Android™ Application Development - Bahar Ali Khan

Chapter 8: Working in the Background
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}
@Override
public void onResume() {
notificationManager.cancel(EarthquakeService.NOTIFICATION_ID);
}
earthquakeCursor.requery();
IntentFilter filter;
filter = new IntentFilter(EarthquakeService.NEW_EARTHQUAKE_FOUND);
receiver = new EarthquakeReceiver();
registerReceiver(receiver, filter);
super.onResume();
public class EarthquakeReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
notificationManager.cancel(EarthquakeService.NOTIFICATION_ID);
}
}
earthquakeCursor.requery();
MapView earthquakeMap = (MapView)findViewById(R.id.map_view);
earthquakeMap.invalidate();
Advanced Notifi cation Techniques
In the following sections, you’ll learn to enhance Notifi cations to provide additional alerting through
hardware, in particular, by making the device ring, fl ash, and vibrate.
As each enhancement is described, you will be provided with a code snippet that can be added to the
Earthquake example to provide user feedback on the severity of each earthquake as it’s detected.
To use the Notifi cation techniques described here without also displaying the status bar icon, simply
cancel the Notifi cation directly after triggering it. This stops the icon from displaying but doesn’t interrupt
the other effects.
Making Sounds
Using an audio alert to notify the user of a device event (like incoming calls) is a technique that predates
the mobile, and has stood the test of time. Most native phone events from incoming calls to new
messages and low battery are announced by an audible ringtone.
Android lets you play any audio fi le on the phone as a Notifi cation by assigning a location URI to the
sound property, as shown in the snippet below:
notification.sound = ringURI;
To use your own custom audio, push the fi le onto your device, or include it as a raw resource, as
described in Chapter 6.