feat: add the function to hide records that are only valid for time.

android/app/src/main/AndroidManifest.xml

@@ -1,4 +1,5 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
     <uses-permission android:name="android.permission.BLUETOOTH"/>
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
     <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" android:usesPermissionFlags="neverForLocation"/>
@@ -14,10 +15,11 @@
     <uses-permission android:name="android.permission.WAKE_LOCK"/>
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC"/>
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_CONNECTED_DEVICE"/>
     
     <uses-feature android:name="android.hardware.bluetooth_le" android:required="true"/>
     <application
-        android:label="lbjconsole"
+        android:label="LBJ Console"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
         <activity
@@ -47,6 +49,15 @@
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
+            
+        <!-- 前台服务配置 -->
+        <service
+            android:name="id.flutter.flutter_background_service.BackgroundService"
+            android:foregroundServiceType="connectedDevice|dataSync"
+            android:exported="false"
+            android:stopWithTask="false"
+            android:enabled="true"
+            tools:replace="android:exported"/>
     </application>
     <!-- Required to query activities that can process text, see:
          https://developer.android.com/training/package-visibility and

ios/Runner/Info.plist

@@ -5,7 +5,7 @@
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleDisplayName</key>
-	<string>Lbjconsole</string>
+	<string>LBJ Console</string>
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIdentifier</key>
@@ -13,7 +13,7 @@
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleName</key>
-	<string>lbjconsole</string>
+	<string>LBJ Console</string>
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>

lib/main.dart

@@ -1,14 +1,20 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 import 'package:lbjconsole/screens/main_screen.dart';
 import 'package:lbjconsole/util/train_type_util.dart';
 import 'package:lbjconsole/util/loco_info_util.dart';
 import 'package:lbjconsole/util/loco_type_util.dart';
 import 'package:lbjconsole/services/loco_type_service.dart';
 import 'package:lbjconsole/services/database_service.dart';
+import 'package:lbjconsole/services/background_service.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
 
+  await _initializeNotifications();
+  
+  await BackgroundService.initialize();
+
   await Future.wait([
     TrainTypeUtil.initialize(),
     LocoInfoUtil.initialize(),
@@ -18,6 +24,19 @@ void main() async {
   runApp(const LBJReceiverApp());
 }
 
+Future<void> _initializeNotifications() async {
+  final flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
+  
+  const AndroidInitializationSettings initializationSettingsAndroid =
+      AndroidInitializationSettings('@mipmap/ic_launcher');
+      
+  const InitializationSettings initializationSettings = InitializationSettings(
+    android: initializationSettingsAndroid,
+  );
+  
+  await flutterLocalNotificationsPlugin.initialize(initializationSettings);
+}
+
 class LBJReceiverApp extends StatelessWidget {
   const LBJReceiverApp({super.key});
 

lib/models/map_state.dart

@@ -0,0 +1,65 @@
+class MapState {
+  final double zoom;
+  final double centerLat;
+  final double centerLng;
+  final double bearing;
+
+  MapState({
+    required this.zoom,
+    required this.centerLat,
+    required this.centerLng,
+    required this.bearing,
+  });
+
+  Map<String, dynamic> toJson() {
+    return {
+      'zoom': zoom,
+      'centerLat': centerLat,
+      'centerLng': centerLng,
+      'bearing': bearing,
+    };
+  }
+
+  factory MapState.fromJson(Map<String, dynamic> json) {
+    return MapState(
+      zoom: json['zoom']?.toDouble() ?? 10.0,
+      centerLat: json['centerLat']?.toDouble() ?? 39.9042,
+      centerLng: json['centerLng']?.toDouble() ?? 116.4074,
+      bearing: json['bearing']?.toDouble() ?? 0.0,
+    );
+  }
+
+  MapState copyWith({
+    double? zoom,
+    double? centerLat,
+    double? centerLng,
+    double? bearing,
+  }) {
+    return MapState(
+      zoom: zoom ?? this.zoom,
+      centerLat: centerLat ?? this.centerLat,
+      centerLng: centerLng ?? this.centerLng,
+      bearing: bearing ?? this.bearing,
+    );
+  }
+
+  @override
+  String toString() {
+    return 'MapState(zoom: ' + zoom.toString() + ', centerLat: ' + centerLat.toString() + ', centerLng: ' + centerLng.toString() + ', bearing: ' + bearing.toString() + ')';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    return other is MapState &&
+        other.zoom == zoom &&
+        other.centerLat == centerLat &&
+        other.centerLng == centerLng &&
+        other.bearing == bearing;
+  }
+
+  @override
+  int get hashCode {
+    return zoom.hashCode ^ centerLat.hashCode ^ centerLng.hashCode ^ bearing.hashCode;
+  }
+}

lib/models/train_record.dart

@@ -149,7 +149,7 @@ class TrainRecord {
     final lbjClassValue = lbjClass.trim();
     final trainValue = train.trim();
 
