AIR应用更新

<update xmlns="http://ns.adobe.com/air/framework/update/description/2.5">
<versionNumber>0.0.1</versionNumber>
<url>http://localhost:8080/update/xxx.air</url>
<description/>
</update>

　　　　 //读取配置文件
        public function ReadConfig():void
        {
            //获取该版本号
            appUpdater=new ApplicationUpdater(); 
            Global.getInstance().currentVersion = appUpdater.currentVersion;    
var urlLoad:URLLoader=new URLLoader();
            urlLoad.load(new URLRequest("http://localhost:8080/update/update.xml"));
            urlLoad.addEventListener(HTTPStatusEvent.HTTP_STATUS,CheckFunction);
       
        }
        
        protected function CheckFunction(event:HTTPStatusEvent):void
        {
            if(event.status == 200)
            {
                checkVersion();
            }
            else
            {
                this.dispatchEvent(new Event(Event.COMPLETE));
　　　　　　　　　　//如果网络不通，就跳过更新
            }
            
        }
        
        //检查版本自动更新
        protected function checkVersion():void
        {
            beetleApp.startPage.Tips="正在检测版本更新……";    
            NativeApplication.nativeApplication.addEventListener( Event.EXITING, 
                function(e:Event):void {
                    var opened:Array = NativeApplication.nativeApplication.openedWindows;
                    for (var i:int = 0; i < opened.length; i ++) {
                        opened[i].close();
                    }
                }); 
            //区别就是是否有提示
            //appUpdater = new ApplicationUpdater();
            appUpdater.isNewerVersionFunction=isNewerVersionFunction;
            //appUpdater.configurationFile = configurationFile;
            //appUpdater.isCheckForUpdateVisible = false;
            appUpdater.updateURL = Constants.UPDATE_URL;
            appUpdater.addEventListener(UpdateEvent.INITIALIZED, updaterInitialized);
            appUpdater.addEventListener(StatusUpdateEvent.UPDATE_STATUS, statusUpdate);
            appUpdater.addEventListener(UpdateEvent.BEFORE_INSTALL, beforeInstall);
            appUpdater.addEventListener(StatusUpdateErrorEvent.UPDATE_ERROR, statusUpdateError);
            appUpdater.addEventListener(UpdateEvent.DOWNLOAD_START, downloadStarted);
            appUpdater.addEventListener(ProgressEvent.PROGRESS, downloadProgress);
            appUpdater.addEventListener(UpdateEvent.DOWNLOAD_COMPLETE, downloadComplete);
            appUpdater.addEventListener(DownloadErrorEvent.DOWNLOAD_ERROR, downloadError);
            appUpdater.addEventListener(ErrorEvent.ERROR, updaterError);
            appUpdater.initialize();
            
        }
        
        private var appVersion:String;
        private var baseURL:String;
        private var upateVersion:String;
        private var description:String;
        private var isFirstRun:String;
        private var applicationName:String;
        private var installedVersion:String;
        
        private function updaterInitialized(event:UpdateEvent):void
        {
            this.isFirstRun = event.target.isFirstRun;
            this.applicationName = getApplicationName();
            this.installedVersion = getApplicationVersion();
            appUpdater.checkNow();
        }
        
        private function getApplicationVersion():String
        {
            var appXML:XML = NativeApplication.nativeApplication.applicationDescriptor;
            var ns:Namespace = appXML.namespace();
            return appXML.ns::version;
        }
        
        /**
         * Getter method to get the name of the application, this does not support multi-language.
         * Based on a method from Adobes ApplicationUpdaterDialogs.mxml, which is part of Adobes AIR Updater Framework
         * Also based on Jens Krause blog post: http://www.websector.de/blog/2009/09/09/custom-applicationupdaterui-for-using-air-updater-framework-in-flex-4/
         *
         * @return String name of application
         *
         */
        private function getApplicationName():String
        {
            var applicationName:String;
            var xmlNS:Namespace=new Namespace("http://www.w3.org/XML/1998/namespace");
            var appXML:XML=NativeApplication.nativeApplication.applicationDescriptor;
            var ns:Namespace=appXML.namespace();
            
            // filename is mandatory
            var elem:XMLList=appXML.ns::filename;
            
            // use name is if it exists in the application descriptor
            if ((appXML.ns::name).length() != 0)
            {
                elem=appXML.ns::name;
            }
            
            // See if element contains simple content
            if (elem.hasSimpleContent())
            {
                applicationName=elem.toString();
            }
            
            return applicationName;
        }
        
        private function statusUpdate(event:StatusUpdateEvent):void
        {
            // stop the event from triggering the update download/install by itself
            trace(event.toString());
            event.preventDefault();
            if (event.available) {
                var alertInfo:String="发现新版本(" + event.version + ") ，是否立即升级?";
                var alertTitle:String="升级提示";
                var alertFlag:uint=Alert.OK|Alert.CANCEL;
                
                Alert.okLabel = "是";
                Alert.cancelLabel = "下次再说";
                Alert.show(alertInfo,alertTitle,alertFlag,this,updateChoiceAlertHandler);
            }else
            {
                this.dispatchEvent(new Event(Event.COMPLETE));
            }
        }
        
        private function updateChoiceAlertHandler(event:CloseEvent) : void {
            trace("updateChoiceAlertHandler: "+event.toString());
            if (event.detail == Alert.OK) {
                appUpdater.downloadUpdate();
                trace("Alert.OK");
            }else{
                appUpdater.cancelUpdate();
                this.dispatchEvent(new Event(Event.COMPLETE));
                trace("Alert.cancel");
            }
        }
    
        private function beforeInstall(event:UpdateEvent):void
        {
            trace(event);
        }
        
        private function statusUpdateError(event:StatusUpdateErrorEvent):void
        {
            event.preventDefault();
        }
        
        private function downloadStarted(event:UpdateEvent):void
        {
            trace(event);
        }
        
        private function downloadProgress(event:ProgressEvent):void
        {
            var num:int = (event.bytesLoaded/event.bytesTotal)*100;
            trace("已更新软件 "+num+"%");
        }
        
        private function downloadComplete(event:UpdateEvent):void
        {
            event.preventDefault(); // prevent default install
        }
        
        private function downloadError(event:DownloadErrorEvent):void
        {
            event.preventDefault();
           trace(event.text);
        }
        
        private function updaterError(event:ErrorEvent):void
        {
            trace(event.text);
        }
        
        protected function isNewerVersionFunction(currentVersion:String, updateVersion:String):Boolean 
        {
            var local_vers:Array = currentVersion.split(‘.‘);
            var remote_vers:Array = updateVersion.split(‘.‘);
            var local_ver:int;
            var remote_ver:int; 
            var local_points:Number = 0; 
            var remote_points:Number = 0;
            
            for (var i:int=0; i<Math.max(local_vers.length, remote_vers.length); i++)
            {
                local_ver = local_vers.length <= i ? 0 : int(local_vers[i]);
                remote_ver = remote_vers.length <= i ? 0 : int(remote_vers[i]);
                local_points = local_points * 100 + local_ver;
                remote_points = remote_points * 100 + remote_ver;
            }
            return remote_points > local_points;
        }