天气查看器

一、运行结果图

















二、.java文件

WeatherOpenHelper.java

package com.example.coolweather;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteDatabase.CursorFactory;

public class WeatherOpenHelper extends SQLiteOpenHelper{

//Province表
public static final String CREATE_PROVINCE = "create table Province ("
+ "id integer primary key autoincrement, "
+ "province_name text, "
+ "province_code text)";

//City表
public static final String CREATE_CITY = "create table City ("
+ "id integer primary key autoincrement, "
+ "city_name text, "
+ "city_code text, "
+ "province_id integer)";

//County表
public static final String CREATE_COUNTY = "create table County ("
+ "id integer primary key autoincrement, "
+ "county_name text, "
+ "county_code text, "
+ "city_id integer)";

public WeatherOpenHelper(Context context, String name,
CursorFactory factory, int version) {
super(context, name, factory, version);
// TODO Auto-generated constructor stub
}

@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL(CREATE_PROVINCE);  // 创建Province表
db.execSQL(CREATE_CITY);  // 创建City表
db.execSQL(CREATE_COUNTY);  // 创建County表
}

@Override
public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
// TODO Auto-generated method stub

}

}

Province.java

package com.example.coolweather.model;

public class Province {
private int id;
private String provinceName;
private String provinceCode;

public int getId(){
return id;
}
public void setId(int id) {
this.id = id;
}
public String getProvinceName() {
return provinceName;
}
public void setProvinceName(String provinceName) {
this.provinceName = provinceName;
}
public String getProvinceCode() {
return provinceCode;
}
public void setProvinceCode(String provinceCode) {
this.provinceCode = provinceCode;
}
}

City.java

package com.example.coolweather.model;

public class City {

private int id;
private String cityName;
private String cityCode;
private int provinceId;

public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCityName() {
return cityName;
}
public void setCityName(String cityName) {
this.cityName = cityName;
}
public String getCityCode() {
return cityCode;
}
public void setCityCode(String cityCode) {
this.cityCode = cityCode;
}
public int getProvinceId() {
return provinceId;
}
public void setProvinceId(int provinceId) {
this.provinceId = provinceId;
}
}

County.java

package com.example.coolweather.model;

public class County {

private int id;
private String countyName;
private String countyCode;
private int cityId;

public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCountyName() {
return countyName;
}
public void setCountyName(String countyName) {
this.countyName = countyName;
}
public String getCountyCode() {
return countyCode;
}
public void setCountyCode(String countyCode) {
this.countyCode = countyCode;
}
public int getCityId() {
return cityId;
}
public void setCityId(int cityId) {
this.cityId = cityId;
}
}

WeatherDB.java

package com.example.coolweather;

import java.util.ArrayList;
import java.util.List;

import com.example.coolweather.model.City;
import com.example.coolweather.model.County;
import com.example.coolweather.model.Province;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

public class WeatherDB {

//数据库名
public static final String DB_NAME = "weather";

//数据库版本
public static final int VERSION = 1;

private static WeatherDB weatherDB;

private SQLiteDatabase db;

//将构造方法私有化
private WeatherDB(Context context) {
WeatherOpenHelper dbHelper = new WeatherOpenHelper(context,
DB_NAME, null, VERSION);
db = dbHelper.getWritableDatabase();
}

//获取WeatherDB的实例
public synchronized static WeatherDB getInstance(Context context) {
if (weatherDB == null) {
weatherDB = new WeatherDB(context);
}
return weatherDB;
}

//将Province实例存储到数据库
public void saveProvince(Province province) {
if (province != null) {
ContentValues values = new ContentValues();
values.put("province_name", province.getProvinceName());
values.put("province_code", province.getProvinceCode());
db.insert("Province", null, values);
}
}

//从数据库读取全国所有的省份信息
public List<Province> loadProvinces() {
List<Province> list = new ArrayList<Province>();
Cursor cursor = db
.query("Province", null, null, null, null, null, null);
if (cursor.moveToFirst()) {
do {
Province province = new Province();
province.setId(cursor.getInt(cursor.getColumnIndex("id")));
province.setProvinceName(cursor.getString(cursor
.getColumnIndex("province_name")));
province.setProvinceCode(cursor.getString(cursor
.getColumnIndex("province_code")));
list.add(province);
} while (cursor.moveToNext());
}
return list;
}

