feat: update locomotive type support and optimized position display format

refactor: optimize train record merging logic
fix: optimize the display logic of history item spacing
2025-08-19 19:11:52 +08:00 · 2025-08-19 18:06:02 +08:00 · 2025-08-19 17:43:21 +08:00 · 2025-08-19 17:03:09 +08:00 · 2025-08-19 16:35:47 +08:00 · 2025-08-17 14:24:54 +08:00
56 changed files with 1585 additions and 924 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -13,10 +13,12 @@ captures
 .externalNativeBuild
 .cxx
 local.properties
-local.properties
 *.ps1
 .*.bat
 *.jks
 *.keystore
 *.base64
-docs
+docs
+linux
+windows
+android_original
--- a/.idea/.name
+++ b/.idea/.name
@@ -1 +1 @@
-LBJ Receiver
+LBJ_Console
--- a/README.md
+++ b/README.md
@@ -1,8 +1,20 @@
 # LBJ Console

-LBJ Console is an Android app designed to receive and display LBJ messages via BLE from the [SX1276_Receive_LBJ](https://github.com/undef-i/SX1276_Receive_LBJ) device.
+LBJ Console 是一款 Android 应用程序，用于通过 BLE 从 [SX1276_Receive_LBJ](https://github.com/undef-i/SX1276_Receive_LBJ) 设备接收并显示列车预警消息，功能包括：
+
+- 接收列车预警消息，支持可选的手机推送通知。
+- 在地图上显示预警消息的 GPS 信息。
+- 基于内置数据文件显示机车配属，机车类型和车次类型。


-# License
+## 数据文件

-This project is licensed under the GNU General Public License v3.0 (GPLv3). This license ensures that the software remains free and open source, requiring that any modifications or derivative works must also be released under the same license terms.
+LBJ Console 依赖以下数据文件，位于 `app/src/main/assets/` 目录，用于支持机车配属和车次信息的展示：
+- `loco_info.csv`：包含机车配属信息，格式为 `机车型号,机车编号起始值,机车编号结束值,所属铁路局及机务段,备注`。
+- `loco_type_info.csv`：包含机车类型编码信息，格式为 `机车类型编码,机车类型`。
+- `train_info.csv`：包含车次类型信息，格式为 `正则表达式,车次类型`。
+
+
+# 许可证
+
+该项目采用 GNU 通用公共许可证 v3.0（GPLv3）授权。该许可证确保软件保持免费和开源，要求任何修改或衍生作品也必须在相同许可证条款下发布。
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -2,6 +2,7 @@ plugins {
    alias(libs.plugins.android.application)
    alias(libs.plugins.kotlin.android)
    alias(libs.plugins.kotlin.compose)
+    alias(libs.plugins.ksp)
 }

 android {
@@ -12,8 +13,8 @@ android {
        applicationId = "org.noxylva.lbjconsole"
        minSdk = 29
        targetSdk = 35
-        versionCode = 8
-        versionName = "0.0.8"
+        versionCode = 13
+        versionName = "0.1.3"

        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
    }
@@ -59,6 +60,7 @@ android {
    }
    lint {
        disable += "NullSafeMutableLiveData"
+        warning += "MissingPermission"
    }
 }

@@ -85,4 +87,9 @@ dependencies {
    
    implementation("org.osmdroid:osmdroid-android:6.1.16")
    implementation("org.osmdroid:osmdroid-mapsforge:6.1.16")
+    
+    implementation(libs.androidx.room.runtime)
+    implementation(libs.androidx.room.ktx)
+    ksp(libs.androidx.room.compiler)
+    implementation(libs.androidx.startup.runtime)
 }
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -14,6 +14,7 @@
    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
    <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-feature android:name="android.hardware.bluetooth_le" android:required="true"/>

--- a/app/src/main/assets/loco_type_info.csv
+++ b/app/src/main/assets/loco_type_info.csv
@@ -0,0 +1,142 @@
+001,解放
+003,前进
+005,建设
+006,KD7
+055,蓝箭控车
+081,东风21
+101,东风
+102,东风2
+103,东风3
+104,东风4
+105,东风4客
+106,东风4C
+107,东风5
+108,东风5宽
+109,东风6
+110,东风7
+111,东风8
+112,东风9
+113,东风10
+114,东方红1
+115,东方红2
+116,东方红3
+117,东方红5
+118,北京
+119,北京宽
+120,ND2
+121,ND3
+122,ND4
+123,ND5
+124,NY5
+125,NY6
+126,NY7
+127,轻油
+128,东方红21
+129,东风7B
+130,东风5S
+131,东风7C
+132,东风7S
+133,工矿1
+134,工矿1F
+135,东风4E
+136,东风7D
+137,工矿1A
+138,东风11
+139,天安
+140,东风10F
+141,东风4D
+142,东风8B
+143,东风12
+144,东风7E
+145,NYJ1
+146,NZJ1
+147,NZJ2
+148,东风4DJ
+149,新曙光
+150,神州
+151,NJ2
+152,东风7G
+153,NDJ3
+157,FXN3D
+158,东风11G
+160,HXN3
+161,HXN5
+162,HXN3B
+163,HXN5B
+167,FXN3B
+169,FXN3C
+170,FXN5C
+171,FXN3-J
+201,8G
+202,8K
+203,6G
+204,6K
+205,韶山1
+206,韶山3
+207,韶山4
+208,韶山5
+209,韶山6
+210,韶山3B
+211,韶山7
+212,韶山8
+213,韶山7B
+214,韶山7C
+215,韶山6B
+216,韶山9
+217,韶山7D
+218,DJ熊猫
+219,DJ1
+220,DJ2
+221,DJF
+222,蓝箭动车
+223,先锋号
+224,韶山7E
+225,韶山4G
+226,韶山3C
+228,天梭
+229,DJ4和谐
+230,KTT
+231,HXD1
+232,HXD2
+233,HXD3
+234,HXD1B
+235,HXD2B
+236,HXD3B
+237,HXD1C
+238,HXD2C
+239,HXD3C
+240,HXD1D
+241,HXD2D
+242,HXD3D
+243,FXD1B
+244,FXD2B
+245,FXD1
+246,FXD3
+247,FXD1-J
+248,FXD3-J
+249,KZ25TA
+251,KZ25TB
+252,HXD1D-J
+254,FXD1H
+300,雪域神州
+301,CRH1
+302,CRH2
+303,CRH3
+305,CRH5
+306,CRH380A
+307,CRH380B
+308,CRH380C
+309,CRH380D
+310,CRH6A
+311,CR400AF
+312,CR400BF
+313,CR300AF
+314,CR300BF
+315,CRH2E
+316,CRH6F
+330,CJ1
+331,CJ2
+332,CJ3
+333,CJ4
+334,CJ5
+335,CJ6
--- a/app/src/main/assets/train_number_info.csv
+++ b/app/src/main/assets/train_number_info.csv
@@ -0,0 +1,82 @@
+"^[Gg](4000|[1-3]\d{3}|[1-9]\d{0,2})$","直通图定高速动车组"
+"^[Gg](400[1-9]|40[1-9]\d|4[1-8]\d{2}|49[0-8]\d|499[0-8])$","直通临客高速动车组"
+"^[Gg](9000|[6-8]\d{3}|500[1-9]|50[1-9]\d|5[1-9]\d{2})$","管内图定高速动车组"
+"^[Gg](900[1-9]|90[1-9]\d|9[1-8]\d{2}|99[0-8]\d|999[0-8])$","管内临客高速动车组"
+"^[Cc]([1-8]\d{3}|9000)$","图定城际动车组"
+"^[Cc](900[1-9]|90[1-9]\d|9[1-8]\d{2}|99[0-8]\d|999[0-8])$","临客城际动车组"
+"^[Cc][1-9]\d{2}$","动力集中城际动车组"
+"^[IDid](4000|[1-3]\d{3}|[1-9]\d{0,2})$","直通图定动车组"
+"^[IDid](400[1-9]|40[1-9]\d|4[1-8]\d{2}|49[0-8]\d|499[0-8])$","直通临客动车组"
+"^[IDid](9000|[6-8]\d{3}|500[1-9]|50[1-9]\d|5[1-9]\d{2})$","管内图定动车组"
+"^[IDid](900[1-9]|90[1-9]\d|9[1-8]\d{2}|99[0-8]\d|999[0-8])$","管内临客动车组"
+"^[IDid](8([0-8]\d|9[0-8])|7(0[1-9]|[1-9]\d))$","动力集中动车组"
+"^[IDid](300|[12]\d{2}|[1-9]\d?)$","跨局动力集中动车组"
+"^[PZpz](4000|[1-3]\d{3}|[1-9]\d{0,2})$","直通图定直达特快旅客列车"
+"^[PZpz](400[1-9]|40[1-9]\d|4[1-8]\d{2}|49[0-8]\d|499[0-8])$","直通临客直达特快旅客列车"
+"^[PZpz](9000|[6-8]\d{3}|500[1-9]|50[1-9]\d|5[1-9]\d{2})$","管内图定直达特快旅客列车"
+"^[PZpz](900[1-9]|90[1-9]\d|9[1-8]\d{2}|99[0-8]\d|999[0-8])$","管内临客直达特快旅客列车"
+"^[QTqt](3000|[12]\d{3}|[1-9]\d{0,2})$","直通图定特快旅客列车"
+"^[QTqt](300[1-9]|30[1-9]\d|3[1-8]\d{2}|39[0-8]\d|399[0-8])$","直通临客特快旅客列车"
+"^[QTqt](4(00[1-9]|0[1-9]\d|[1-8]\d{2}|9[0-8]\d|99[0-8]))$","管内临客特快旅客列车"
+"^[QTqt]([5-8]\d{3}|9([0-8]\d{2}|9[0-8]\d|99[0-8])|500[1-9]|50[1-9]\d|5[1-9]\d{2})$","管内图定特快旅客列车"
+"^[WKwk](4000|[1-3]\d{3}|[1-9]\d{0,2})$","直通图定快速旅客列车"
+"^[WKwk](400[1-9]|40[1-9]\d|4[1-8]\d{2}|49[0-8]\d|499[0-8])$","直通临客快速旅客列车"
+"^[WKwk](6([0-8]\d{2}|9[0-8]\d|99[0-8])|500[1-9]|50[1-9]\d|5[1-9]\d{2})$","管内临客快速旅客列车"
+"^[WKwk](8\d{3}|9([0-8]\d{2}|9[0-8]\d|99[0-8])|7(00[1-9]|0[1-9]\d|[1-9]\d{2}))$","管内图定快速旅客列车"
+"^[Vv1](00[1-9]|0[1-9]\d|[1-9]\d{2})$","跨三局及以上图定普通旅客快车"
+"^[Bb2](00[1-9]|0[1-9]\d|[1-9]\d{2})$","跨两局图定普通旅客快车"
+"^3(00[1-9]|0[1-9]\d|[1-9]\d{2})$","跨局临时普通旅客快车"
+"^[Uu4](00[1-9]|0[1-9]\d|[1-9]\d{2})$","管内图定普通旅客快车"
+"^[Xx5](000|1[9][9]|200|3[9][9]|400)$","管内图定普通旅客快车"
+"^6(19[0-8]|1[0-8]\d|0[1-9]\d|00[1-9])$","直通普通旅客慢车"
+"^(6(20[1-9]|2[1-9]\d|[3-9]\d{2})|7([0-4]\d{2}|5([0-8]\d|9[0-8])))$","管内普通旅客慢车"
+"^(8([0-8]\d{2}|9[0-8]\d|99[0-8])|7(60[1-9]|6[1-9]\d|[7-9]\d{2}))$","通勤列车"
+"^[Yy](500|[1-4]\d{2}|[1-9]\d?)$","跨局旅游列车"
+"^[Yy](50[1-9]|5[1-9]\d|[6-9]\d{2})$","管内旅游列车"
+"^[Ss][1-9]\d{0,3}$","市郊旅客列车"
+"^[Ll](6([0-8]\d{2}|9[0-8]\d|99[0-8])|[1-5]\d{3}|[1-9]\d{0,2})$","直通临时旅客列车"
+"^[Ll]([7-9]\d{3})$","管内临时旅客列车"
+"^[Xx](19[0-8]|1[0-8]\d|[1-9]\d?)$","特快货物班列"
+"^[Xx](39[0-8]|3[0-8]\d|2[1-9]\d|20[1-9])$","快速货物班列"
+"^[Xx]2(40[1-9]|4[1-9]\d|[5-9]\d{2})$","直通货物快运列车"
+"^[Xx]([4-9]\d{2}|4[1-9]\d|40[1-9])$","管内货物快运列车"
+"^[Xx]8\d{3}$","中欧中亚集装箱班列"
+"^[Xx]9([0-4]\d{2}|500)$","中亚集装箱班列"
+"^[Xx]9(50[1-9]|5[1-9]\d|[6-9]\d{2})$","水铁联运班列"
+"^[Xx][1-4]\d{4}$","加挂零散快运车辆货物列车"
+"^1(000[1-9]|00[1-9]\d|0[1-9]\d{2}|[1-9]\d{3})$","技术直达列车"
+"^2\d{4}$","直通货物列车"
+"^3\d{4}$","区段摘挂列车"
+"^4([0-3]\d{3}|4([0-8]\d{2}|9[0-8]\d|99[0-8]))$","摘挂列车"
+"^4(500[1-9]|50[1-9]\d|5[1-9]\d{2}|[6-9]\d{3})$","小运转列车"
+"^6\d{4}$","自备列车"
+"^70\d{3}$","超限货物列车"
+"^7([1-6]\d{3}|7([0-8]\d{2}|9[0-8]\d|99[0-8]))$","重载货物列车"
+"^78\d{3}$","保温列车"
+"^8(0\d{3}|1([0-8]\d{2}|9[0-8]\d|99[0-8]))$","普快货物班列"
+"^8(200[1-9]|20[1-9]\d|2[1-9]\d{2}|[34]\d{3})$","煤炭直达列车"
+"^85\d{3}$","石油直达列车"
+"^86\d{3}$","始发直达列车"
+"^87\d{3}$","空车直达列车"
+"^(90\d{3}|91([0-8]\d{2}|9[0-8]\d|99[0-8]))$","军用列车"
+"^50\d{3}$","客车单机"
+"^51\d{3}$","货车单机"
+"^52\d{3}$","小运转单机"
+"^5(3\d{3}|4([0-8]\d{2}|9[0-8]\d|99[0-8]))$","补机列车"
+"^55(300|[0-2]\d{2})$","普通客货试运转列车"
+"^55(500|30[1-9]|3[1-9]\d|4\d{2})$","高速动车组试运转列车"
+"^55(50[1-9]|5[1-9]\d|[6-9]\d{2})$","普通动车组试运转列车"
+"^56\d{3}$","轻油动车与轨道车"
+"^57\d{3}$","路用列车"
+"^58(10[1-9]|1[1-9]\d|[2-8]\d{2}|9([0-8]\d|9[0-8]))$","救援列车"
+"^DJ(400|[1-3]\d{2}|[1-9]\d?)$","动车组检测列车300直通"
+"^DJ([4-9]\d{2}|40[1-9]|4[1-9]\d)$","动车组检测列车300管内"
+"^DJ1(400|[0-3]\d{2})$","动车组检测列车250直通"
+"^DJ1(40[1-9]|4[1-9]\d|[5-9]\d{2})$","动车组检测列车250管内"
+"^DJ[56]\d{3}$","直通动车组确认列车"
+"^DJ[78]\d{3}$","管内动车组确认列车"
+"^[Ff][GDCZTKgdcztk]?\d{1,4}$","因故折返旅客列车"
+"^0[GDCZTKgdcztk]\d{1,4}$","回送图定客车底"
+"^00(100|[1-9]\d?)$","有火回送动车组车底"
+"^00(10[1-9]|1[1-9]\d|2([0-8]\d|9[0-8]))$","无火回送动车组车底"
+"^00(30[1-9]|3[1-9]\d|4([0-8]\d|9[0-8]))$","无火回送普速客车底"
--- a/app/src/main/java/org/noxylva/lbjconsole/BLEClient.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/BLEClient.kt
@@ -534,7 +534,7 @@ class BLEClient(private val context: Context) : BluetoothGattCallback() {
            String(it, StandardCharsets.UTF_8)
        } ?: return

