App Widget Provider 应用

/*

 * 实现AppWidgetProvider  *

  * onUpdate 在到达指定的更新时间之后或当用户添加app widget时调用该方法 *

 * onEnabled 当App Widget 第一个实例被创建时  *

  * onDeleted  当App Widget 实例被删除时  *

 * onDisabled  当App Widget 最后一个实例被删除时  *

 * onReceive  接受广播  *  * */

 注册信息

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

    <uses-sdk android:minSdkVersion="7" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".Activity01" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver
      android:name=".appwidgetprovider">
      <intent-filter>
        <action
          android:name="android.appwidget.action.APPWIDGET_UPDATE">
        </action>
      </intent-filter>
      <meta-data 
        android:resource="@xml/appwidget_info" 
        android:name="android.appwidget.provider">
      </meta-data>
    </receiver>>
    </application>

</manifest>

appwidget_info.xml   在res/xml中    定义AppWidgetProviderInfo 

<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
  android:minWidth="72dip"
  android:minHeight="72dip"
  android:updatePeriodMillis="86400000"
  android:initialLayout="@layout/example_appwidget"   

/>

桌面上Widget布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
    
    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="测试按钮"        

        android:id="@+id/buton01"/>
</LinearLayout>
 <!--   桌面上显示布局     -->

 appwidgetprovider.xml

package my.com.appwidget;

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;

/*
 * 实现AppWidgetProvider
 * 
 * onUpdate 在到达指定的更新时间之后或当用户添加app widget时调用该方法
 * 
 * onEnabled 当App Widget 第一个实例被创建时
 * 
 * onDeleted  当App Widget 实例被删除时
 * 
 * onDisabled  当App Widget 最后一个实例被删除时
 * 
 * onReceive  接受广播
 * 
 * */
public class appwidgetprovider extends AppWidgetProvider {
   
    @Override
    public void onDeleted(Context context, int[] appWidgetIds) {
        // TODO Auto-generated method stub
        System.out.println("-------onDeleted");
        super.onDeleted(context, appWidgetIds);
    }

    @Override
    public void onDisabled(Context context) {
        // TODO Auto-generated method stub
        System.out.println("-------onDisabled");
        super.onDisabled(context);
    }

    @Override
    public void onEnabled(Context context) {
        // TODO Auto-generated method stub
        System.out.println("-------onEnabled");
        super.onEnabled(context);
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        System.out.println("-------onReceive");
        super.onReceive(context, intent);
    }

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager,
            int[] appWidgetIds) {
        // TODO Auto-generated method stub
        System.out.println("-------onUpdate");
        
        super.onUpdate(context, appWidgetManager, appWidgetIds);
        
        final int N = appWidgetIds.length;
        for (int i = 0; i < N; i++)
        {
          int appWidgetId = appWidgetIds[i];
          //创建一个Intent
          Intent configIntent = new Intent(context, Activity01.class);
          //创建一个PendingIntent对象
          PendingIntent configPendingIntent = PendingIntent.getActivity(context, 0,
              configIntent, 0);
          // 获取远程桌面的布局文件
          RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
              R.layout.example_appwidget);
          //为按钮绑定事件处理器
          //第一个参数用来指定被绑定处理器的空间的ID
          remoteViews.setOnClickPendingIntent(R.id.buton01, configPendingIntent);

          appWidgetManager.updateAppWidget(appWidgetId, remoteViews);
        }
    }

}

Activity01.java

package my.com.appwidget;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;

public class Activity01 extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.example_appwidget);
        Button m_button=(Button)findViewById(R.id.buton01);
    }
}