app/lib/my_tools/providers.dart

import 'package:amap_flutter_base/amap_flutter_base.dart';
import 'package:flutter/foundation.dart';

class MyLocationProvider with ChangeNotifier, DiagnosticableTreeMixin {
  LatLng _myLatLng;

  LatLng get myLatLng => _myLatLng;

  void getLocation(double lat,double lng) {
    _myLatLng = LatLng(lat, lng);
    notifyListeners();
  }

  @override
  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
    super.debugFillProperties(properties);
  }
}