修改地图卡片

lib/modules/chat/controllers/chat_controller.dart

@@ -450,16 +450,15 @@ class ChatController extends GetxController {
     try {
       isPlay.value = false;
       if (audiourl.value != musicaudio['audiourl']) {
-        audiourl.value = musicaudio['audiourl'];
+        audiourl.value = '';
         await player.setUrl(musicaudio['audiourl']);
+        audiourl.value = musicaudio['audiourl'];
         player.play();
       } else {
         player.play();
       }
       isPlay.value = true;
     } catch (e) {
-      isPlay.value = false;
-      audiourl.value = '';
       Logger.error('加载异常: $e');
     }
   }

lib/modules/chat/views/chat_navigation_card.dart

@@ -0,0 +1,179 @@
+import 'dart:convert';
+import 'dart:math';
+import 'dart:math' as math;
+
+import 'package:flutter/material.dart';
+import 'package:http/http.dart' as http;
+
+class ChatNavigationCard extends StatefulWidget {
+  final Map? data;
+  final bool isDarkMode;
+
+  const ChatNavigationCard(this.data, this.isDarkMode, {super.key});
+
+  @override
+  State<ChatNavigationCard> createState() => _ChatNavigationCardState();
+}
+
+class _ChatNavigationCardState extends State<ChatNavigationCard> {
+  final String apiKey = '8bde023b7e5e00f321ea17929f10fbae';
+  LatLng startPoint = LatLng(116.397428, 39.90923); // 起点坐标
+  LatLng endPoint = LatLng(116.397026, 39.903303); // 终点坐标
+
+  @override
+  void initState() {
+    super.initState();
+    _getMapUrl();
+  }
+
+  Future<String> _getMapUrl() async {
+    // 1. 获取路径数据
+    final route = await _fetchRouteData();
+
+    // 2. 解析并简化路径
+    List<LatLng> simplified = _simplifyPath(route, epsilon: 0.0001);
+
+    // 3. 计算地图参数
+    final zoom = _calculateAutoZoom(simplified);
+
+    // 4. 生成静态地图URL
+    return _buildStaticMapUrl(simplified, zoom);
+  }
+
+  Future<List<LatLng>> _fetchRouteData() async {
+    final url = 'https://restapi.amap.com/v3/direction/driving?'
+        'origin=${startPoint.lng},${startPoint.lat}&'
+        'destination=${endPoint.lng},${endPoint.lat}&'
+        'key=$apiKey';
+
+    final response = await http.get(Uri.parse(url));
+    if (response.statusCode == 200) {
+      final data = json.decode(response.body);
+      return _parsePolyline(data['route']['paths'][0]['steps']);
+    }
+    throw Exception('Failed to load route');
+  }
+
+  List<LatLng> _parsePolyline(List<dynamic> steps) {
+    final List<LatLng> path = [];
+    for (final step in steps) {
+      final points = (step['polyline'] as String).split(';');
+      for (final point in points) {
+        final coords = point.split(',').map(double.parse).toList();
+        path.add(LatLng(coords[0], coords[1]));
+      }
+    }
+    return path;
+  }
+
+  List<LatLng> _simplifyPath(List<LatLng> points, {double epsilon = 0.0001}) {
+    return douglasPeucker(points, epsilon);
+  }
+
+  int _calculateAutoZoom(List<LatLng> points,
+      {int mapWidth = 1024, int mapHeight = 512}) {
+    if (points.isEmpty) return 15; // 默认缩放级别
+
+    // 1. 计算坐标范围
+    double minLng = double.infinity;
+    double maxLng = -double.infinity;
+    double minLat = double.infinity;
+    double maxLat = -double.infinity;
+
+    for (final p in points) {
+      final lng = p.lng;
+      final lat = p.lat;
+
+      minLng = math.min(minLng, lng);
+      maxLng = math.max(maxLng, lng);
+      minLat = math.min(minLat, lat);
+      maxLat = math.max(maxLat, lat);
+    }
+
