Android:AppWidget、桌面小部件

主要事件方法:

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/**
  * Implementation of App Widget functionality.
  */
public  class  NewAppWidget  extends  AppWidgetProvider
{
     /**
      * 到达指定的更新时间或者当用户向桌面添加AppWidget时被调用
      * */
     @Override
     public  void  onUpdate(Context context, AppWidgetManager appWidgetManager,
             int [] appWidgetIds)
     {
         // There may be multiple widgets active, so update all of them
         final  int  N = appWidgetIds.length;
         for  ( int  i =  0 ; i < N; i++)
         {
             updateAppWidget(context, appWidgetManager, appWidgetIds[i]);
         }
     }
     /**
      * AppWidget的实例第一次被创建时调用
      * */
     @Override
     public  void  onEnabled(Context context)
     {
         // Enter relevant functionality for when the first widget is created
     }
     /**
      * 最后一个appWidget被删除时调用
      * */
     @Override
     public  void  onDisabled(Context context)
     {
         // Enter relevant functionality for when the last widget is disabled
     }
     /**
      * 接受广播事件
      * */
     @Override
     public  void  onReceive(Context context, Intent intent)
     {
         // TODO Auto-generated method stub
         super .onReceive(context, intent);
     }
            
     /**
      * 删除一个AppWidget时调用
      * */
     @Override
     public  void  onDeleted(Context context,  int [] appWidgetIds)
     {
         // TODO Auto-generated method stub
         super .onDeleted(context, appWidgetIds);
     }
     static  void  updateAppWidget(Context context,
             AppWidgetManager appWidgetManager,  int  appWidgetId)
     {
         CharSequence widgetText = context.getString(R.string.appwidget_text);
         // Construct the RemoteViews object
         RemoteViews views =  new  RemoteViews(context.getPackageName(),
                 R.layout.new_app_widget);
         views.setTextViewText(R.id.appwidget_text, widgetText);
         // Instruct the widget manager to update the widget
         appWidgetManager.updateAppWidget(appWidgetId, views);
     }
}




本文转自 glblong 51CTO博客,原文链接:http://blog.51cto.com/glblong/1228549,如需转载请自行联系原作者

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