widget intent重复问题

 Intent intent = new Intent(WidgetProvider.ACTION_SWITCH);
 intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,appWidgetid);
 int requestcode = appWidgetid;//这里requestcode用于区分各intent 而不是intent对象
 PendingIntent pendingIntent = PendingIntent.getBroadcast(context, requestcode, intent, PendingIntent.FLAG_UPDATE_CURRENT);