-        Log.d(TAG, "Received data len=${newData.length} preview=${newData.take(50)}")
+        Log.d(TAG, "Received data len=${newData.length} preview=${newData}")


        dataBuffer.append(newData)
@@ -640,7 +640,7 @@ class BLEClient(private val context: Context) : BluetoothGattCallback() {
    private fun processJsonString(jsonStr: String): Boolean {
        try {
            val jsonObject = JSONObject(jsonStr)
-            Log.d(TAG, "Parsed JSON len=${jsonStr.length} preview=${jsonStr.take(50)}")
+            Log.d(TAG, "Parsed JSON len=${jsonStr.length} preview=${jsonStr}")


            handler.post {
--- a/app/src/main/java/org/noxylva/lbjconsole/MainActivity.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/MainActivity.kt
@@ -62,9 +62,12 @@ import org.noxylva.lbjconsole.ui.screens.HistoryScreen

 import org.noxylva.lbjconsole.ui.screens.MapScreen
 import org.noxylva.lbjconsole.ui.screens.SettingsScreen
+import org.noxylva.lbjconsole.ui.screens.CardMapView

 import org.noxylva.lbjconsole.ui.theme.LBJConsoleTheme
 import org.noxylva.lbjconsole.util.LocoInfoUtil
+import org.noxylva.lbjconsole.util.TrainTypeUtil
+import org.noxylva.lbjconsole.database.AppSettingsRepository
 import java.util.*
 import androidx.lifecycle.lifecycleScope
 import android.bluetooth.le.ScanCallback
@@ -75,7 +78,9 @@ class MainActivity : ComponentActivity() {
    private val bleClient by lazy { BLEClient(this) }
    private val trainRecordManager by lazy { TrainRecordManager(this) }
    private val locoInfoUtil by lazy { LocoInfoUtil(this) }
+    private val trainTypeUtil by lazy { TrainTypeUtil(this) }
    private val notificationService by lazy { NotificationService(this) }
+    private val appSettingsRepository by lazy { AppSettingsRepository(this) }
    
    
    private var deviceStatus by mutableStateOf("未连接")
@@ -104,15 +109,14 @@ class MainActivity : ComponentActivity() {
    private var historyExpandedStates by mutableStateOf<Map<String, Boolean>>(emptyMap())
    private var historyScrollPosition by mutableStateOf(0)
    private var historyScrollOffset by mutableStateOf(0)
+    private var historyCardMapStates by mutableStateOf<Map<String, CardMapView>>(emptyMap())
+    private var settingsScrollPosition by mutableStateOf(0)
    private var mapCenterPosition by mutableStateOf<Pair<Double, Double>?>(null)
    private var mapZoomLevel by mutableStateOf(10.0)
    private var mapRailwayLayerVisible by mutableStateOf(true)
    
-    private var settingsScrollPosition by mutableStateOf(0)
-    
    private var mergeSettings by mutableStateOf(MergeSettings())
    
-
    
    private var targetDeviceName = "LBJReceiver"
    private var specifiedDeviceAddress by mutableStateOf<String?>(null)
@@ -120,9 +124,6 @@ class MainActivity : ComponentActivity() {
    private var showDisconnectButton by mutableStateOf(false)
    private var autoConnectEnabled by mutableStateOf(true)
    
-    
-    private val settingsPrefs by lazy { getSharedPreferences("app_settings", Context.MODE_PRIVATE) }
-    
    private fun getAppVersion(): String {
        return try {
            val packageInfo = packageManager.getPackageInfo(packageName, 0)
@@ -182,10 +183,10 @@ class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        
+        TrainRecord.initializeLocoTypeUtil(this)
        
        loadSettings()
        
-        
        val permissions = mutableListOf<String>()
        
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
@@ -196,93 +197,23 @@ class MainActivity : ComponentActivity() {
            ))
        } else {
            permissions.addAll(arrayOf(
-                Manifest.permission.BLUETOOTH,
-                Manifest.permission.BLUETOOTH_ADMIN
+                Manifest.permission.ACCESS_FINE_LOCATION,
+                Manifest.permission.ACCESS_COARSE_LOCATION
            ))
        }
        
-        permissions.addAll(arrayOf(
-            Manifest.permission.ACCESS_FINE_LOCATION,
-            Manifest.permission.ACCESS_COARSE_LOCATION
-        ))
-        
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
-            permissions.add(Manifest.permission.POST_NOTIFICATIONS)
+        if (permissions.isNotEmpty()) {
+            requestPermissions.launch(permissions.toTypedArray())
+        } else {
+            startAutoScanAndConnect()
        }
        
-        requestPermissions.launch(permissions.toTypedArray())
-        
+        Configuration.getInstance().userAgentValue = packageName
        
        bleClient.setTrainInfoCallback { jsonData ->
            handleTrainInfo(jsonData)
        }
        
-        bleClient.setHighFrequencyReconnect(true)
-        bleClient.setConnectionLostCallback {
-            runOnUiThread {
-                deviceStatus = "连接丢失，正在重连..."
-                showDisconnectButton = false
-                if (showConnectionDialog) {
-                    foundDevices = emptyList()
-                    startScan()
-                }
-            }
-        }
-        
-        bleClient.setConnectionSuccessCallback { address ->
-            runOnUiThread {
-                deviceAddress = address
-                deviceStatus = "已连接"
-                showDisconnectButton = true
-                Log.d(TAG, "Connection success callback: address=$address")
-            }
-        }
-        
-        
-        lifecycleScope.launch {
-            try {
-                locoInfoUtil.loadLocoData()
-                Log.d(TAG, "Loaded locomotive data")
-            } catch (e: Exception) {
-                Log.e(TAG, "Load locomotive data failed", e)
-            }
-        }
-        
-        
-        try {
-            
-            val osmCacheDir = File(cacheDir, "osm").apply { mkdirs() }
-            val tileCache = File(osmCacheDir, "tiles").apply { mkdirs() }
-            
-            
-            Configuration.getInstance().apply {
-                userAgentValue = packageName
-                load(this@MainActivity, getSharedPreferences("osmdroid", Context.MODE_PRIVATE))
-                osmdroidBasePath = osmCacheDir
-                osmdroidTileCache = tileCache
-                expirationOverrideDuration = 86400000L * 7 
-                tileDownloadThreads = 4
-                tileFileSystemThreads = 4
-                
-                setUserAgentValue("LBJConsole/1.0")
-            }
-            
-            Log.d(TAG, "OSM cache configured")
-        } catch (e: Exception) {
-            Log.e(TAG, "OSM cache config failed", e)
-        }
-        
-        saveSettings()
-        
-        if (SettingsActivity.isBackgroundServiceEnabled(this)) {
-            BackgroundService.startService(this)
-        }
-        
-        enableEdgeToEdge()
-        
-        WindowCompat.getInsetsController(window, window.decorView).apply {
-            isAppearanceLightStatusBars = false
-        }
        setContent {
            LBJConsoleTheme {
                val scope = rememberCoroutineScope()
@@ -294,6 +225,9 @@ class MainActivity : ComponentActivity() {
                        isScanning = isScanning,
                        currentTab = currentTab,
                        onTabChange = { tab ->
+                            if (currentTab == 2 && tab != 2) {
+                                saveSettings()
+                            }
                            currentTab = tab
                            saveSettings()
                        },
@@ -322,7 +256,6 @@ class MainActivity : ComponentActivity() {
                            Log.d(TAG, "Auto connect enabled: $enabled")
                        },
                        
