Messaging with the Wireless Messaging API - Beginning Java ME Platform - page 371

1. Create one or more instances of MessagePart , passing the contents of each part, its
ID, and the part type to the MessagePart constructor.
2. Create an instance of MultipartMessage by invoking newMessage on a
MessageConnection instance.
3. Add the parts you created in the first step to the MultipartMessage using
addMessagePart .
4. Set the message's subject (if any) using the MultipartMessage 's setSubject method.
5. Set the message's recipients using the MultipartMessage 's addAddress method.
Listing 14-2 shows pseudocode for this sequence to send a single PNG image.
Listing 14-2. Pseudocode to Send a Single PNG Image in a Multipart Message
String address = "mms://" + receiver + ":" + appId;
MessageConnection c = null;
try {
c = (MessageConnection) Connector.open(address);
MultipartMessage mpm = (MultipartMessage)c.newMessage(
MessageConnection.MULTIPART_MESSAGE);
mpm.setSubject("An image");
InputStream is = getClass().getResourceAsStream("/img/i.png");
byte[] bImage = new byte[is.available()];
is.read(bImage);
mpm.addMessagePart(new MessagePart(bImage, 0, bImage.length,
"image/png", "id1", null, null));
c.send(mpm);
} catch (Exception e) { /* recover */ }
finally {
if (c != null) {
try {
c.close();
} catch (IOException e) { /* recover */}
}
}
This code begins in the same manner as Listing 14-1, except that it creates a
MultipartMessage instance instead of a TextMessage instance. Next, it sets its subject to
"An image" . After that, it uses an InputStream instance to read the entire image into