Download and save audio and video files

Hello

I am trying to record audio and video files that are larger than 5 MB in size.

I open a Http connection and asking to 128 KB each time until the completion of the data transmission.

for some files that are 1 to 2 MB code does not work well, but if you have large files MB it throws the error, ' Eception Exception: myApp Application (201) does not; process is completed"

How can I fix this error. I searched the forum for this error, I found some funda but has not found a solution.

AM making ala invokeAndLater() and therefore not blocking is not the eventThread.

Here is the flow of my code that establishes the connection and starts to download.

the following code snippet shows the flow of the code.

// Constructor: displays a popup screen that allows the user to select a list of audio/video files for the download. 

// Dictionary obj is a vector that contains list of file names.// IAudioVideoPopUp is an interface implemented by the caller. 

public AudioVideoPopUp(Dictionary[] v, IAudioVideoPopUp guideIntroManager)  {     super(new VerticalFieldManager());        if( v!= null)     {         caller = guideIntroManager;           for(int i =0; i< v.length; i++)            {             btnFileNames = new MyButtonField(v[i].value.toString(), "images/button1_big.png", "images/button2_big.png",  true, Font.PLAIN, 18, v[i]);             btnFileNames.setChangeListener(new FieldChangeListener()              {                     public void fieldChanged(Field field, int context)                    {                     if(field instanceof MyButtonField)                        {                         final MyButtonField tempField = (MyButtonField) field;                            UiApplication.getUiApplication().popScreen(UiApplication.getUiApplication().getActiveScreen());                           synchronized (UiApplication.getEventLock()) {                             UiApplication.getUiApplication().invokeLater(new Runnable(){                                  public void run()                                 {                                     UiApplication.getUiApplication().pushScreen(new WaitScreen());                                        caller.onClick(((MyButtonField) tempField).getDictionaryData());                                  }                             });                           }//                           PopupCloseThread pct = new PopupCloseThread(field);//                         pct.start();                      }                 }             });               add(btnFileNames);            }

          btnCancel = new MyButtonField("Close", "images/button1.png", "images/button2.png", true, Font.PLAIN, 18);         btnCancel.setChangeListener(new FieldChangeListener()             {                 public void fieldChanged(Field field, int context)                {                 UiApplication.getUiApplication().popScreen(UiApplication.getUiApplication().getActiveScreen());               }         });           add(btnCancel);       }

   }

// onClick method that was implemented in the caller. 

// dictionary is a vector, contains info about the selected file in the popup.

public void onClick(Dictionary dictionary)   {     if(dictionary != null)        {         switch(ContentType)           {         case 1:               playAudio(dictionary);                break;            case 2:               videoSelected(dictionary);                break;            default:              break;            }     } }

// the following code calls for the downloading and saving of the file.

private boolean downloadAndSaveVideo(long movieID2, String fileName, String URL, int fileSize)    {     if(URL!= null)        {         try           {             String videoFileURL = AppConstants.SDCARD+AppConstants.CONTENT_PATH+fileName;             if(new DownloadCombiner(URL, videoFileURL, 128*1024).run())               {                 return updateVideoTable(movieID2, videoFileURL);              }         }             catch (Exception e)           {             Tools.print("XCO: GuideIntroManager: downloadAndSave: Error..:" + e.toString());          }     }     return false; }

// this is not a thread class. // here an repeatdly making the requests to get all the data.// please go thru the run().

public DownloadCombiner(String remoteName, String localName,         /*int connection,*/ int chunksize)    {     this.remoteName = remoteName;     this.localName = localName;       this.chunksize = chunksize;   }

public boolean run()     {     boolean result = false;       try       {         int chunkIndex = 0;           int totalSize = 0;

          /*             * File connection             */           FileConnection file = (FileConnection) Connector.open(localName);         if (!file.exists()) {             file.create();            }         file.setWritable(true);           OutputStream out = file.openOutputStream();

         /*             * HTTP Connections            */           String currentFile = remoteName; //+ connectionType();            Tools.Debug("Full URL: " + currentFile);          HttpConnection conn;          InputStream in;           int rangeStart = 0;           int rangeEnd = 0;         while(true)           {             Tools.Debug("Opening Chunk: " + chunkIndex);

              conn = (HttpConnection) Connector.open(currentFile,Connector.READ_WRITE, true);

              rangeStart = chunkIndex * chunksize;              rangeEnd = rangeStart + chunksize - 1;

              Tools.Debug("Requesting Range: " + rangeStart + "-" + rangeEnd);

              conn.setRequestProperty("Range", "bytes=" + rangeStart + "-"+ rangeEnd);

              int responseCode = conn.getResponseCode();                if(responseCode != 200 && responseCode != 206)                {                 Tools.Debug("Response Code = " + conn.getResponseCode());                 break;                }

              Tools.Debug("Retreived Range: "+ conn.getHeaderField("Content-Range"));

              in = conn.openInputStream();              int length = -1;              byte[] readBlock = new byte[256];             int fileSize = 0;

              while((length = in.read(readBlock)) != -1)                {                 out.write(readBlock, 0, length);                  fileSize += length;                   //Thread.yield(); // Try not to get cut off               }             totalSize += fileSize;

              Tools.Debug("Chunk Downloaded: " + fileSize + " Bytes");              chunkIndex++; // index (range) increase               in.close();               conn.close();             in = null;                conn = null;              /*                 * Pause to allow connections to close and other Threads to run.               */               //Thread.sleep(1000);         }         Tools.Debug("Full file downloaded: " + totalSize + " Bytes");         if(totalSize>0)            {             result = true;                Tools.Debug("Wrote file to local storage");           }else{                result = false;               file.delete();            }         out.close();          file.close();     }         catch (Exception e)       {         result = false;           Tools.Debug(e.toString());        }

      return result;    }

A little patience please.  Don't forget that you are awake does not mean that other people are.  I'd leave a Thread open for at least 24 hours before bumping.

I'm sorry to tell you that invokeLater runs the executable on the wire of the event, not a separate Thread.  If you have actually started the treatment in the very thing you're trying to get away from.

You must run the execution in DownloadCombiner treatment in a separate Thread.  This is why, in the article, which I suppose you DownloadCombiner, it extends Thread.

Just for the record, DownloadCombiner is here:

How - to download large files using the BlackBerry Mobile data system
Article number: DB-00619
http://www.BlackBerry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800332/800431/How_To _...

Tags: BlackBerry Developers

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