Android™ Application Development - Bahar Ali Khan

Chapter 9: Peer-to-Peer Communication
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13.4. Finally, register the new Broadcast Receiver by extending the onCreate method of the
Emergency Responder Activity.
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
}
lock = new ReentrantLock();
requesters = new ArrayList();
wireUpControls();
IntentFilter filter = new IntentFilter(SMS_RECEIVED);
registerReceiver(emergencyResponseRequestReceiver, filter);
IntentFilter attemptedDeliveryfilter = new IntentFilter(SENT_SMS);
registerReceiver(attemptedDeliveryReceiver, attemptedDeliveryfilter);
You can now run the application. To test it, you need to open two emulator instances with the application
running in one of them.
Use the DDMS emulator controls to mimic sending an “are you safe” message from one emulator to the
other (using its port number as the originating number). When you press one of the response buttons,
you should see a new SMS message appear in the mimicked emulator.
Automating the Emergency Responder
In the following example, you’ll fi ll in the code behind the Set up Auto Responder button added in the
previous example, to let the Emergency Responder automatically respond to status update requests.
1. Start by creating a new autoresponder.xml layout resource that will be used to lay out the automatic
response confi guration window. Include an EditText for entering a status message to
send, a Spinner to choose the auto-response expiry time, and a CheckBox to let users choose if
they want to include their location in the automated responses.