错误：在Flutter中的此Consumer <Position>小部件上方找不到正确的Provider <Position>

Question

我在运行我的应用时遇到以下错误

错误：在此Consumer << Position>小部件上方找不到正确的Provider

我在这里附加了我的代码。

class MyApp extends StatelessWidget {
  final geoService = GeolocatorService();
  @override
  Widget build(BuildContext context) {
    return FutureProvider<dynamic>(
      create: (context) async => geoService.getInitialLocation(),
      child: MaterialApp(
        home: Consumer<Position>(
          builder: (context, position, widget) {
            return Maps(position);
          },
        ),
      ),
    );
  }
}

我的服务班级是...

class GeolocatorService {

  Stream getCurrentLocation() {
    return getPositionStream(
        distanceFilter: 10, desiredAccuracy: LocationAccuracy.high);
  }

  Future getInitialLocation() async {
    return getCurrentPosition(desiredAccuracy: LocationAccuracy.high);
  }
}

我发现的错误

错误：在此Consumer << Position>小部件

上方找不到正确的提供者