-                        
                        latestRecord = latestRecord,
                        recentRecords = recentRecords,
                        lastUpdateTime = lastUpdateTime,
@@ -332,10 +265,11 @@ class MainActivity : ComponentActivity() {
                        },
                        onClearMonitorLog = {
                            recentRecords.clear()
+                            latestRecord = null
+                            lastUpdateTime = null
                            temporaryStatusMessage = null
                        },
                        
-                        
                        allRecords = trainRecordManager.getMixedRecords(),
                        mergedRecords = trainRecordManager.getMergedRecords(),
                        recordCount = trainRecordManager.getRecordCount(),
@@ -355,12 +289,14 @@ class MainActivity : ComponentActivity() {
                        historyEditMode = historyEditMode,
                        historySelectedRecords = historySelectedRecords,
                        historyExpandedStates = historyExpandedStates,
+                        historyMapViewStates = historyCardMapStates,
                        historyScrollPosition = historyScrollPosition,
                        historyScrollOffset = historyScrollOffset,
-                        onHistoryStateChange = { editMode, selectedRecords, expandedStates, scrollPosition, scrollOffset ->
+                        onHistoryStateChange = { editMode, selectedRecords, expandedStates, mapStates, scrollPosition, scrollOffset ->
                            historyEditMode = editMode
                            historySelectedRecords = selectedRecords
                            historyExpandedStates = expandedStates
+                            historyCardMapStates = mapStates
                            historyScrollPosition = scrollPosition
                            historyScrollOffset = scrollOffset
                            saveSettings()
@@ -369,6 +305,7 @@ class MainActivity : ComponentActivity() {
                        
                        settingsScrollPosition = settingsScrollPosition,
                        onSettingsScrollPositionChange = { position ->
+                            android.util.Log.d(TAG, "Settings scroll position changed: $position")
                            settingsScrollPosition = position
                            saveSettings()
                        },
@@ -427,6 +364,7 @@ class MainActivity : ComponentActivity() {
                        },
                        appVersion = getAppVersion(),
                        locoInfoUtil = locoInfoUtil,
+                        trainTypeUtil = trainTypeUtil,
                        onOpenSettings = {
                            val intent = Intent(this@MainActivity, SettingsActivity::class.java)
                            startActivity(intent)
@@ -483,7 +421,6 @@ class MainActivity : ComponentActivity() {
                        }
                    }
                    
-
                }
            }
        }
@@ -566,7 +503,7 @@ class MainActivity : ComponentActivity() {
    
    
    private fun handleTrainInfo(jsonData: JSONObject) {
-        Log.d(TAG, "Received train data=${jsonData.toString().take(50)}...")
+        Log.d(TAG, "Received train data=${jsonData.toString()}...")
        
        runOnUiThread {
            try {
@@ -741,89 +678,101 @@ class MainActivity : ComponentActivity() {
    
    
    private fun loadSettings() {
-        settingsDeviceName = settingsPrefs.getString("device_name", "LBJReceiver") ?: "LBJReceiver"
-        targetDeviceName = settingsDeviceName
-        
-        
-        currentTab = settingsPrefs.getInt("current_tab", 0)
-        historyEditMode = settingsPrefs.getBoolean("history_edit_mode", false)
-        
-        val selectedRecordsStr = settingsPrefs.getString("history_selected_records", "")
-        historySelectedRecords = if (selectedRecordsStr.isNullOrEmpty()) {
-            emptySet()
-        } else {
-            selectedRecordsStr.split(",").toSet()
+        lifecycleScope.launch {
+            try {
+                val settings = appSettingsRepository.getSettings()
+                
+                settingsDeviceName = settings.deviceName
+                targetDeviceName = settings.deviceName
+                currentTab = settings.currentTab
+                historyEditMode = settings.historyEditMode
+                
+                historySelectedRecords = if (settings.historySelectedRecords.isEmpty()) {
+                    emptySet()
+                } else {
+                    settings.historySelectedRecords.split(",").toSet()
+                }
+                
+                historyExpandedStates = if (settings.historyExpandedStates.isEmpty()) {
+                    emptyMap()
+                } else {
+                    settings.historyExpandedStates.split(";").mapNotNull { pair ->
+                        val parts = pair.split(":")
+                        if (parts.size == 2) parts[0] to (parts[1] == "true") else null
+                    }.toMap()
+                }
+                
+                historyScrollPosition = settings.historyScrollPosition
+                historyScrollOffset = settings.historyScrollOffset
+                settingsScrollPosition = settings.settingsScrollPosition
+                android.util.Log.d(TAG, "Loaded settings scroll position: $settingsScrollPosition")
+                
+                mapCenterPosition = if (settings.mapCenterLat != null && settings.mapCenterLon != null) {
+                    settings.mapCenterLat.toDouble() to settings.mapCenterLon.toDouble()
+                } else null
+                
+                mapZoomLevel = settings.mapZoomLevel.toDouble()
+                mapRailwayLayerVisible = settings.mapRailwayLayerVisible
+                
+                mergeSettings = trainRecordManager.mergeSettings
+                
+                specifiedDeviceAddress = settings.specifiedDeviceAddress
+                
+                searchOrderList = if (settings.searchOrderList.isEmpty()) {
+                    emptyList()
+                } else {
+                    settings.searchOrderList.split(",").filter { it.isNotBlank() }
+                }
+                
+                autoConnectEnabled = settings.autoConnectEnabled
+                
+                bleClient.setSpecifiedDeviceAddress(specifiedDeviceAddress)
+                
+                Log.d(TAG, "Loaded settings from Room: deviceName=${settingsDeviceName} tab=${currentTab} specifiedDevice=${specifiedDeviceAddress} searchOrder=${searchOrderList.size} autoConnect=${autoConnectEnabled}")
+            } catch (e: Exception) {
+                Log.e(TAG, "Error loading settings from Room", e)
+            }
        }
-        
-        val expandedStatesStr = settingsPrefs.getString("history_expanded_states", "")
-        historyExpandedStates = if (expandedStatesStr.isNullOrEmpty()) {
-            emptyMap()
-        } else {
-            expandedStatesStr.split(";").mapNotNull { pair ->
-                val parts = pair.split(":")
-                if (parts.size == 2) parts[0] to (parts[1] == "true") else null
-            }.toMap()
-        }
-        
-        historyScrollPosition = settingsPrefs.getInt("history_scroll_position", 0)
-        historyScrollOffset = settingsPrefs.getInt("history_scroll_offset", 0)
-        settingsScrollPosition = settingsPrefs.getInt("settings_scroll_position", 0)
-        
-        val centerLat = settingsPrefs.getFloat("map_center_lat", Float.NaN)
-        val centerLon = settingsPrefs.getFloat("map_center_lon", Float.NaN)
-        mapCenterPosition = if (!centerLat.isNaN() && !centerLon.isNaN()) {
-            centerLat.toDouble() to centerLon.toDouble()
-        } else null
-        
-        mapZoomLevel = settingsPrefs.getFloat("map_zoom_level", 10.0f).toDouble()
-        mapRailwayLayerVisible = settingsPrefs.getBoolean("map_railway_visible", true)
-        
-        mergeSettings = trainRecordManager.mergeSettings
-        
-        specifiedDeviceAddress = settingsPrefs.getString("specified_device_address", null)
-        
-        val searchOrderStr = settingsPrefs.getString("search_order_list", "")
-        searchOrderList = if (searchOrderStr.isNullOrEmpty()) {
-            emptyList()
-        } else {
-            searchOrderStr.split(",").filter { it.isNotBlank() }
-        }
-        
-        autoConnectEnabled = settingsPrefs.getBoolean("auto_connect_enabled", true)
-        
-        bleClient.setSpecifiedDeviceAddress(specifiedDeviceAddress)
-        
-        Log.d(TAG, "Loaded settings deviceName=${settingsDeviceName} tab=${currentTab} specifiedDevice=${specifiedDeviceAddress} searchOrder=${searchOrderList.size} autoConnect=${autoConnectEnabled}")
    }
    
    
    private fun saveSettings() {
        lifecycleScope.launch(Dispatchers.IO) {
-            val editor = settingsPrefs.edit()
-                .putString("device_name", settingsDeviceName)
-                .putInt("current_tab", currentTab)
-                .putBoolean("history_edit_mode", historyEditMode)
-                .putString("history_selected_records", historySelectedRecords.joinToString(","))
-                .putString("history_expanded_states", historyExpandedStates.map { "${it.key}:${it.value}" }.joinToString(";"))
-                .putInt("history_scroll_position", historyScrollPosition)
-                .putInt("history_scroll_offset", historyScrollOffset)
-                .putInt("settings_scroll_position", settingsScrollPosition)
-                .putFloat("map_zoom_level", mapZoomLevel.toFloat())
-                .putBoolean("map_railway_visible", mapRailwayLayerVisible)
-                .putString("specified_device_address", specifiedDeviceAddress)
-                .putString("search_order_list", searchOrderList.joinToString(","))
-                .putBoolean("auto_connect_enabled", autoConnectEnabled)
+            try {
+                val currentSettings = appSettingsRepository.getSettings()
+                val updatedSettings = currentSettings.copy(
+                    deviceName = settingsDeviceName,
+                    currentTab = currentTab,
+                    historyEditMode = historyEditMode,
+                    historySelectedRecords = historySelectedRecords.joinToString(","),
+                    historyExpandedStates = historyExpandedStates.map { "${it.key}:${it.value}" }.joinToString(";"),
+                    historyScrollPosition = historyScrollPosition,
+                    historyScrollOffset = historyScrollOffset,
+                    settingsScrollPosition = settingsScrollPosition,
+                    mapCenterLat = mapCenterPosition?.first?.toFloat(),
+                    mapCenterLon = mapCenterPosition?.second?.toFloat(),
+                    mapZoomLevel = mapZoomLevel.toFloat(),
+                    mapRailwayLayerVisible = mapRailwayLayerVisible,
+                    specifiedDeviceAddress = specifiedDeviceAddress,
+                    searchOrderList = searchOrderList.joinToString(","),
+                    autoConnectEnabled = autoConnectEnabled
+                )
                
