flex 里键盘事件

一、

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
      addedToStage="stage.addEventListener(KeyboardEvent.KEY_DOWN, myKeyDown)"   
     click="clickEvt(event)"
     layout="absolute"
     frameRate="6"
     creationComplete="start()" keyFocusChange="testKey(event)"    
  backgroundGradientAlphas="[1.0, 1.0]" backgroundGradientColors="[#990000, #FF9900]">
 <mx:Script source="SnakeMain.as"/> 

二、<?xml version="1.0" encoding="utf-8"?>  
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 
                layout="absolute" 
                applicationComplete="appComplete();">  
    <mx:Script>  
       <![CDATA[  
           import mx.controls.Alert;  
            import flash.events.KeyboardEvent;  
              
            //监听keyboard事件  
            private function appComplete():void  
            {  
                 this.addEventListener(KeyboardEvent.KEY_DOWN,keyHandler);
                //this.addEventListener(KeyboardEvent.KEY_UP, myKeyUp);  
                //this.addEventListener(KeyboardEvent.KEY_DOWN, myKeyDown);  
            }  
               private function keyHandler(event:KeyboardEvent):void
               {
               trace(event.charCode);
               }
            //响应keyup事件  
            private function myKeyUp(evt:KeyboardEvent):void  
            {  
                mx.controls.Alert.show('evt.keyCode=' + evt.keyCode.toString()+"\n"+ "弹起\n", "KeyUp");  
            }  
              
            //响应keydown事件  
            private function myKeyDown(evt:KeyboardEvent):void  
            {  
                t1.text=t1.text + 'evt.charCode=' + evt.charCode + ' evt.keyCode=' + evt.keyCode + ' evt.keyLocation=' + evt.keyLocation + " 按下\n";  
            }  
        ]]>  
    </mx:Script>  
    <mx:TextArea x="261" 
                 y="226" 
                 id="t1" 
                 width="381" 
                 height="200"/>  
    <mx:TextInput x="372" 
                  y="114" 
                  id="t2"/>  
</mx:Application> 
当你把所有方法写在一个as文件里时用第一种方法获取键盘事件

当在mxml页面里获取键盘事件时用第二种方法!!!!!

 不管怎么去处理,都要找准给谁添加键盘监听事件 ok 这样就哦了!!