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.csdn.net/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！

转载自：http://blog.csdn.net/xingjunli/article/details/5165881