Fragment;
import android.text.format.Time;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

import com.example.android.sunshine.app.data.WeatherContract;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * Created by justinr on 3/9/16.
 */
public class ForecastFragment extends Fragment
    implements LoaderManager.LoaderCallbacks<Cursor> {

    private static final int FORECAST_LOADER = 0;
    private ForecastAdapter mForecastAdapter;

    public ForecastFragment() {
    }

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

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.forecastfragment, menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == R.id.action_refresh) {
            updateWeather();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

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

        mForecastAdapter = new ForecastAdapter(getActivity(), null, 0);

        ListView listView = (ListView) rootView.findViewById(
                R.id.listview_forecast);
        listView.setAdapter(mForecastAdapter);

        return rootView;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        getLoaderManager().initLoader(FORECAST_LOADER, null, this);
        super.onActivityCreated(savedInstanceState);
    }

    private void updateWeather() {
        FetchWeatherTask weatherTask = new FetchWeatherTask(getActivity());
        String location = Utility.getPreferredLocation(getActivity());
        weatherTask.execute(location + ",us");
    }

    @Override
    public void onStart() {
        super.onStart();
        updateWeather();
    }

    @Override
    public android.support.v4.content.Loader<Cursor> onCreateLoader(int id, Bundle args) {
        String locationSetting = Utility.getPreferredLocation(getActivity());

        // Sort order:  Ascending, by date.
        String sortOrder = WeatherContract.WeatherEntry.COLUMN_DATE + " ASC";
        Uri weatherForLocationUri = WeatherContract.WeatherEntry.buildWeatherLocationWithStartDate(
                locationSetting, System.currentTimeMillis());

        return new android.support.v4.content.CursorLoader(getActivity(),
                weatherForLocationUri,
                null,
                null,
                null,
                sortOrder);
    }

    @Override
    public void onLoadFinished(android.support.v4.content.Loader<Cursor> loader, Cursor data) {
        mForecastAdapter.swapCursor(data);
    }

    @Override
    public void onLoaderReset(android.support.v4.content.Loader<Cursor> loader) {
        mForecastAdapter.swapCursor(null);
    }
}