//将City实例存储到数据库
public void saveCity(City city) {
if (city != null) {
ContentValues values = new ContentValues();
values.put("city_name", city.getCityName());
values.put("city_code", city.getCityCode());
values.put("province_id", city.getProvinceId());
db.insert("City", null, values);
}
}

//从数据库读取某省下所有的城市信息
public List<City> loadCities(int provinceId) {
List<City> list = new ArrayList<City>();
Cursor cursor = db.query("City", null, "province_id = ?",
new String[] { String.valueOf(provinceId) }, null, null, null);
if (cursor.moveToFirst()) {
do {
City city = new City();
city.setId(cursor.getInt(cursor.getColumnIndex("id")));
city.setCityName(cursor.getString(cursor
.getColumnIndex("city_name")));
city.setCityCode(cursor.getString(cursor
.getColumnIndex("city_code")));
city.setProvinceId(provinceId);
list.add(city);
} while (cursor.moveToNext());
}
return list;
}

//将County实例存储到数据库
public void saveCounty(County county) {
if (county != null) {
ContentValues values = new ContentValues();
values.put("county_name", county.getCountyName());
values.put("county_code", county.getCountyCode());
values.put("city_id", county.getCityId());
db.insert("County", null, values);
}
}

//从数据库读取某城市下所有的县信息
public List<County> loadCounties(int cityId) {
List<County> list = new ArrayList<County>();
Cursor cursor = db.query("County", null, "city_id = ?",
new String[] { String.valueOf(cityId) }, n
4000
ull, null, null);
if (cursor.moveToFirst()) {
do {
County county = new County();
county.setId(cursor.getInt(cursor.getColumnIndex("id")));
county.setCountyName(cursor.getString(cursor
.getColumnIndex("county_name")));
county.setCountyCode(cursor.getString(cursor
.getColumnIndex("county_code")));
county.setCityId(cityId);
list.add(county);
} while (cursor.moveToNext());
}
return list;
}

}

HttpUtil.java

package com.example.coolweather.util;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpUtil {

public static void sendHttpRequest(final String address,
final HttpCallbackListener listener) {
new Thread(new Runnable() {
@Override
public void run() {
HttpURLConnection connection = null;
try {
URL url = new URL(address);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setConnectTimeout(8000);
connection.setReadTimeout(8000);
InputStream in = connection.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder response = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
response.append(line);
}
if (listener != null) {
// 回调onFinish()方法
listener.onFinish(response.toString());
}
} catch (Exception e) {
if (listener != null) {
// 回调onError()方法
listener.onError(e);
}
} finally {
if (connection != null) {
connection.disconnect();
}
}
}
}).start();
}
}

HttpCallbackListener.java

package com.example.coolweather.util;

public interface HttpCallbackListener {

void onFinish(String response);

void onError(Exception e);

}

Utility.java

package com.example.coolweather.util;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import org.json.JSONException;
import org.json.JSONObject;
import com.example.coolweather.WeatherDB;
import com.example.coolweather.model.City;
import com.example.coolweather.model.County;
import com.example.coolweather.model.Province;
import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.text.TextUtils;

public class Utility {

//解析和处理服务器返回的省级数据
public synchronized static boolean handleProvincesResponse(WeatherDB weatherDB, String response) {
if (!TextUtils.isEmpty(response)) {
String[] allProvinces = response.split(",");
if (allProvinces != null && allProvinces.length > 0) {
for (String p : allProvinces) {
String[] array = p.split("\\|");
Province province = new Province();
province.setProvinceCode(array[0]);
province.setProvinceName(array[1]);
// 将解析出来的数据存储到Province表
weatherDB.saveProvince(province);
}
return true;
}
}
return false;
}

//解析和处理服务器返回的市级数据
public static boolean handleCitiesResponse(WeatherDB weatherDB,
String response, int provinceId) {
if (!TextUtils.isEmpty(response)) {
String[] allCities = response.split(",");
if (allCities != null && allCities.length > 0) {
for (String c : allCities) {
String[] array = c.split("\\|");
City city = new City();
city.setCityCode(array[0]);
city.setCityName(array[1]);
city.setProvinceId(provinceId);
// 将解析出来的数据存储到City表
weatherDB.saveCity(city);
}
return true;
}
}
return false;
}

