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

fix: repair record processing logic
refactor: optimize record card rendering logic and animation effects
2025-09-25 22:52:19 +08:00 · 2025-09-25 22:25:51 +08:00 · 2025-09-25 22:01:25 +08:00 · 2025-09-25 21:45:52 +08:00 · 2025-09-25 00:44:03 +08:00 · 2025-09-24 23:36:55 +08:00
17 changed files with 1199 additions and 109 deletions
--- a/android/app/src/main/AndroidManifest.xml
+++ b/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="${applicationName}"
        android:icon="@mipmap/ic_launcher">
        <activity
@@ -47,6 +49,15 @@
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
+            
+        <!-- 前台服务配置 -->
+        <service
+            android:name="id.flutter.flutter_background_service.BackgroundService"
+            android:foregroundServiceType="connectedDevice|dataSync"
+            android:exported="false"
+            android:stopWithTask="false"
+            android:enabled="true"
+            tools:replace="android:exported"/>
    </application>
    <!-- Required to query activities that can process text, see:
         https://developer.android.com/training/package-visibility and
--- a/ios/Runner/Info.plist
+++ b/ios/Runner/Info.plist
@@ -5,7 +5,7 @@
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(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>
--- a/lib/main.dart
+++ b/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});

--- a/lib/models/map_state.dart
+++ b/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;
+  }
+}
--- a/lib/models/train_record.dart
+++ b/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 "";
    }

--- a/lib/screens/history_screen.dart
+++ b/lib/screens/history_screen.dart
@@ -1,12 +1,18 @@
 import 'dart:math' as math;
 import 'dart:isolate';
+import 'dart:async';
+import 'dart:convert';
 import 'package:flutter/material.dart';
+import 'package:flutter/scheduler.dart';
 import 'package:flutter_map/flutter_map.dart';
 import 'package:latlong2/latlong.dart';
+import 'package:scrollview_observer/scrollview_observer.dart';
 import '../models/merged_record.dart';
 import '../services/database_service.dart';
 import '../models/train_record.dart';
 import '../services/merge_service.dart';
+import '../models/map_state.dart';
+import '../services/map_state_service.dart';

 class HistoryScreen extends StatefulWidget {
  final Function(bool isEditing) onEditModeChanged;
@@ -29,8 +35,12 @@ class HistoryScreenState extends State<HistoryScreen> {
  final Set<String> _selectedRecords = {};
  final Map<String, bool> _expandedStates = {};
  final ScrollController _scrollController = ScrollController();
+  final ListObserverController _observerController =
+      ListObserverController(controller: null)..cacheJumpIndexOffset = false;
+  late final ChatScrollObserver _chatObserver;
  bool _isAtTop = true;
  MergeSettings _mergeSettings = MergeSettings();
+  double _itemHeightCache = 0.0;

  final Map<String, double> _mapOptimalZoom = {};
  final Map<String, bool> _mapCalculating = {};
@@ -50,10 +60,17 @@ class HistoryScreenState extends State<HistoryScreen> {
    });
  }

+  Future<void> reloadRecords() async {
+    await loadRecords(scrollToTop: false);
+  }
+
  @override
  void initState() {
    super.initState();
-    loadRecords();
+    _chatObserver = ChatScrollObserver(_observerController)
+      ..toRebuildScrollViewCallback = () {
+        setState(() {});
+      };
    _scrollController.addListener(() {
      if (_scrollController.position.atEdge) {
        if (_scrollController.position.pixels == 0) {
@@ -63,32 +80,106 @@ class HistoryScreenState extends State<HistoryScreen> {
        if (_isAtTop) setState(() => _isAtTop = false);
      }
    });
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (mounted) loadRecords();
+    });
  }

  @override
  void dispose() {
    _scrollController.dispose();
+    _observerController.controller?.dispose();
    super.dispose();
  }