-    if (trainValue == "<NUL>") {
+    if (trainValue == "<NUL>" || trainValue.contains("-----")) {
       return "";
     }
 

lib/screens/main_screen.dart

@@ -10,8 +10,161 @@ import 'package:lbjconsole/screens/settings_screen.dart';
 import 'package:lbjconsole/services/ble_service.dart';
 import 'package:lbjconsole/services/database_service.dart';
 import 'package:lbjconsole/services/notification_service.dart';
+import 'package:lbjconsole/services/background_service.dart';
 import 'package:lbjconsole/themes/app_theme.dart';
 
+class _ConnectionStatusWidget extends StatefulWidget {
+  final BLEService bleService;
+  final DateTime? lastReceivedTime;
+
+  const _ConnectionStatusWidget({
+    required this.bleService,
+    required this.lastReceivedTime,
+  });
+
+  @override
+  State<_ConnectionStatusWidget> createState() =>
+      _ConnectionStatusWidgetState();
+}
+
+class _ConnectionStatusWidgetState extends State<_ConnectionStatusWidget> {
+  StreamSubscription? _connectionSubscription;
+  String _deviceStatus = "未连接";
+  bool _isConnected = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _connectionSubscription =
+        widget.bleService.connectionStream.listen((connected) {
+      if (mounted) {
+        setState(() {
+          _isConnected = connected;
+          _deviceStatus = connected ? "已连接" : "未连接";
+        });
+      }
+    });
+    _isConnected = widget.bleService.isConnected;
+    _deviceStatus = widget.bleService.deviceStatus;
+  }
+
+  @override
+  void dispose() {
+    _connectionSubscription?.cancel();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      children: [
+        Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            if (widget.lastReceivedTime == null || !_isConnected) ...[
+              Text(_deviceStatus,
+                  style: const TextStyle(color: Colors.white70, fontSize: 12)),
+            ],
+            _LastReceivedTimeWidget(
+              lastReceivedTime: widget.lastReceivedTime,
+              isConnected: _isConnected,
+            ),
+          ],
+        ),
+        const SizedBox(width: 8),
+        Container(
+          width: 8,
+          height: 8,
+          decoration: BoxDecoration(
+            color: _isConnected ? Colors.green : Colors.red,
+            shape: BoxShape.circle,
+          ),
+        ),
+      ],
+    );
+  }
+}
+
+class _LastReceivedTimeWidget extends StatefulWidget {
+  final DateTime? lastReceivedTime;
+  final bool isConnected;
+
+  const _LastReceivedTimeWidget({
+    required this.lastReceivedTime,
+    required this.isConnected,
+  });
+
+  @override
+  State<_LastReceivedTimeWidget> createState() =>
+      _LastReceivedTimeWidgetState();
+}
+
+class _LastReceivedTimeWidgetState extends State<_LastReceivedTimeWidget> {
+  Timer? _timer;
+
+  @override
+  void initState() {
+    super.initState();
+    _startTimer();
+  }
+
+  @override
+  void didUpdateWidget(_LastReceivedTimeWidget oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.lastReceivedTime != widget.lastReceivedTime ||
+        oldWidget.isConnected != widget.isConnected) {
+      _startTimer();
+    }
+  }
+
+  void _startTimer() {
+    _timer?.cancel();
+    if (widget.lastReceivedTime != null && widget.isConnected) {
+      _timer = Timer.periodic(const Duration(seconds: 1), (timer) {
+        if (mounted) {
+          setState(() {});
+        }
+      });
+    }
+  }
+
+  String _formatTime() {
+    if (widget.lastReceivedTime == null) return '';
+
+    final now = DateTime.now();
+    final difference = now.difference(widget.lastReceivedTime!);
+
+    if (difference.inDays > 0) {
+      return '${difference.inDays}天前';
+    } else if (difference.inHours > 0) {
+      return '${difference.inHours}小时前';
+    } else if (difference.inMinutes > 0) {
+      return '${difference.inMinutes}分钟前';
+    } else {
+      return '${difference.inSeconds}秒前';
+    }
+  }
+
+  @override
+  void dispose() {
+    _timer?.cancel();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (widget.lastReceivedTime == null || !widget.isConnected) {
+      return const SizedBox.shrink();
+    }
+
+    return Text(
+      _formatTime(),
+      style: const TextStyle(color: Colors.white70, fontSize: 12),
+    );
+  }
+}
+
 class MainScreen extends StatefulWidget {
   const MainScreen({super.key});
 
@@ -27,7 +180,8 @@ class _MainScreenState extends State<MainScreen> with WidgetsBindingObserver {
 
   StreamSubscription? _connectionSubscription;
   StreamSubscription? _dataSubscription;
-
+  StreamSubscription? _lastReceivedTimeSubscription;
+  DateTime? _lastReceivedTime;
   bool _isHistoryEditMode = false;
   final GlobalKey<HistoryScreenState> _historyScreenKey =
       GlobalKey<HistoryScreenState>();
@@ -39,12 +193,36 @@ class _MainScreenState extends State<MainScreen> with WidgetsBindingObserver {
     _bleService = BLEService();
     _bleService.initialize();
     _initializeServices();
+    _checkAndStartBackgroundService();
+    _setupLastReceivedTimeListener();
+  }
+
+  Future<void> _checkAndStartBackgroundService() async {
+    final settings = await DatabaseService.instance.getAllSettings() ?? {};
+    final backgroundServiceEnabled =
+        (settings['backgroundServiceEnabled'] ?? 0) == 1;
+
+    if (backgroundServiceEnabled) {
+      await BackgroundService.startService();
+    }
+  }
+
+  void _setupLastReceivedTimeListener() {
+    _lastReceivedTimeSubscription =
+        _bleService.lastReceivedTimeStream.listen((time) {
+      if (mounted) {
+        setState(() {
+          _lastReceivedTime = time;
+        });
+      }
+    });
   }
 
