来自JSON文件的Flutter Google地图标记

import 'dart:convert';
import 'package:flutter/services.dart' show rootBundle;
import 'package:google_maps_flutter/google_maps_flutter.dart';

Future<List<Marker>> getMarkersFromJson() async {
  String jsonString = await rootBundle.loadString('assets/markers.json');
  List<dynamic> jsonList = json.decode(jsonString);
  
  List<Marker> markers = [];
  
  for (var json in jsonList) {
    double lat = json['lat'];
    double lng = json['lng'];
    String title = json['title'];
    String description = json['description'];
    
    Marker marker = Marker(
      markerId: MarkerId(title),
      position: LatLng(lat, lng),
      infoWindow: InfoWindow(
        title: title,
        snippet: description,
      ),
    );
    
    markers.add(marker);
  }
  
  return markers;
}

GoogleMap(
  markers: Set<Marker>.of(await getMarkersFromJson()),
  // 其他属性...
)