Adob​​e Air多國下載

Question

我一直在尋找一個完整的答案，以實現多個下載的MP3文件downloadManager的web和stackoverflow。我已經閱讀了大量的文章，並意識到最高效的設施是使用ByteArray，URLStream和FileStream來節省t盤。我執行如下：

<?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> 

雖然它似乎捕獲並保存所有的MP3的磁盤，我不斷收到以下錯誤信息。
錯誤＃2044：未處理的IOErrorEvent :.文本=錯誤＃2032：流錯誤。在multiDownloadSampleApp7/writeComplete（）[C：\ Users \ development \ newgageProjects \ multiDownloadSampleApp7 \ src \ multiDownloadSampleApp7.mxml：multiDownloadSampleApp7/downloadNextFile（）[C：\ Users \ development \ newgageProjects \ multiDownloadSampleApp7 \ src \ multiDownloadSampleApp7.mxml：40] 59] [卸載SWF] multiDownloadSampleApp7.swf

當我關閉錯誤並查看保存目錄時，我找到了我在數組中請求的所有MP3。

Answer 1

看起來好像你沒有完成下載所有的文件，然後你打電話給downloadNextFile()。

所以錯誤可能只是它到達數組的末尾，然後嘗試生成一個空字符串的URLRequest。