   @override
   void dispose() {
     _connectionSubscription?.cancel();
     _dataSubscription?.cancel();
+    _lastReceivedTimeSubscription?.cancel();
     WidgetsBinding.instance.removeObserver(this);
     super.dispose();
   }
@@ -59,14 +237,10 @@ class _MainScreenState extends State<MainScreen> with WidgetsBindingObserver {
   Future<void> _initializeServices() async {
     await _notificationService.initialize();
 
-    _connectionSubscription = _bleService.connectionStream.listen((_) {
-      if (mounted) setState(() {});
-    });
-
     _dataSubscription = _bleService.dataStream.listen((record) {
       _notificationService.showTrainNotification(record);
       if (_historyScreenKey.currentState != null) {
-        _historyScreenKey.currentState!.loadRecords(scrollToTop: true);
+        _historyScreenKey.currentState!.addNewRecord(record);
       }
     });
   }
@@ -122,17 +296,10 @@ class _MainScreenState extends State<MainScreen> with WidgetsBindingObserver {
       actions: [
         Row(
           children: [
-            Container(
+            _ConnectionStatusWidget(
-              width: 8,
+              bleService: _bleService,
-              height: 8,
+              lastReceivedTime: _lastReceivedTime,
-              decoration: BoxDecoration(
-                color: _bleService.isConnected ? Colors.green : Colors.red,
-                shape: BoxShape.circle,
-              ),
             ),
-            const SizedBox(width: 8),
-            Text(_bleService.deviceStatus,
-                style: const TextStyle(color: Colors.white70)),
             IconButton(
               icon: const Icon(Icons.bluetooth, color: Colors.white),
               onPressed: _showConnectionDialog,
@@ -230,7 +397,7 @@ class _MainScreenState extends State<MainScreen> with WidgetsBindingObserver {
         selectedIndex: _currentIndex,
         onDestinationSelected: (index) {
           if (_currentIndex == 2 && index == 0) {
-            _historyScreenKey.currentState?.loadRecords();
+            _historyScreenKey.currentState?.reloadRecords();
           }
           setState(() {
             if (_isHistoryEditMode) _isHistoryEditMode = false;
@@ -263,6 +430,8 @@ class _PixelPerfectBluetoothDialogState
   List<BluetoothDevice> _devices = [];
   _ScanState _scanState = _ScanState.initial;
   StreamSubscription? _connectionSubscription;
+  StreamSubscription? _lastReceivedTimeSubscription;
+  DateTime? _lastReceivedTime;
   @override
   void initState() {
     super.initState();
@@ -277,6 +446,7 @@ class _PixelPerfectBluetoothDialogState
   @override
   void dispose() {
     _connectionSubscription?.cancel();
+    _lastReceivedTimeSubscription?.cancel();
     super.dispose();
   }
 
@@ -306,6 +476,17 @@ class _PixelPerfectBluetoothDialogState
     await widget.bleService.disconnect();
   }
 
+  void _setupLastReceivedTimeListener() {
+    _lastReceivedTimeSubscription =
+        widget.bleService.lastReceivedTimeStream.listen((timestamp) {
+      if (mounted) {
+        setState(() {
+          _lastReceivedTime = timestamp;
+        });
+      }
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
     final isConnected = widget.bleService.isConnected;
@@ -342,6 +523,13 @@ class _PixelPerfectBluetoothDialogState
       Text(device?.remoteId.str ?? '',
           style: Theme.of(context).textTheme.bodySmall,
           textAlign: TextAlign.center),
+      if (_lastReceivedTime != null) ...[
+        const SizedBox(height: 8),
+        _LastReceivedTimeWidget(
+          lastReceivedTime: _lastReceivedTime,
+          isConnected: widget.bleService.isConnected,
+        ),
+      ],
       const SizedBox(height: 16),
       ElevatedButton.icon(
           onPressed: _disconnect,

lib/screens/map_screen.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter_map/flutter_map.dart';
 import 'package:latlong2/latlong.dart';
@@ -26,8 +27,8 @@ class _MapScreenState extends State<MapScreen> {
   bool _isMapInitialized = false;
   bool _isFollowingLocation = false;
   bool _isLocationPermissionGranted = false;
+  Timer? _locationTimer;
 
-  static const LatLng _defaultPosition = LatLng(39.9042, 116.4074);
 
   @override
   void initState() {
@@ -35,12 +36,13 @@ class _MapScreenState extends State<MapScreen> {
     _initializeMap();
     _loadTrainRecords();
     _loadSettings();
-    _requestLocationPermission();
+    _startLocationUpdates();
   }
 
   @override
   void dispose() {
     _saveSettings();
+    _locationTimer?.cancel();
     super.dispose();
   }
 