//解析和处理服务器返回的县级数据
public static boolean handleCountiesResponse(WeatherDB weatherDB,
String response, int cityId) {
if (!TextUtils.isEmpty(response)) {
String[] allCounties = response.split(",");
if (allCounties != null && allCounties.length > 0) {
for (String c : allCounties) {
String[] array = c.split("\\|");
County county = new County();
county.setCountyCode(array[0]);
county.setCountyName(array[1]);
county.setCityId(cityId);
// 将解析出来的数据存储到County表
weatherDB.saveCounty(county);
}
return true;
}
}
return false;
}

//解析服务器返回的JSON数据，并将解析出的数据存储到本地
public static void handleWeatherResponse(Context context, String response) {
try {
JSONObject jsonObject = new JSONObject(response);
JSONObject weatherInfo = jsonObject.getJSONObject("weatherinfo");
String cityName = weatherInfo.getString("city");
String weatherCode = weatherInfo.getString("cityid");
String temp1 = weatherInfo.getString("temp1");
String temp2 = weatherInfo.getString("temp2");
String weatherDesp = weatherInfo.getString("weather");
String publishTime = weatherInfo.getString("ptime");
saveWeatherInfo(context, cityName, weatherCode, temp1, temp2,
weatherDesp, publishTime);
} catch (JSONException e) {
e.printStackTrace();
}
}

//将服务器返回的所有天气信息存储到SharedPreferences文件中
public static void saveWeatherInfo(Context context, String cityName, String weatherCode, String temp1, String temp2, String weatherDesp, String publishTime) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy年M月d日", Locale.CHINA);
SharedPreferences.Editor editor = PreferenceManager
.getDefaultSharedPreferences(context).edit();
editor.putBoolean("city_selected", true);
editor.putString("city_name", cityName);
editor.putString("weather_code", weatherCode);
editor.putString("temp1", temp1);
editor.putString("temp2", temp2);
editor.putString("weather_desp", weatherDesp);
editor.putString("publish_time", publishTime);
editor.putString("current_date", sdf.format(new Date()));
editor.commit();
}

}

ChooseAreaActivity.java

package com.example.coolweather;

import java.util.ArrayList;
import java.util.List;

import com.example.coolweather.model.City;
import com.example.coolweather.model.County;
import com.example.coolweather.model.Province;
import com.example.coolweather.util.HttpCallbackListener;
import com.example.coolweather.util.HttpUtil;
import com.example.coolweather.util.Utility;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.text.TextUtils;
import android.view.Window;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class ChooseAreaActivity extends Activity {

public static final int LEVEL_PROVINCE = 0;
public static final int LEVEL_CITY = 1;
public static final int LEVEL_COUNTY = 2;

private ProgressDialog progressDialog;
private TextView titleText;
private ListView listView;
private ArrayAdapter<String> adapter;
private WeatherDB weatherDB;
private List<String> dataList = new ArrayList<String>();
private List<Province> provinceList;// 省列表
private List<City> cityList;// 市列表
private List<County> countyList;// 县列表
private Province selectedProvince;// 选中的省份
private City selectedCity;// 选中的城市
private int currentLevel;// 当前选中的级别

private boolean isFromWeatherActivity;// 是否从WeatherActivity中跳转过来

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
isFromWeatherActivity = getIntent().getBooleanExtra(
"from_weather_ activity", false);
SharedPreferences prefs = PreferenceManager
.getDefaultSharedPreferences(this);
if (prefs.getBoolean("city_selected", false) && !isFromWeatherActivity) {
Intent intent = new Intent(this, WeatherActivity.class);
startActivity(intent);
finish();
return;
}
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.choose_area);

listView = (ListView) findViewById(R.id.list_view);
titleText = (TextView) findViewById(R.id.title_text);
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, dataList);
listView.setAdapter(adapter);
weatherDB = WeatherDB.getInstance(this);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View view, int index,
long arg3) {
if (currentLevel == LEVEL_PROVINCE) {
selectedProvince = provinceList.get(index);
queryCities();
} else if (currentLevel == LEVEL_CITY) {
selectedCity = cityList.get(index);
queryCounties();
} else if (currentLevel == LEVEL_COUNTY) {
String countyCode = countyList.get(index).getCountyCode();
Intent intent = new Intent(ChooseAreaActivity.this,
WeatherActivity.class);
intent.putExtra("county_code", countyCode);
startActivity(intent);
finish();
}
}
});
queryProvinces(); // 加载省级数据
}

