public class MotoristaMapsActivity extends FragmentActivity implements OnMapReadyCallback, LocationListener, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener {
    private Marker currentLocationMarker;
    private LatLng currentLocationLatLong;
    FusedLocationProviderClient mFusedLocationClient;
   // LocationCallback nLocationCallback;
   // LocationResult nLocationResult;

    @Override
    public void onLocationChanged(Location location) {
        nLastLocation = location;
        LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
        mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
        mMap.animateCamera(CameraUpdateFactory.zoomTo(11));

        if (currentLocationMarker != null) {

        }


        currentLocationLatLong = new LatLng(location.getLatitude(), location.getLongitude());
        MarkerOptions markerOptions = new MarkerOptions();
        markerOptions.position(currentLocationLatLong);
        markerOptions.title("localização atual");
        markerOptions.icon(defaultMarker(HUE_BLUE));


    }


    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_motorista_maps);
        //startLocationUpdates();
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
        //
        mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
    }

    public void onConnected(@Nullable Bundle bundle) {
        startLocationUpdates();
    }

    protected void startLocationUpdates() {
        nLocationRequest = new LocationRequest();
        nLocationRequest.setInterval(1000 * 10);
        nLocationRequest.setFastestInterval(2000);
        nLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

        // new Google API SDK v11 uses getFusedLocationProviderClient(this)
        //  LocationServices.getFusedLocationProviderClient(this).requestLocationUpdates(nLocationRequest, nlocationCallback, null);
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {

            mMap.setMyLocationEnabled(true);
        } else {
            return;
        }

        /*
        nLocationCallback = new LocationCallback();
        nLocationCallback.onLocationResult(nLocationResult.getLastLocation());
        mFusedLocationClient.requestLocationUpdates(nLocationRequest, nLocationCallback, Looper.myLooper()); */

       mFusedLocationClient.requestLocationUpdates(nLocationRequest, new LocationCallback() {
                    @Override
                    public void onLocationResult(LocationResult locationResult) {
                        // do work here
                        onLocationChanged(locationResult.getLastLocation());
                    }
                },
                Looper.myLooper());

    }


    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

    }

    private GoogleMap mMap;
    GoogleApiClient nGoogleApiClient;
    Location nLastLocation;
    LocationRequest nLocationRequest;
    private LocationCallback nlocationCallback;





    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        //camera
        CameraPosition cameraPosition = new CameraPosition.Builder().zoom(11).target(currentLocationLatLong).build();
        mMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
       // mMap.setMyLocationEnabled(true);
        //
        }

    public void setCurrentLocationMarker(Marker currentLocationMarker) {
        this.currentLocationMarker = currentLocationMarker;
    }
}
 

mFusedLocationClient.requestLocationUpdates(nLocationRequest, new LocationCallback() {
                    @Override
                    public void onLocationResult(LocationResult locationResult) {
                        // do work here
                        onLocationChanged(locationResult.getLastLocation());
                    }
                },
                Looper.myLooper());

    }