com.uet.trungthao.sunshine.app.ForecastFragment.java Source code

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Here is the source code for com.uet.trungthao.sunshine.app.ForecastFragment.java

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/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.uet.trungthao.sunshine.app;

import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.Loader;
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.ListView;

import com.uet.trungthao.sunshine.app.data.WeatherContract;

/**
 * Encapsulates fetching the forecast and displaying it as a {@link ListView} layout.
 */
public class ForecastFragment extends Fragment implements LoaderManager.LoaderCallbacks {

    private ForecastAdapter mForecastAdapter;

    private static final String[] FORECAST_COLUMNS = {
            WeatherContract.WeatherEntry.TABLE_NAME + "." + WeatherContract.WeatherEntry._ID,
            WeatherContract.WeatherEntry.COLUMN_DATE, WeatherContract.WeatherEntry.COLUMN_SHORT_DESC,
            WeatherContract.WeatherEntry.COLUMN_MAX_TEMP, WeatherContract.WeatherEntry.COLUMN_MIN_TEMP,
            WeatherContract.LocationEntry.COLUMN_LOCATION_SETTING, WeatherContract.WeatherEntry.COLUMN_WEATHER_ID,
            WeatherContract.LocationEntry.COLUMN_COORD_LAT, WeatherContract.LocationEntry.COLUMN_COORD_LONG };

    static final int COL_WEATHER_ID = 0;
    static final int COL_WEATHER_DATE = 1;
    static final int COL_WEATHER_DESC = 2;
    static final int COL_WEATHER_MAX_TEMP = 3;
    static final int COL_WEATHER_MIN_TEMP = 4;
    static final int COL_LOCATION_SETTING = 5;
    static final int COL_WEATHER_CONDITION_ID = 6;
    static final int COL_COORD_LAT = 7;
    static final int COL_COORD_LONG = 8;

    public ForecastFragment() {
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Add this line in order for this fragment to handle menu events.
        setHasOptionsMenu(true);
    }

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_refresh) {
            updateWeather();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public View onCreateView(final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

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

        View rootView = inflater.inflate(R.layout.fragment_main, container, false);

        // Get a reference to the ListView, and attach this adapter to it.
        ListView listView = (ListView) rootView.findViewById(R.id.listview_forecast);
        listView.setAdapter(mForecastAdapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Cursor cursor = (Cursor) adapterView.getItemAtPosition(i);
                if (cursor != null) {
                    String locationSetting = Utility.getPreferredLocation(getActivity());
                    Intent intent = new Intent(getActivity(), DetailActivity.class);
                    intent.setData(WeatherContract.WeatherEntry.buildWeatherLocationWithDate(locationSetting,
                            cursor.getLong(COL_WEATHER_DATE)));
                    startActivity(intent);
                }
            }
        });

        return rootView;
    }

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

    void onLocationChange() {
        updateWeather();
        getLoaderManager().restartLoader(0, null, this);
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        getLoaderManager().initLoader(0, null, this);
    }

    @Override
    public Loader 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(getContext(), weatherForLocationUri, FORECAST_COLUMNS,
                null, null, sortOrder);
    }

    @Override
    public void onLoadFinished(Loader loader, Object data) {
        mForecastAdapter.swapCursor((Cursor) data);
    }

    @Override
    public void onLoaderReset(Loader loader) {
        mForecastAdapter.swapCursor(null);
    }
}