+    // 3. 计算缩放级别（基于Leaflet算法改进）
+    const worldWidth = 256; // 高德瓦片尺寸
+    const worldHeight = 256;
+    const zoomMax = 18; // 高德最大缩放级别
+
+    double latRad(double lat) {
+      final sin = math.sin(lat * math.pi / 180);
+      return math.log((1 + sin) / (1 - sin)) / 2;
+    }
+
+    final latFraction = (latRad(maxLat) - latRad(minLat)) / math.pi;
+    final lngDiff = maxLng - minLng;
+    final lngFraction = ((lngDiff < 0) ? (lngDiff + 360) : lngDiff) / 360;
+
+    final latZoom =
+        math.log((mapHeight / worldHeight) / latFraction) / math.ln2;
+    final lngZoom = math.log((mapWidth / worldWidth) / lngFraction) / math.ln2;
+
+    return math.min(math.min(latZoom, lngZoom).floor(), zoomMax);
+  }
+
+  String _buildStaticMapUrl(List<LatLng> path, int zoom) {
+    final pathParam = path.map((p) => '${p.lng},${p.lat}').join(';');
+    return 'https://restapi.amap.com/v3/staticmap?'
+        'zoom=$zoom&'
+        'size=1024*512&'
+        'paths=10,0x0000ff,1,,:$pathParam&'
+        'markers=mid,,A:${startPoint.lng},${startPoint.lat}|'
+        'mid,,B:${endPoint.lng},${endPoint.lat}&'
+        'key=$apiKey';
+  }
+
+  List<LatLng> douglasPeucker(List<LatLng> points, double epsilon) {
+    if (points.length < 3) return points;
+
+    double maxDistance = 0;
+    int index = 0;
+
+    for (int i = 1; i < points.length - 1; i++) {
+      double d = _perpendicularDistance(points[i], points.first, points.last);
+      if (d > maxDistance) {
+        index = i;
+        maxDistance = d;
+      }
+    }
+
+    if (maxDistance > epsilon) {
+      return [
+        ...douglasPeucker(points.sublist(0, index + 1), epsilon),
+        ...douglasPeucker(points.sublist(index), epsilon).skip(1)
+      ];
+    }
+    return [points.first, points.last];
+  }
+
+  double _perpendicularDistance(LatLng point, LatLng start, LatLng end) {
+    final area = (end.lng - start.lng) * (point.lat - start.lat) -
+        (end.lat - start.lat) * (point.lng - start.lng);
+    final length =
+        sqrt(pow(end.lng - start.lng, 2) + pow(end.lat - start.lat, 2));
+    return area.abs() / length;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        FutureBuilder(
+          future: _getMapUrl(),
+          builder: (BuildContext context, AsyncSnapshot snapshot) {
+            if (snapshot.hasData) {
+              return Image.network(snapshot.data);
+            }
+            return const CircularProgressIndicator();
+          },
+        ),
+      ],
+    );
+  }
+}
+
+class LatLng {
+  final double lat;
+  final double lng;
+
+  LatLng(this.lng, this.lat); // 高德使用经度在前纬度在后的格式
+}

lib/modules/chat/views/chat_view.dart

@@ -6,6 +6,7 @@ import '../controllers/chat_controller.dart';
 import '../models/message_model.dart';
 import '../../../core/theme/app_colors.dart';
 import 'chat_music_card.dart';
+import 'chat_navigation_card.dart';
 
 class ChatView extends GetView<ChatController> {
   const ChatView({Key? key}) : super(key: key);
@@ -354,8 +355,11 @@ class ChatView extends GetView<ChatController> {
       );
     }
     if (message.data != null) {
+      // if (message.data?['musicaudio'] != null) {
+      //   box = ChatMusicCard(message.data, isDarkMode);
+      // }
       if (message.data?['musicaudio'] != null) {
-        box = ChatMusicCard(message.data, isDarkMode);
+        box = ChatNavigationCard(message.data, isDarkMode);
       }
     }
     return box;