Maps Sample V2 - add onAddmarkerButtonPressed() pt 2 - track camera position

main.dart

LatLng _lastMapPosition = _center;

void _onCameraMove(CameraPosition position) {
  _lastMapPosition = position.target;
}

@override
Widget build(BuildContext context) {
  return MaterialApp(
    ...
    GoogleMap(
      ...
      onCameraMove: _onCameraMove,
    ),
  );
}