@@ -49,6 +51,9 @@ class _MapScreenState extends State<MapScreen> {
   Future<void> _requestLocationPermission() async {
     bool serviceEnabled = await Geolocator.isLocationServiceEnabled();
     if (!serviceEnabled) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('请开启定位服务')),
+      );
       return;
     }
 
@@ -58,6 +63,9 @@ class _MapScreenState extends State<MapScreen> {
     }
 
     if (permission == LocationPermission.deniedForever) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('定位权限被拒绝，请在设置中开启')),
+      );
       return;
     }
 
@@ -78,12 +86,39 @@ class _MapScreenState extends State<MapScreen> {
         _userLocation = LatLng(position.latitude, position.longitude);
       });
 
-      if (!_isMapInitialized && _userLocation != null) {
+    } catch (e) {
-        _mapController.move(_userLocation!, _currentZoom);
+    }
-      }
-    } catch (e) {}
   }
 
+  void _startLocationUpdates() {
+    _requestLocationPermission();
+    
+    _locationTimer = Timer.periodic(const Duration(seconds: 30), (timer) {
+      if (_isLocationPermissionGranted) {
+        _getCurrentLocation();
+      }
+    });
+  }
+
+  Future<void> _forceUpdateLocation() async {
+    
+    try {
+      Position position = await Geolocator.getCurrentPosition(
+        desiredAccuracy: LocationAccuracy.best,
+      );
+
+      final newLocation = LatLng(position.latitude, position.longitude);
+      
+      setState(() {
+        _userLocation = newLocation;
+      });
+
+      _mapController.move(newLocation, 15.0);
+    } catch (e) {
+    }
+  }
+
+
   Future<void> _loadSettings() async {
     try {
       final settings = await DatabaseService.instance.getAllSettings();
@@ -159,13 +194,12 @@ class _MapScreenState extends State<MapScreen> {
     } else if (_lastTrainLocation != null) {
       targetLocation = _lastTrainLocation;
     } else {
-      targetLocation = _defaultPosition;
+      _isMapInitialized = true;
+      return;
     }
 
-    WidgetsBinding.instance.addPostFrameCallback((_) {
+    _centerMap(targetLocation!, zoom: _currentZoom);
-      _centerMap(targetLocation!, zoom: _currentZoom);
+    _isMapInitialized = true;
-      _isMapInitialized = true;
-    });
   }
 
   void _centerMap(LatLng location, {double? zoom}) {
@@ -313,7 +347,7 @@ class _MapScreenState extends State<MapScreen> {
   }
 
   void _centerToMyLocation() {
-    _centerMap(_lastTrainLocation ?? _defaultPosition, zoom: 15.0);
+    _centerMap(_lastTrainLocation ?? const LatLng(39.9042, 116.4074), zoom: 15.0);
   }
 
   void _centerToLastTrain() {
@@ -537,11 +571,12 @@ class _MapScreenState extends State<MapScreen> {
           FlutterMap(
             mapController: _mapController,
             options: MapOptions(
-              initialCenter: _lastTrainLocation ?? _defaultPosition,
+              initialCenter: _lastTrainLocation ?? const LatLng(39.9042, 116.4074),
               initialZoom: _currentZoom,
               initialRotation: _currentRotation,
               minZoom: 4.0,
               maxZoom: 18.0,
+
               onPositionChanged: (MapCamera camera, bool hasGesture) {
                 if (hasGesture) {
                   setState(() {
@@ -552,28 +587,6 @@ class _MapScreenState extends State<MapScreen> {
                   _saveSettings();
                 }
               },
-              onTap: (_, point) {
-                for (final record in _trainRecords) {
-                  final coords = record.getCoordinates();
-                  final dmsCoords = _parseDmsCoordinate(record.positionInfo);
-                  LatLng? recordPosition;
-
-                  if (dmsCoords != null) {
-                    recordPosition = dmsCoords;
-                  } else if (coords['lat'] != 0.0 && coords['lng'] != 0.0) {
-                    recordPosition = LatLng(coords['lat']!, coords['lng']!);
-                  }
-
-                  if (recordPosition != null) {
-                    final distance = const Distance()
-                        .as(LengthUnit.Meter, recordPosition, point);
-                    if (distance < 50) {
-                      _showTrainDetailsDialog(record, recordPosition);
-                      break;
-                    }
-                  }
-                }
-              },
             ),
             children: [
               TileLayer(
@@ -622,10 +635,7 @@ class _MapScreenState extends State<MapScreen> {
                   heroTag: 'myLocation',
                   backgroundColor: const Color(0xFF1E1E1E),
                   onPressed: () {
-                    _getCurrentLocation();
+                    _forceUpdateLocation();
-                    if (_userLocation != null) {
-                      _centerMap(_userLocation!, zoom: 15.0);
-                    }
                   },
                   child: const Icon(Icons.my_location, color: Colors.white),
                 ),

lib/screens/settings_screen.dart

@@ -5,6 +5,7 @@ import 'dart:io';
 import 'package:lbjconsole/models/merged_record.dart';
 import 'package:lbjconsole/services/database_service.dart';
 import 'package:lbjconsole/services/ble_service.dart';
+import 'package:lbjconsole/services/background_service.dart';
 import 'package:lbjconsole/themes/app_theme.dart';
 import 'package:url_launcher/url_launcher.dart';
 