// 查询全国所有的省，优先从数据库查询，如果没有查询到再去服务器上查询
private void queryProvinces() {
provinceList = weatherDB.loadProvinces();
if (provinceList.size() > 0) {
dataList.clear();
for (Province province : provinceList) {
dataList.add(province.getProvinceName());
}
adapter.notifyDataSetChanged();
listView.setSelection(0);
titleText.setText("中国");
currentLevel = LEVEL_PROVINCE;
} else {
queryFromServer(null, "province");
}
}

// 查询选中省内所有的市，优先从数据库查询，如果没有查询到再去服务器上查询
private void queryCities() {
cityList = weatherDB.loadCities(selectedProvince.getId());
if (cityList.size() > 0) {
dataList.clear();
for (City city : cityList) {
dataList.add(city.getCityName());
}
adapter.notifyDataSetChanged();
listView.setSelection(0);
titleText.setText(selectedProvince.getProvinceName());
currentLevel = LEVEL_CITY;
} else {
queryFromServer(selectedProvince.getProvinceCode(), "city");
}
}

// 查询选中市内所有的县，优先从数据库查询，如果没有查询到再去服务器上查询
private void queryCounties() {
countyList = weatherDB.loadCounties(selectedCity.getId());
if (countyList.size() > 0) {
dataList.clear();
for (County county : countyList) {
dataList.add(county.getCountyName());
}
adapter.notifyDataSetChanged();
listView.setSelection(0);
titleText.setText(selectedCity.getCityName());
currentLevel = LEVEL_COUNTY;
} else {
queryFromServer(selectedCity.getCityCode(), "county");
}
}

// 根据传入的代号和类型从服务器上查询省市县数据
private void queryFromServer(final String code, final String type) {
String address;
if (!TextUtils.isEmpty(code)) {
address = "http://www.weather.com.cn/data/list3/city" + code
+ ".xml";
} else {
address = "http://www.weather.com.cn/data/list3/city.xml";
}
showProgressDialog();
HttpUtil.sendHttpRequest(address, new HttpCallbackListener() {
@Override
public void onFinish(String response) {
boolean result = false;
if ("province".equals(type)) {
result = Utility.handleProvincesResponse(weatherDB,
response);
} else if ("city".equals(type)) {
result = Utility.handleCitiesResponse(weatherDB, response,
selectedProvince.getId());
} else if ("county".equals(type)) {
result = Utility.handleCountiesResponse(weatherDB,
response, selectedCity.getId());
}
if (result) {
// 通过runOnUiThread()方法回到主线程处理逻辑
runOnUiThread(new Runnable() {
@Override
public void run() {
closeProgressDialog();
if ("province".equals(type)) {
queryProvinces();
} else if ("city".equals(type)) {
queryCities();
} else if ("county".equals(type)) {
queryCounties();
}
}
});
}
}

@Override
public void onError(Exception e) {
// 通过runOnUiThread()方法回到主线程处理逻辑
runOnUiThread(new Runnable() {
@Override
public void run() {
closeProgressDialog();
Toast.makeText(ChooseAreaActivity.this, "加载失败",
Toast.LENGTH_SHORT).show();
}
});
}
});
}

// 显示进度对话框
private void showProgressDialog() {
if (progressDialog == null) {
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("正在加载...");
progressDialog.setCanceledOnTouchOutside(false);
}
progressDialog.show();
}

// 关闭进度对话框
private void closeProgressDialog() {
if (progressDialog != null) {
progressDialog.dismiss();
}
}

// 捕获Back按键，根据当前的级别来判断，此时应该返回市列表、省列表、还是直接退出
@Override
public void onBackPressed() {
if (currentLevel == LEVEL_COUNTY) {
queryCities();
} else if (currentLevel == LEVEL_CITY) {
queryProvinces();
} else {
if (isFromWeatherActivity) {
Intent intent = new Intent(this, WeatherActivity.class);
startActivity(intent);
}
finish();
}
}
}

