Hi,
In my application I want that the user is notified that he/she has entered in
the radius of a particular location. I have the functionality working when the
application is alive and in the foreground. I will however want that the user
is also notified when the application is not working and not there in the
foreground.
In the previous posts I have found out that this can be done by using an
addProximityAlert().
I have tried to implement the code for adding ProximityAlert with a
BroadcastReceiver, but its not working some how. Below is the snippet from my
code (posted below) requesting all to please have a look and help me out with
it.
<code>
package com.android.locationmang;
public class ViewAActivity extends ListActivity implements LocationListener{
private static final String PROX_ALERT_INTENT =
"com.android.locationmang.PROX_ALERT_INTENT";
private static final long LOCAL_FILTER_DISTANCE = 1200;
public static List<UserLocation> notifiedLocationsList;
public static Location latestLocation;
PendingIntent pendingIntent;
Intent notificationIntent;
private LocationManager locationManager;
List<UserLocations> userLocations;
private IntentFilter filter;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
notifiedLocationsList = new ArrayList<UserLocation>();
userLocations = getUserLocations(); //Returns a list of user Locations
stored by the user on the DB
filter = new IntentFilter(PROX_ALERT_INTENT);
}
private void setUpLocation() {
locationNotificationReceiver = new LocationNotificationReceiver();
locationManager = (LocationManager)
getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
60, 5, this);
for (int i = 0; i < userLocation.size(); i++){
UserLocation userLocation = userLocation.get(i);
if(!(userLocation.isComplete())){
setProximityAlert(userLocation.getLatitude(),
userLocation.getLongitude(),
i+1,
i);
}
}
registerReceiver(locationNotificationReceiver, filter);
}
private void setProximityAlert(double lat, double lon, final long eventID,
int requestCode){
// Expiration is 10 Minutes (10mins * 60secs * 1000milliSecs)
long expiration = 600000;
Intent intent = new Intent(this,
LocationNotificationReceiver.class);
intent.putExtra(LocationNotificationReceiver.EVENT_ID_INTENT_EXTRA,
eventID);
PendingIntent pendingIntent =
PendingIntent.getBroadcast(getApplicationContext(), requestCode, intent,
PendingIntent.FLAG_CANCEL_CURRENT);
locationManager.addProximityAlert(lat, lon, LOCAL_FILTER_DISTANCE,
expiration, pendingIntent);
}
@Override
protected void onResume() {
super.onResume();
setUpLocation();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
60, 5, this);
}
@Override
protected void onPause() {
super.onPause();
locationManager.removeUpdates(this);
unregisterReceiver(locationNotificationReceiver);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
public boolean userLocationIsWithinGeofence(UserLocation userLocation,
Location latestLocation, long localFilterDistance) {
float[] distanceArray = new float[1];
Location.distanceBetween(userLocation.getLatitude(),
userLocation.getLongitude(), latestLocation.getLatitude(),
latestLocation.getLongitude(), userLocation.getAssignedDate(),distanceArray);
return (distanceArray[0]<localFilterDistance);
}
public void onLocationChanged(Location location) {
if (location != null) {
latestLocation = location;
for (UserLocation userLocation : userLocations) {
if (!(userLocations.isVisited()) &&
userLocationIsWithinGeofence(userLocation, latestLocation,
LOCAL_FILTER_DISTANCE)) {
notifiedLocationsList.add(userLocation);
}
}
}
}
}
</code>
Code for BroadcastReceiver
<code>
package com.android.locationmang;
public class LocationNotificationReceiver extends BroadcastReceiver {
private static final int NOTIFICATION_ID = 1000;
public static final String EVENT_ID_INTENT_EXTRA = "EventIDIntentExtraKey";
@SuppressWarnings("deprecation")
@Override
public void onReceive(Context context, Intent intent) {
String key = LocationManager.KEY_PROXIMITY_ENTERING;
long eventID = intent.getLongExtra(EVENT_ID_INTENT_EXTRA, -1);
Boolean entering = intent.getBooleanExtra(key, false);
if (entering) {
Log.d(getClass().getSimpleName(), "entering");
}
else{
Log.d(getClass().getSimpleName(), "exiting");
}
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager)
context.getSystemService(ns);
Intent notificationIntent = new Intent(context,
MarkAsCompleteActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0,
notificationIntent, 0);
Notification notification = createNotification();
notification.setLatestEventInfo(context, "Proximity Alert!", "You are
near your point of interest.", pendingIntent);
mNotificationManager.notify(NOTIFICATION_ID, notification);
}
private Notification createNotification() {
Notification notification = new Notification();
notification.icon = R.drawable.ic_launcher;
notification.when = System.currentTimeMillis();
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notification.flags |= Notification.FLAG_SHOW_LIGHTS;
notification.defaults |= Notification.DEFAULT_VIBRATE;
notification.defaults |= Notification.DEFAULT_SOUND;
notification.defaults |= Notification.DEFAULT_LIGHTS;
notification.ledARGB = Color.WHITE;
notification.ledOnMS = 1500;
notification.ledOffMS = 1500;
return notification;
}
}
</code>
I have this userLocations list. I am adding Proximity Alert to all the user
mentioned location by running a for loop for the list. I only want to add a
proximity Alert to the user location if that particular location has not been
visited by the user before. I then register the receiver in the
addLocationProximity() method, which is called from the onResume() method. I
unregisterReceiver the receiver in the onPause() method.
I have also used the onLocationChanged() method to populate a list (which I
would be needing for later) based on the same logic which have been used to add
the proximity alert. I had the code working perfectly when I was working only
with the onLocationChanged. The problem started when I was using the
onLocationChanged along with the addProximityAlert. Now the onLocationChanged()
never gets called. Can someone now why this has broken is there a limitation of
using these 2 together?
Please do let me know if any of these steps have not been carried out correctly.
Thanks in advance.
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