Wireless Messaging API - Beginning J2ME: From Novice to Professional - page 178

In Listing 11-2, Sender is a singleton; the static getInstance() factory method is used to get
the one and only instance. The sendMsg() method is used by SMSMIDlet to send the SMS message.
It assigns the incoming arguments to member variables, and then starts a thread to send the
message. The mSending boolean flag is used to avoid reentrant calls and to stop the MIDlet from
shutting down if message sending is in progress. The actual work of sending SMS messages is
performed in the sendSMS() method. The sendSMS() method is always called from a new thread.
sendSMS() opens a new MessageConnection using a specified address and sends a text message
to the destination.

Testing SMSMIDlet with WTK 2.x WMA Console
You can easily test SMSMIDlet , or any SMS application, using a utility called the WMA console in
WTK 2.x. To access the WMA console, select File ➤ Utilities from KToolbar. Then click the

Open Console button in the WMA box.
To test SMSMIDlet , first start an instance in an emulator. Answer yes to the security question
when it starts up. Note on the title bar of the emulator that a phone number, beginning with
a + (plus sign), has been assigned to the emulator. By default, it will be +5550000 . This is the
address of the emulator instance.
Now, start the WMA console. You will note that the WMA console is also assigned a phone
number beginning with a + sign. Click the Send SMS button. Select the address of the emulator
instance on the Text SMS tab, enter 1234 into the Port box, and then enter red for the message.
Click the Send button. Note that the SMSMIDlet instance now displays an image with a red back-
ground. Try sending an SMS message containing “blue” and observe how the SMSMIDlet instance
changes the graphics to a blue background.
Next, enter the address of the WMA console into the “Connect to:” text field of the SMSMIDlet
instance. Then select Send Red from the menu of SMSMIDlet . Note that the console displays a
message to indicate receipt of the SMS message. Figure 11-3 shows the WMA console interacting
with SMSMIDlet .
Instead of using the WMA console, you can also start two emulator instances of SMSMIDlet
and send SMS messages between them.