在Flutter中浏览传单地图时，标记和地图会重建每一帧

如何解决在Flutter中浏览传单地图时，标记和地图会重建每一帧

在地图上滑动或移动时，即使没有配置发生变化，地图也会随着每一帧进行重建。 Marker子小部件也是如此，在我看来，这将是非常昂贵的。

这是一个简单的代码段，大部分来自pub.dev

的Flutter_map示例中的c / p

这是我没有得到的错误还是功能？ ：D

感谢您的帮助...

import 'package:Flutter/material.dart';
import 'package:Flutter_map/Flutter_map.dart';
import 'package:latlong/latlong.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',theme: ThemeData(
        primarySwatch: Colors.blue,visualDensity: VisualDensity.adaptivePlatformDensity,),home: MyHomePage(title: 'Flutter Demo Home Page'),);
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key,this.title}) : super(key: key);
  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text(widget.title),body: LeafletMap());
  }
}

class LeafletMap extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    print("LeafletMap.build()");
    return FlutterMap(
      options: MapOptions(
        center: LatLng(51.5,-0.09),zoom: 13.0,layers: [
        TileLayerOptions(
            urlTemplate: "https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png",subdomains: ['a','b','c']),MarkerLayerOptions(
          markers: [
            Marker(
                width: 80.0,height: 80.0,point: new LatLng(51.5,builder: (ctx) => MyWidget()),],);
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    print("MyWidget.build()");
    return Flutterlogo();
  }
}