-            mapCenterPosition?.let { (lat, lon) ->
-                editor.putFloat("map_center_lat", lat.toFloat())
-                editor.putFloat("map_center_lon", lon.toFloat())
+                appSettingsRepository.saveSettings(updatedSettings)
+                Log.d(TAG, "Saved settings to Room: deviceName=${settingsDeviceName} tab=${currentTab} settingsScrollPosition=${settingsScrollPosition} mapCenter=${mapCenterPosition} zoom=${mapZoomLevel}")
+            } catch (e: Exception) {
+                Log.e(TAG, "Error saving settings to Room", e)
            }
-            
-            editor.apply()
-            Log.d(TAG, "Saved settings deviceName=${settingsDeviceName} tab=${currentTab} mapCenter=${mapCenterPosition} zoom=${mapZoomLevel}")
        }
    }
    
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        Log.d(TAG, "onNewIntent called")
+        currentTab = 0
+        forceUiRefresh()
+    }
+
    override fun onResume() {
        super.onResume()
        Log.d(TAG, "App resumed")
@@ -909,14 +858,16 @@ fun MainContent(

    
    locoInfoUtil: LocoInfoUtil,
+    trainTypeUtil: TrainTypeUtil,
    
    
    historyEditMode: Boolean,
    historySelectedRecords: Set<String>,
    historyExpandedStates: Map<String, Boolean>,
+    historyMapViewStates: Map<String, CardMapView>,
    historyScrollPosition: Int,
    historyScrollOffset: Int,
-    onHistoryStateChange: (Boolean, Set<String>, Map<String, Boolean>, Int, Int) -> Unit,
+    onHistoryStateChange: (Boolean, Set<String>, Map<String, Boolean>, Map<String, CardMapView>, Int, Int) -> Unit,
    
    
    settingsScrollPosition: Int,
@@ -1022,7 +973,7 @@ fun MainContent(
                        },
                        navigationIcon = {
                            IconButton(onClick = {
-                                onHistoryStateChange(false, emptySet(), historyExpandedStates, historyScrollPosition, historyScrollOffset)
+                                onHistoryStateChange(false, emptySet(), historyExpandedStates, historyMapViewStates, historyScrollPosition, historyScrollOffset)
                            }) {
                                Icon(
                                    imageVector = Icons.Default.Close,
@@ -1068,7 +1019,7 @@ fun MainContent(
                        }
                                        
                                        onDeleteRecords(recordsToDelete.toList())
-                                        onHistoryStateChange(false, emptySet(), historyExpandedStates, historyScrollPosition, historyScrollOffset)
+                                        onHistoryStateChange(false, emptySet(), historyExpandedStates, historyMapViewStates, historyScrollPosition, historyScrollOffset)
                                    }
                                }
                            ) {
@@ -1124,6 +1075,7 @@ fun MainContent(
                        lastUpdateTime = lastUpdateTime,
                        temporaryStatusMessage = temporaryStatusMessage,
                        locoInfoUtil = locoInfoUtil,
+                        trainTypeUtil = trainTypeUtil,
                        mergeSettings = mergeSettings,
                        onClearRecords = onClearRecords,
                        onRecordClick = onRecordClick,
@@ -1132,6 +1084,7 @@ fun MainContent(
                        editMode = historyEditMode,
                        selectedRecords = historySelectedRecords,
                        expandedStates = historyExpandedStates,
+                        mapViewStates = historyMapViewStates,
                        scrollPosition = historyScrollPosition,
                        scrollOffset = historyScrollOffset,
                        onStateChange = onHistoryStateChange
--- a/app/src/main/java/org/noxylva/lbjconsole/NotificationService.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/NotificationService.kt
@@ -5,7 +5,9 @@ import android.app.NotificationManager
 import android.app.PendingIntent
 import android.content.Context
 import android.content.Intent
-import android.content.SharedPreferences
+import kotlinx.coroutines.runBlocking
+import org.noxylva.lbjconsole.database.AppSettingsRepository
+import org.noxylva.lbjconsole.database.TrainDatabase
 import android.os.Build
 import android.util.Log
 import android.view.View
@@ -27,7 +29,7 @@ class NotificationService(private val context: Context) {
    }

    private val notificationManager = NotificationManagerCompat.from(context)
-    private val prefs: SharedPreferences = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+    private val appSettingsRepository = AppSettingsRepository(context)
    private var notificationIdCounter = NOTIFICATION_ID_BASE

    init {
@@ -53,11 +55,15 @@ class NotificationService(private val context: Context) {
    }

    fun isNotificationEnabled(): Boolean {
-        return prefs.getBoolean(KEY_ENABLED, false)
+        return runBlocking {
+            appSettingsRepository.getSettings().notificationEnabled
+        }
    }

    fun setNotificationEnabled(enabled: Boolean) {
-        prefs.edit().putBoolean(KEY_ENABLED, enabled).apply()
+        runBlocking {
+            appSettingsRepository.updateNotificationEnabled(enabled)
+        }
        Log.d(TAG, "Notification enabled set to: $enabled")
    }

@@ -139,7 +145,7 @@ class NotificationService(private val context: Context) {
            }
            
            if (isValidValue(trainRecord.position)) {
-                remoteViews.setTextViewText(R.id.notification_position, "${trainRecord.position.trim()}K")
+                remoteViews.setTextViewText(R.id.notification_position, "${trainRecord.position.trim().removeSuffix(".")}K")
                remoteViews.setViewVisibility(R.id.notification_position, View.VISIBLE)
            } else {
                remoteViews.setViewVisibility(R.id.notification_position, View.GONE)
--- a/app/src/main/java/org/noxylva/lbjconsole/SettingsActivity.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/SettingsActivity.kt
@@ -1,30 +1,29 @@
 package org.noxylva.lbjconsole

 import android.content.Context
-import android.content.SharedPreferences
 import android.os.Bundle
 import android.widget.Switch
 import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.launch
+import org.noxylva.lbjconsole.database.AppSettingsRepository

 class SettingsActivity : AppCompatActivity() {
    
    companion object {
-        private const val PREFS_NAME = "lbj_console_settings"
-        private const val KEY_BACKGROUND_SERVICE = "background_service_enabled"
-        
-        fun isBackgroundServiceEnabled(context: Context): Boolean {
-            val prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
-            return prefs.getBoolean(KEY_BACKGROUND_SERVICE, false)
+        suspend fun isBackgroundServiceEnabled(context: Context): Boolean {
+            val repository = AppSettingsRepository(context)
+            return repository.getSettings().backgroundServiceEnabled
        }
        
-        fun setBackgroundServiceEnabled(context: Context, enabled: Boolean) {
-            val prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
-            prefs.edit().putBoolean(KEY_BACKGROUND_SERVICE, enabled).apply()
+        suspend fun setBackgroundServiceEnabled(context: Context, enabled: Boolean) {
+            val repository = AppSettingsRepository(context)
+            repository.updateBackgroundServiceEnabled(enabled)
        }
    }
    
    private lateinit var backgroundServiceSwitch: Switch
-    private lateinit var prefs: SharedPreferences
+    private lateinit var appSettingsRepository: AppSettingsRepository
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
@@ -33,7 +32,7 @@ class SettingsActivity : AppCompatActivity() {
        supportActionBar?.setDisplayHomeAsUpEnabled(true)
        supportActionBar?.title = "Settings"
        
-        prefs = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+        appSettingsRepository = AppSettingsRepository(this)
        
        initViews()
        setupListeners()
@@ -41,12 +40,16 @@ class SettingsActivity : AppCompatActivity() {
    
    private fun initViews() {
        backgroundServiceSwitch = findViewById(R.id.switch_background_service)
-        backgroundServiceSwitch.isChecked = isBackgroundServiceEnabled(this)
+        lifecycleScope.launch {
+            backgroundServiceSwitch.isChecked = isBackgroundServiceEnabled(this@SettingsActivity)
+        }
    }
    
    private fun setupListeners() {
        backgroundServiceSwitch.setOnCheckedChangeListener { _, isChecked ->
-            setBackgroundServiceEnabled(this, isChecked)
+            lifecycleScope.launch {
+                setBackgroundServiceEnabled(this@SettingsActivity, isChecked)
+            }
            