WeatherActivity.java

package com.example.coolweather;

import com.example.coolweather.service.AutoUpdateService;
import com.example.coolweather.util.HttpCallbackListener;
import com.example.coolweather.util.HttpUtil;
import com.example.coolweather.util.Utility;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.text.TextUtils;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

public class WeatherActivity extends Activity implements OnClickListener {

private LinearLayout weatherInfoLayout;
private TextView cityNameText;// 用于显示城市名
private TextView publishText;// 用于显示发布时间
private TextView weatherDespText;// 用于显示天气描述信息
private TextView temp1Text;// 用于显示气温1
private TextView temp2Text;// 用于显示气温2
private TextView currentDateText;// 用于显示当前日期
private Button switchCity;// 切换城市按钮
private Button refreshWeather;// 更新天气按钮

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.weather_layout);

// 初始化各控件
weatherInfoLayout = (LinearLayout) findViewById(R.id.weather_info_layout);
cityNameText = (TextView) findViewById(R.id.city_name);
publishText = (TextView) findViewById(R.id.publish_text);
weatherDespText = (TextView) findViewById(R.id.weather_desp);
temp1Text = (TextView) findViewById(R.id.temp1);
temp2Text = (TextView) findViewById(R.id.temp2);
currentDateText = (TextView) findViewById(R.id.current_date);
switchCity = (Button) findViewById(R.id.switch_city);
refreshWeather = (Button) findViewById(R.id.refresh_weather);
String countyCode = getIntent().getStringExtra("county_code");

if (!TextUtils.isEmpty(countyCode)) {
// 有县级代号时就去查询天气
publishText.setText("同步中...");
weatherInfoLayout.setVisibility(View.INVISIBLE);
cityNameText.setVisibility(View.INVISIBLE);
queryWeatherCode(countyCode);
} else {
// 没有县级代号时就直接显示本地天气
showWeather();
}
switchCity.setOnClickListener(this);
refreshWeather.setOnClickListener(this);
}

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.switch_city:
Intent intent = new Intent(this, ChooseAreaActivity.class);
intent.putExtra("from_weather_activity
c734
", true);
startActivity(intent);
finish();
break;
case R.id.refresh_weather:
publishText.setText("同步中...");
SharedPreferences prefs = PreferenceManager. getDefaultSharedPreferences(this);
String weatherCode = prefs.getString("weather_code", "");
if (!TextUtils.isEmpty(weatherCode)) {
queryWeatherInfo(weatherCode);
}
break;
default:
break;
}
}

// 查询县级代号所对应的天气代号。
private void queryWeatherCode(String countyCode) {
String address = "http://www.weather.com.cn/data/list3/city"
+ countyCode + ".xml";
queryFromServer(address, "countyCode");
}

//查询天气代号所对应的天气。
private void queryWeatherInfo(String weatherCode) {
String address = "http://www.weather.com.cn/data/cityinfo/"
+ weatherCode + ".html";
queryFromServer(address, "weatherCode");
}

//根据传入的地址和类型去向服务器查询天气代号或者天气信息。
private void queryFromServer(final String address, final String type) {
HttpUtil.sendHttpRequest(address, new HttpCallbackListener() {
public void onFinish(final String response) {
if ("countyCode".equals(type)) {
if (!TextUtils.isEmpty(response)) {
// 从服务器返回的数据中解析出天气代号
String[] array = response.split("\\|");
if (array != null && array.length == 2) {
String weatherCode = array[1];
queryWeatherInfo(weatherCode);
}
}
} else if ("weatherCode".equals(type)) {
// 处理服务器返回的天气信息
Utility.handleWeatherResponse(WeatherActivity.this,
response);
runOnUiThread(new Runnable() {
@Override
public void run() {
showWeather();
}
});
}
}

public void onError(Exception e) {
runOnUiThread(new Runnable() {
@Override
public void run() {
publishText.setText("同步失败");
}
});
}
});
}

//从SharedPreferences文件中读取存储的天气信息，并显示到界面上。
private void showWeather() {
SharedPreferences prefs = PreferenceManager
.getDefaultSharedPreferences(this);
cityNameText.setText(prefs.getString("city_name", ""));
temp1Text.setText(prefs.getString("temp1", ""));
temp2Text.setText(prefs.getString("temp2", ""));
weatherDespText.setText(prefs.getString("weather_desp", ""));
publishText.setText("今天" + prefs.getString("publish_time", "") + "发布");
currentDateText.setText(prefs.getString("current_date", ""));
weatherInfoLayout.setVisibility(View.VISIBLE);
cityNameText.setVisibility(View.VISIBLE);
Intent intent = new Intent(this, AutoUpdateService.class);
startService(intent);
}

