天气预报的实现分析
来源：互联网 发布：js qq在线客服插件 编辑：程序博客网 时间：2024/05/21 06:41
1.运行效果图
2.核心代码
<span style="color:#3366FF;">WeatherActivity。java</span>
MainActivity
public class WeatherActivity extends Activity implements OnClickListener{ private LinearLayout weatherInfoLayout; /** * 用于显示城市名 */ private TextView cityNameText; /** * 用于显示发布时间 */ private TextView publishText; /** * 用于显示天气描述信息 */ private TextView weatherDespText; /** * 用于显示气温1 */ private TextView temp1Text; /** * 用于显示气温2 */ private TextView temp2Text; /** * 用于显示当前日期 */ private TextView currentDateText; /** * 切换城市按钮 */ private Button switchCity; /** * 更新天气按钮 */ private Button refreshWeather; @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 = (Button) findViewById(R.id.switch_city); refreshWeather = (Button) findViewById(R.id.refresh_weather); switchCity.setOnClickListener(this); refreshWeather.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.switch_city: Intent intent = new Intent(this, ChooseAreaActivity.class); intent.putExtra("from_weather_activity", 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() { @Override 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(); } }); } } @Override 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); } } <pre name="code" class="java"><span style="color:#6666CC;">ChooseAreaActivity.java</span></pre><pre name="code" class="java">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 CoolWeatherDB coolWeatherDB; private List<String> dataList = new ArrayList<String>(); /** * 省列表 */ private List<Province> provinceList; /** * 市列表 */ private List<City> cityList; /** * 县列表 */ private List<County> countyList; /** * 选中的省份 */ private Province selectedProvince; /** * 选中的城市 */ private City selectedCity; /** * 当前选中的级别 */ private int currentLevel; /** * 是否从WeatherActivity中跳转过来。 */ private boolean isFromWeatherActivity; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); isFromWeatherActivity = getIntent().getBooleanExtra( "from_weather_ activity", false); SharedPreferences prefs = PreferenceManager .getDefaultSharedPreferences(this); // 已经选择了城市且不是从WeatherActivity跳转过来，才会直接跳转到WeatherActivity 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); coolWeatherDB = CoolWeatherDB.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 = coolWeatherDB.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 = coolWeatherDB.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 = coolWeatherDB.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(coolWeatherDB, response); } else if ("city".equals(type)) { result = Utility.handleCitiesResponse(coolWeatherDB, response, selectedProvince.getId()); } else if ("county".equals(type)) { result = Utility.handleCountiesResponse(coolWeatherDB, 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(); } } }</pre><span style="color:#FF0000">weather_layout.java</span><br> <pre name="code" class="java"><?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/home" /> <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/refresh" /> </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> </pre><br> <br> <pre></pre> <h2><a name="t4"></a>三、出现的问题</h2> <p>由于没能找到“刷新”和“返回”的图标，随手找到两个两个图片就应用上了。</p> <p>文字排版歪了。<br> </p> <pre name="code" class="java"><p></p><pre></pre> <pre></pre> </pre> 3.实验总结
该实验中需编辑代码较多，编译时出现些许问题，经过改正粗略解决。实验需要用到网络中的实时信息，是实验的另一难点。通过此次实验，对安卓有了进一步了解。
0 0
- 天气预报的实现分析
- 天气预报的实现分析
- 天气预报模块的实现分析
- Android项目之天气预报 的实现分析
- 实战 Walker 之天气预报的实现分析
- 案例3_天气预报的实现分析
- 天气预报的实现
- 天气预报模块的实现
- 利用中央气象台的天气预报API实现天气预报
- 实现自己的天气预报(源代码)
- AJAX实现的天气预报查看
- 实现地图天气预报的显示
- 天气预报简单接口的实现
- 实现简单的天气预报功能
- 天气预报实现
- 根据IP获取当地天气预报的实现
- 根据IP获取当地天气预报的实现
- 用.Net的Web服务实现天气预报
- Android点击应用图标出现闪屏的处理
- Java基础之方法重载和方法重写
- 挑7（练习用）
- Jersey支持spring3配置
- 73. Set Matrix Zeroes
- 天气预报的实现分析
- Acitivty嵌套Fragment时 调用recreate的坑
- Android编码规范
- js中返回超链接中调用js。
- 第十三周项目4--Floyd算法的验证
- 第十六周项目四—— 英文单词的基数排序
- Java 代码性能优化
- 1Eclipse怎么查看某个断点的值，还可以通过什么快捷键查看 2debug查看某个变量的值，可能查看不全
- linux自动化安全基线脚本