            if (isChecked) {
                BackgroundService.startService(this)
--- a/app/src/main/java/org/noxylva/lbjconsole/database/AppSettingsDao.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/database/AppSettingsDao.kt
@@ -0,0 +1,31 @@
+package org.noxylva.lbjconsole.database
+
+import androidx.room.*
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface AppSettingsDao {
+    
+    @Query("SELECT * FROM app_settings WHERE id = 1")
+    suspend fun getSettings(): AppSettingsEntity?
+    
+    @Query("SELECT * FROM app_settings WHERE id = 1")
+    fun getSettingsFlow(): Flow<AppSettingsEntity?>
+    
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertSettings(settings: AppSettingsEntity)
+    
+    @Update
+    suspend fun updateSettings(settings: AppSettingsEntity)
+    
+    @Query("DELETE FROM app_settings")
+    suspend fun deleteAllSettings()
+    
+    @Query("UPDATE app_settings SET notificationEnabled = :enabled WHERE id = 1")
+    suspend fun updateNotificationEnabled(enabled: Boolean)
+    
+    @Transaction
+    suspend fun saveSettings(settings: AppSettingsEntity) {
+        insertSettings(settings)
+    }
+}
--- a/app/src/main/java/org/noxylva/lbjconsole/database/AppSettingsEntity.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/database/AppSettingsEntity.kt
@@ -0,0 +1,26 @@
+package org.noxylva.lbjconsole.database
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "app_settings")
+data class AppSettingsEntity(
+    @PrimaryKey val id: Int = 1,
+    val deviceName: String = "LBJReceiver",
+    val currentTab: Int = 0,
+    val historyEditMode: Boolean = false,
+    val historySelectedRecords: String = "",
+    val historyExpandedStates: String = "",
+    val historyScrollPosition: Int = 0,
+    val historyScrollOffset: Int = 0,
+    val settingsScrollPosition: Int = 0,
+    val mapCenterLat: Float? = null,
+    val mapCenterLon: Float? = null,
+    val mapZoomLevel: Float = 10.0f,
+    val mapRailwayLayerVisible: Boolean = true,
+    val specifiedDeviceAddress: String? = null,
+    val searchOrderList: String = "",
+    val autoConnectEnabled: Boolean = true,
+    val backgroundServiceEnabled: Boolean = false,
+    val notificationEnabled: Boolean = false
+)
--- a/app/src/main/java/org/noxylva/lbjconsole/database/AppSettingsRepository.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/database/AppSettingsRepository.kt
@@ -0,0 +1,127 @@
+package org.noxylva.lbjconsole.database
+
+import android.content.Context
+import android.content.SharedPreferences
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.first
+
+class AppSettingsRepository(private val context: Context) {
+    private val dao = TrainDatabase.getDatabase(context).appSettingsDao()
+    private val sharedPrefs: SharedPreferences = context.getSharedPreferences("settings", Context.MODE_PRIVATE)
+    
+    suspend fun getSettings(): AppSettingsEntity {
+        var settings = dao.getSettings()
+        
+        if (settings == null) {
+            settings = migrateFromSharedPreferences()
+            dao.saveSettings(settings)
+        }
+        
+        return settings
+    }
+    
+    fun getSettingsFlow(): Flow<AppSettingsEntity?> {
+        return dao.getSettingsFlow()
+    }
+    
+    suspend fun saveSettings(settings: AppSettingsEntity) {
+        dao.saveSettings(settings)
+    }
+    
+    suspend fun updateDeviceName(deviceName: String) {
+        val current = getSettings()
+        saveSettings(current.copy(deviceName = deviceName))
+    }
+    
+    suspend fun updateCurrentTab(tab: Int) {
+        val current = getSettings()
+        saveSettings(current.copy(currentTab = tab))
+    }
+    
+    suspend fun updateHistoryEditMode(editMode: Boolean) {
+        val current = getSettings()
+        saveSettings(current.copy(historyEditMode = editMode))
+    }
+    
+    suspend fun updateHistorySelectedRecords(selectedRecords: String) {
+        val current = getSettings()
+        saveSettings(current.copy(historySelectedRecords = selectedRecords))
+    }
+    
+    suspend fun updateHistoryExpandedStates(expandedStates: String) {
+        val current = getSettings()
+        saveSettings(current.copy(historyExpandedStates = expandedStates))
+    }
+    
+    suspend fun updateHistoryScrollPosition(position: Int, offset: Int = 0) {
+        val current = getSettings()
+        saveSettings(current.copy(historyScrollPosition = position, historyScrollOffset = offset))
+    }
+    
+    suspend fun updateSettingsScrollPosition(position: Int) {
+        val current = getSettings()
+        saveSettings(current.copy(settingsScrollPosition = position))
+    }
+    
+    suspend fun updateMapSettings(centerLat: Float?, centerLon: Float?, zoomLevel: Float, railwayLayerVisible: Boolean) {
+        val current = getSettings()
+        saveSettings(current.copy(
+            mapCenterLat = centerLat,
+            mapCenterLon = centerLon,
+            mapZoomLevel = zoomLevel,
+            mapRailwayLayerVisible = railwayLayerVisible
+        ))
+    }
+    
+    suspend fun updateSpecifiedDeviceAddress(address: String?) {
+        val current = getSettings()
+        saveSettings(current.copy(specifiedDeviceAddress = address))
+    }
+    
+    suspend fun updateSearchOrderList(orderList: String) {
+        val current = getSettings()
+        saveSettings(current.copy(searchOrderList = orderList))
+    }
+    
+    suspend fun updateAutoConnectEnabled(enabled: Boolean) {
+        val current = getSettings()
+        saveSettings(current.copy(autoConnectEnabled = enabled))
+    }
+    
+    suspend fun updateBackgroundServiceEnabled(enabled: Boolean) {
+        val current = getSettings()
+        saveSettings(current.copy(backgroundServiceEnabled = enabled))
+    }
+    
+    suspend fun updateNotificationEnabled(enabled: Boolean) {
+        val current = getSettings()
+        saveSettings(current.copy(notificationEnabled = enabled))
+    }
+    
+    private fun migrateFromSharedPreferences(): AppSettingsEntity {
+        return AppSettingsEntity(
+            deviceName = sharedPrefs.getString("device_name", "LBJReceiver") ?: "LBJReceiver",
+            currentTab = sharedPrefs.getInt("current_tab", 0),
+            historyEditMode = sharedPrefs.getBoolean("history_edit_mode", false),
+            historySelectedRecords = sharedPrefs.getString("history_selected_records", "") ?: "",
+            historyExpandedStates = sharedPrefs.getString("history_expanded_states", "") ?: "",
+            historyScrollPosition = sharedPrefs.getInt("history_scroll_position", 0),
+            historyScrollOffset = sharedPrefs.getInt("history_scroll_offset", 0),
+            settingsScrollPosition = sharedPrefs.getInt("settings_scroll_position", 0),
+            mapCenterLat = if (sharedPrefs.contains("map_center_lat")) sharedPrefs.getFloat("map_center_lat", 0f) else null,
+            mapCenterLon = if (sharedPrefs.contains("map_center_lon")) sharedPrefs.getFloat("map_center_lon", 0f) else null,
+            mapZoomLevel = sharedPrefs.getFloat("map_zoom_level", 10.0f),
+            mapRailwayLayerVisible = sharedPrefs.getBoolean("map_railway_layer_visible", true),
+            specifiedDeviceAddress = sharedPrefs.getString("specified_device_address", null),
+            searchOrderList = sharedPrefs.getString("search_order_list", "") ?: "",
+            autoConnectEnabled = sharedPrefs.getBoolean("auto_connect_enabled", true),
+            backgroundServiceEnabled = sharedPrefs.getBoolean("background_service_enabled", false),
+            notificationEnabled = context.getSharedPreferences("notification_settings", Context.MODE_PRIVATE)
+                .getBoolean("notifications_enabled", false)
+        )
+    }
+    
+    suspend fun clearSharedPreferences() {
+        sharedPrefs.edit().clear().apply()
+    }
+}
--- a/app/src/main/java/org/noxylva/lbjconsole/database/TrainDatabase.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/database/TrainDatabase.kt
@@ -0,0 +1,145 @@
+package org.noxylva.lbjconsole.database
+
+import android.content.Context
+import androidx.room.Database
+import androidx.room.Room
+import androidx.room.RoomDatabase
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+@Database(
+    entities = [TrainRecordEntity::class, AppSettingsEntity::class],
+    version = 4,
+    exportSchema = false
+)
+abstract class TrainDatabase : RoomDatabase() {
+    
+    abstract fun trainRecordDao(): TrainRecordDao
+    abstract fun appSettingsDao(): AppSettingsDao
+    
+    companion object {
+        @Volatile
+        private var INSTANCE: TrainDatabase? = null
+        
+        private val MIGRATION_1_2 = object : Migration(1, 2) {
+            override fun migrate(database: SupportSQLiteDatabase) {
+                database.execSQL("""
+                    CREATE TABLE IF NOT EXISTS `app_settings` (
+                        `id` INTEGER NOT NULL,
+                        `deviceName` TEXT NOT NULL,
+                        `currentTab` INTEGER NOT NULL,
+                        `historyEditMode` INTEGER NOT NULL,
+                        `historySelectedRecords` TEXT NOT NULL,
+                        `historyExpandedStates` TEXT NOT NULL,
+                        `historyScrollPosition` INTEGER NOT NULL,
+                        `historyScrollOffset` INTEGER NOT NULL,
+                        `settingsScrollPosition` INTEGER NOT NULL,
+                        `mapCenterLat` REAL,
+                        `mapCenterLon` REAL,
+                        `mapZoomLevel` REAL NOT NULL,
+                        `mapRailwayLayerVisible` INTEGER NOT NULL,
+                        `specifiedDeviceAddress` TEXT,
+                        `searchOrderList` TEXT NOT NULL,
+                        `autoConnectEnabled` INTEGER NOT NULL,
+                        `backgroundServiceEnabled` INTEGER NOT NULL,
+                        PRIMARY KEY(`id`)
+                    )
+                """)
+            }
+        }
+        
+        val MIGRATION_2_3 = object : Migration(2, 3) {
+            override fun migrate(database: SupportSQLiteDatabase) {
+                database.execSQL("ALTER TABLE app_settings ADD COLUMN notificationEnabled INTEGER NOT NULL DEFAULT 0")
+            }
+        }
+        
+        val MIGRATION_3_4 = object : Migration(3, 4) {
+            override fun migrate(database: SupportSQLiteDatabase) {
+                // Since we can't determine the exact schema change, we'll use fallback migration
+                // This will preserve data where possible while updating the schema
+                
+                // Create new table with correct schema
+                database.execSQL("""
+                    CREATE TABLE IF NOT EXISTS `app_settings_new` (
+                        `id` INTEGER NOT NULL,
+                        `deviceName` TEXT NOT NULL DEFAULT 'LBJReceiver',
+                        `currentTab` INTEGER NOT NULL DEFAULT 0,
+                        `historyEditMode` INTEGER NOT NULL DEFAULT 0,
+                        `historySelectedRecords` TEXT NOT NULL DEFAULT '',
+                        `historyExpandedStates` TEXT NOT NULL DEFAULT '',
+                        `historyScrollPosition` INTEGER NOT NULL DEFAULT 0,
+                        `historyScrollOffset` INTEGER NOT NULL DEFAULT 0,
+                        `settingsScrollPosition` INTEGER NOT NULL DEFAULT 0,
+                        `mapCenterLat` REAL,
+                        `mapCenterLon` REAL,
+                        `mapZoomLevel` REAL NOT NULL DEFAULT 10.0,
+                        `mapRailwayLayerVisible` INTEGER NOT NULL DEFAULT 1,
+                        `specifiedDeviceAddress` TEXT,
+                        `searchOrderList` TEXT NOT NULL DEFAULT '',
+                        `autoConnectEnabled` INTEGER NOT NULL DEFAULT 1,
+                        `backgroundServiceEnabled` INTEGER NOT NULL DEFAULT 0,
+                        `notificationEnabled` INTEGER NOT NULL DEFAULT 0,
+                        PRIMARY KEY(`id`)
+                    )
+                """)
+                
+                // Copy data from old table to new table, handling missing columns
+                try {
+                    database.execSQL("""
+                        INSERT INTO `app_settings_new` (
+                            id, deviceName, currentTab, historyEditMode, historySelectedRecords,
+                            historyExpandedStates, historyScrollPosition, historyScrollOffset,
+                            settingsScrollPosition, mapCenterLat, mapCenterLon, mapZoomLevel,
+                            mapRailwayLayerVisible
+                        )
+                        SELECT 
+                            COALESCE(id, 1),
+                            COALESCE(deviceName, 'LBJReceiver'),
+                            COALESCE(currentTab, 0),
+                            COALESCE(historyEditMode, 0),
+                            COALESCE(historySelectedRecords, ''),
+                            COALESCE(historyExpandedStates, ''),
+                            COALESCE(historyScrollPosition, 0),
+                            COALESCE(historyScrollOffset, 0),
+                            COALESCE(settingsScrollPosition, 0),
+                            mapCenterLat,
+                            mapCenterLon,
+                            COALESCE(mapZoomLevel, 10.0),
+                            COALESCE(mapRailwayLayerVisible, 1)
+                        FROM `app_settings`
+                    """)
+                } catch (e: Exception) {
+                    // If the old table doesn't exist or has different structure, insert default
+                    database.execSQL("""
+                        INSERT INTO `app_settings_new` (
+                            id, deviceName, currentTab, historyEditMode, historySelectedRecords,
+                            historyExpandedStates, historyScrollPosition, historyScrollOffset,
+                            settingsScrollPosition, mapZoomLevel, mapRailwayLayerVisible,
+                            searchOrderList, autoConnectEnabled, backgroundServiceEnabled,
+                            notificationEnabled
+                        ) VALUES (
+                            1, 'LBJReceiver', 0, 0, '', '', 0, 0, 0, 10.0, 1, '', 1, 0, 0
+                        )
+                    """)
+                }
+                
+                // Drop old table and rename new table
+                database.execSQL("DROP TABLE IF EXISTS `app_settings`")
+                database.execSQL("ALTER TABLE `app_settings_new` RENAME TO `app_settings`")
+            }
+        }
+        
+        fun getDatabase(context: Context): TrainDatabase {
+            return INSTANCE ?: synchronized(this) {
+                val instance = Room.databaseBuilder(
+                    context.applicationContext,
+                    TrainDatabase::class.java,
+                    "train_database"
+                ).addMigrations(MIGRATION_1_2, MIGRATION_2_3, MIGRATION_3_4).build()
+                INSTANCE = instance
+                instance
+            }
+        }
+    }
+}
--- a/app/src/main/java/org/noxylva/lbjconsole/database/TrainRecordDao.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/database/TrainRecordDao.kt
@@ -0,0 +1,50 @@
+package org.noxylva.lbjconsole.database
+
+import androidx.room.*
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface TrainRecordDao {
+    
+    @Query("SELECT * FROM train_records ORDER BY timestamp DESC")
+    suspend fun getAllRecords(): List<TrainRecordEntity>
+    
+    @Query("SELECT * FROM train_records ORDER BY timestamp DESC")
+    fun getAllRecordsFlow(): Flow<List<TrainRecordEntity>>
+    
+    @Query("SELECT * FROM train_records WHERE uniqueId = :uniqueId")
+    suspend fun getRecordById(uniqueId: String): TrainRecordEntity?
+    
+    @Query("SELECT COUNT(*) FROM train_records")
+    suspend fun getRecordCount(): Int
+    
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertRecord(record: TrainRecordEntity)
+    
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertRecords(records: List<TrainRecordEntity>)
+    
+    @Delete
+    suspend fun deleteRecord(record: TrainRecordEntity)
+    
+    @Delete
+    suspend fun deleteRecords(records: List<TrainRecordEntity>)
+    
+    @Query("DELETE FROM train_records")
+    suspend fun deleteAllRecords()
+    
+    @Query("DELETE FROM train_records WHERE uniqueId = :uniqueId")
+    suspend fun deleteRecordById(uniqueId: String)
+    
+    @Query("DELETE FROM train_records WHERE uniqueId IN (:uniqueIds)")
+    suspend fun deleteRecordsByIds(uniqueIds: List<String>)
+    
+    @Query("SELECT * FROM train_records WHERE train LIKE '%' || :train || '%' AND route LIKE '%' || :route || '%' AND (:direction = '全部' OR (:direction = '上行' AND direction = 3) OR (:direction = '下行' AND direction = 1)) ORDER BY timestamp DESC")
+    suspend fun getFilteredRecords(train: String, route: String, direction: String): List<TrainRecordEntity>
+    
+    @Query("SELECT * FROM train_records ORDER BY timestamp DESC LIMIT :limit")
+    suspend fun getLatestRecords(limit: Int): List<TrainRecordEntity>
+    
+    @Query("SELECT * FROM train_records WHERE timestamp >= :fromTime ORDER BY timestamp DESC")
+    suspend fun getRecordsFromTime(fromTime: Long): List<TrainRecordEntity>
+}
--- a/app/src/main/java/org/noxylva/lbjconsole/database/TrainRecordEntity.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/database/TrainRecordEntity.kt
@@ -0,0 +1,66 @@
+package org.noxylva.lbjconsole.database
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import org.noxylva.lbjconsole.model.TrainRecord
+import org.json.JSONObject
+import java.util.*
+
+@Entity(tableName = "train_records")
+data class TrainRecordEntity(
+    @PrimaryKey val uniqueId: String,
+    val timestamp: Long,
+    val receivedTimestamp: Long,
+    val train: String,
+    val direction: Int,
+    val speed: String,
+    val position: String,
+    val time: String,
+    val loco: String,
+    val locoType: String,
+    val lbjClass: String,
+    val route: String,
+    val positionInfo: String,
+    val rssi: Double
+) {
+    fun toTrainRecord(): TrainRecord {
+        val jsonData = JSONObject().apply {
+            put("uniqueId", uniqueId)
+            put("timestamp", timestamp)
+            put("receivedTimestamp", receivedTimestamp)
+            put("train", train)
+            put("dir", direction)
+            put("speed", speed)
+            put("pos", position)
+            put("time", time)
+            put("loco", loco)
+            put("loco_type", locoType)
+            put("lbj_class", lbjClass)
+            put("route", route)
+            put("position_info", positionInfo)
+            put("rssi", rssi)
+        }
+        return TrainRecord(jsonData)
+    }
+    
+    companion object {
+        fun fromTrainRecord(record: TrainRecord): TrainRecordEntity {
+            return TrainRecordEntity(
+                uniqueId = record.uniqueId,
+                timestamp = record.timestamp.time,
+                receivedTimestamp = record.receivedTimestamp.time,
+                train = record.train,
+                direction = record.direction,
+                speed = record.speed,
+                position = record.position,
+                time = record.time,
+                loco = record.loco,
+                locoType = record.locoType,
+                lbjClass = record.lbjClass,
+                route = record.route,
+                positionInfo = record.positionInfo,
+                rssi = record.rssi
+            )
+        }
+    }
+}
--- a/app/src/main/java/org/noxylva/lbjconsole/model/TrainRecord.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/model/TrainRecord.kt
@@ -1,20 +1,29 @@
 package org.noxylva.lbjconsole.model