@@ -31,6 +32,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
   bool _notificationsEnabled = true;
   int _recordCount = 0;
   bool _mergeRecordsEnabled = false;
+  bool _hideTimeOnlyRecords = false;
   GroupBy _groupBy = GroupBy.trainAndLoco;
   TimeWindow _timeWindow = TimeWindow.unlimited;
 
@@ -60,6 +62,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
             (settingsMap['backgroundServiceEnabled'] ?? 0) == 1;
         _notificationsEnabled = (settingsMap['notificationEnabled'] ?? 1) == 1;
         _mergeRecordsEnabled = settings.enabled;
+        _hideTimeOnlyRecords = (settingsMap['hideTimeOnlyRecords'] ?? 0) == 1;
         _groupBy = settings.groupBy;
         _timeWindow = settings.timeWindow;
       });
@@ -81,6 +84,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
       'backgroundServiceEnabled': _backgroundServiceEnabled ? 1 : 0,
       'notificationEnabled': _notificationsEnabled ? 1 : 0,
       'mergeRecordsEnabled': _mergeRecordsEnabled ? 1 : 0,
+      'hideTimeOnlyRecords': _hideTimeOnlyRecords ? 1 : 0,
       'groupBy': _groupBy.name,
       'timeWindow': _timeWindow.name,
     });
@@ -196,11 +200,17 @@ class _SettingsScreenState extends State<SettingsScreen> {
                 ),
                 Switch(
                   value: _backgroundServiceEnabled,
-                  onChanged: (value) {
+                  onChanged: (value) async {
                     setState(() {
                       _backgroundServiceEnabled = value;
                     });
-                    _saveSettings();
+                    await _saveSettings();
+
+                    if (value) {
+                      await BackgroundService.startService();
+                    } else {
+                      await BackgroundService.stopService();
+                    }
                   },
                   activeColor: Theme.of(context).colorScheme.primary,
                 ),
@@ -229,6 +239,29 @@ class _SettingsScreenState extends State<SettingsScreen> {
                 ),
               ],
             ),
+            const SizedBox(height: 16),
+            Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: [
+                Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Text('隐藏只有时间有效的记录', style: AppTheme.bodyLarge),
+                    Text('不显示只有时间信息的记录', style: AppTheme.caption),
+                  ],
+                ),
+                Switch(
+                  value: _hideTimeOnlyRecords,
+                  onChanged: (value) {
+                    setState(() {
+                      _hideTimeOnlyRecords = value;
+                    });
+                    _saveSettings();
+                  },
+                  activeColor: Theme.of(context).colorScheme.primary,
+                ),
+              ],
+            ),
           ],
         ),
       ),
@@ -388,9 +421,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
           children: [
             Row(
               children: [
-                Icon(Icons.share, color: Theme.of(context).colorScheme.primary),
+                Icon(Icons.storage, color: Theme.of(context).colorScheme.primary),
                 const SizedBox(width: 12),
-                Text('数据分享', style: AppTheme.titleMedium),
+                Text('数据管理', style: AppTheme.titleMedium),
               ],
             ),
             const SizedBox(height: 16),
@@ -503,8 +536,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
     }
   }
 
-
-
   Future<void> _shareData() async {
     final scaffoldMessenger = ScaffoldMessenger.of(context);
 
@@ -735,7 +766,8 @@ class _SettingsScreenState extends State<SettingsScreen> {
                 if (snapshot.hasData) {
                   return Text(snapshot.data!, style: AppTheme.bodyMedium);
                 } else {
-                  return const Text('v0.1.3-flutter', style: AppTheme.bodyMedium);
+                  return const Text('v0.1.3-flutter',
+                      style: AppTheme.bodyMedium);
                 }
               },
             ),

