总结Flex与浏览器交互

   在用flex做Web应用时为了扩展应用程序功能，势必会更多的同浏览器进行交互，这样就会用到下面介绍的知识
1、在Flex中实现URL 跳转(使用flash.net.navigateToURL()方法如：)
   /* * param1: 要跳转的URL * param2: 跳转方式 _blank /_self */ navigateToURL(new URLRequest("http://blog.youkuaiyun.com/xingjunli"),"_blank");
2、使用FlashVars传替换参数（使用Application.application.parameters属性）
    页面嵌入SWF文件代码（我们可以通过JS动态来设置FlashVars信息已达到数据交互的目的）
              <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="100%" height="100%" id="mySwf"> <param name="movie" value="main.swf" /> <param name="quality" value="high" /> <param name="bgcolor" value="#869ca7" /> <param name="allowScriptAccess" value="sameDomain" /> <param name="FlashVars" value="UserName=Andy_liu&Age=18&Address=HongKong" /> </object>
        Flex中获取参数代码:
           private function onFlashVars(e:MouseEvent):void //获取页面参数 { var parameters:Object = Application.application.parameters; labURL.text = Application.application.url.toString(); // http://localhost:8889/main.swf var param1:String = parameters.UserName; // Andy_liu var param2:int = parseInt(parameters.Age); // 18 var param3:String = parameters.Address; // HongKong /* txtParam1.text = param1; txtParam2.text = String(param2); txtParam3.text = param3; */ }
3、在Flex中调用JavaScript函数
    先在页面中完成js function(注在Flex中只能调用当前页面引入的JS函数)
   function ShowUserInfo(name,age,address) { alert("Name:" + name+"/n" + "Age:" + age + "/n" +"Address"+address); return "Call Successful!" }
     Flex中调用方法并获取JS function返回值（ 使用ExternalInterface.call()方法）：
    private function onCallJS(e:MouseEvent):void { /* * param1:当前页JS function 方法名 * param...传递的参数0-N个 */ var resultValue:String = ExternalInterface.call("ShowUserInfo",txtParam1.text,txtParam2.text,txtParam3.text); //resultValue = Call Successful! }
4、在JavaScript中调用ActionScript函数
    页面中调用的JS 函数
   function CallFlexMethod() { var swf="mySwf"; var container; //alert(navigator.appName); if(navigator.appName.indexOf("Microsoft")>=0) { container = document; } else { container = window; } container[swf].flexFunction1(); //无参方法 container[swf].flexFunction2("myHtmlRequest!");//参数传递方法 alert(container[swf].flexFunction3()); //含返回值方法 }

     Flex中注册和调用执行的方法：
     //重要必须在Flex中执行如下注册 才能在JS中调用 private function registerCallBacks():void { ExternalInterface.addCallback("flexFunction1",jsCallBack1); ExternalInterface.addCallback("flexFunction2",jsCallBack2); ExternalInterface.addCallback("flexFunction3",jsCallBack3); } private function jsCallBack1():void { Alert.show("Call First Flex Method!"); } private function jsCallBack2(params:*):void { Alert.show("Call Method2:" + String(params)); } private function jsCallBack3():String { return Math.random().toString(); }
5、BrowserManager管理组件应用
     BrowserManager 是一个 Singleton 管理器，用于充当浏览器和应用程序之间的代理。使用它可以访问浏览器地址栏中的 URL，这与访问 JavaScript 中的 document.location 属性类似。当 url 属性发生更改时调度这些事件。然后侦听器可以响应、更改该 URL 或阻止其它对象获取此事件。
      获得bm实例：
     private var bm:IBrowserManager = BrowserManager.getInstance();
      a、获取URL传递的参数：
   private function getBrowserValue():void { //URL = "http://localhost/browser/main.html#name=peter;age=25;address=shenzhen china" var o:Object = URLUtil.stringToObject(bm.fragment); txtURLName.text = o.name; // peter txtURLAge.text = o.age; // 25 txtURLAddress.text = o.address; // shenzhen china }
    b、获取浏览器信息(请求URL：“http://localhost:8889/main.html#name=peter;age=25;address=shenzhen%20china”)
       private function onBrowserManager(e:MouseEvent):void { txtBMOutPut.text += "Full URL: /n" + bm.url + "/n/n"; txtBMOutPut.text += "Base URL: /n" + bm.base + "/n/n"; txtBMOutPut.text += "URL Fragment URL: /n" + bm.fragment + "/n-----------/n"; var o:Object = URLUtil.stringToObject(bm.fragment); txtBMOutPut.text += "Object: /n" + ObjectUtil.toString(o) + "/n/n"; txtBMOutPut.text += "Name: /n" + o.name + "/n/n"; txtBMOutPut.text += "Age: /n" + o.age + "/n/n"; txtBMOutPut.text += "Address: /n" + o.address + "/n-----------/n"; txtBMOutPut.text += "URL Port: /n" + URLUtil.getPort(bm.url) + "/n/n"; txtBMOutPut.text += "URL Protocol: /n" + URLUtil.getProtocol(bm.url) + "/n/n"; txtBMOutPut.text += "URL Server: /n" + URLUtil.getServerName(bm.url) + "/n/n"; txtBMOutPut.text += "URL Server with Port: /n" + URLUtil.getServerNameWithPort(bm.url) + "/n-----------/n"; /* 执行结果: Full URL: http://localhost:8889/main.html#name=peter;age=25;address=shenzhen%20china Base URL: http://localhost:8889/main.html URL Fragment URL: name=peter;age=25;address=shenzhen%20china ----------- Object: (Object)#0 address = "shenzhen china" age = 25 name = "peter" Name: peter Age: 25 Address: shenzhen china ----------- URL Port: 8889 URL Protocol: http URL Server: localhost URL Server with Port: localhost:8889 ----------- */ }
        c、BrowserManager还包含其它一些浏览器的扩展方法如：bm.setTitle("新标题：正在培训!")修改页面标题等...参考http://livedocs.adobe.com/flex/3/html/help.html?content=deep_linking_3.html
6、在Flex中通过实现mx.managers.IHistoryManagerClinet接口来实现自定义历史记录管理器
 自定义textInput
 <?xml version="1.0" encoding="utf-8"?> <mx:TextInput xmlns:mx="http://www.adobe.com/2006/mxml" text="Change Me!" implements="mx.managers.IHistoryManagerClient" creationComplete="mx.managers.HistoryManager.register(this);" change="textChanged(event)"> <mx:Script> <!--[CDATA[ import mx.managers.HistoryManager; private function textChanged(e:Event):void { HistoryManager.save(); } public function saveState():Object { return {text:text}; } public function loadState(state:Object):void { var newState:String = state?state.text:""; if(newState != text) { text = unescape(newState); } } ]]--> </mx:Script> </mx:TextInput>
 当我们在使用上面自定义的TextInput时会发现在浏览器URL中会动态创建修入如这样的一些信息“#app=a4e4&8211-text=asdfasdfasdfsd%20”故FLEX通过浏览器URL记录SWF文件中组件的变化已实现保存历史记录数据已实现历史记录管理！