Fehlerkorrekturen und Erweiterungen

lib/main.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:dart_mq/dart_mq.dart';
+import 'package:synchronized/synchronized.dart';
 import 'package:flutter/material.dart';
 import 'package:geolocator/geolocator.dart';
 import 'package:isar/isar.dart';
@@ -100,10 +101,25 @@ class MyApp extends StatefulWidget {
 
   static late Isar isarInstance;
 
-  static Position? currentPosition;
+  static Position? _currentPosition;
+  static final Lock _positionLock = Lock();
 
   static bool suppressAcceptDialog = false;
 
+  /// Thread-safe getter for current position
+  static Future<Position?> getCurrentPosition() async {
+    return await _positionLock.synchronized(() {
+      return _currentPosition;
+    });
+  }
+
+  /// Thread-safe setter for current position
+  static Future<void> setCurrentPosition(Position? position) async {
+    await _positionLock.synchronized(() {
+      _currentPosition = position;
+    });
+  }
+
   @override
   State<MyApp> createState() => _MyAppState();
 }
@@ -138,8 +154,8 @@ class _MyAppState extends State<MyApp> with ConsumerMixin {
         distanceFilter: 0,
       );
 
-      Geolocator.getPositionStream(locationSettings: locationSettings).listen((Position? position) {
-        MyApp.currentPosition = position;
+      Geolocator.getPositionStream(locationSettings: locationSettings).listen((Position? position) async {
+        await MyApp.setCurrentPosition(position);
       });
     }
   }