lib/services/background_service.dart

@@ -0,0 +1,211 @@
+import 'dart:async';
+import 'dart:io';
+import 'dart:ui';
+
+import 'package:flutter_background_service/flutter_background_service.dart';
+import 'package:flutter_background_service_android/flutter_background_service_android.dart';
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+import 'package:lbjconsole/services/ble_service.dart';
+
+const String _notificationChannelId = 'lbj_console_channel';
+const String _notificationChannelName = 'LBJ Console 后台服务';
+const String _notificationChannelDescription = '保持蓝牙连接稳定';
+const int _notificationId = 114514;
+
+class BackgroundService {
+  static final FlutterBackgroundService _service = FlutterBackgroundService();
+  static bool _isInitialized = false;
+
+  static Future<void> initialize() async {
+    if (_isInitialized) return;
+
+    final service = FlutterBackgroundService();
+    
+    final flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
+    
+    if (Platform.isAndroid) {
+      const AndroidNotificationChannel channel = AndroidNotificationChannel(
+        _notificationChannelId,
+        _notificationChannelName,
+        description: _notificationChannelDescription,
+        importance: Importance.low,
+        enableLights: false,
+        enableVibration: false,
+        playSound: false,
+      );
+
+      await flutterLocalNotificationsPlugin.resolvePlatformSpecificImplementation<
+          AndroidFlutterLocalNotificationsPlugin>()?.createNotificationChannel(channel);
+    }
+    
+    await service.configure(
+      androidConfiguration: AndroidConfiguration(
+        onStart: _onStart,
+        autoStart: true,
+        isForegroundMode: true,
+        notificationChannelId: _notificationChannelId,
+        initialNotificationTitle: 'LBJ Console',
+        initialNotificationContent: '蓝牙连接监控中',
+        foregroundServiceNotificationId: _notificationId,
+      ),
+      iosConfiguration: IosConfiguration(
+        autoStart: true,
+        onForeground: _onStart,
+        onBackground: _onIosBackground,
+      ),
+    );
+
+    _isInitialized = true;
+  }
+
+  @pragma('vm:entry-point')
+  static void _onStart(ServiceInstance service) async {
+    DartPluginRegistrant.ensureInitialized();
+
+    if (service is AndroidServiceInstance) {
+      service.on('setAsForeground').listen((event) {
+        service.setAsForegroundService();
+      });
+
+      service.on('setAsBackground').listen((event) {
+        service.setAsBackgroundService();
+      });
+    }
+
+    service.on('stopService').listen((event) {
+      service.stopSelf();
+    });
+
+    BLEService().initialize();
+
+    if (service is AndroidServiceInstance) {
+      await Future.delayed(const Duration(seconds: 1));
+      if (await service.isForegroundService()) {
+        final flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
+        
+        try {
+          const AndroidNotificationChannel channel = AndroidNotificationChannel(
+            _notificationChannelId,
+            _notificationChannelName,
+            description: _notificationChannelDescription,
+            importance: Importance.low,
+            enableLights: false,
+            enableVibration: false,
+            playSound: false,
+          );
+
+          await flutterLocalNotificationsPlugin.resolvePlatformSpecificImplementation<
+              AndroidFlutterLocalNotificationsPlugin>()?.createNotificationChannel(channel);
+
+          await flutterLocalNotificationsPlugin.show(
+            _notificationId,
+            'LBJ Console',
+            '蓝牙连接监控中',
+            NotificationDetails(
+              android: AndroidNotificationDetails(
+                _notificationChannelId,
+                _notificationChannelName,
+                channelDescription: _notificationChannelDescription,
+                icon: '@mipmap/ic_launcher',
+                ongoing: true,
+                autoCancel: false,
+                importance: Importance.low,
+                priority: Priority.low,
+                enableLights: false,
+                enableVibration: false,
+                playSound: false,
+                onlyAlertOnce: true,
+                setAsGroupSummary: false,
+                groupKey: 'lbj_console_group',
+                visibility: NotificationVisibility.public,
+                category: AndroidNotificationCategory.service,
+              ),
+            ),
+          );
+          print('前台服务通知显示成功');
+        } catch (e) {
+          print('前台服务通知显示失败: $e');
+        }
+      }
+    }
+
+    Timer.periodic(const Duration(seconds: 30), (timer) async {
+      if (service is AndroidServiceInstance) {
+        if (await service.isForegroundService()) {
+          try {
+            final bleService = BLEService();
+            final isConnected = bleService.isConnected;
+            final deviceStatus = bleService.deviceStatus;
+            
+            final flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
+            await flutterLocalNotificationsPlugin.show(
+              _notificationId,
+              'LBJ Console',
+              isConnected ? '蓝牙已连接 - $deviceStatus' : '蓝牙未连接 - 自动重连中',
+              NotificationDetails(
+                android: AndroidNotificationDetails(
+                  _notificationChannelId,
+                  _notificationChannelName,
+                  channelDescription: _notificationChannelDescription,
+                  icon: '@mipmap/ic_launcher',
+                  ongoing: true,
+                  autoCancel: false,
+                  importance: Importance.low,
+                  priority: Priority.low,
+                  enableLights: false,
+                  enableVibration: false,
+                  playSound: false,
+                  onlyAlertOnce: true,
+                  setAsGroupSummary: false,
+                  groupKey: 'lbj_console_group',
+                  visibility: NotificationVisibility.public,
+                  category: AndroidNotificationCategory.service,
+                ),
+              ),
+            );
+          } catch (e) {
+            print('前台服务通知更新失败: $e');
+          }
+        }
+      }
+    });
+  }
+
+  @pragma('vm:entry-point')
+  static Future<bool> _onIosBackground(ServiceInstance service) async {
+    return true;
+  }
+
+  static Future<void> startService() async {
+    await initialize();
+    final service = FlutterBackgroundService();
+    
+    if (Platform.isAndroid) {
+      final isRunning = await service.isRunning();
+      if (!isRunning) {
+        service.startService();
+      }
+    } else if (Platform.isIOS) {
+      service.startService();
+    }
+  }
+
+  static Future<void> stopService() async {
+    final service = FlutterBackgroundService();
+    service.invoke('stopService');
+  }
+
+  static Future<bool> isRunning() async {
+    final service = FlutterBackgroundService();
+    return await service.isRunning();
+  }
+
+  static void setForegroundMode(bool isForeground) {
+    final service = FlutterBackgroundService();
+    if (isForeground) {
+      service.invoke('setAsForeground');
+    } else {
+      service.invoke('setAsBackground');
+    }
+  }
+}

lib/services/ble_service.dart

@@ -27,14 +27,19 @@ class BLEService {
       StreamController<TrainRecord>.broadcast();
   final StreamController<bool> _connectionController =
       StreamController<bool>.broadcast();
+  final StreamController<DateTime?> _lastReceivedTimeController =
+      StreamController<DateTime?>.broadcast();
 
