在Air应用中如何下载保存数据

2018-12-2 zhulinan Flash

如果在项目中要求App缓存服务器上的数据，Air For Android和Air For Desktop可以实现吗？答案是肯定的，下面是代码：

Air For Android
package com.dd234 { import flash.display.MovieClip; import flash.display.Loader; import flash.display.LoaderInfo; import flash.events.*; import flash.net.*; import flash.filesystem.*; import flash.utils.ByteArray; public class Main extends MovieClip { public function Main() { addEventListener(Event.ADDED_TO_STAGE, addedHandler); } private function addedHandler(e:Event):void { removeEventListener(Event.ADDED_TO_STAGE, addedHandler); btn1.addEventListener(MouseEvent.CLICK, btn1ClickHandler); btn2.addEventListener(MouseEvent.CLICK, btn2ClickHandler); addEventListener(Event.REMOVED_FROM_STAGE, removedHandler); } private function btn1ClickHandler(e:MouseEvent):void { trace(rdBtn1.selected, rdBtn2.selected); var loader = new URLLoader(); loader.dataFormat = URLLoaderDataFormat.BINARY; //用二进制的方式读取 configureListeners(loader); var request:URLRequest = new URLRequest("http://www.dd234.com/test/dh.swf"); //文件不限于swf格式，数据仅用于本例测试 try { loader.load(request); } catch (error:Error) { trace("Unable to load requested document."); } } private function configureListeners(dispatcher:IEventDispatcher):void { dispatcher.addEventListener(Event.COMPLETE, completeHandler); dispatcher.addEventListener(Event.OPEN, openHandler); dispatcher.addEventListener(ProgressEvent.PROGRESS, progressHandler); dispatcher.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler); dispatcher.addEventListener(HTTPStatusEvent.HTTP_STATUS, httpStatusHandler); dispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler); } private function completeHandler(event:Event):void { var url:String; if (rdBtn1.selected) { //应用程序目录 url = File.applicationDirectory.nativePath + "/data/dh.swf"; //测试发现数据无法写入 } else { //设备内部存储目录 var rt:File = File.documentsDirectory.resolvePath("/sdcard/data/elight/"); //数据可以写入 url = rt.url + "/dh.swf"; } var file:File = new File(url); var ba:ByteArray = event.target.data as ByteArray; var fileStream:FileStream = new FileStream(); fileStream.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler2); //fileStream.openAsync(file, FileMode.WRITE); //ioErrorHandler2事件会响应 fileStream.open(file, FileMode.WRITE); //ioErrorHandler2事件不会响应 fileStream.writeBytes(ba); fileStream.close(); } private function openHandler(event:Event):void { trace("openHandler: " + event); txtTs.text = "openHandler: " + event; } private function progressHandler(event:ProgressEvent):void { trace("progressHandler loaded:" + event.bytesLoaded + " total: " + event.bytesTotal); txtTs.text = "progressHandler loaded:" + event.bytesLoaded + " total: " + event.bytesTotal; } private function securityErrorHandler(event:SecurityErrorEvent):void { trace("securityErrorHandler: " + event); txtTs.text = "securityErrorHandler: " + event; } private function httpStatusHandler(event:HTTPStatusEvent):void { trace("httpStatusHandler: " + event); txtTs.text = "httpStatusHandler: " + event; } private function ioErrorHandler(event:IOErrorEvent):void { txtTs.text = "ioErrorHandler: " + event; } private function ioErrorHandler2(event:IOErrorEvent):void { txtTs.text = "写文件出错"; } private function btn2ClickHandler(e:MouseEvent):void { var url:String; if (rdBtn1.selected) { //应用程序目录 url = File.applicationDirectory.nativePath + "/data/dh.swf"; } else { //设备内部存储目录 var rt:File = File.documentsDirectory.resolvePath("/sdcard/data/elight/"); url = rt.url + "/dh.swf"; } var ld:Loader = new Loader(); configureListenersLd(ld.contentLoaderInfo); ld.load(new URLRequest(url)); } private function configureListenersLd(dispatcher:IEventDispatcher):void { dispatcher.addEventListener(Event.COMPLETE, ldCompleteHandle); dispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler); } private function ldCompleteHandle(e:Event):void { txtTs.text = e.target.url; e.target.removeEventListener(Event.COMPLETE, ldCompleteHandle); var mc:MovieClip = e.target.loader.content as MovieClip; addChild(mc); } private function removedHandler(e:Event):void { trace("Dd234Connect is removed"); } } }

