Error starting activity GoogleMaps

I have an error when starting my activity where googlemaps is

  

FATAL EXCEPTION: main Process: com.appmovilperote, PID: 9854   java.lang.RuntimeException: Unable to start activity   ComponentInfo {com.appmovilperote / com.appmovilperote.GoogleMaps.MapsActivity}:   java.lang.NullPointerException: Attempt to invoke virtual method   'double android.location.Location.getLatitude ()' on a null object   reference at   android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2426)     at   android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2490)     at android.app.ActivityThread.access $ 900 (ActivityThread.java:154)     at   android.app.ActivityThread $ H.handleMessage (ActivityThread.java:1354)     at android.os.Handler.dispatchMessage (Handler.java:102) at   android.os.Looper.loop (Looper.java:148) at   android.app.ActivityThread.main (ActivityThread.java:5443) at   java.lang.reflect.Method.invoke (Native Method) at   com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:728)     at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:618)   Caused by: java.lang.NullPointerException: Attempt to invoke virtual   method 'double android.location.Location.getLatitude ()' on a null   object reference at   com.appmovilperote.GoogleMaps.MapsActivity.onCreate (MapsActivity.java:90)     at android.app.Activity.performCreate (Activity.java:6259) at   android.app.Instrumentation.callActivityOnCreate (Instrumentation.java:1130)     at   android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2379)     ... 9 more

MapsActivity.java

public class MapsActivity extends AppCompatActivity implements OnMapReadyCallback, DirectionFinderListener {

    private GoogleMap mMap;
    private List<Marker> originMarkers = new ArrayList<>();
    private List<Marker> destinationMarkers = new ArrayList<>();
    private List<Polyline> polylinePaths = new ArrayList<>();
    private ProgressDialog progressDialog;
    private ImageView imvruta;

    public static String nombre;
    public static double lat, lng;
    public static LatLng destin;
    public static LatLng orign;
    double  latitude;
    double longitud;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);
        // 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);




        Bundle extras = getIntent().getExtras();
        lat = extras.getDouble("LATITUD");
        lng = extras.getDouble("LONGITUD");
        nombre = extras.getString("NOMBRENEGOCIO");

        destin = new LatLng(lat, lng);

        imvruta = (ImageView)findViewById(R.id.imv_type_ruta);

        LocationManager locationManager = (LocationManager)
                getSystemService(Context.LOCATION_SERVICE);
        Criteria criteria = new Criteria();

        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return;
        }

        //A API 17
        Location location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, false));
        latitude = location.getLatitude();
        longitud = location.getLongitude();

        orign = new LatLng(latitude,longitud);

    }
    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;

        CameraPosition cameraPosition = CameraPosition.builder()
                .zoom(17).target(destin).build();

        mMap.addMarker(new MarkerOptions().position(destin).title(nombre)).showInfoWindow();
        mMap.moveCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));

        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return;
        }
        mMap.setMyLocationEnabled(true);

    }
}

I get an error when I get the longitude and latitude

 latitude = location.getLatitude();
 longitud = location.getLongitude();

What am I doing wrong?