}

AutoUpdateReceiver.java

package com.example.coolweather.receive;

import com.example.coolweather.service.AutoUpdateService;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class AutoUpdateReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent arg1) {
// TODO Auto-generated method stub
Intent i = new Intent(context, AutoUpdateService.class);
context.startService(i);
}

}

AutoUpdateService.java

package com.example.coolweather.service;

import com.example.coolweather.receive.AutoUpdateReceiver;
import com.example.coolweather.util.HttpCallbackListener;
import com.example.coolweather.util.HttpUtil;
import com.example.coolweather.util.Utility;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.IBinder;
import android.os.SystemClock;
import android.preference.PreferenceManager;

public class AutoUpdateService extends Service {

@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
new Thread(new Runnable() {
@Override
public void run() {
updateWeather();
}
}).start();
AlarmManager manager = (AlarmManager) getSystemService(ALARM_SERVICE);
int anHour = 8 * 60 * 60 * 1000; // 这是8小时的毫秒数
long triggerAtTime = SystemClock.elapsedRealtime() + anHour;
Intent i = new Intent(this, AutoUpdateReceiver.class);
PendingIntent pi = PendingIntent.getBroadcast(this, 0, i, 0);
manager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerAtTime, pi);
return super.onStartCommand(intent, flags, startId);
}

/**
* 更新天气信息。
*/
private void updateWeather() {
SharedPreferences prefs = PreferenceManager. getDefaultSharedPreferences(this);
String weatherCode = prefs.getString("weather_code", "");
String address = "http://www.weather.com.cn/data/cityinfo/" + weatherCode + ".html";
HttpUtil.sendHttpRequest(address, new HttpCallbackListener() {
@Override
public void onFinish(String response) {
Utility.handleWeatherResponse(AutoUpdateService.this, response);
}

@Override
public void onError(Exception e) {
e.printStackTrace();
}
});
}

}

三、.xml文件

choose_area.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#484E61" >

<TextView
android:id="@+id/title_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:textColor="#fff"
android:textSize="24sp" />
</RelativeLayout>

<ListView
android:id="@+id/list_view"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ListView>

</LinearLayout>

weatherlayout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#484E61" >
<Button
android:id="@+id/switch_city"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:background="@drawable/icons_weather_city" />
<TextView
android:id="@+id/city_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:textColor="#fff"
android:textSize="24sp" />
<Button
android:id="@+id/refresh_weather"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:background="@drawable/icons_menu_weather" />
</RelativeLayout>

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#27A5F9" >

<TextView
android:id="@+id/publish_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:textColor="#FFF"
android:textSize="18sp" />

<LinearLayout
android:id="@+id/weather_info_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:orientation="vertical" >

<TextView
android:id="@+id/current_date"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:gravity="center"
android:textColor="#FFF"
android:textSize="18sp" />

<TextView
android:id="@+id/weather_desp"
android:layout_width="wrap_content"
android:layout_height="60dp"
android:layout_gravity="center_horizontal"
android:gravity="center"
android:textColor="#FFF"
android:textSize="40sp" />

<LinearLayout
android:layout_width="wrap_content"
android:layout_height="60dp"
android:layout_gravity="center_horizontal"
android:orientation="horizontal" >

<TextView
android:id="@+id/temp1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:textColor="#FFF"
android:textSize="40sp" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:text="~"
android:textColor="#FFF"
android:textSize="40sp" />

<TextView
android:id="@+id/temp2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:textColor="#FFF"
android:textSize="40sp" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>

</LinearLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.coolweather"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="20" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.coolweather.ChooseAreaActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.coolweather.WeatherActivity"
android:label="@string/app_name" >
</activity>

<service android:name="com.example.coolweather.service.AutoUpdateService"></service>
<receiver android:name="com.example.coolweather.receiver.AutoUpdateReceiver"></receiver>
</application>

</manifest>

四、出现的问题：
            一开始的地区选择运行正常，但是不能同步，一直出现“正在同步···”，经改正（我也不知道到底改了什么）出现了天气情况，但是不准确，明明0~4度，但是显示1~18度，好无奈。。。