Programmatically retrieving attachments over 64kilobytes

Greetings,

I'm trying to programmatically retrieve an attachment of the image of an e-mail sent to my Blackberry. My problem is that once the attachment is larger than 64 KB, I can't retrieve the data from the BIS server. All my tests is done on living material, and I sign my application.

In my application, I recorded an AttachmentHandler configured to accept the "" image / jpg "' and ' application/octet-stream' types (as suggested here), so the Message Multipart object contains a SupportedAttachmentPart. However, SupportedAttachmentPart.getContent returns an array of length zero * and * SupportedAttachmentPart.hasMore returns false. In addition, the Transport.more call has no apparent effect (so maybe I'm missing something important in this post?)

I think I have read all the existing threads about this, but I must be missing something. Can anyone give me some suggestions / approaches to try?

My test material is a 9000 "BOLD" running 4.6.0.167.

Here are a few test routines that I currently use.

This routine is supposed to read the fixing of the image in memory that I can handle: (not to worry about the memory usage, or multiple attachments, it's just a prototype )

private byte[] getPayload(Message message) {  if (message.getContent() instanceof Multipart) {      Multipart multi = (Multipart) message.getContent();

     System.out.println("in multipart - sz: " + multi.getCount());

       for (int i = 0; i < multi.getCount(); i++) {           BodyPart bp = multi.getBodyPart(i);           if (bp.hasMore()) {               System.out.println("Requesting more");                try {                 Transport.more(bp, true);             } catch (Exception e) {                   // TODO Auto-generated catch block                    e.printStackTrace();              }         }        }

       for (int i = 0; i < multi.getCount(); i++) {           BodyPart bp = multi.getBodyPart(i);           if (bp instanceof SupportedAttachmentPart) {              if (bp.getContent().getClass().isArray()) {                   byte[] content = (byte[]) bp.getContent();                    return content;              }         }     } }

  System.out.println("Found none"); return new byte[0];}

It sends an email with the attached test image (just for completeness)

menu.add(new MenuItem("Email Test",999,0) {

  public void run() {       try {         final Message msg = new Message();            msg.setSubject("Test Picture Attachment");            msg.addRecipient(Message.RecipientType.TO, new Address("[email protected]", "My Phone"));            msg.addRecipient(Message.RecipientType.CC, new Address("[email protected]", "My Gmail"));

          final Multipart parts = new Multipart();

          byte[] imageData = getImageDataFromDisk();

          final TextBodyPart textPart = new TextBodyPart(parts);            textPart.setContent("Cry 'God for Harry, England, and Saint George!'");

         final SupportedAttachmentPart imagePart = new SupportedAttachmentPart(parts);         imagePart.setContentType("image/jpg");            imagePart.setFilename("a.jpg");           imagePart.setContent(imageData);

          parts.addBodyPart(textPart);          parts.addBodyPart(imagePart);

           msg.setContent(parts);

          Transport.send(msg);      } catch (Throwable t) {           t.printStackTrace();      } }});

My attachment handler looks like:

private final class ShowAttachmentHandler implements AttachmentHandler {

    public String menuString() {      return "Show";    }

   public void run(Message m, SupportedAttachmentPart p) {       System.out.println("Attachment Handler Called");  }

   public boolean supports(String contentType) {     if (contentType == null)          return false;

       boolean result = contentType.toLowerCase().indexOf("jpg") != -1;      if (contentType.toLowerCase().indexOf("octet-stream") != -1) {            System.out.println("It's an octet stream");           result = true;        }

       return result;    }}

Thank you!

Just to answer myself: it seems that there is no way to download large attachments programmatically in the 4.x API series, but 5.0 adds AttachmentDownloadManager which does exactly what I'm looking for.

Tags: BlackBerry Developers

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