  Future<void> loadRecords({bool scrollToTop = true}) async {
-    if (mounted) setState(() => _isLoading = true);
    try {
      final allRecords = await DatabaseService.instance.getAllRecords();
      final settingsMap = await DatabaseService.instance.getAllSettings() ?? {};
      _mergeSettings = MergeSettings.fromMap(settingsMap);
-      final items = MergeService.getMixedList(allRecords, _mergeSettings);
+
+      List<TrainRecord> filteredRecords = allRecords;
+      if ((settingsMap['hideTimeOnlyRecords'] ?? 0) == 1) {
+        int hiddenCount = 0;
+        int shownCount = 0;
+
+        filteredRecords = allRecords.where((record) {
+          bool isFieldMeaningful(String field) {
+            if (field.isEmpty) return false;
+            String cleaned = field.replaceAll('<NUL>', '').trim();
+            if (cleaned.isEmpty) return false;
+            if (cleaned.runes
+                .every((r) => r == '*'.runes.first || r == ' '.runes.first))
+              return false;
+            return true;
+          }
+
+          final hasTrainNumber = isFieldMeaningful(record.fullTrainNumber) &&
+              !record.fullTrainNumber.contains("-----");
+
+          final hasDirection = record.direction == 1 || record.direction == 3;
+
+          final hasLocoInfo = isFieldMeaningful(record.locoType) ||
+              isFieldMeaningful(record.loco);
+
+          final hasRoute = isFieldMeaningful(record.route);
+
+          final hasPosition = isFieldMeaningful(record.position);
+
+          final hasSpeed =
+              isFieldMeaningful(record.speed) && record.speed != "NUL";
+
+          final hasPositionInfo = isFieldMeaningful(record.positionInfo);
+
+          final hasTrainType =
+              isFieldMeaningful(record.trainType) && record.trainType != "未知";
+
+          final hasLbjClass =
+              isFieldMeaningful(record.lbjClass) && record.lbjClass != "NA";
+
+          final hasTrain = isFieldMeaningful(record.train) &&
+              !record.train.contains("-----");
+
+          final shouldShow = hasTrainNumber ||
+              hasDirection ||
+              hasLocoInfo ||
+              hasRoute ||
+              hasPosition ||
+              hasSpeed ||
+              hasPositionInfo ||
+              hasTrainType ||
+              hasLbjClass ||
+              hasTrain;
+
+          if (!shouldShow) {
+            hiddenCount++;
+          } else {
+            shownCount++;
+          }
+
+          return shouldShow;
+        }).toList();
+      }
+
+      final items = MergeService.getMixedList(filteredRecords, _mergeSettings);

      if (mounted) {
-        setState(() {
-          _displayItems.clear();
-          _displayItems.addAll(items);
-          _isLoading = false;
-        });
-        if (scrollToTop && (_isAtTop) && _scrollController.hasClients) {
-          _scrollController.animateTo(0.0,
-              duration: const Duration(milliseconds: 300),
-              curve: Curves.easeOut);
+        final hasDataChanged = _hasDataChanged(items);
+
+        if (hasDataChanged) {
+          setState(() {
+            _displayItems.clear();
+            _displayItems.addAll(items);
+            _isLoading = false;
+          });
+
+          if (scrollToTop && _isAtTop && _scrollController.hasClients) {
+            _scrollController.jumpTo(0.0);
+          }
+        } else {
+          if (_isLoading) {
+            setState(() => _isLoading = false);
+          }
        }
      }
    } catch (e) {
@@ -96,9 +187,120 @@ class HistoryScreenState extends State<HistoryScreen> {
    }
  }