   Stream<String> get statusStream => _statusController.stream;
   Stream<TrainRecord> get dataStream => _dataController.stream;
   Stream<bool> get connectionStream => _connectionController.stream;
+  Stream<DateTime?> get lastReceivedTimeStream =>
+      _lastReceivedTimeController.stream;
 
   String _deviceStatus = "未连接";
   String? _lastKnownDeviceAddress;
   String _targetDeviceName = "LBJReceiver";
+  DateTime? _lastReceivedTime;
 
   bool _isConnecting = false;
   bool _isManualDisconnect = false;
@@ -69,8 +74,7 @@ class BLEService {
       if (settings != null) {
         _targetDeviceName = settings['deviceName'] ?? 'LBJReceiver';
       }
-    } catch (e) {
+    } catch (e) {}
-    }
   }
 
   void ensureConnection() {
@@ -315,6 +319,9 @@ class BLEService {
             '${now.millisecondsSinceEpoch}_${Random().nextInt(9999)}';
         recordData['receivedTimestamp'] = now.millisecondsSinceEpoch;
 
+        _lastReceivedTime = now;
+        _lastReceivedTimeController.add(_lastReceivedTime);
+
         final trainRecord = TrainRecord.fromJson(recordData);
         _dataController.add(trainRecord);
         DatabaseService.instance.insertRecord(trainRecord);
@@ -331,6 +338,8 @@ class BLEService {
       _deviceStatus = status;
       _connectedDevice = null;
       _characteristic = null;
+      _lastReceivedTime = null;
+      _lastReceivedTimeController.add(null);
     }
     _statusController.add(_deviceStatus);
     _connectionController.add(connected);
@@ -357,5 +366,6 @@ class BLEService {
     _statusController.close();
     _dataController.close();
     _connectionController.close();
+    _lastReceivedTimeController.close();
   }
 }

lib/services/database_service.dart

@@ -13,7 +13,7 @@ class DatabaseService {
   DatabaseService._internal();
 
   static const String _databaseName = 'train_database';
-  static const _databaseVersion = 1;
+  static const _databaseVersion = 2;
 
   static const String trainRecordsTable = 'train_records';
   static const String appSettingsTable = 'app_settings';
@@ -34,9 +34,17 @@ class DatabaseService {
       path,
       version: _databaseVersion,
       onCreate: _onCreate,
+      onUpgrade: _onUpgrade,
     );
   }
 
+  Future<void> _onUpgrade(Database db, int oldVersion, int newVersion) async {
+    if (oldVersion < 2) {
+      await db.execute(
+          'ALTER TABLE $appSettingsTable ADD COLUMN hideTimeOnlyRecords INTEGER NOT NULL DEFAULT 0');
+    }
+  }
+
   Future<void> _onCreate(Database db, int version) async {
     await db.execute('''
       CREATE TABLE IF NOT EXISTS $trainRecordsTable (
@@ -79,6 +87,7 @@ class DatabaseService {
         backgroundServiceEnabled INTEGER NOT NULL DEFAULT 0,
         notificationEnabled INTEGER NOT NULL DEFAULT 0,
         mergeRecordsEnabled INTEGER NOT NULL DEFAULT 0,
+        hideTimeOnlyRecords INTEGER NOT NULL DEFAULT 0,
         groupBy TEXT NOT NULL DEFAULT 'trainAndLoco',
         timeWindow TEXT NOT NULL DEFAULT 'unlimited'
       )
@@ -102,6 +111,7 @@ class DatabaseService {
       'backgroundServiceEnabled': 0,
       'notificationEnabled': 0,
       'mergeRecordsEnabled': 0,
+      'hideTimeOnlyRecords': 0,
       'groupBy': 'trainAndLoco',
       'timeWindow': 'unlimited',
     });

