键盘的监听

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方法一

<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="initApp()">

<mx:Script>

<![CDATA[

import flash.events.KeyboardEvent;

internal function initApp():void{

this.addEventListener(KeyboardEvent.KEY_DOWN,keyHandler);//注册键盘监听器

}

//响应键盘事件

internal function keyHandler(event:KeyboardEvent):void{

var str:String="你按下的是："+event.keyCode;

txtArea_text.text=str+" ";

}

]]>

</mx:Script>

<mx:Text x="22" y="10" text="按键盘上的数字"/>

<mx:TextArea x="22" y="36" height="143" width="240" id="txtArea_text"/>

</mx:Application>

方法二

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" keyDown="KeyHandler(event)">
<mx:Script>
  <![CDATA[
   //响应键盘事件
   internal function KeyHandler(event:KeyboardEvent):void{
    var str:String="你按下的是："+event.keyCode;
    txtArea_text.text=str+"/n";
   }
  ]]>
</mx:Script>
<mx:Text x="22" y="10" text="按键盘上的数字"/>
<mx:TextArea x="22" y="36" height="143" width="240" id="txtArea_text"/>

</mx:Application>