Finding the latitude and longitude values for the device's current location in Android with Google Maps API

So there are many similar questions asked based on this, and I have also got a working solution. However, this seems to only work on my physical Android device. If I were to use it with the emulator, the method returns a null value and I don't know why. Many sources mention that there is a better alternative to the code that I am currently using but they don't mention what/how exactly. This is the code that I am using to get the current location of my device:

@SuppressWarnings("MissingPermission")
    private LatLng getCurrentLocation() {
        LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
        String locationProvider = LocationManager.NETWORK_PROVIDER;
        assert locationManager != null;
        android.location.Location lastKnownLocation = locationManager.getLastKnownLocation(locationProvider);
        return new LatLng(lastKnownLocation.getLatitude(), lastKnownLocation.getLongitude());
    }

I also don't like the fact that I have to suppress warnings. Sources that I have looked at include:

https://developer.android.com/training/location/retrieve-current.html#java

https://stackoverflow.com/questions/3145089/what-is-the-simplest-and-most-robust-way-to-get-the-users-current-location-on-a/3145655#3145655

The first one doesn't work, I get a null value. The second one looks overly complicated for a simple result that I am seeking.

This code works just fine in one of my projects:

public class LocationManager {
private static LocationManager requestManager;
private FusedLocationProviderClient mLocationProviderClient;
private Location mLocation;
private Location mMyCurrentLocation;
private locationSuccessListener mListener;
public Location getLocation() {
return mLocation;
}
public void setLocation(Location location) {
mLocation = location;
}
private LocationManager(FusedLocationProviderClient fusedLocationProviderClient) {
this.mLocationProviderClient = fusedLocationProviderClient;
}
public static LocationManager createInstance(FusedLocationProviderClient fusedLocationProviderClient) {
if (requestManager != null) {
return requestManager;
} else {
return requestManager = new LocationManager(fusedLocationProviderClient);
}
}
public static LocationManager getInstance() {
return requestManager;
}
public void setLocation(Activity activity) {
mListener = (locationSuccessListener) activity;
LocationCallback callback = new LocationCallback();
LocationRequest locationRequest = new LocationRequest();
Task<Void> r = mLocationProviderClient.requestLocationUpdates(locationRequest, callback, Looper.getMainLooper());
r.addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
mLocationProviderClient.getLastLocation().addOnSuccessListener(activity, new OnSuccessListener<Location>() {
@Override
public void onSuccess(Location location) {
mMyCurrentLocation = location;
mLocation = location;
if (location != null) {
mListener.onLocationReceived();
mLocationProviderClient.removeLocationUpdates(callback);
}
}
});
}
});
}
public Location getMyCurrentLocation() {
return mMyCurrentLocation;
}
public interface locationSuccessListener {
void onLocationReceived();
}

You need to do something like that:

public class PlacesActivity extends SingleFragmentActivity implements NavigationView.OnNavigationItemSelectedListener, LocationManager.locationSuccessListener

and then in your activity you will get this:

@Override
public void onLocationReceived() {
Location l = LocationManager.getInstance().getMyCurrentLocation();
if (l==null){
Toast.makeText(this, "unable to get location", Toast.LENGTH_SHORT).show();
}
}

to get permission you suppose to do something like this:

if (ContextCompat.checkSelfPermission(Objects.requireNonNull(getActivity()), Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(getActivity(),
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
0);