+  Future<void> addNewRecord(TrainRecord newRecord) async {
+    try {
+      final settingsMap = await DatabaseService.instance.getAllSettings() ?? {};
+      _mergeSettings = MergeSettings.fromMap(settingsMap);
+
+      if ((settingsMap['hideTimeOnlyRecords'] ?? 0) == 1) {
+        bool isFieldMeaningful(String field) {
+          if (field.isEmpty) return false;
+          String cleaned = field.replaceAll('<NUL>', '').trim();
+          if (cleaned.isEmpty) return false;
+          if (cleaned.runes
+              .every((r) => r == '*'.runes.first || r == ' '.runes.first))
+            return false;
+          return true;
+        }
+
+        final hasTrainNumber = isFieldMeaningful(newRecord.fullTrainNumber) &&
+            !newRecord.fullTrainNumber.contains("-----");
+
+        final hasDirection =
+            newRecord.direction == 1 || newRecord.direction == 3;
+
+        final hasLocoInfo = isFieldMeaningful(newRecord.locoType) ||
+            isFieldMeaningful(newRecord.loco);
+
+        final hasRoute = isFieldMeaningful(newRecord.route);
+
+        final hasPosition = isFieldMeaningful(newRecord.position);
+
+        final hasSpeed =
+            isFieldMeaningful(newRecord.speed) && newRecord.speed != "NUL";
+
+        final hasPositionInfo = isFieldMeaningful(newRecord.positionInfo);
+
+        final hasTrainType = isFieldMeaningful(newRecord.trainType) &&
+            newRecord.trainType != "未知";
+
+        final hasLbjClass =
+            isFieldMeaningful(newRecord.lbjClass) && newRecord.lbjClass != "NA";
+
+        final hasTrain = isFieldMeaningful(newRecord.train) &&
+            !newRecord.train.contains("-----");
+
+        if (!hasTrainNumber &&
+            !hasDirection &&
+            !hasLocoInfo &&
+            !hasRoute &&
+            !hasPosition &&
+            !hasSpeed &&
+            !hasPositionInfo &&
+            !hasTrainType &&
+            !hasLbjClass &&
+            !hasTrain) {
+          return;
+        }
+      }
+
+      final isNewRecord = !_displayItems.any((item) {
+        if (item is TrainRecord) {
+          return item.uniqueId == newRecord.uniqueId;
+        } else if (item is MergedTrainRecord) {
+          return item.records.any((r) => r.uniqueId == newRecord.uniqueId);
+        }
+        return false;
+      });
+
+      if (!isNewRecord) return;
+
+      final allRecords = await DatabaseService.instance.getAllRecords();
+      final items = MergeService.getMixedList(allRecords, _mergeSettings);
+
+      if (mounted) {
+        if (!_isAtTop) {
+          _chatObserver.standby();
+        }
+
+        final hasDataChanged = _hasDataChanged(items);
+        if (hasDataChanged) {
+          setState(() {
+            _displayItems.clear();
+            _displayItems.addAll(items);
+          });
+        }
+
+        if (_isAtTop && _scrollController.hasClients) {
+          _scrollController.jumpTo(0.0);
+        }
+      }
+    } catch (e) {}
+  }
+
+  bool _hasDataChanged(List<Object> newItems) {
+    if (_displayItems.length != newItems.length) return true;
+
+    for (int i = 0; i < _displayItems.length; i++) {
+      final oldItem = _displayItems[i];
+      final newItem = newItems[i];
+
+      if (oldItem.runtimeType != newItem.runtimeType) return true;
+
+      if (oldItem is TrainRecord && newItem is TrainRecord) {
+        if (oldItem.uniqueId != newItem.uniqueId) return true;
+      } else if (oldItem is MergedTrainRecord && newItem is MergedTrainRecord) {
+        if (oldItem.groupKey != newItem.groupKey) return true;
+        if (oldItem.records.length != newItem.records.length) return true;
+      }
+    }
+
+    return false;
+  }
+
  @override
  Widget build(BuildContext context) {
-    if (_isLoading) {
+    if (_isLoading && _displayItems.isEmpty) {
      return const Center(child: CircularProgressIndicator());
    }
    if (_displayItems.isEmpty) {
@@ -109,8 +311,12 @@ class HistoryScreenState extends State<HistoryScreen> {
        Text('暂无记录', style: TextStyle(color: Colors.white, fontSize: 18))
      ]));
    }
-    return ListView.builder(
+    return ListViewObserver(
+      controller: _observerController,
+      child: ListView.builder(
        controller: _scrollController,
+        physics: ChatObserverClampingScrollPhysics(observer: _chatObserver),
+        shrinkWrap: _chatObserver.isShrinkWrap,
        padding: const EdgeInsets.all(16.0),
        itemCount: _displayItems.length,
        itemBuilder: (context, index) {
@@ -118,10 +324,12 @@ class HistoryScreenState extends State<HistoryScreen> {
          if (item is MergedTrainRecord) {
            return _buildMergedRecordCard(item);
          } else if (item is TrainRecord) {
-            return _buildRecordCard(item);
+            return _buildRecordCard(item, key: ValueKey(item.uniqueId));
          }
          return const SizedBox.shrink();
-        });
+        },
+      ),
+    );
  }

