initial
This commit is contained in:
spasolreisa
248
lib/pages/map_page.dart
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248
lib/pages/map_page.dart
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import 'package:flutter/material.dart';
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import 'package:flutter_map/flutter_map.dart';
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import 'package:latlong2/latlong.dart';
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import 'package:geolocator/geolocator.dart';
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import 'package:geocoding/geocoding.dart';
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class MapPage extends StatefulWidget {
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const MapPage({super.key});
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@override
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State<MapPage> createState() => _MapPageState();
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}
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class _MapPageState extends State<MapPage> {
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// 默认中心点（北京）
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LatLng _currentPosition = const LatLng(39.9042, 116.4074);
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String _address = "正在加载地址...";
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bool _isLoading = false;
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// 地图控制器
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final MapController _mapController = MapController();
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@override
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void initState() {
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super.initState();
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_getCurrentLocation();
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}
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// 1. 获取当前位置并解析地址
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Future<void> _getCurrentLocation() async {
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setState(() {
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_isLoading = true;
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_address = "正在检查权限...";
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});
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try {
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// 1. 检查服务是否开启
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bool serviceEnabled = await Geolocator.isLocationServiceEnabled();
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if (!serviceEnabled) {
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setState(() {
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_address = "请在系统设置中开启‘定位服务’总开关";
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_isLoading = false;
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});
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return;
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}
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// 2. 检查权限
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LocationPermission permission = await Geolocator.checkPermission();
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// 如果权限被拒绝，尝试请求
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if (permission == LocationPermission.denied) {
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setState(() {
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_address = "正在请求权限...";
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});
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// 🔑 注意：macOS 上这行可能不会弹窗，而是直接返回 denied
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permission = await Geolocator.requestPermission();
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if (permission == LocationPermission.denied) {
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setState(() {
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_address = "权限被拒绝。请去【系统设置->隐私->定位】中手动开启本App权限。";
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_isLoading = false;
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});
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return;
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}
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}
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if (permission == LocationPermission.deniedForever) {
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setState(() {
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_address = "权限被永久拒绝，请在系统设置中手动开启。";
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_isLoading = false;
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});
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return;
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}
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// 3. 获取位置
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setState(() {
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_address = "正在获取坐标...";
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});
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// 🔑 添加超时限制，防止卡死
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Position position = await Geolocator.getCurrentPosition(
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desiredAccuracy: LocationAccuracy.high,
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timeLimit: const Duration(seconds: 15),
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).timeout(
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const Duration(seconds: 15),
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onTimeout: () {
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throw Exception("定位超时，请检查网络连接或移动到有信号的地方");
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},
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);
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LatLng newPos = LatLng(position.latitude, position.longitude);
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_mapController.move(newPos, 15.0);
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setState(() {
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_currentPosition = newPos;
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});
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await _getAddressFromLatLng(newPos);
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} catch (e) {
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debugPrint("定位错误详情: $e");
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setState(() {
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_address = "定位失败: ${e.toString()}";
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_isLoading = false;
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});
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}
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}
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// 2. 逆地理编码：经纬度 -> 文字地址
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Future<void> _getAddressFromLatLng(LatLng position) async {
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try {
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List<Placemark> placemarks = await placemarkFromCoordinates(
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position.latitude,
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position.longitude,
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);
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if (placemarks.isNotEmpty) {
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Placemark place = placemarks[0];
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setState(() {
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// 组合地址：省 + 市 + 区 + 街道
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_address = "${place.street ?? ""}, ${place.locality ?? ""}, ${place.administrativeArea ?? ""}";
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});
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}
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} catch (e) {
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setState(() {
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_address = "地址解析失败";
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});
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}
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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backgroundColor: Colors.transparent, // 保持透明，透出玻璃效果
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body: Stack(
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children: [
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// --- 底层：地图 ---
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// --- 底层：地图 ---
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FlutterMap(
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mapController: _mapController,
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options: MapOptions(
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initialCenter: _currentPosition,
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initialZoom: 13.0,
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// 🔑 添加交互标志，确保地图能响应鼠标拖拽
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interactionOptions: const InteractionOptions(
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flags: InteractiveFlag.all,
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),
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),
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children: [
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TileLayer(
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// ✅ 替换为 CartoDB 浅色主题（速度快，无需Key）
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urlTemplate: 'https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}{r}.png',
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subdomains: ['a', 'b', 'c', 'd'],
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userAgentPackageName: 'com.example.app',
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// 🔑 添加错误监听，看看是不是还有网络问题
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errorTileCallback: (tile, error, stackTrace) {
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debugPrint('地图瓦片加载错误: $error');
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},
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),
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MarkerLayer(
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markers: [
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Marker(
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width: 80.0,
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height: 80.0,
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point: _currentPosition,
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child: const Icon(
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Icons.location_pin,
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color: Colors.red,
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size: 40,
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),
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),
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],
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),
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],
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),
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// --- 顶层：UI 控件 ---
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// 1. 顶部地址卡片 (玻璃风格)
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Positioned(
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top: 50,
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left: 20,
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right: 20,
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child: Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Colors.white.withOpacity(0.85), // 半透明白
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borderRadius: BorderRadius.circular(16),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.1),
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blurRadius: 10,
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offset: const Offset(0, 5),
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),
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],
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),
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child: Row(
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children: [
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const Icon(Icons.place, color: Colors.blueAccent),
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const SizedBox(width: 10),
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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"当前位置",
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style: TextStyle(fontSize: 12, color: Colors.grey),
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),
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const SizedBox(height: 4),
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Text(
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_address,
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style: const TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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color: Colors.black87,
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),
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maxLines: 2,
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overflow: TextOverflow.ellipsis,
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),
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],
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),
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),
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if (_isLoading)
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const SizedBox(
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width: 20,
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height: 20,
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child: CircularProgressIndicator(strokeWidth: 2),
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),
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],
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),
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),
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),
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// 2. 右下角定位按钮
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Positioned(
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bottom: 100, // 留出底部导航栏的空间
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right: 20,
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child: FloatingActionButton(
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onPressed: _getCurrentLocation,
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backgroundColor: Colors.white,
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child: const Icon(Icons.my_location, color: Colors.blue),
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),
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),
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],
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),
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);
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}
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}
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