Question

I made a little gps app for some reason onLocationChanged not refreshing, it only run once, on app start.

Here is my code:

public BackgroundLocationService() {
        super("myintentservice");

        locManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

        Criteria crt = new Criteria();
        crt.setAccuracy(Criteria.ACCURACY_FINE);
        String bestProvider = locManager.getBestProvider(crt, true);

        boolean gps_enabled;
        boolean network_enabled;
        boolean best_enabled;

        gps_enabled = locManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
        network_enabled = locManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
        best_enabled = locManager.isProviderEnabled(bestProvider);


        if (best_enabled) {
            locManager.requestLocationUpdates(bestProvider, 15000, 20, locListener);
            Log.i(TAG, "Best enabled: " + bestProvider);
        } else {
            Log.i("Location Provider: ", "best not enabled: " + bestProvider);
            if (gps_enabled) {
                locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locListener);
                Log.i(TAG, "gps enabled!");
            }
            if (network_enabled) {
                locManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locListener);
                Log.i(TAG, "network enabled!");
            }
        }

    }



    class MyLocationListener implements LocationListener {
        public void onLocationChanged(Location location) {

            if (location != null) {

                //locManager.removeUpdates(locListener);
                longitude = Double.toString(location.getLongitude());
                latitude = Double.toString(location.getLatitude());

                Log.i(TAG,"Location has CHANGED!");
            }
        }
        public void onProviderDisabled(String arg) {}
        public void onProviderEnabled(String arg) {}
        public void onStatusChanged(String provider, int status, Bundle extras) {}
    }

The “Location has CHANGED!” message only shows once with each app start.
Im in an office but i can move at least 5-10 meters away from my position and ALL the providers are enabled so it must be Ok, isnt it?

Any ideas ?

Answer 1

When you register the location listener, you’re requesting updates with a min time of 15 seconds and a minimum distance of 20 meters. Since you’re inside an office, it’s unlikely that you’re able to get an accurate enough GPS fix to actually detect a move of 5-10 meters. Have you tried debugging outside? Similarly, if you enabled mock locations, send mock coordinates to the emulator to ensure your app acts as you expect when locations are updated.