  Widget _buildMergedRecordCard(MergedTrainRecord mergedRecord) {
@@ -197,7 +405,7 @@ class HistoryScreenState extends State<HistoryScreen> {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
-        _buildExpandedMapForAll(mergedRecord.records),
+        _buildExpandedMapForAll(mergedRecord.records, mergedRecord.groupKey),
        const Divider(color: Colors.white24, height: 24),
        ...mergedRecord.records.map((record) => _buildSubRecordItem(
            record, mergedRecord.latestRecord, _mergeSettings.groupBy)),
@@ -353,7 +561,7 @@ class HistoryScreenState extends State<HistoryScreen> {
    return parts.join(' ');
  }

-  Widget _buildExpandedMapForAll(List<TrainRecord> records) {
+  Widget _buildExpandedMapForAll(List<TrainRecord> records, String groupKey) {
    final positions = records
        .map((record) => _parsePosition(record.positionInfo))
        .whereType<LatLng>()
@@ -410,6 +618,7 @@ class HistoryScreenState extends State<HistoryScreen> {
            positions: positions,
            center: bounds.center,
            zoom: zoomLevel,
+            groupKey: groupKey,
          ))
    ]);
  }
@@ -420,11 +629,16 @@ class HistoryScreenState extends State<HistoryScreen> {
    return 10.0;
  }

-  Widget _buildRecordCard(TrainRecord record, {bool isSubCard = false}) {
+  Widget _buildRecordCard(TrainRecord record,
+      {bool isSubCard = false, Key? key}) {
    final isSelected = _selectedRecords.contains(record.uniqueId);
    final isExpanded =
        !isSubCard && (_expandedStates[record.uniqueId] ?? false);
-    return Card(
+
+    final GlobalKey itemKey = GlobalKey();
+
+    final Widget card = Card(
+        key: key ?? itemKey,
        color: isSelected && _isEditMode
            ? const Color(0xFF2E2E2E)
            : const Color(0xFF1E1E1E),
@@ -451,15 +665,23 @@ class HistoryScreenState extends State<HistoryScreen> {
                });
              } else if (!isSubCard) {
                if (isExpanded) {
-                  setState(() {
-                    _expandedStates[record.uniqueId] = false;
-                    _mapOptimalZoom.remove(record.uniqueId);
-                    _mapCalculating.remove(record.uniqueId);
-                  });
+                  final shouldUpdate =
+                      _expandedStates[record.uniqueId] == true ||
+                          _mapOptimalZoom.containsKey(record.uniqueId) ||
+                          _mapCalculating.containsKey(record.uniqueId);
+                  if (shouldUpdate) {
+                    setState(() {
+                      _expandedStates[record.uniqueId] = false;
+                      _mapOptimalZoom.remove(record.uniqueId);
+                      _mapCalculating.remove(record.uniqueId);
+                    });
+                  }
                } else {
-                  setState(() {
-                    _expandedStates[record.uniqueId] = true;
-                  });
+                  if (_expandedStates[record.uniqueId] != true) {
+                    setState(() {
+                      _expandedStates[record.uniqueId] = true;
+                    });
+                  }
                }
              }
            },
@@ -478,14 +700,27 @@ class HistoryScreenState extends State<HistoryScreen> {
                      _buildRecordHeader(record),
                      _buildPositionAndSpeed(record),
                      _buildLocoInfo(record),
-                      if (isExpanded) _buildExpandedContent(record)
+                      if (isExpanded) _buildExpandedContent(record),
                    ]))));
+
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (_itemHeightCache <= 0 && itemKey.currentContext != null) {
+        final RenderBox renderBox =
+            itemKey.currentContext!.findRenderObject() as RenderBox;
+        final double realHeight = renderBox.size.height;
+        if (realHeight > 0) {
+          setState(() {
+            _itemHeightCache = realHeight;
+          });
+        }
+      }
+    });
+
+    return card;
  }

