js、as相互调用

js调用as

在flex中进行注册

<fx:Script>
<![CDATA[
import mx.controls.Alert;
import mx.events.FlexEvent;
public var sound:Sound;
protected function play(url:String,stop:String,go:String):void      //  调用函数
{
//"http://192.168.10.104:8080/group1/M00/00/00/wKgKaVFx-8m6PEtTAEjMrhpBa1U552.mp3"
var req:URLRequest = new URLRequest(url);
var context:SoundLoaderContext = new SoundLoaderContext(1000, true);
sound = new Sound(req,context);
sound.addEventListener(Event.COMPLETE,playSound);


}


public function playSound(e:Event):void{
sound.play();
}

protected function initApp(event:FlexEvent):void
{
ExternalInterface.addCallback("play",play);  // 注册
}

]]>
</fx:Script>

js中调用该注册函数

function playVoice(url,stop,go){
var flash = frame.window.document.getElementById("voicePlay");
flash.play(url,stop,go);
}

as调用js

as处

protected function initApp(event:FlexEvent):void
{
var url:String =  ExternalInterface.call("getUrl");  //调用
ecgService.url = url;
ecgService.send();
ecg = new Ecg(new Array(),0,0);
}

js处

 <script type="text/javascript">
       function getUrl(){
      <%  StringBuffer url = request.getRequestURL();  
      String tempContextUrl = url.delete(url.length() - request.getRequestURI().length(), url.length()).append(request.getContextPath()).append("/").toString();  
      %>                                                                                     //JSP代码
      var url = "<%=tempContextUrl+"lastEcg.action"%>";
      return url;
       } 
</script>  

若用iframe内嵌则

var flash = frame.window.document.getElementById("appName");  frame为内嵌frame的名字

var parent = window.parent

js与as的安全交互必须满足：

1. <param name='allowScriptAccess' value ='always' />   
2. flash不能隐藏(display:none)  
3. 等被调用方初始化完成再去调用，as中可以用ExtercalInterface.call('flashready')来告知初始化完成
4. 跨域执行，必须在flash中设置Secure.allowDomain或者Secure.allowInsecureDomain

http://12d.iteye.com/blog/1567416