Question

Hi am trying get GPS using network provider and GPS provider. but am getting the same value.the value is not updated.ie my onlocation value is noy updated.

   private Location networkLoc;
   private Location gpsLoc;
   private static double lat;
   private static  TextView latituteField1;
   private static TextView longitudeField1; 
   private static double lng ;
   private static double  lat1;
   private static double lng1 ;
   provider = locationManager.getBestProvider(criteria, false);
   networkLoc = locationManager.getLastKnownLocation(provider);
   gpsLoc = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

 if (networkLoc != null) {
System.out.println("Provider " + provider + " has been selected.");
  lat1 = (double) (networkLoc.getLatitude());
 lng1 = (double) (networkLoc.getLongitude());
latituteField.setText(Double.toString(lat1));
longitudeField.setText(Double.toString(lng1));
  } 
  if ( gpsLoc  != null) {
System.out.println("Provider " + provider + " has been selected.");
     lat = (double) (gpsLoc.getLatitude());
 lng = (double) (gpsLoc.getLongitude());
latituteField1.setText(Double.toString(lat));
longitudeField1.setText(Double.toString(lng));

     }
@Override
public void onLocationChanged(Location location) {
  lat1 = (double) (networkLoc.getLatitude());
     lng1 = (double) (networkLoc.getLongitude());
    latituteField.setText(Double.toString(lat1));//these two values are same
    longitudeField.setText(Double.toString(lng1));      
    lat = (double) (gpsLoc.getLatitude());
     lng = (double) (gpsLoc.getLongitude());
    latituteField1.setText(Double.toString(lat));//these two values are same
    longitudeField1.setText(Double.toString(lng));              
     }

Answer 1

I would take a good look at this blog post: A Deep Dive Into Location. It will provide you with a number of best practices. Calling getLastKnownLocation is not going to start the location providers. You should use requestLocationUpdates. See snippet below:

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

Criteria fineCriteria.setAccuracy(Criteria.ACCURACY_FINE);
String fineProvider = lm.getBestProvider(fineCriteria, true);

// Start the fine location listener
lm.requestLocationUpdates(fineProvider, 0, 0, locationListenerFine);

private LocationListener locationListenerFine = new LocationListener() {
    public void onLocationChanged(Location location) {

    }

    public void onProviderDisabled(String provider) {
    }

    public void onProviderEnabled(String provider) {
    }

    public void onStatusChanged(String provider, int status, Bundle extras) {
    }
};