public String menuString() {

    return "Custom Attachment Viewer";

}

public void run(Message m, SupportedAttachmentPart p) {

    // Perform processing on data.

    Screen view = new Screen();

    view.setTitle(new LabelField("Attachment Viewer"));

    view.add(new RichTextField(new String((byte[])p.getContent())));

}

AttachmentHandlerManager m = AttachmentHandlerManager.getInstance();

CustomAttachmentHandler ah = new CustomAttachmentHandler();

m.addAttachmentHandler(ah);

String s = new String((byte[])p.getContent());

public void run(Message m, SupportedAttachmentPart p) {

     ...

     String name = p.getName();

     int size = p.getSize();

    }

MultiPart multipart = new MultiPart(); // Default type of multipart/mixed.

SupportedAttachmentPart attach =

    new SupportedAttachmentPart( multipart, "application/x-example", "filename", data);

multipart.addBodyPart(attach); // Add the attachment to the multipart.

msg.setContent(multipart);

Transport.send(msg); // Send the message.