  Widget _buildRecordHeader(TrainRecord record, {bool isMerged = false}) {
    final trainType = record.trainType;
-    final trainDisplay =
-        record.fullTrainNumber.isEmpty ? "未知列车" : record.fullTrainNumber;
    String formattedLocoInfo = "";
    if (record.locoType.isNotEmpty && record.loco.isNotEmpty) {
      final shortLoco = record.loco.length > 5
@@ -497,6 +732,22 @@ class HistoryScreenState extends State<HistoryScreen> {
    } else if (record.loco.isNotEmpty) {
      formattedLocoInfo = record.loco;
    }
+
+    if (record.fullTrainNumber.isEmpty && formattedLocoInfo.isEmpty) {
+      return Text(
+          (record.time == "<NUL>" || record.time.isEmpty)
+              ? record.receivedTimestamp.toString().split(".")[0]
+              : record.time.split("\n")[0],
+          style: const TextStyle(fontSize: 11, color: Colors.grey),
+          overflow: TextOverflow.ellipsis);
+    }
+
+    final hasTrainNumber = record.fullTrainNumber.isNotEmpty;
+    final hasDirection = record.direction == 1 || record.direction == 3;
+    final hasLocoInfo =
+        formattedLocoInfo.isNotEmpty && formattedLocoInfo != "<NUL>";
+    final shouldShowTrainRow = hasTrainNumber || hasDirection || hasLocoInfo;
+
    return Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
      Row(mainAxisAlignment: MainAxisAlignment.spaceBetween, children: [
        Flexible(
@@ -512,43 +763,47 @@ class HistoryScreenState extends State<HistoryScreen> {
                  style: const TextStyle(fontSize: 11, color: Colors.grey),
                  overflow: TextOverflow.ellipsis))
      ]),
-      const SizedBox(height: 2),
-      Row(
-          mainAxisAlignment: MainAxisAlignment.spaceBetween,
-          crossAxisAlignment: CrossAxisAlignment.center,
-          children: [
-            Flexible(
-                child: Row(
-                    mainAxisSize: MainAxisSize.min,
-                    crossAxisAlignment: CrossAxisAlignment.center,
-                    children: [
-                  Flexible(
-                      child: Text(trainDisplay,
-                          style: const TextStyle(
-                              fontSize: 20,
-                              fontWeight: FontWeight.bold,
-                              color: Colors.white),
-                          overflow: TextOverflow.ellipsis)),
-                  const SizedBox(width: 6),
-                  if (record.direction == 1 || record.direction == 3)
-                    Container(
-                        width: 20,
-                        height: 20,
-                        decoration: BoxDecoration(
-                            color: Colors.white,
-                            borderRadius: BorderRadius.circular(2)),
-                        child: Center(
-                            child: Text(record.direction == 1 ? "下" : "上",
-                                style: const TextStyle(
-                                    fontSize: 12,
-                                    fontWeight: FontWeight.bold,
-                                    color: Colors.black))))
-                ])),
-            if (formattedLocoInfo.isNotEmpty && formattedLocoInfo != "<NUL>")
-              Text(formattedLocoInfo,
-                  style: const TextStyle(fontSize: 14, color: Colors.white70))
-          ]),
-      const SizedBox(height: 2)
+      if (shouldShowTrainRow) ...[
+        const SizedBox(height: 2),
+        Row(
+            mainAxisAlignment: MainAxisAlignment.spaceBetween,
+            crossAxisAlignment: CrossAxisAlignment.center,
+            children: [
+              Flexible(
+                  child: Row(
+                      mainAxisSize: MainAxisSize.min,
+                      crossAxisAlignment: CrossAxisAlignment.center,
+                      children: [
+                    if (hasTrainNumber)
+                      Flexible(
+                          child: Text(record.fullTrainNumber,
+                              style: const TextStyle(
+                                  fontSize: 20,
+                                  fontWeight: FontWeight.bold,
+                                  color: Colors.white),
+                              overflow: TextOverflow.ellipsis)),
+                    if (hasTrainNumber && hasDirection)
+                      const SizedBox(width: 6),
+                    if (hasDirection)
+                      Container(
+                          width: 20,
+                          height: 20,
+                          decoration: BoxDecoration(
+                              color: Colors.white,
+                              borderRadius: BorderRadius.circular(2)),
+                          child: Center(
+                              child: Text(record.direction == 1 ? "下" : "上",
+                                  style: const TextStyle(
+                                      fontSize: 12,
+                                      fontWeight: FontWeight.bold,
+                                      color: Colors.black))))
+                  ])),
+              if (hasLocoInfo)
+                Text(formattedLocoInfo,
+                    style: const TextStyle(fontSize: 14, color: Colors.white70))
+            ]),
+        const SizedBox(height: 2)
+      ]
    ]);
  }

