模拟墨迹桌面小工具

        相信墨迹天气，大家都见过，他在时间显示和天气界面上，很吸引人，今天我就来模仿一下墨迹天气的桌面组件，但是由于谷歌在天朝频频被墙的缘故，所以我在今天测试的时候，解析xml文件的网页打不开，所以天气显示出了点问题，希望大家能理解，谢谢。(今天9月24日修改为解析中国天气网获取天气了，而且修改组件在桌面居中显示)。

        老规矩，先分享源代码：http://download.csdn.net/detail/weidi1989/4597809

        2013年07月06日更新版本：http://download.csdn.net/detail/weidi1989/5712051

        好了，废话不多说，先上效果图：

 

再来看一下整个小项目的主体结构：

首先先声明一个桌面布局的xml文件，即app.xml：

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  1. <?xmlversion="1.0"encoding="utf-8"?> 
  2. <!-- 
  3.          指定该桌面组件的基本配置信息： 
  4.     initialLayout：初始时显示的布局 
  5.     minWidth：桌面小控件的最小高度。 
  6.     minWidth：桌面小控件的最小宽度。 
  7.     updatePeriodMillis：更新频率 
  8. --> 
  9. <appwidget-providerxmlns:android="http://schemas.android.com/apk/res/android" 
  10.     android:initialLayout="@layout/main" 
  11.     android:minHeight="150dp" 
  12.     android:minWidth="200dp" 
  13.     android:updatePeriodMillis="0"> 
  14.  
  15. </appwidget-provider>  
<?xml version="1.0" encoding="utf-8"?>
<!--
         指定该桌面组件的基本配置信息：
	initialLayout：初始时显示的布局
	minWidth：桌面小控件的最小高度。
	minWidth：桌面小控件的最小宽度。
	updatePeriodMillis：更新频率
-->
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
    android:initialLayout="@layout/main"
    android:minHeight="150dp"
    android:minWidth="200dp"
    android:updatePeriodMillis="0" >

</appwidget-provider>

然后要在manifest文件中声明：

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  1. <manifestxmlns:android="http://schemas.android.com/apk/res/android" 
  2.     package="com.way.apptest" 
  3.     android:versionCode="1" 
  4.     android:versionName="1.0"> 
  5.  
  6.     <uses-sdk 
  7.         android:minSdkVersion="8" 
  8.         android:targetSdkVersion="15"/> 
  9.  
  10.     <uses-permissionandroid:name="android.permission.INTERNET"/> 
  11.  
  12.     <application 
  13.         android:icon="@drawable/ic_launcher" 
  14.         android:label="@string/app_name" 
  15.         android:theme="@style/AppTheme"> 
  16.         <activityandroid:name="com.way.apptest.MainActivity"> 
  17.         </activity> 
  18.  
  19.         <receiverandroid:name="com.way.apptest.App"> 
  20.             <!-- 指定桌面小控件的meta-data --> 
  21.             <meta-data 
  22.                 android:name="android.appwidget.provider" 
  23.                 android:resource="@xml/app"/> 
  24.             <!-- 将该BroadcastReceiver当成桌面小控件 --> 
  25.             <intent-filter> 
  26.                 <actionandroid:name="android.appwidget.action.APPWIDGET_UPDATE"/> 
  27.             </intent-filter> 
  28.         </receiver> 
  29.  
  30.         <serviceandroid:name=".UpdateService"> 
  31.         </service> 
  32.     </application> 
  33.  
  34. </manifest>  
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.way.apptest"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity android:name="com.way.apptest.MainActivity" >
        </activity>

        <receiver android:name="com.way.apptest.App" >
            <!-- 指定桌面小控件的meta-data -->
            <meta-data
                android:name="android.appwidget.provider"
                android:resource="@xml/app" />
            <!-- 将该BroadcastReceiver当成桌面小控件 -->
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
            </intent-filter>
        </receiver>

        <service android:name=".UpdateService" >
        </service>
    </application>

</manifest>

主要代码：

一：定义一个App类继承AppWidgetProvider，然后再onUpdate方法中启动一个服务去更新时间和天气。

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  1. /**
  2. * @author way
  3. */ 
  4. publicclass App extends AppWidgetProvider { 
  5.     private Intent intent; 
  6.  
  7.     @Override 
  8.     publicvoid onUpdate(Context context, AppWidgetManager appWidgetManager, 
  9.             int[] appWidgetIds) { 
  10.         intent = new Intent(context, UpdateService.class); 
  11.         context.startService(intent); 
  12.         super.onUpdate(context, appWidgetManager, appWidgetIds); 
  13.     } 
  14.  
  15.     @Override 
  16.     publicvoid onDeleted(Context context, int[] appWidgetIds) { 
  17.         context.stopService(intent); 
  18.         super.onDeleted(context, appWidgetIds); 
  19.     } 
  20. }  
/**
 * @author way
 */
public class App extends AppWidgetProvider {
	private Intent intent;

