air了解和检测用户的存在

air使用了NativeApplication类来监测用户何时或不活动。与之相关的有两个事件：userIdle和userPresent；属性idleThreold是监测的时间段，默认值为300秒（五分钟）。下面的例子建立了监听者的正确使用方法：<?xml version="1.0" encoding="utf-8"?><mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml"layout="absolute"creationComplete="init()"><mx:Script><!--[CDATA[import air.net.URLMonitor;private var urlMonitor:URLMonitor;private var urlRequest:URLRequest;private function init():void{ nativeApplication.idleThreshold=10; nativeApplication.addEventListener(Event.USER_IDLE, idleHandler); nativeApplication.addEventListener(Event.USER_PRESENT, presentHandler); urlRequest=new URLRequest("http://www.adobe.com");urlMonitor=new URLMonitor(urlRequest);urlMonitor.addEventListener(StatusEvent.STATUS, statusHandler);urlMonitor.start();}private function statusHandler(e:StatusEvent):void{trace("current status:"+e.code);trace(urlMonitor.running);trace(urlMonitor.pollInterval);//默认为0trace(urlMonitor.lastStatusUpdate);}private function idleHandler(e:Event):void{trace("黄记新没有进行操作");}private function presentHandler(e:Event):void{trace("黄记新在电脑前");}]]--></mx:Script></mx:WindowedApplication>