Flutter中实现中国省份地图
在Flutter中,你可以使用flutter_map
和flutter_map_marker_cluster
包来实现中国省份地图。以下是一个简单的例子:
首先,在你的pubspec.yaml
文件中添加依赖:
dependencies:
flutter:
sdk: flutter
flutter_map: ^0.10.2
geojson_vi: ^0.3.0
然后,获取中国省份的GeoJSON数据。你可以从国家统计局或其他可信源获取GeoJSON格式的中国省份边界数据。
接下来,你可以创建一个StatefulWidget
来加载GeoJSON数据,并显示在地图上:
import 'package:flutter/material.dart';
import 'package:flutter_map/flutter_map.dart';
import 'package:flutter_map_marker_cluster/flutter_map_marker_cluster.dart';
import 'package:geojson_vi/geojson_vi.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: ProvinceMap(),
);
}
}
class ProvinceMap extends StatefulWidget {
@override
_ProvinceMapState createState() => _ProvinceMapState();
}
class _ProvinceMapState extends State<ProvinceMap> {
final double _zoom = 4.5;
final double _latitude = 31.5;
final double _longitude = 105;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('中国省份地图'),
),
body: FlutterMap(
options: MapOptions(
center: LatLng(_latitude, _longitude),
zoom: _zoom,
plugins: [
MarkerClusterPlugin(),
],
),
layers: [
TileLayerOptions(
urlTemplate: 'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
subdomains: ['a', 'b', 'c'],
),
GeoJsonClusterLayerOptions(
geoJson: GeoJson(
// 替换为你的省份GeoJSON数据
geoJson: {},
// 这里可以自定义样式
markerOptions: {
'clusterMarkerBuilder': (Cluster cluster) => ClusterMarker(
width: 80.0,
height: 80.0,
markerAnchor: 'center',
markerBuilder: (context) => Text('${cluster.count}'),
),
'markerBuilder': (location) => Marker(
width: 50.0,
height: 50.0,
point: location,
builder: (context) => Icon(Icons.location_on),
),
},
),
// 是否在地图缩放时更新集群
updateClustersOnZoom: true,
// 是否在地图拖动时更新集群
updateClustersOnMove: true,
),
],
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