flex as中如何使用webservice

/**
   *方法一
   */
  public function init():void
  {
   webservice = new WebService();
   webservice.useProxy=false;
   webservice.addEventListener(FaultEvent.FAULT,onFault);
   webservice.addEventListener(ResultEvent.RESULT,onResult);
   webservice.addEventListener(LoadEvent.LOAD,onLoad);
   webservice.wsdl = "http://192.168.80.83/webservice/PrivilegeService?WSDL";
   webservice.loadWSDL(webservice.wsdl);
   
   
   
  }
  
  private function onResult(event:ResultEvent):void
  {
   Alert.show("111");
   //this.txa1.text += event.message.body.toString()+"\n";
  }
  
  private function onFault(event:FaultEvent):void
  {
   Alert.show("333");
   //this.txa1.text += event.fault + "\n";
  }
  
  private function onLoad(event:LoadEvent):void
  {
   Alert.show("222");
   /* 调用方法需要传入二个参数，如果只传入一个，或者不传入，都会请求失败*/
   webservice.logon4Inner("aa","kkk");
  }

 

 

 /**
   *方法二
   */
  public function test():void{
   var ws:WebService= new WebService();
   ws.wsdl = "http://192.168.80.83/webservice/PrivilegeService?WSDL";
   ws.loadWSDL();
   var operation:AbstractOperation = ws.getOperation("logon4Inner");
   //为调用的方法添加监听器，回调函数由外部动态传入
   operation.addEventListener(ResultEvent.RESULT,this.callBackHandler);//增加处理函数
   
   operation.addEventListener(FaultEvent.FAULT,this.faultHandler);//增加处理函数
   var arr:Array = new Array();
   arr.push("china");
   //为调用的方法传参数，参数类型为Array
   operation.arguments = {userName:"aaa",pwd:"kkk"};
   //执行调用的方法
   operation.send();  
  }
  
  public function callBackHandler(event:ResultEvent):void{
   Alert.show("ggg");
  }
  
  public function faultHandler(event:FaultEvent):void{
   Alert.show("333");
  }