Air For Desktop
package com.dd234 { import flash.display.MovieClip; import flash.display.Loader; import flash.display.LoaderInfo; import flash.events.*; import flash.net.*; import flash.filesystem.*; import flash.utils.ByteArray; public class Main extends MovieClip { public function Main() { addEventListener(Event.ADDED_TO_STAGE, addedHandler); } private function addedHandler(e:Event):void { removeEventListener(Event.ADDED_TO_STAGE, addedHandler); btn1.addEventListener(MouseEvent.CLICK, btn1ClickHandler); btn2.addEventListener(MouseEvent.CLICK, btn2ClickHandler); addEventListener(Event.REMOVED_FROM_STAGE, removedHandler); } private function btn1ClickHandler(e:MouseEvent):void { trace(rdBtn1.selected, rdBtn2.selected); var loader = new URLLoader(); loader.dataFormat = URLLoaderDataFormat.BINARY; //用二进制的方式读取 configureListeners(loader); var request:URLRequest = new URLRequest("http://www.dd234.com/test/dh.swf"); //文件不限于swf格式，数据仅用于本例测试 try { loader.load(request); } catch (error:Error) { trace("Unable to load requested document."); } } private function configureListeners(dispatcher:IEventDispatcher):void { dispatcher.addEventListener(Event.COMPLETE, completeHandler); dispatcher.addEventListener(Event.OPEN, openHandler); dispatcher.addEventListener(ProgressEvent.PROGRESS, progressHandler); dispatcher.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler); dispatcher.addEventListener(HTTPStatusEvent.HTTP_STATUS, httpStatusHandler); dispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler); } private function completeHandler(event:Event):void { var url:String; if (rdBtn1.selected) { //应用程序目录 url = File.applicationDirectory.nativePath + "/data/dh.swf"; } else { //应用程序存储目录 url = File.applicationStorageDirectory.nativePath + "/data/dh.swf"; } var file:File = new File(url); var ba:ByteArray = event.target.data as ByteArray; var fileStream:FileStream = new FileStream(); fileStream.open(file, FileMode.WRITE); fileStream.writeBytes(ba); fileStream.close(); } private function openHandler(event:Event):void { trace("openHandler: " + event); txtTs.text = "openHandler: " + event; } private function progressHandler(event:ProgressEvent):void { trace("progressHandler loaded:" + event.bytesLoaded + " total: " + event.bytesTotal); txtTs.text = "progressHandler loaded:" + event.bytesLoaded + " total: " + event.bytesTotal; } private function securityErrorHandler(event:SecurityErrorEvent):void { trace("securityErrorHandler: " + event); txtTs.text = "securityErrorHandler: " + event; } private function httpStatusHandler(event:HTTPStatusEvent):void { trace("httpStatusHandler: " + event); txtTs.text = "httpStatusHandler: " + event; } private function ioErrorHandler(event:IOErrorEvent):void { trace("ioErrorHandler: " + event); txtTs.text = "ioErrorHandler: " + event; } private function btn2ClickHandler(e:MouseEvent):void { var url:String; if (rdBtn1.selected) { //应用程序目录 url = File.applicationDirectory.nativePath + "/data/dh.swf"; } else { //应用程序存储目录 url = File.applicationStorageDirectory.nativePath + "/data/dh.swf"; } var ld:Loader = new Loader(); configureListenersLd(ld.contentLoaderInfo); ld.load(new URLRequest(url)); } private function configureListenersLd(dispatcher:IEventDispatcher):void { dispatcher.addEventListener(Event.COMPLETE, ldCompleteHandle); dispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler); } private function ldCompleteHandle(e:Event):void { txtTs.text = "OK"; e.target.removeEventListener(Event.COMPLETE, ldCompleteHandle); var mc:MovieClip = e.target.loader.content as MovieClip; addChild(mc); } private function removedHandler(e:Event):void { trace("Dd234Connect is removed"); } } }