Android™ Application Development - Bahar Ali Khan

Chapter 8: Working in the Background
4.1. Starting with the Earthquake Activity, modify the onCreate method to get a reference
to the Notifi cation Manager.
NotificationManager notificationManager;
@Override
public void onCreate(Bundle icicle) {
[ ... existing onCreate ... ]
}
String svcName = Context.NOTIFICATION_SERVICE;
notificationManager = (NotificationManager)getSystemService(svcName);
4.2. Modify the onReceive method of the EarthquakeReceiver. As this is only registered
(so it will only execute) when the Activity is active, you can safely cancel
all Notifi cation earthquake Notifi cations here as soon as they’re triggered.
@Override
public void onReceive(Context context, Intent intent) {
loadQuakesFromProvider();
}
notificationManager.cancel(EarthquakeService.NOTIFICATION_ID);
4.3. Next, extend the onResume method to cancel the Notifi cation when the Activity
becomes active.
@Override
public void onResume() {
notificationManager.cancel(EarthquakeService.NOTIFICATION_ID);
}
IntentFilter filter;
filter = new IntentFilter(EarthquakeService.NEW_EARTHQUAKE_FOUND);
receiver = new EarthquakeReceiver();
registerReceiver(receiver, filter);
super.onResume();
4.4. Repeat the same process with the EarthquakeMap Activity.
NotificationManager notificationManager;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.earthquake_map);
ContentResolver cr = getContentResolver();
earthquakeCursor = cr.query(EarthquakeProvider.CONTENT_URI,
null, null, null, null);
MapView earthquakeMap = (MapView)findViewById(R.id.map_view);
earthquakeMap.getOverlays().add(new EarthquakeOverlay(earthquakeCursor));
String svcName = Context.NOTIFICATION_SERVICE;
notificationManager = (NotificationManager)getSystemService(svcName);
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