在android 4.0中定位到android studio中的位置问题

Question

i want to get user latitude and longtude in Service , i tried in android under 4.4 and all the thins work good but in android 4.4 to up i cant get user location already i have all permissions and location is enable .

at the end : if anyway is for get location in service , without opening map please tell me

this is my code:

private static final int REQUEST_LOCATION = 1;
LocationManager locationManager;
 double lattitude, longitude;





     locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
            buildAlertMessageNoGps();

        } else if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {




            if (ActivityCompat.checkSelfPermission(MyService.this, Manifest.permission.ACCESS_FINE_LOCATION)
                    != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission
                    (MyService.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

                ActivityCompat.requestPermissions((Activity)getApplicationContext(), new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION);

            } else {
                Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

                Location location1 = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

                Location location2 = locationManager.getLastKnownLocation(LocationManager. PASSIVE_PROVIDER);

                if (location != null) {
                    double latti = location.getLatitude();
                    double longi = location.getLongitude();
                    lattitude = latti;
                    longitude =longi;



                } else  if (location1 != null) {
                    double latti = location1.getLatitude();
                    double longi = location1.getLongitude();
                    lattitude = latti;
                    longitude =longi;



                } else  if (location2 != null) {
                    double latti = location2.getLatitude();
                    double longi = location2.getLongitude();
                    lattitude = latti;
                    longitude =longi;


                }else{

                    Log.d("Location", "Cant Get Location ");

                }
            }








        //}
    }

Answer 1

You are trying to get last known location. But are you sure that device has last known location? I think you have to request location.

Last known location is the location that device last obtained latitude and longitude.

For testing before calling your app first open internet goto map and then off the internet and open your app then you will get lastKnown location

So last know location is depend on previous location. If the device has no previous location you will not get any lastKnown location. So the location will be null.

So you have to request location. locationmanager.requestLocationUpdates() for more details you can visit here.