@@ -664,6 +919,7 @@ class HistoryScreenState extends State<HistoryScreen> {
            key: ValueKey('map_${mapId}_$zoomLevel'),
            position: position,
            zoom: zoomLevel,
+            recordId: record.uniqueId,
          ))
    ]);
  }
@@ -803,11 +1059,13 @@ _BoundaryBox _calculateBoundaryBoxIsolate(List<LatLng> positions) {
 class _DelayedMapWithMarker extends StatefulWidget {
  final LatLng position;
  final double zoom;
+  final String recordId;

  const _DelayedMapWithMarker({
    Key? key,
    required this.position,
    required this.zoom,
+    required this.recordId,
  }) : super(key: key);

  @override
@@ -815,11 +1073,90 @@ class _DelayedMapWithMarker extends StatefulWidget {
 }

 class _DelayedMapWithMarkerState extends State<_DelayedMapWithMarker> {
+  late final MapController _mapController;
+  late final String _mapKey;
+  bool _isInitializing = true;
+
+  @override
+  void initState() {
+    super.initState();
+    _mapController = MapController();
+    _mapKey = MapStateService.instance.getSingleRecordMapKey(widget.recordId);
+    _initializeMapState();
+  }
+
+  Future<void> _initializeMapState() async {
+    final savedState = await MapStateService.instance.getMapState(_mapKey);
+    if (savedState != null && mounted) {
+      _mapController.move(
+        LatLng(savedState.centerLat, savedState.centerLng),
+        savedState.zoom,
+      );
+      if (savedState.bearing != 0.0) {
+        _mapController.rotate(savedState.bearing);
+      }
+    }
+    setState(() {
+      _isInitializing = false;
+    });
+  }
+
+  void _onCameraMove() {
+    if (_isInitializing) return;
+
+    final camera = _mapController.camera;
+    final state = MapState(
+      zoom: camera.zoom,
+      centerLat: camera.center.latitude,
+      centerLng: camera.center.longitude,
+      bearing: camera.rotation,
+    );
+
+    MapStateService.instance.saveMapState(_mapKey, state);
+  }
+
+  @override
+  void dispose() {
+    _mapController.dispose();
+    super.dispose();
+  }
+
  @override
  Widget build(BuildContext context) {
+    if (_isInitializing) {
+      return FlutterMap(
+        options: MapOptions(
+          initialCenter: widget.position,
+          initialZoom: widget.zoom,
+          onPositionChanged: (position, hasGesture) => _onCameraMove(),
+        ),
+        mapController: _mapController,
+        children: [
+          TileLayer(
+              urlTemplate: 'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
+              userAgentPackageName: 'org.noxylva.lbjconsole'),
+          MarkerLayer(markers: [
+            Marker(
+                point: widget.position,
+                width: 40,
+                height: 40,
+                child: Container(
+                    decoration: BoxDecoration(
+                        color: Colors.red,
+                        borderRadius: BorderRadius.circular(20),
+                        border: Border.all(color: Colors.white, width: 2)),
+                    child:
+                        const Icon(Icons.train, color: Colors.white, size: 20)))
+          ])
+        ],
+      );
+    }
+
    return FlutterMap(
-      options:
-          MapOptions(initialCenter: widget.position, initialZoom: widget.zoom),
+      options: MapOptions(
+        onPositionChanged: (position, hasGesture) => _onCameraMove(),
+      ),
+      mapController: _mapController,
      children: [
        TileLayer(
            urlTemplate: 'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
@@ -846,12 +1183,14 @@ class _DelayedMultiMarkerMap extends StatefulWidget {
  final List<LatLng> positions;
  final LatLng center;
  final double zoom;
+  final String groupKey;

  const _DelayedMultiMarkerMap({
    Key? key,
    required this.positions,
    required this.center,
    required this.zoom,
+    required this.groupKey,
  }) : super(key: key);