	@Override
	public void onUpdate(Context context, AppWidgetManager appWidgetManager,
			int[] appWidgetIds) {
		intent = new Intent(context, UpdateService.class);
		context.startService(intent);
		super.onUpdate(context, appWidgetManager, appWidgetIds);
	}

	@Override
	public void onDeleted(Context context, int[] appWidgetIds) {
		context.stopService(intent);
		super.onDeleted(context, appWidgetIds);
	}
}

二：本项目中最重要的部分，在这个服务中，我们注册一个广播接收者去接受系统每分钟时间时间变化的广播，从而来更新桌面时间，这样更省电哦，需要注意的是：这个广播接收者必须在代码中注册，在Manifest文件中注册是没有效果的。更新天气，我是通过定义一个定时器，由用户设置时间间隔来更新天气信息。

[java] view plaincopyprint?
  1. package com.way.apptest; 
  2.  
  3. import java.text.SimpleDateFormat; 
  4. import java.util.Date; 
  5. import java.util.Timer; 
  6. import java.util.TimerTask; 
  7.  
  8. import android.app.AlertDialog; 
  9. import android.app.PendingIntent; 
  10. import android.app.Service; 
  11. import android.appwidget.AppWidgetManager; 
  12. import android.content.BroadcastReceiver; 
  13. import android.content.ComponentName; 
  14. import android.content.Context; 
  15. import android.content.DialogInterface; 
  16. import android.content.Intent; 
  17. import android.content.IntentFilter; 
  18. import android.net.ConnectivityManager; 
  19. import android.net.NetworkInfo; 
  20. import android.os.Handler; 
  21. import android.os.IBinder; 
  22. import android.os.Message; 
  23. import android.widget.RemoteViews; 
  24.  
  25. import com.way.getWeather.MyWeather; 
  26.  
  27. /**
  28. * @author way
  29. */ 
  30. publicclass UpdateService extends Service { 
  31.     privatestaticfinalint UPDATE = 0x123; 
  32.     private RemoteViews remoteViews; 
  33.     // 数字时间图片资源数组 
  34.     privateint[] imgs = { R.drawable.n0, R.drawable.n1, R.drawable.n2, 
  35.             R.drawable.n3, R.drawable.n4, R.drawable.n5, R.drawable.n6, 
  36.             R.drawable.n7, R.drawable.n8, R.drawable.n9, }; 
  37.     // 将显示小时、分钟的ImageView定义成数组 
  38.     privateint[] dateViews = { R.id.h1, R.id.h2, R.id.m1, R.id.m2 }; 
  39.     // 按照中国天气网的天气图片顺序排列好本地资源图片，我这里是随意的~嘿嘿 
  40.     privateint[] weatherImg = { R.drawable.sunny, R.drawable.cloudy, 
  41.             R.drawable.chance_of_rain, R.drawable.chance_of_sleet, 
  42.             R.drawable.chance_of_snow, R.drawable.chance_of_storm, 
  43.             R.drawable.clock1, R.drawable.fog, R.drawable.haze, 
  44.             R.drawable.mist, R.drawable.mostly_sunny, R.drawable.mostly_cloudy, 
  45.             R.drawable.lower, R.drawable.middle }; 
  46.     private Handler handler = new Handler() { 
  47.  
  48.         @Override 
  49.         publicvoid handleMessage(Message msg) { 
  50.             switch (msg.what) { 
  51.             case UPDATE: 
  52.                 // 更新天气 
  53.                 updateTime(); 
  54.                 updateWeather(); 
  55.                 break; 
  56.             } 
  57.         } 
  58.     }; 
  59.     // 广播接收者去接收系统每分钟的提示广播，来更新时间 
  60.     private BroadcastReceiver mTimePickerBroadcast = new BroadcastReceiver() { 
  61.  
  62.         @Override 
  63.         publicvoid onReceive(Context context, Intent intent) { 
  64.             updateTime(); 
  65.         } 
  66.     }; 
  67.  
  68.     privatevoid updateWeather() { 
  69.         // Weather w = new GetWeather().googleWeather(); 
  70.         // if (w != null) { 
  71.         // System.out.println("当前天气：" + w.getWeather() + ":" + w.getTemp_c() 
  72.         // + ":" + w.getIcon()); 
  73.         remoteViews.setTextViewText(R.id.condition, MyWeather.weather1); 
  74.         remoteViews.setTextViewText(R.id.tem, (MyWeather.temp1)); 
  75.         // 根据图片名，获取天气图片资源 
  76.         // remoteViews.setImageViewResource( 
  77.         // R.id.weather, 
  78.         // getApplicationContext().getResources().getIdentifier( 
  79.         // w.getIcon(), "drawable", "com.way.apptest")); 
  80.         if (MyWeather.img1 != null || !"".equals(MyWeather.img1))  
  81.             remoteViews.setImageViewResource(R.id.weather, 
  82.                     weatherImg[Integer.parseInt(MyWeather.img1)]); 
  83.         // 执行更新 
  84.         ComponentName componentName = new ComponentName( 
  85.                 getApplicationContext(), App.class); 
  86.         AppWidgetManager.getInstance(getApplicationContext()).updateAppWidget( 
  87.                 componentName, remoteViews); 
  88.     } 
  89.  
  90.     @Override 
  91.     public IBinder onBind(Intent intent) { 
  92.         returnnull; 
  93.     } 
  94.  
  95.     @Override 
  96.     publicvoid onCreate() { 
  97.         super.onCreate(); 
  98.         remoteViews = new RemoteViews(getApplication().getPackageName(), 
  99.                 R.layout.main);// 实例化RemoteViews 
  100.         if (isNetworkAvailable()) { 
  101.             MyWeather.getWeather();// json解析中国天气网天气 
  102.         } else { 
  103.             toast(); 
  104.         } 
  105.         updateTime();// 第一次运行时先更新一下时间和天气 
  106.         updateWeather(); 
  107.         // 点击天气图片，进入MainActivity 
  108.         Intent intent = new Intent(getApplicationContext(), MainActivity.class); 