lib/services/map_state_service.dart

@@ -0,0 +1,113 @@
+import 'dart:convert';
+import 'package:sqflite/sqflite.dart';
+import 'package:lbjconsole/models/map_state.dart';
+import 'database_service.dart';
+
+class MapStateService {
+  static final MapStateService instance = MapStateService._internal();
+  factory MapStateService() => instance;
+  MapStateService._internal();
+
+  static const String _tableName = 'record_map_states';
+  
+  final Map<String, MapState> _memoryCache = {};
+
+  Future<void> _ensureTableExists() async {
+    final db = await DatabaseService.instance.database;
+    await db.execute('''
+      CREATE TABLE IF NOT EXISTS $_tableName (
+        key TEXT PRIMARY KEY,
+        state TEXT NOT NULL,
+        updated_at INTEGER NOT NULL
+      )
+    ''');
+  }
+
+  String getSingleRecordMapKey(String recordId) {
+    return "${recordId}_record_map";
+  }
+
+  String getMergedRecordMapKey(String groupKey) {
+    return "${groupKey}_group_map";
+  }
+
+  Future<void> saveMapState(String key, MapState state) async {
+    try {
+      _memoryCache[key] = state;
+      
+      final db = await DatabaseService.instance.database;
+      await _ensureTableExists();
+      
+      await db.insert(
+        _tableName,
+        {
+          'key': key,
+          'state': jsonEncode(state.toJson()),
+          'updated_at': DateTime.now().millisecondsSinceEpoch,
+        },
+        conflictAlgorithm: ConflictAlgorithm.replace,
+      );
+    } catch (e) {
+      print('保存地图状态失败: $e');
+    }
+  }
+
+  Future<MapState?> getMapState(String key) async {
+    if (_memoryCache.containsKey(key)) {
+      return _memoryCache[key];
+    }
+
+    try {
+      final db = await DatabaseService.instance.database;
+      await _ensureTableExists();
+      
+      final result = await db.query(
+        _tableName,
+        where: 'key = ?',
+        whereArgs: [key],
+        limit: 1,
+      );
+
+      if (result.isNotEmpty) {
+        final stateJson = jsonDecode(result.first['state'] as String);
+        final state = MapState.fromJson(stateJson);
+        _memoryCache[key] = state;
+        return state;
+      }
+    } catch (e) {
+      print('读取地图状态失败: $e');
+    }
+    
+    return null;
+  }
+
+  Future<void> deleteMapState(String key) async {
+    _memoryCache.remove(key);
+    
+    try {
+      final db = await DatabaseService.instance.database;
+      await db.delete(
+        _tableName,
+        where: 'key = ?',
+        whereArgs: [key],
+      );
+    } catch (e) {
+      print('删除地图状态失败: $e');
+    }
+  }
+
+  Future<void> clearAllMapStates() async {
+    _memoryCache.clear();
+    
+    try {
+      final db = await DatabaseService.instance.database;
+      await db.delete(_tableName);
+    } catch (e) {
+      print('清空地图状态失败: $e');
+    }
+  }
+
+  void clearMemoryCache() {
+    _memoryCache.clear();
+  }
+}

lib/services/merge_service.dart

@@ -5,7 +5,7 @@ class MergeService {
   static String? _generateGroupKey(TrainRecord record, GroupBy groupBy) {
     final train = record.train.trim();
     final loco = record.loco.trim();
-    final hasTrain = train.isNotEmpty && train != "<NUL>";
+    final hasTrain = train.isNotEmpty && train != "<NUL>" && !train.contains("-----");
     final hasLoco = loco.isNotEmpty && loco != "<NUL>";
 
     switch (groupBy) {

lib/services/notification_service.dart

@@ -61,7 +61,7 @@ class NotificationService {
       return;
     }
 
-    final String title = '列车信息更新';
+    final String title = '列车信息';
     final String body = _buildNotificationContent(record);
 
     final AndroidNotificationDetails androidPlatformChannelSpecifics =

macos/Runner/Configs/AppInfo.xcconfig

@@ -5,7 +5,7 @@
 // 'flutter create' template.
 
 // The application's name. By default this is also the title of the Flutter window.
-PRODUCT_NAME = lbjconsole
+PRODUCT_NAME = LBJ Console
 
 // The application's bundle identifier
 PRODUCT_BUNDLE_IDENTIFIER = org.noxylva.lbjconsole

pubspec.lock

@@ -278,6 +278,38 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_background_service:
+    dependency: "direct main"
+    description:
+      name: flutter_background_service
+      sha256: "70a1c185b1fa1a44f8f14ecd6c86f6e50366e3562f00b2fa5a54df39b3324d3d"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "5.1.0"
+  flutter_background_service_android:
+    dependency: transitive
+    description:
+      name: flutter_background_service_android
+      sha256: ca0793d4cd19f1e194a130918401a3d0b1076c81236f7273458ae96987944a87
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "6.3.1"
+  flutter_background_service_ios:
+    dependency: transitive
+    description:
+      name: flutter_background_service_ios
+      sha256: "6037ffd45c4d019dab0975c7feb1d31012dd697e25edc05505a4a9b0c7dc9fba"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "5.0.3"
+  flutter_background_service_platform_interface:
+    dependency: transitive
+    description:
+      name: flutter_background_service_platform_interface
+      sha256: ca74aa95789a8304f4d3f57f07ba404faa86bed6e415f83e8edea6ad8b904a41
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "5.1.2"
   flutter_blue_plus:
     dependency: "direct main"
     description:
@@ -888,6 +920,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "0.28.0"
+  scrollview_observer:
+    dependency: "direct main"
+    description:
+      name: scrollview_observer
+      sha256: c2f713509f18f88f637b2084b47a90c91fb1ef066d5d82d2cf3194d8509dc6ab
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.26.2"
   share_plus:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -16,7 +16,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 0.1.5-flutter
+version: 0.3.0-flutter+30
 
 environment:
   sdk: ^3.5.4
@@ -52,6 +52,8 @@ dependencies:
   file_picker: ^8.1.2
   package_info_plus: ^8.1.2
   msix: ^3.16.12
+  flutter_background_service: ^5.1.0
+  scrollview_observer: ^1.20.0
 
 dev_dependencies:
   flutter_test: