Android开发入门之Appwidget用法分析

<receiver android:name="ExampleAppWidgetProvider" >
      <intent-filter>
       <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
      </intent-filter>
      <meta-data android:name="android.appwidget.provider"
        android:resource="@xml/example_appwidget_info" />
</receiver>

<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
  android:minWidth="294dp"
  android:minHeight="72dp"
  android:updatePeriodMillis="86400000"
  android:previewImage="@drawable/preview"
  android:initialLayout="@layout/example_appwidget"
  android:configure="com.example.android.ExampleAppWidgetConfigure"
  android:resizeMode="horizontal|vertical">
</appwidget-provider>

package com.manymorere.appwidget;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;
public class ExampleAppWidgetProvider extends AppWidgetProvider{
  private static final String ACTION = "com.manymore.appwidget";
  private int id;
  @Override
  public void onDeleted(Context context, int[] appWidgetIds) {
    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) {
    System.out.println("onReceive");
    // 自己定义的ACTION
    if(intent.getAction().equals(ACTION))
    {
      RemoteViews remoteView = new RemoteViews(context.getPackageName(),R.layout.appwidget_layout);
      remoteView.setCharSequence(R.id.button, "setText", "22222222222222");
      AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
      ComponentName componentName = new ComponentName(context, ExampleAppWidgetProvider.class);
      appWidgetManager.updateAppWidget(componentName , remoteView);
      System.out.println("收到自定义ACTION");
    }else{
      super.onReceive(context, intent);
    }
  }
  @Override
  public void onUpdate(Context context, AppWidgetManager appWidgetManager,
      int[] appWidgetIds) {
    int N = appWidgetIds.length;
    for(int i = 0; i<N; i++)
    {
      int appWidgetId = appWidgetIds[i];
      Intent intent = new Intent(ACTION);
      PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
      RemoteViews remoteViews = new RemoteViews(context.getPackageName(),R.layout.appwidget_layout);
      remoteViews.setOnClickPendingIntent(R.id.button, pendingIntent);
      appWidgetManager.updateAppWidget(appWidgetId, remoteViews);
      System.out.println(appWidgetId);
    }
    super.onUpdate(context, appWidgetManager, appWidgetIds);
  }
}