  109.         PendingIntent pi = PendingIntent.getActivity(getApplicationContext(), 
  110.                 0, intent, 0); 
  111.         remoteViews.setOnClickPendingIntent(R.id.weather, pi); 
  112.  
  113.         // 定义一个定时器去更新天气。实际开发中更新时间间隔可以由用户设置， 
  114.         new Timer().scheduleAtFixedRate(new TimerTask() { 
  115.             @Override 
  116.             publicvoid run() { 
  117.                 Message msg = handler.obtainMessage(); 
  118.                 msg.what = UPDATE; 
  119.                 handler.sendMessage(msg); 
  120.             } 
  121.         }, 1, 3600 * 1000);// 每小时更新一次天气 
  122.     } 
  123.  
  124.     privatevoid updateTime() { 
  125.         Date date = new Date(); 
  126.         // 定义SimpleDateFormat对象 
  127.         SimpleDateFormat df = new SimpleDateFormat("HHmm"); 
  128.         // 将当前时间格式化成HHmm的形式 
  129.         String timeStr = df.format(date); 
  130.  
  131.         for (int i = 0; i < timeStr.length(); i++) { 
  132.             // 将第i个数字字符转换为对应的数字 
  133.             int num2 = Integer.parseInt(timeStr.substring(i, i + 1)); 
  134.             // 将第i个图片的设为对应的数字图片 
  135.             remoteViews.setImageViewResource(dateViews[i], imgs[num2]); 
  136.         } 
  137.         remoteViews.setTextViewText(R.id.city, MyWeather.city); 
  138.         remoteViews.setTextViewText(R.id.date, "0" + (date.getMonth() + 1) 
  139.                 + "-" + date.getDate() + " 周" + date.getDay()); 
  140.         ComponentName componentName = new ComponentName(getApplication(), 
  141.                 App.class); 
  142.         AppWidgetManager.getInstance(getApplication()).updateAppWidget( 
  143.                 componentName, remoteViews); 
  144.     } 
  145.  
  146.     @Override 
  147.     publicvoid onStart(Intent intent, int startId) { 
  148.         // 注册系统每分钟提醒广播（注意：这个广播只能在代码中注册） 
  149.         IntentFilter updateIntent = new IntentFilter(); 
  150.         updateIntent.addAction("android.intent.action.TIME_TICK"); 
  151.         registerReceiver(mTimePickerBroadcast, updateIntent); 
  152.         super.onStart(intent, startId); 
  153.     } 
  154.  
  155.     @Override 
  156.     publicvoid onDestroy() { 
  157.         // 注销系统的这个广播 
  158.         unregisterReceiver(mTimePickerBroadcast); 
  159.         //被系统干掉后，服务重启,做一次流氓软件,哈哈 
  160.         Intent intent = new Intent(getApplicationContext(), UpdateService.class); 
  161.         getApplication().startService(intent);  
  162.         super.onDestroy(); 
  163.     } 
  164.  
  165.     /**
  166.      * 判断手机网络是否可用
  167.      *
  168.      * @param context
  169.      * @return
  170.      */ 
  171.     privateboolean isNetworkAvailable() { 
  172.         ConnectivityManager mgr = (ConnectivityManager) getApplicationContext() 
  173.                 .getSystemService(Context.CONNECTIVITY_SERVICE); 
  174.         NetworkInfo[] info = mgr.getAllNetworkInfo(); 
  175.         if (info != null) { 
  176.             for (int i = 0; i < info.length; i++) { 
  177.                 if (info[i].getState() == NetworkInfo.State.CONNECTED) { 
  178.                     returntrue; 
  179.                 } 
  180.             } 
  181.         } 
  182.         returnfalse; 
  183.     } 
  184.     <p>/**
  185.   * 在非Activity中弹出对话框
  186.   *
  187.   * @param context
  188.   */ 
  189. privatevoid showDialog(final Context context) { 
  190.   // TODO Auto-generated method stub 
  191.   /* create ui */ 
  192.   final AlertDialog dialog; 
  193.   AlertDialog.Builder builder = new AlertDialog.Builder(context); 
  194.   builder.setTitle("提示").setMessage("WiFi连接不可用"); 
  195.   builder.setPositiveButton("前往打开", new OnClickListener() {</p><p>   publicvoid onClick(DialogInterface dialog, int which) { 
  196.     Intent go2wifi = new Intent( 
  197.       android.provider.Settings.ACTION_WIRELESS_SETTINGS); 
  198.     go2wifi.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
  199.     context.startActivity(go2wifi);</p><p>   } 
  200.   }).setNegativeButton("下次再说", null); 
  201.   dialog = builder.create(); 
  202.   dialog.getWindow() 
  203.     .setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); 
  204.   // d.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY); 
  205.   dialog.show();</p><p>  /* set size & pos */ 
  206.   WindowManager.LayoutParams lp = dialog.getWindow().getAttributes(); 
  207.   WindowManager wm = (WindowManager) context 
  208.     .getSystemService(Context.WINDOW_SERVICE); 
  209.   Display display = wm.getDefaultDisplay(); 
  210.   if (display.getHeight() > display.getWidth()) { 
  211.    // lp.height = (int) (display.getHeight() * 0.5); 
  212.    lp.width = (int) (display.getWidth() * 1.0); 
  213.   } else { 
  214.    // lp.height = (int) (display.getHeight() * 0.75); 
  215.    lp.width = (int) (display.getWidth() * 0.5); 
  216.   } 
  217.   dialog.getWindow().setAttributes(lp); 
  218. } 
  219. </p>//记得加上权限     <!-- 系统对话框权限 --> 
  220. //   <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/> 
  221.     }  
package com.way.apptest;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;

import android.app.AlertDialog;
import android.app.PendingIntent;
import android.app.Service;
import android.appwidget.AppWidgetManager;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.widget.RemoteViews;

import com.way.getWeather.MyWeather;

/**
 * @author way
 */
public class UpdateService extends Service {
	private static final int UPDATE = 0x123;
	private RemoteViews remoteViews;
	// 数字时间图片资源数组
	private int[] imgs = { R.drawable.n0, R.drawable.n1, R.drawable.n2,
			R.drawable.n3, R.drawable.n4, R.drawable.n5, R.drawable.n6,
			R.drawable.n7, R.drawable.n8, R.drawable.n9, };
	// 将显示小时、分钟的ImageView定义成数组
	private int[] dateViews = { R.id.h1, R.id.h2, R.id.m1, R.id.m2 };
	// 按照中国天气网的天气图片顺序排列好本地资源图片，我这里是随意的~嘿嘿
	private int[] weatherImg = { R.drawable.sunny, R.drawable.cloudy,
			R.drawable.chance_of_rain, R.drawable.chance_of_sleet,
			R.drawable.chance_of_snow, R.drawable.chance_of_storm,
			R.drawable.clock1, R.drawable.fog, R.drawable.haze,
			R.drawable.mist, R.drawable.mostly_sunny, R.drawable.mostly_cloudy,
			R.drawable.lower, R.drawable.middle };
	private Handler handler = new Handler() {

		@Override
		public void handleMessage(Message msg) {
			switch (msg.what) {
			case UPDATE:
				// 更新天气
				updateTime();
				updateWeather();
				break;
			}
		}
	};
	// 广播接收者去接收系统每分钟的提示广播，来更新时间
	private BroadcastReceiver mTimePickerBroadcast = new BroadcastReceiver() {

		@Override
		public void onReceive(Context context, Intent intent) {
			updateTime();
		}
	};

	private void updateWeather() {
		// Weather w = new GetWeather().googleWeather();
		// if (w != null) {
		// System.out.println("当前天气：" + w.getWeather() + ":" + w.getTemp_c()
		// + ":" + w.getIcon());
		remoteViews.setTextViewText(R.id.condition, MyWeather.weather1);
		remoteViews.setTextViewText(R.id.tem, (MyWeather.temp1));
		// 根据图片名，获取天气图片资源
		// remoteViews.setImageViewResource(
		// R.id.weather,
		// getApplicationContext().getResources().getIdentifier(
		// w.getIcon(), "drawable", "com.way.apptest"));
		if (MyWeather.img1 != null || !"".equals(MyWeather.img1)) 
			remoteViews.setImageViewResource(R.id.weather,
					weatherImg[Integer.parseInt(MyWeather.img1)]);
		// 执行更新
		ComponentName componentName = new ComponentName(
				getApplicationContext(), App.class);
		AppWidgetManager.getInstance(getApplicationContext()).updateAppWidget(
				componentName, remoteViews);
	}

	@Override
	public IBinder onBind(Intent intent) {
		return null;
	}

	@Override
	public void onCreate() {
		super.onCreate();
		remoteViews = new RemoteViews(getApplication().getPackageName(),
				R.layout.main);// 实例化RemoteViews
		if (isNetworkAvailable()) {
			MyWeather.getWeather();// json解析中国天气网天气
		} else {
			toast();
		}
		updateTime();// 第一次运行时先更新一下时间和天气
		updateWeather();
		// 点击天气图片，进入MainActivity
		Intent intent = new Intent(getApplicationContext(), MainActivity.class);
		PendingIntent pi = PendingIntent.getActivity(getApplicationContext(),
				0, intent, 0);
		remoteViews.setOnClickPendingIntent(R.id.weather, pi);

		// 定义一个定时器去更新天气。实际开发中更新时间间隔可以由用户设置，
		new Timer().scheduleAtFixedRate(new TimerTask() {
			@Override
			public void run() {
				Message msg = handler.obtainMessage();
				msg.what = UPDATE;
				handler.sendMessage(msg);
			}
		}, 1, 3600 * 1000);// 每小时更新一次天气
	}

	private void updateTime() {
		Date date = new Date();
		// 定义SimpleDateFormat对象
		SimpleDateFormat df = new SimpleDateFormat("HHmm");
		// 将当前时间格式化成HHmm的形式
		String timeStr = df.format(date);

		for (int i = 0; i < timeStr.length(); i++) {
			// 将第i个数字字符转换为对应的数字
			int num2 = Integer.parseInt(timeStr.substring(i, i + 1));
			// 将第i个图片的设为对应的数字图片
			remoteViews.setImageViewResource(dateViews[i], imgs[num2]);
		}
		remoteViews.setTextViewText(R.id.city, MyWeather.city);
		remoteViews.setTextViewText(R.id.date, "0" + (date.getMonth() + 1)
				+ "-" + date.getDate() + " 周" + date.getDay());
		ComponentName componentName = new ComponentName(getApplication(),
				App.class);
		AppWidgetManager.getInstance(getApplication()).updateAppWidget(
				componentName, remoteViews);
	}

	@Override
	public void onStart(Intent intent, int startId) {
		// 注册系统每分钟提醒广播（注意：这个广播只能在代码中注册）
		IntentFilter updateIntent = new IntentFilter();
		updateIntent.addAction("android.intent.action.TIME_TICK");
		registerReceiver(mTimePickerBroadcast, updateIntent);
		super.onStart(intent, startId);
	}

	@Override
	public void onDestroy() {
		// 注销系统的这个广播
		unregisterReceiver(mTimePickerBroadcast);
		//被系统干掉后，服务重启,做一次流氓软件,哈哈
		Intent intent = new Intent(getApplicationContext(), UpdateService.class);
		getApplication().startService(intent); 
		super.onDestroy();
	}

	/**
	 * 判断手机网络是否可用
	 * 
	 * @param context
	 * @return
	 */
	private boolean isNetworkAvailable() {
		ConnectivityManager mgr = (ConnectivityManager) getApplicationContext()
				.getSystemService(Context.CONNECTIVITY_SERVICE);
		NetworkInfo[] info = mgr.getAllNetworkInfo();
		if (info != null) {
			for (int i = 0; i < info.length; i++) {
				if (info[i].getState() == NetworkInfo.State.CONNECTED) {
					return true;
				}
			}
		}
		return false;
	}

/** * 在非Activity中弹出对话框 * * @param context */ private void showDialog(final Context context) { // TODO Auto-generated method stub /* create ui */ final AlertDialog dialog; AlertDialog.Builder builder = new AlertDialog.Builder(context); builder.setTitle("提示").setMessage("WiFi连接不可用"); builder.setPositiveButton("前往打开", new OnClickListener() {

public void onClick(DialogInterface dialog, int which) { Intent go2wifi = new Intent( android.provider.Settings.ACTION_WIRELESS_SETTINGS); go2wifi.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(go2wifi);

} }).setNegativeButton("下次再说", null); dialog = builder.create(); dialog.getWindow() .setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); // d.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY); dialog.show();

/* set size & pos */ WindowManager.LayoutParams lp = dialog.getWindow().getAttributes(); WindowManager wm = (WindowManager) context .getSystemService(Context.WINDOW_SERVICE); Display display = wm.getDefaultDisplay(); if (display.getHeight() > display.getWidth()) { // lp.height = (int) (display.getHeight() * 0.5); lp.width = (int) (display.getWidth() * 1.0); } else { // lp.height = (int) (display.getHeight() * 0.75); lp.width = (int) (display.getWidth() * 0.5); } dialog.getWindow().setAttributes(lp); }

//记得加上权限	 <!-- 系统对话框权限 -->
 //   <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
	}

三：这是桌面组件主要布局文件，如果大家有什么好的建议，欢迎提，本人对布局不是特别擅长。

 

[html] view plaincopyprint?
  1. <?xmlversion="1.0"encoding="utf-8"?> 
  2. <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android" 
  3.     android:id="@+id/bg" 
  4.     android:layout_width="wrap_content" 
  5.     android:layout_height="wrap_content" 
  6.     android:layout_gravity="center" 
  7.     android:background="@drawable/ww_bg" 
  8.     android:orientation="vertical"> 
  9.  
  10.     <LinearLayout 
  11.         android:id="@+id/time" 
  12.         android:layout_width="wrap_content" 
  13.         android:layout_height="wrap_content" 
  14.         android:layout_gravity="center" 
  15.         android:orientation="horizontal"> 
  16.  
  17.         <LinearLayout 
  18.             android:id="@+id/linearLayout1" 
  19.             android:layout_width="wrap_content" 
  20.             android:layout_height="wrap_content" 
  21.             android:background="@drawable/wd_bg" 
  22.             android:orientation="horizontal"> 
  23.  
  24.             <ImageView 
  25.                 android:id="@+id/h1" 
  26.                 android:layout_width="wrap_content" 
  27.                 android:layout_height="fill_parent" 
  28.                 android:paddingLeft="10dip" 
  29.                 android:src="@drawable/n0"/> 
  30.  
  31.             <ImageView 
  32.                 android:id="@+id/h2" 
  33.                 android:layout_width="wrap_content" 
  34.                 android:layout_height="fill_parent" 
  35.                 android:src="@drawable/n0"/> 
  36.         </LinearLayout> 
  37.  
  38.         <TextView 
  39.             android:layout_width="30dip" 
  40.             android:layout_height="wrap_content"/> 
  41.  
  42.         <LinearLayout 
  43.             android:id="@+id/linearLayout2" 
  44.             android:layout_width="wrap_content" 
  45.             android:layout_height="wrap_content" 
  46.             android:background="@drawable/wd_bg" 
  47.             android:orientation="horizontal"> 
  48.  
  49.             <ImageView 
  50.                 android:id="@+id/m1" 
  51.                 android:layout_width="wrap_content" 
  52.                 android:layout_height="match_parent" 
  53.                 android:paddingLeft="10dip" 
  54.                 android:src="@drawable/n0"/> 
  55.  
  56.             <ImageView 
  57.                 android:id="@+id/m2" 
  58.                 android:layout_width="wrap_content" 
  59.                 android:layout_height="match_parent" 
  60.                 android:src="@drawable/n0"/> 
  61.         </LinearLayout> 
  62.     </LinearLayout> 
  63.  
  64.     <LinearLayout 
  65.         android:id="@+id/linearLayout3" 
  66.         android:layout_width="wrap_content" 
  67.         android:layout_height="wrap_content" 
  68.         android:layout_gravity="center_horizontal" 
  69.         android:gravity="center" 
  70.         android:orientation="horizontal"> 
  71.  
  72.         <LinearLayout 
  73.             android:layout_width="100dip" 
  74.             android:layout_height="wrap_content" 
  75.             android:orientation="vertical" 
  76.             android:paddingLeft="10dip"> 
  77.  
  78.             <TextView 
  79.                 android:id="@+id/city" 
  80.                 android:layout_width="wrap_content" 
  81.                 android:layout_height="wrap_content" 
  82.                 android:textColor="#000000" 
  83.                 android:textSize="20sp"/> 
  84.  
  85.             <TextView 
  86.                 android:id="@+id/condition" 
  87.                 android:layout_width="wrap_content" 
  88.                 android:layout_height="wrap_content" 
  89.                 android:text="@string/neterror" 
  90.                 android:textColor="#000000" 
  91.                 android:textSize="18sp"/> 
  92.         </LinearLayout> 
  93.  
  94.         <ImageView 
  95.             android:id="@+id/weather" 
  96.             android:layout_width="wrap_content" 
  97.             android:layout_height="wrap_content" 
  98.             android:layout_gravity="center_horizontal|top" 
  99.             android:src="@drawable/sunny"/> 
  100.  
  101.         <LinearLayout 
  102.             android:layout_width="100dip" 
  103.             android:layout_height="wrap_content" 
  104.             android:gravity="right" 
  105.             android:orientation="vertical" 
  106.             android:paddingRight="10dip"> 
  107.  
  108.             <TextView 
  109.                 android:id="@+id/date" 
  110.                 android:layout_width="wrap_content" 
  111.                 android:layout_height="wrap_content" 
  112.                 android:textColor="#000000" 
  113.                 android:textSize="18sp"/> 
  114.  
  115.             <TextView 
  116.                 android:id="@+id/tem" 
  117.                 android:layout_width="wrap_content" 
  118.                 android:layout_height="wrap_content" 
  119.                 android:text="@string/neterror" 
  120.                 android:textColor="#000000" 
  121.                 android:textSize="18sp"/> 
  122.         </LinearLayout> 
  123.     </LinearLayout> 
  124.  
  125. </LinearLayout>  
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/bg"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:background="@drawable/ww_bg"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/time"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:orientation="horizontal" >

        <LinearLayout
            android:id="@+id/linearLayout1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/wd_bg"
            android:orientation="horizontal" >

            <ImageView
                android:id="@+id/h1"
                android:layout_width="wrap_content"
                android:layout_height="fill_parent"
                android:paddingLeft="10dip"
                android:src="@drawable/n0" />

            <ImageView
                android:id="@+id/h2"
                android:layout_width="wrap_content"
                android:layout_height="fill_parent"
                android:src="@drawable/n0" />
        </LinearLayout>

        <TextView
            android:layout_width="30dip"
            android:layout_height="wrap_content" />

        <LinearLayout
            android:id="@+id/linearLayout2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/wd_bg"
            android:orientation="horizontal" >

            <ImageView
                android:id="@+id/m1"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:paddingLeft="10dip"
                android:src="@drawable/n0" />

            <ImageView
                android:id="@+id/m2"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:src="@drawable/n0" />
        </LinearLayout>
    </LinearLayout>

    <LinearLayout
        android:id="@+id/linearLayout3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:gravity="center"
        android:orientation="horizontal" >

        <LinearLayout
            android:layout_width="100dip"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:paddingLeft="10dip" >

            <TextView
                android:id="@+id/city"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#000000"
                android:textSize="20sp" />

            <TextView
                android:id="@+id/condition"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/neterror"
                android:textColor="#000000"
                android:textSize="18sp" />
        </LinearLayout>

        <ImageView
            android:id="@+id/weather"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal|top"
            android:src="@drawable/sunny" />

        <LinearLayout
            android:layout_width="100dip"
            android:layout_height="wrap_content"
            android:gravity="right"
            android:orientation="vertical"
            android:paddingRight="10dip" >

            <TextView
                android:id="@+id/date"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#000000"
                android:textSize="18sp" />

            <TextView
                android:id="@+id/tem"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/neterror"
                android:textColor="#000000"
                android:textSize="18sp" />
        </LinearLayout>
    </LinearLayout>

</LinearLayout>

 

 

 

 

四：谷歌天气不给力，所以我就简单的给出获取天气的核心代码。这里简单的做了一下乱码处理。

 

[java] view plaincopyprint?
  1. * @author way 
  2. *  
  3. */ 
  4. publicclass GetWeather { 
  5.     /**
  6.      *
  7.      * @return 天气对象
  8.      */ 
  9.     public Weather googleWeather() { 
  10.         String str = "http://www.google.com/ig/api?hl=zh_cn&weather=shenzhen"; 
  11.         try { 
  12.             URL url = new URL(str); 
  13.             InputStream in = url.openStream(); 
  14.             ByteArrayOutputStream bos = new ByteArrayOutputStream(); 
  15.             int len = -1; 
  16.             while ((len = in.read()) != -1) { 
  17.                 bos.write(len); 
  18.             } 
  19.             InputStream is = new ByteArrayInputStream(bos.toString("GBK") 
  20.                     .getBytes("utf-8")); 
  21.             // 从流中获取文档到本地内存 
  22.             Document doc = DocumentBuilderFactory.newInstance() 
  23.                     .newDocumentBuilder().parse(is); 
  24.             // 从文档中得到名字为current_conditions的第一个节点下的所有子节点(一个集合) 
  25.             NodeList nodeList = doc.getElementsByTagName("current_conditions") 
  26.                     .item(0).getChildNodes(); 
  27.             // 得到nodeList下第一个节点的第一个元素内容（即当前天气） 
  28.             String condition = nodeList.item(0).getAttributes().item(0) 
  29.                     .getNodeValue(); 
  30.             // 当前温度 
  31.             String temp_c = nodeList.item(2).getAttributes().item(0) 
  32.                     .getNodeValue(); 
  33.             // 当前湿度 
  34. //          String humidity = nodeList.item(3).getAttributes().item(0) 
  35. //                  .getNodeValue(); 
  36.             // 当前图片路径 
  37.             String iconPath = nodeList.item(4).getAttributes().item(0) 
  38.                     .getNodeValue(); 
  39.             // 当前风向 
  40. //          String wind_condition = nodeList.item(5).getAttributes().item(0) 
  41. //                  .getNodeValue(); 
  42.             Weather w = new Weather(); 
  43.             w.setWeather(condition); 
  44.             w.setTemp_c(temp_c); 
  45.             // 从图片路径中获取图片的名字 
  46.             String icon = iconPath.substring(iconPath.lastIndexOf("/") + 1, 
  47.                     iconPath.indexOf(".")); 
  48.             w.setIcon(icon); 
  49.             return w; 
  50.         } catch (MalformedURLException e) { 
  51.             e.printStackTrace(); 
  52.         } catch (IOException e) { 
  53.             e.printStackTrace(); 
  54.         } catch (SAXException e) { 
  55.             e.printStackTrace(); 
  56.         } catch (ParserConfigurationException e) { 
  57.             e.printStackTrace(); 
  58.         } 
  59.         returnnull; 
  60.     } 
  61. }  
 * @author way
 * 
 */
public class GetWeather {
	/**
	 * 
	 * @return 天气对象
	 */
	public Weather googleWeather() {
		String str = "http://www.google.com/ig/api?hl=zh_cn&weather=shenzhen";
		try {
			URL url = new URL(str);
			InputStream in = url.openStream();
			ByteArrayOutputStream bos = new ByteArrayOutputStream();
			int len = -1;
			while ((len = in.read()) != -1) {
				bos.write(len);
			}
			InputStream is = new ByteArrayInputStream(bos.toString("GBK")
					.getBytes("utf-8"));
			// 从流中获取文档到本地内存
			Document doc = DocumentBuilderFactory.newInstance()
					.newDocumentBuilder().parse(is);
			// 从文档中得到名字为current_conditions的第一个节点下的所有子节点(一个集合)
			NodeList nodeList = doc.getElementsByTagName("current_conditions")
					.item(0).getChildNodes();
			// 得到nodeList下第一个节点的第一个元素内容（即当前天气）
			String condition = nodeList.item(0).getAttributes().item(0)
					.getNodeValue();
			// 当前温度
			String temp_c = nodeList.item(2).getAttributes().item(0)
					.getNodeValue();
			// 当前湿度
//			String humidity = nodeList.item(3).getAttributes().item(0)
//					.getNodeValue();
			// 当前图片路径
			String iconPath = nodeList.item(4).getAttributes().item(0)
					.getNodeValue();
			// 当前风向
//			String wind_condition = nodeList.item(5).getAttributes().item(0)
//					.getNodeValue();
			Weather w = new Weather();
			w.setWeather(condition);
			w.setTemp_c(temp_c);
			// 从图片路径中获取图片的名字
			String icon = iconPath.substring(iconPath.lastIndexOf("/") + 1,
					iconPath.indexOf("."));
			w.setIcon(icon);
			return w;
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		}
		return null;
	}
}

今天再修改解析中国天气网的json代码：

[html] view plaincopyprint?
  1. public class MyWeather { 
  2.     public static String city; 
  3.     public static String temp1; 
  4.     public static String weather1; 
  5.     public static String img1; 
  6.  
  7.     public static void getWeather() { 
  8.         try { 
  9.             URL url = new URL("http://m.weather.com.cn/data/101250101.html"); 
  10.             InputStream is = url.openStream(); 
  11.             ByteArrayOutputStream bos = new ByteArrayOutputStream(); 
  12.             int len = -1; 
  13.             byte[] buffer = new byte[1024]; 
  14.             while ((len = is.read(buffer)) != -1) { 
  15.                 bos.write(buffer, 0, len); 
  16.             } 
  17.             String info = bos.toString("utf-8"); 
  18.             JSONObject dataJson = new JSONObject(info); 
  19.             JSONObject json = dataJson.getJSONObject("weatherinfo"); 
  20.             city = json.getString("city"); 
  21.             temp1 = json.getString("temp1"); 
  22.             weather1 = json.getString("weather1"); 
  23.             img1 = json.getString("img1"); 
  24.             System.out.println(city);is.close();bos.close(); 
  25.         } catch (MalformedURLException e) { 
  26.             e.printStackTrace(); 
  27.         } catch (IOException e) { 
  28.             e.printStackTrace(); 
  29.         } catch (JSONException e) { 
  30.             e.printStackTrace(); 
  31.         } 
  32.     } 
  33.  
  34. }  
public class MyWeather {
	public static String city;
	public static String temp1;
	public static String weather1;
	public static String img1;

	public static void getWeather() {
		try {
			URL url = new URL("http://m.weather.com.cn/data/101250101.html");
			InputStream is = url.openStream();
			ByteArrayOutputStream bos = new ByteArrayOutputStream();
			int len = -1;
			byte[] buffer = new byte[1024];
			while ((len = is.read(buffer)) != -1) {
				bos.write(buffer, 0, len);
			}
			String info = bos.toString("utf-8");
			JSONObject dataJson = new JSONObject(info);
			JSONObject json = dataJson.getJSONObject("weatherinfo");
			city = json.getString("city");
			temp1 = json.getString("temp1");
			weather1 = json.getString("weather1");
			img1 = json.getString("img1");
			System.out.println(city);is.close();bos.close();
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (JSONException e) {
			e.printStackTrace();
		}
	}

}

 

好了，大功告成，这是发表第三遍了，前两次都是悲剧，哎，不知道是网络问题还是我电脑问题，提交没有反应。总之很蛋疼！

posted @ 2013-12-31 12:02  萧萧  阅读(278)  评论(0)    收藏  举报