  @override
@@ -859,15 +1198,65 @@ class _DelayedMultiMarkerMap extends StatefulWidget {
 }

 class _DelayedMultiMarkerMapState extends State<_DelayedMultiMarkerMap> {
+  late final MapController _mapController;
+  late final String _mapKey;
+  bool _isInitializing = true;
+
+  @override
+  void initState() {
+    super.initState();
+    _mapController = MapController();
+    _mapKey = MapStateService.instance.getMergedRecordMapKey(widget.groupKey);
+    _initializeMapState();
+  }
+
+  Future<void> _initializeMapState() async {
+    final savedState = await MapStateService.instance.getMapState(_mapKey);
+    if (savedState != null && mounted) {
+      _mapController.move(
+        LatLng(savedState.centerLat, savedState.centerLng),
+        savedState.zoom,
+      );
+      if (savedState.bearing != 0.0) {
+        _mapController.rotate(savedState.bearing);
+      }
+    } else if (mounted) {
+      _mapController.move(widget.center, widget.zoom);
+    }
+    setState(() {
+      _isInitializing = false;
+    });
+  }
+
+  void _onCameraMove() {
+    if (_isInitializing) return;
+
+    final camera = _mapController.camera;
+    final state = MapState(
+      zoom: camera.zoom,
+      centerLat: camera.center.latitude,
+      centerLng: camera.center.longitude,
+      bearing: camera.rotation,
+    );
+
+    MapStateService.instance.saveMapState(_mapKey, state);
+  }
+
+  @override
+  void dispose() {
+    _mapController.dispose();
+    super.dispose();
+  }
+
  @override
  Widget build(BuildContext context) {
    return FlutterMap(
      options: MapOptions(
-        initialCenter: widget.center,
-        initialZoom: widget.zoom,
+        onPositionChanged: (position, hasGesture) => _onCameraMove(),
        minZoom: 5,
        maxZoom: 18,
      ),
+      mapController: _mapController,
      children: [
        TileLayer(
          urlTemplate: 'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
--- a/lib/screens/main_screen.dart
+++ b/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(
-              width: 8,
-              height: 8,
-              decoration: BoxDecoration(
-                color: _bleService.isConnected ? Colors.green : Colors.red,
-                shape: BoxShape.circle,
-              ),
+            _ConnectionStatusWidget(
+              bleService: _bleService,
+              lastReceivedTime: _lastReceivedTime,
            ),
-            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,
--- a/lib/screens/settings_screen.dart
+++ b/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);

@@ -530,7 +561,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
        if (exportedPath != null) {
          final file = File(exportedPath);
          final fileName = file.path.split(Platform.pathSeparator).last;
-          
+
          await Share.shareXFiles(
            [XFile(file.path)],
            subject: 'LBJ Console Data',
@@ -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);
                }
              },
            ),
--- a/lib/services/background_service.dart
+++ b/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');
+    }
+  }
+}
--- a/lib/services/ble_service.dart
+++ b/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();
  }
 }
--- a/lib/services/database_service.dart
+++ b/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',
    });
--- a/lib/services/map_state_service.dart
+++ b/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();
+  }
+}
--- a/lib/services/merge_service.dart
+++ b/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) {
--- a/lib/services/notification_service.dart
+++ b/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 =
--- a/macos/Runner/Configs/AppInfo.xcconfig
+++ b/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
--- a/pubspec.lock
+++ b/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:
--- a/pubspec.yaml
+++ b/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: 0.1.7-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:
Author	SHA1	Message	Date
Nedifinita	64401a6ce9	feat: add the function to hide records that are only valid for time.	2025-09-25 22:52:19 +08:00
Nedifinita	72f9dfe17b	fix: repair record processing logic	2025-09-25 22:25:51 +08:00
Nedifinita	bf850eed38	refactor: optimize record card rendering logic and animation effects	2025-09-25 22:01:25 +08:00
Nedifinita	56689fc993	feat: optimize record list	2025-09-25 21:45:52 +08:00
Nedifinita	ba373f749a	feat: optimize Bluetooth connection status display	2025-09-25 00:44:03 +08:00
Nedifinita	23ab5ec746	feat: add background services and map status management	2025-09-24 23:36:55 +08:00