Adob​​e Air多国下载

Question

我一直在寻找一个完整的答案，以实现多个下载的MP3文件downloadManager的web和stackoverflow。我已经阅读了大量的文章，并意识到最高效的设施是使用ByteArray，URLStream和FileStream来节省t盘。我执行如下：

<?xml version="1.0" encoding="utf-8"?> 
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
xmlns:s="library://ns.adobe.com/flex/spark" 
xmlns:mx="library://ns.adobe.com/flex/mx"  
creationComplete="downloadFiles()"> 
<fx:Declarations> 

</fx:Declarations> 
<fx:Script> 
<![CDATA[ 
import flash.filesystem.*; 
import flash.net.URLStream; 
public var stream:URLStream; 
public var fileData:ByteArray; 
public var fileStream:FileStream; 
public var file:File; 
public var trackString:String; 
public var filearray:Array; 
public var urlReq:URLRequest; 

private function downloadFiles():void 
{ 
filearray = new Array(); 
filearray[0]="Crazy"; 
filearray[1]="Distant Lover"; 
filearray[2]="Easy Going"; 
filearray[3]="Give In To Love"; 
filearray[4]="MuzicAgeErotic Moods"; 
filearray[5]="MuzicAgeGive In To Love"; 
filearray[6]="MuzicAgePieces Of Dreams"; 
filearray[7]="MuzicAgeThere will never be another you"; 
filearray[8]="Remembered"; 
filearray[9]="Teach Me Tonight"; 

downloadNextFile(); 
} 
private function downloadNextFile():void{ 
trackString = filearray.shift(); 
urlReq = new URLRequest("http://localhost:8080/multiDownloadSampleApp7- debug/MuzicAge/"+trackString+".mp3"); 
stream = new URLStream(); 
file = File.documentsDirectory.resolvePath("C:/Users/development/test/"+trackString+".mp3"); 
fileStream = new FileStream(); 
stream.addEventListener(ProgressEvent.PROGRESS, progressBar); 
stream.addEventListener(Event.COMPLETE, writeComplete); 
stream.load(urlReq); 

} 

private function writeComplete(evt:Event):void 
{  
fileData = new ByteArray();  
stream.readBytes(fileData,0,stream.bytesAvailable); 
fileStream.openAsync(file, FileMode.WRITE)  
fileStream.writeBytes(fileData,0,fileData.length);  
fileStream.close();   
stream.removeEventListener(ProgressEvent.PROGRESS, progressBar);  
stream.removeEventListener(Event.COMPLETE, writeComplete); 

downloadNextFile(); 
} 

private function progressBar(evt:ProgressEvent):void 
{  
// progressBar 

} 

]]> 
</fx:Script> 
</s:WindowedApplication> 

虽然它似乎捕获并保存所有的MP3的磁盘，我不断收到以下错误信息。
错误＃2044：未处理的IOErrorEvent :.文本=错误＃2032：流错误。在multiDownloadSampleApp7/writeComplete（）[C：\ Users \ development \ newgageProjects \ multiDownloadSampleApp7 \ src \ multiDownloadSampleApp7.mxml：multiDownloadSampleApp7/downloadNextFile（）[C：\ Users \ development \ newgageProjects \ multiDownloadSampleApp7 \ src \ multiDownloadSampleApp7.mxml：40] 59] [卸载SWF] multiDownloadSampleApp7.swf

当我关闭错误并查看保存目录时，我找到了我在数组中请求的所有MP3。

Answer 1

看起来好像你没有完成下载所有的文件，然后你打电话给downloadNextFile()。

所以错误可能只是它到达数组的末尾，然后尝试生成一个空字符串的URLRequest。