+import android.content.Context
 import android.util.Log
 import org.json.JSONObject
 import java.util.*
 import org.osmdroid.util.GeoPoint
-import org.noxylva.lbjconsole.util.LocationUtils
+import org.noxylva.lbjconsole.util.LocationUtil
+import org.noxylva.lbjconsole.util.LocoTypeUtil

 class TrainRecord(jsonData: JSONObject? = null) {
    companion object {
        const val TAG = "TrainRecord"
        private var nextId = 0L
+        private var LocoTypeUtil: LocoTypeUtil? = null
        
        @Synchronized
        private fun generateUniqueId(): String {
            return "${System.currentTimeMillis()}_${++nextId}"
        }
+        
+        fun initializeLocoTypeUtil(context: Context) {
+            if (LocoTypeUtil == null) {
+                LocoTypeUtil = LocoTypeUtil(context)
+            }
+        }
    }
    
    val uniqueId: String
@@ -75,20 +84,25 @@ class TrainRecord(jsonData: JSONObject? = null) {
            position = jsonData.optString("pos", "")
            time = jsonData.optString("time", "")
            loco = jsonData.optString("loco", "")
-            locoType = jsonData.optString("loco_type", "")
+            
+            locoType = if (loco.isNotEmpty()) {
+                val prefix = if (loco.length >= 3) loco.take(3) else loco
+                LocoTypeUtil?.getLocoTypeByCode(prefix) ?: ""
+            } else {
+                ""
+            }
+            
            lbjClass = jsonData.optString("lbj_class", "")
            route = jsonData.optString("route", "")
            positionInfo = jsonData.optString("position_info", "")
            rssi = jsonData.optDouble("rssi", 0.0)
            
-            
            _coordinates = null
            
-            Log.d(TAG, "Successfully parsed: train=$train, dir=$direction, speed=$speed")
+            Log.d(TAG, "Successfully parsed: train=$train, dir=$direction, speed=$speed, lbjClass='$lbjClass', locoType='$locoType'")
        } catch (e: Exception) {
            Log.e(TAG, "JSON parse error: ${e.message}", e)
            
-            
            try { train = jsonData.optString("train", "") } catch (e: Exception) { }
            try { direction = jsonData.optInt("dir", 0) } catch (e: Exception) { }
            try { speed = jsonData.optString("speed", "") } catch (e: Exception) { }
@@ -107,7 +121,7 @@ class TrainRecord(jsonData: JSONObject? = null) {
        }
        
        
-        _coordinates = LocationUtils.parsePositionInfo(positionInfo)
+        _coordinates = LocationUtil.parsePositionInfo(positionInfo)
        return _coordinates
    }
    private fun isValidValue(value: String): Boolean {
@@ -134,7 +148,7 @@ class TrainRecord(jsonData: JSONObject? = null) {
            lbjClass.trim()
        } else if (isValidValue(train)) {
            train.trim()
-        } else ""
+        } else null
        
        val map = mutableMapOf<String, String>()
        
@@ -143,14 +157,17 @@ class TrainRecord(jsonData: JSONObject? = null) {
        map["receivedTimestamp"] = dateFormat.format(receivedTimestamp)
        
        
-        if (trainDisplay.isNotEmpty()) map["train"] = trainDisplay
+        trainDisplay?.takeIf { it.isNotEmpty() }?.let { map["train"] = it }
+        
        if (directionText != "未知") map["direction"] = directionText
-        if (isValidValue(speed)) map["speed"] = "速度: ${speed.trim()} km/h"
-        if (isValidValue(position)) map["position"] = "位置: ${position.trim()} km"
+        if (isValidValue(speed)) map["speed"] = "${speed.trim()} km/h"
+        if (isValidValue(position)) {
+            map["position"] = "${position.trim().removeSuffix(".")} K"
+        }
        val timeToDisplay = if (showDetailedTime) {
            val dateFormat = java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss", java.util.Locale.getDefault())
            if (isValidValue(time)) {
-                "列车时间: $time\n接收时间: ${dateFormat.format(receivedTimestamp)}"
+                "$time\n${dateFormat.format(receivedTimestamp)}"
            } else {
                dateFormat.format(receivedTimestamp)
            }
@@ -164,13 +181,13 @@ class TrainRecord(jsonData: JSONObject? = null) {
            }
        }
        map["time"] = timeToDisplay
-        if (isValidValue(loco)) map["loco"] = "机车号: ${loco.trim()}"
-        if (isValidValue(locoType)) map["loco_type"] = "型号: ${locoType.trim()}"
-        if (isValidValue(route)) map["route"] = "线路: ${route.trim()}"
+        if (isValidValue(loco)) map["loco"] = "${loco.trim()}"
+        if (isValidValue(locoType)) map["loco_type"] = "${locoType.trim()}"
+        if (isValidValue(route)) map["route"] = "${route.trim()}"
        if (isValidValue(positionInfo) && !positionInfo.trim().matches(Regex(".*(<NUL>|\\s)*.*"))) {
-            map["position_info"] = "位置信息: ${positionInfo.trim()}"
+            map["position_info"] = "${positionInfo.trim()}"
        }
-        if (rssi != 0.0) map["rssi"] = "信号强度: $rssi dBm"
+        if (rssi != 0.0) map["rssi"] = "$rssi dBm"
        
        return map
    }
--- a/app/src/main/java/org/noxylva/lbjconsole/model/TrainRecordManager.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/model/TrainRecordManager.kt
@@ -7,6 +7,8 @@ import android.util.Log
 import kotlinx.coroutines.*
 import org.json.JSONArray
 import org.json.JSONObject
+import org.noxylva.lbjconsole.database.TrainDatabase
+import org.noxylva.lbjconsole.database.TrainRecordEntity
 import java.io.File
 import java.io.FileWriter
 import java.text.SimpleDateFormat
@@ -27,6 +29,8 @@ class TrainRecordManager(private val context: Context) {
    private val trainRecords = CopyOnWriteArrayList<TrainRecord>()
    private val recordCount = AtomicInteger(0)
    private val prefs: SharedPreferences = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+    private val database = TrainDatabase.getDatabase(context)
+    private val trainRecordDao = database.trainRecordDao()
    private val ioScope = CoroutineScope(Dispatchers.IO + SupervisorJob())
    
    var mergeSettings = MergeSettings()
@@ -34,11 +38,36 @@ class TrainRecordManager(private val context: Context) {
    
    init {
        ioScope.launch {
+            migrateFromSharedPreferences()
            loadRecords()
            loadMergeSettings()
        }
    }
    
+    private suspend fun migrateFromSharedPreferences() {
+        try {
+            val jsonStr = prefs.getString(KEY_RECORDS, null)
+            if (jsonStr != null && jsonStr != "[]") {
+                val jsonArray = JSONArray(jsonStr)
+                val records = mutableListOf<TrainRecordEntity>()
+                
+                for (i in 0 until jsonArray.length()) {
+                    val jsonObject = jsonArray.getJSONObject(i)
+                    val trainRecord = TrainRecord(jsonObject)
+                    records.add(TrainRecordEntity.fromTrainRecord(trainRecord))
+                }
+                
+                if (records.isNotEmpty()) {
+                    trainRecordDao.insertRecords(records)
+                    prefs.edit().remove(KEY_RECORDS).apply()
+                    Log.d(TAG, "Migrated ${records.size} records from SharedPreferences to Room database")
+                }
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to migrate records: ${e.message}")
+        }
+    }
+    
    
    private var filterTrain: String = ""
    private var filterRoute: String = ""
@@ -52,11 +81,16 @@ class TrainRecordManager(private val context: Context) {
        
        
        while (trainRecords.size > MAX_RECORDS) {
-            trainRecords.removeAt(trainRecords.size - 1)
+            val removedRecord = trainRecords.removeAt(trainRecords.size - 1)
+            ioScope.launch {
+                trainRecordDao.deleteRecordById(removedRecord.uniqueId)
+            }
        }
        
        recordCount.incrementAndGet()
-        saveRecords()
+        ioScope.launch {
+            trainRecordDao.insertRecord(TrainRecordEntity.fromTrainRecord(record))
+        }
        return record
    }
    
@@ -76,6 +110,16 @@ class TrainRecordManager(private val context: Context) {
        }
    }
    
+    suspend fun getFilteredRecordsFromDatabase(): List<TrainRecord> {
+        return try {
+            val entities = trainRecordDao.getFilteredRecords(filterTrain, filterRoute, filterDirection)
+            entities.map { it.toTrainRecord() }
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to get filtered records from database: ${e.message}")
+            emptyList()
+        }
+    }
+    
    
    private fun matchFilter(record: TrainRecord): Boolean {
        
@@ -118,32 +162,56 @@ class TrainRecordManager(private val context: Context) {
    }
    
    
+    suspend fun refreshRecordsFromDatabase() {
+        try {
+            val entities = trainRecordDao.getAllRecords()
+            trainRecords.clear()
+            entities.forEach { entity ->
+                trainRecords.add(entity.toTrainRecord())
+            }
+            recordCount.set(trainRecords.size)
+            Log.d(TAG, "Refreshed ${trainRecords.size} records from database")
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to refresh records from database: ${e.message}")
+        }
+    }
+    
+    
    fun clearRecords() {
        trainRecords.clear()
        recordCount.set(0)
-        saveRecords()
+        ioScope.launch {
+            trainRecordDao.deleteAllRecords()
+        }
    }
    
    fun deleteRecord(record: TrainRecord): Boolean {
        val result = trainRecords.remove(record)
        if (result) {
            recordCount.decrementAndGet()
-            saveRecords()
+            ioScope.launch {
+                trainRecordDao.deleteRecordById(record.uniqueId)
+            }
        }
        return result
    }

    fun deleteRecords(records: List<TrainRecord>): Int {
        var deletedCount = 0
+        val idsToDelete = mutableListOf<String>()
+        
        records.forEach { record ->
            if (trainRecords.remove(record)) {
                deletedCount++
+                idsToDelete.add(record.uniqueId)
            }
        }
        
        if (deletedCount > 0) {
            recordCount.addAndGet(-deletedCount)
-            saveRecords()
+            ioScope.launch {
+                trainRecordDao.deleteRecordsByIds(idsToDelete)
+            }
        }
        return deletedCount
    }
@@ -151,12 +219,9 @@ class TrainRecordManager(private val context: Context) {
    private fun saveRecords() {
        ioScope.launch {
            try {
-                val jsonArray = JSONArray()
-                for (record in trainRecords) {
-                    jsonArray.put(record.toJSON())
-                }
-                prefs.edit().putString(KEY_RECORDS, jsonArray.toString()).apply()
-                Log.d(TAG, "Saved ${trainRecords.size} records")
+                val entities = trainRecords.map { TrainRecordEntity.fromTrainRecord(it) }
+                trainRecordDao.insertRecords(entities)
+                Log.d(TAG, "Saved ${trainRecords.size} records to database")
            } catch (e: Exception) {
                Log.e(TAG, "Failed to save records: ${e.message}")
            }
@@ -164,19 +229,17 @@ class TrainRecordManager(private val context: Context) {
    }
    
    
-    private fun loadRecords() {
+    private suspend fun loadRecords() {
        try {
-            val jsonStr = prefs.getString(KEY_RECORDS, "[]")
-            val jsonArray = JSONArray(jsonStr)
+            val entities = trainRecordDao.getAllRecords()
            trainRecords.clear()
            
-            for (i in 0 until jsonArray.length()) {
-                val jsonObject = jsonArray.getJSONObject(i)
-                trainRecords.add(TrainRecord(jsonObject))
+            entities.forEach { entity ->
+                trainRecords.add(entity.toTrainRecord())
            }
            
            recordCount.set(trainRecords.size)
-            Log.d(TAG, "Loaded ${trainRecords.size} records")
+            Log.d(TAG, "Loaded ${trainRecords.size} records from database")
        } catch (e: Exception) {
            Log.e(TAG, "Failed to load records: ${e.message}")
        }
@@ -234,12 +297,12 @@ class TrainRecordManager(private val context: Context) {
    }
    
    private fun processRecordsForMerging(records: List<TrainRecord>, settings: MergeSettings): List<MergedTrainRecord> {
-        val currentTime = Date()
-        val validRecords = records.filter { record ->
-            settings.timeWindow.seconds?.let { windowSeconds ->
+        val validRecords = settings.timeWindow.seconds?.let { windowSeconds ->
+            val currentTime = Date()
+            records.filter { record ->
                (currentTime.time - record.timestamp.time) / 1000 <= windowSeconds
-            } ?: true
-        }
+            }
+        } ?: records
        
        return when (settings.groupBy) {
            GroupBy.TRAIN_OR_LOCO -> processTrainOrLocoMerging(validRecords)
@@ -254,11 +317,14 @@ class TrainRecordManager(private val context: Context) {
                
                groupedRecords.mapNotNull { (groupKey, groupRecords) ->
                    if (groupRecords.size >= 2) {
-                        val sortedRecords = groupRecords.sortedBy { it.timestamp }
-                        val latestRecord = sortedRecords.maxByOrNull { it.timestamp }!!
+                        val latestRecord = if (groupRecords.size > 1) {
+                            groupRecords.maxByOrNull { it.timestamp } ?: groupRecords.last()
+                        } else {
+                            groupRecords.last()
+                        }
                        MergedTrainRecord(
                            groupKey = groupKey,
-                            records = sortedRecords,
+                            records = groupRecords.toList(),
                            latestRecord = latestRecord
                        )
                    } else null
@@ -268,7 +334,9 @@ class TrainRecordManager(private val context: Context) {
    }
    
    private fun processTrainOrLocoMerging(records: List<TrainRecord>): List<MergedTrainRecord> {
-        val groups = mutableListOf<MutableList<TrainRecord>>()
+        val trainGroups = mutableMapOf<String, MutableList<TrainRecord>>()
+        val locoGroups = mutableMapOf<String, MutableList<TrainRecord>>()
+        val mergedGroups = mutableSetOf<MutableList<TrainRecord>>()
        
        records.forEach { record ->
            val train = record.train.trim()
@@ -278,38 +346,44 @@ class TrainRecordManager(private val context: Context) {
                return@forEach
            }
            
-            var foundGroup: MutableList<TrainRecord>? = null
+            var targetGroup: MutableList<TrainRecord>? = null
            
-            for (group in groups) {
-                val shouldMerge = group.any { existingRecord ->
-                    val existingTrain = existingRecord.train.trim()
-                    val existingLoco = existingRecord.loco.trim()
-                    
-                    (train.isNotEmpty() && train != "<NUL>" && train == existingTrain) ||
-                    (loco.isNotEmpty() && loco != "<NUL>" && loco == existingLoco)
-                }
-                
-                if (shouldMerge) {
-                    foundGroup = group
-                    break
-                }
+            if (train.isNotEmpty() && train != "<NUL>") {
+                targetGroup = trainGroups[train]
            }
            
-            if (foundGroup != null) {
-                foundGroup.add(record)
+            if (targetGroup == null && loco.isNotEmpty() && loco != "<NUL>") {
+                targetGroup = locoGroups[loco]
+            }
+            
+            if (targetGroup != null) {
+                targetGroup.add(record)
+                if (train.isNotEmpty() && train != "<NUL>") {
+                    trainGroups[train] = targetGroup
+                }
+                if (loco.isNotEmpty() && loco != "<NUL>") {
+                    locoGroups[loco] = targetGroup
+                }
            } else {
-                groups.add(mutableListOf(record))
+                val newGroup = mutableListOf(record)
+                mergedGroups.add(newGroup)
+                
+                if (train.isNotEmpty() && train != "<NUL>") {
+                    trainGroups[train] = newGroup
+                }
+                if (loco.isNotEmpty() && loco != "<NUL>") {
+                    locoGroups[loco] = newGroup
+                }
            }
        }
        
-        return groups.mapNotNull { groupRecords ->
+        return mergedGroups.mapNotNull { groupRecords ->
            if (groupRecords.size >= 2) {
-                val sortedRecords = groupRecords.sortedBy { it.timestamp }
-                val latestRecord = sortedRecords.maxByOrNull { it.timestamp }!!
+                val latestRecord = groupRecords.maxByOrNull { it.timestamp } ?: groupRecords.lastOrNull() ?: return@mapNotNull null
                val groupKey = "${latestRecord.train}_OR_${latestRecord.loco}"
                MergedTrainRecord(
                    groupKey = groupKey,
-                    records = sortedRecords,
+                    records = groupRecords.toList(),
                    latestRecord = latestRecord
                )
            } else null
@@ -349,4 +423,41 @@ class TrainRecordManager(private val context: Context) {
            mergeSettings = MergeSettings()
        }
    }
+    
+    suspend fun exportRecordsToJson(): JSONArray {
+        val jsonArray = JSONArray()
+        try {
+            val entities = trainRecordDao.getAllRecords()
+            entities.forEach { entity ->
+                val record = entity.toTrainRecord()
+                jsonArray.put(record.toJSON())
+            }
+            Log.d(TAG, "Exported ${entities.size} records to JSON")
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to export records to JSON: ${e.message}")
+        }
+        return jsonArray
+    }
+    
+    suspend fun importRecordsFromJson(jsonArray: JSONArray): Int {
+        var importedCount = 0
+        try {
+            val records = mutableListOf<TrainRecordEntity>()
+            for (i in 0 until jsonArray.length()) {
+                val jsonObject = jsonArray.getJSONObject(i)
+                val trainRecord = TrainRecord(jsonObject)
+                records.add(TrainRecordEntity.fromTrainRecord(trainRecord))
+            }
+            
+            if (records.isNotEmpty()) {
+                trainRecordDao.insertRecords(records)
+                importedCount = records.size
+                refreshRecordsFromDatabase()
+                Log.d(TAG, "Imported $importedCount records from JSON")
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to import records from JSON: ${e.message}")
+        }
+        return importedCount
+    }
 }
--- a/app/src/main/java/org/noxylva/lbjconsole/ui/components/TrainDetailDialog.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/ui/components/TrainDetailDialog.kt
@@ -1,172 +0,0 @@
-package org.noxylva.lbjconsole.ui.components
-
-import androidx.compose.foundation.layout.*
-import androidx.compose.foundation.rememberScrollState
-import androidx.compose.foundation.verticalScroll
-import androidx.compose.material3.*
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.remember
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.unit.dp
-import androidx.compose.ui.viewinterop.AndroidView
-import androidx.compose.ui.window.Dialog
-import androidx.compose.ui.window.DialogProperties
-import org.osmdroid.tileprovider.tilesource.TileSourceFactory
-import org.osmdroid.views.MapView
-import org.osmdroid.views.overlay.Marker
-import org.noxylva.lbjconsole.model.TrainRecord
-
-@Composable
-fun TrainDetailDialog(
-    trainRecord: TrainRecord,
-    onDismiss: () -> Unit
-) {
-    val recordMap = trainRecord.toMap()
-    val coordinates = remember { trainRecord.getCoordinates() }
-    
-    Dialog(
-        onDismissRequest = onDismiss,
-        properties = DialogProperties(
-            dismissOnBackPress = true,
-            dismissOnClickOutside = true
-        )
-    ) {
-        Card(
-            modifier = Modifier
-                .fillMaxWidth()
-                .padding(16.dp),
-            elevation = CardDefaults.cardElevation(defaultElevation = 8.dp)
-        ) {
-            Column(
-                modifier = Modifier
-                    .fillMaxWidth()
-                    .padding(16.dp)
-                    .verticalScroll(rememberScrollState())
-            ) {
-                
-                Text(
-                    text = "列车详情",
-                    style = MaterialTheme.typography.titleLarge,
-                    fontWeight = FontWeight.Bold,
-                    modifier = Modifier.padding(bottom = 16.dp)
-                )
-                
-                
-                Row(
-                    modifier = Modifier.fillMaxWidth(),
-                    horizontalArrangement = Arrangement.SpaceBetween
-                ) {
-                    DetailItem("列车号", recordMap["train"] ?: "--")
-                    DetailItem("方向", recordMap["direction"] ?: "未知")
-                }
-                
-                HorizontalDivider(modifier = Modifier.padding(vertical = 8.dp))
-                
-                
-                DetailItem("接收时间", recordMap["timestamp"] ?: "--")
-                DetailItem("列车时间", recordMap["time"] ?: "--")
-                
-                HorizontalDivider(modifier = Modifier.padding(vertical = 8.dp))
-                
-                
-                DetailItem("速度", recordMap["speed"] ?: "--")
-                DetailItem("位置", recordMap["position"] ?: "--")
-                DetailItem("位置信息", recordMap["position_info"] ?: "--")
-                
-                HorizontalDivider(modifier = Modifier.padding(vertical = 8.dp))
-                
-                
-                DetailItem("机车号", recordMap["loco"] ?: "--")
-                DetailItem("机车类型", recordMap["loco_type"] ?: "--")
-                DetailItem("列车类型", recordMap["lbj_class"] ?: "--")
-                
-                HorizontalDivider(modifier = Modifier.padding(vertical = 8.dp))
-                
-                
-                DetailItem("路线", recordMap["route"] ?: "--")
-                DetailItem("信号强度", recordMap["rssi"] ?: "--")
-                
-                if (coordinates != null) {
-                    HorizontalDivider(modifier = Modifier.padding(vertical = 8.dp))
-                    
-                    DetailItem(
-                        label = "经纬度",
-                        value = "纬度: ${coordinates.latitude}, 经度: ${coordinates.longitude}"
-                    )
-                    
-                    
-                    Spacer(modifier = Modifier.height(8.dp))
-                    
-                    
-                    Box(
-                        modifier = Modifier
-                            .fillMaxWidth()
-                            .height(200.dp)
-                            .padding(vertical = 8.dp),
-                        contentAlignment = Alignment.Center
-                    ) {
-                        AndroidView(
-                            factory = { context ->
-                                MapView(context).apply {
-                                    setTileSource(TileSourceFactory.MAPNIK)
-                                    setMultiTouchControls(true)
-                                    controller.setZoom(15.0)
-                                    controller.setCenter(coordinates)
-                                    
-                                    
-                                    val marker = Marker(this)
-                                    marker.position = coordinates
-                                    marker.setAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_BOTTOM)
-                                    marker.title = recordMap["train"] ?: "列车"
-                                    overlays.add(marker)
-                                }
-                            },
-                            update = { mapView ->
-                                mapView.controller.setCenter(coordinates)
-                                mapView.invalidate()
-                            }
-                        )
-                    }
-                }
-                
-                Spacer(modifier = Modifier.height(16.dp))
-                
-                
-                Button(
-                    onClick = onDismiss,
-                    modifier = Modifier
-                        .fillMaxWidth()
-                        .padding(top = 8.dp)
-                ) {
-                    Text("关闭")
-                }
-            }
-        }
-    }
-}
-
-@Composable
-private fun DetailItem(
-    label: String,
-    value: String,
-    modifier: Modifier = Modifier
-) {
-    Column(
-        modifier = modifier
-            .fillMaxWidth()
-            .padding(vertical = 4.dp)
-    ) {
-        Text(
-            text = label,
-            style = MaterialTheme.typography.labelMedium,
-            color = MaterialTheme.colorScheme.onSurfaceVariant
-        )
-        
-        Text(
-            text = value,
-            style = MaterialTheme.typography.bodyLarge
-        )
-    }
-}
--- a/app/src/main/java/org/noxylva/lbjconsole/ui/screens/HistoryScreen.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/ui/screens/HistoryScreen.kt
@@ -42,8 +42,15 @@ import org.noxylva.lbjconsole.model.MergedTrainRecord
 import org.noxylva.lbjconsole.model.MergeSettings
 import org.noxylva.lbjconsole.model.GroupBy
 import org.noxylva.lbjconsole.util.LocoInfoUtil
+import org.noxylva.lbjconsole.util.TrainTypeUtil
+import org.osmdroid.util.BoundingBox
+import org.osmdroid.util.GeoPoint
 import java.text.SimpleDateFormat
 import java.util.*
+import androidx.compose.ui.platform.LocalContext
+
+data class CardMapView(val center: GeoPoint, val zoom: Double)
+

@OptIn(ExperimentalFoundationApi::class)
@Composable
@@ -54,6 +61,7 @@ fun TrainRecordItem(
    expandedStatesMap: MutableMap<String, Boolean>,
    latestRecord: TrainRecord?,
    locoInfoUtil: LocoInfoUtil?,
+    trainTypeUtil: TrainTypeUtil?,
    onRecordClick: (TrainRecord) -> Unit,
    onToggleSelection: (TrainRecord) -> Unit,
    onLongClick: (TrainRecord) -> Unit,
@@ -62,6 +70,8 @@ fun TrainRecordItem(
    val recordId = record.uniqueId
    val isExpanded = expandedStatesMap[recordId] == true
    
+
+    
    val cardColor = when {
        isSelected -> MaterialTheme.colorScheme.primaryContainer
        else -> MaterialTheme.colorScheme.surface
@@ -130,32 +140,53 @@ fun TrainRecordItem(
                        }
                    }
                    
-                    Text(
-                        text = "${record.rssi} dBm",
-                        fontSize = 10.sp,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant
-                    )
+                    val trainType = if (record.train?.trim().isNullOrEmpty()) {
+                        null
+                    } else {
+                        val lbjClassValue = record.lbjClass?.trim() ?: "NA"
+                        trainTypeUtil?.getTrainType(lbjClassValue, record.train!!.trim())
+                    }
+                    if (!trainType.isNullOrEmpty()) {
+                        Text(
+                            text = trainType,
+                            fontSize = 10.sp,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                        )
+                    }
                }

-                Spacer(modifier = Modifier.height(2.dp))
+                val hasTrainDisplay = recordMap["train"]?.toString()?.isNotEmpty() ?: false
+                val hasRouteOrPosition = record.route.trim().isNotEmpty() && !record.route.trim().all { it == '*' } ||
+                    record.position.trim().isNotEmpty() && !record.position.trim().all { it == '-' || it == '.' } && record.position.trim() != "<NUL>"
+                val hasSpeed = record.speed.trim().isNotEmpty() &&
+                    !record.speed.trim().all { it == '*' || it == '-' } &&
+                    record.speed.trim() != "NUL" && record.speed.trim() != "<NUL>"
+                val hasLocoInfo = locoInfoUtil != null && record.locoType.isNotEmpty() && record.loco.isNotEmpty() && 
+                    locoInfoUtil.getLocoInfoDisplay(record.locoType, record.loco) != null
+                
+                val shouldShowOnlyTime = !hasTrainDisplay && !hasRouteOrPosition && !hasSpeed && !hasLocoInfo
+
+                Spacer(modifier = Modifier.height(if (shouldShowOnlyTime) 0.dp else 2.dp))

                Row(
                    modifier = Modifier.fillMaxWidth(),
                    horizontalArrangement = Arrangement.SpaceBetween,
                    verticalAlignment = Alignment.CenterVertically
                ) {
-                    val trainDisplay = recordMap["train"]?.toString() ?: "未知列车"
+                    val trainDisplay = recordMap["train"]?.toString() ?: ""

                    Row(
                        verticalAlignment = Alignment.CenterVertically,
                        horizontalArrangement = Arrangement.spacedBy(6.dp)
                    ) {
-                        Text(
-                            text = trainDisplay,
-                            fontWeight = FontWeight.Bold,
-                            fontSize = 20.sp,
-                            color = MaterialTheme.colorScheme.primary
-                        )
+                        if (trainDisplay.isNotEmpty()) {
+                            Text(
+                                text = trainDisplay,
+                                fontWeight = FontWeight.Bold,
+                                fontSize = 20.sp,
+                                color = MaterialTheme.colorScheme.primary
+                            )
+                        }

                        val directionText = when (record.direction) {
                            1 -> "下"
@@ -185,16 +216,16 @@ fun TrainRecordItem(
                            }
                        }
                    }
-
+                    
                    val formattedInfo = when {
                        record.locoType.isNotEmpty() && record.loco.isNotEmpty() -> {
-                            val shortLoco = if (record.loco.length > 5) {
-                                record.loco.takeLast(5)
-                            } else {
-                                record.loco
-                            }
-                            "${record.locoType}-${shortLoco}"
+                        val shortLoco = if (record.loco.length > 5) {
+                            record.loco.takeLast(5)
+                        } else {
+                            record.loco
                        }
+                        "${record.locoType}-${shortLoco}"
+                    }
                        record.locoType.isNotEmpty() -> record.locoType
                        record.loco.isNotEmpty() -> record.loco
                        else -> ""
@@ -209,7 +240,7 @@ fun TrainRecordItem(
                    }
                }

-                Spacer(modifier = Modifier.height(8.dp))
+                Spacer(modifier = Modifier.height(if (shouldShowOnlyTime) 0.dp else 2.dp))

                Row(
                    modifier = Modifier.fillMaxWidth(),
@@ -240,7 +271,7 @@ fun TrainRecordItem(

                            if (isValidPosition) {
                                Text(
-                                    text = "${position}K",
+                                    text = "${position.trim().removeSuffix(".")}K",
                                    fontSize = 16.sp,
                                    color = MaterialTheme.colorScheme.onSurface,
                                    modifier = Modifier.alignByBaseline()
@@ -269,7 +300,7 @@ fun TrainRecordItem(
                        record.loco
                    )
                    if (locoInfoText != null) {
-                        Spacer(modifier = Modifier.height(4.dp))
+                        Spacer(modifier = Modifier.height(if (shouldShowOnlyTime) 0.dp else 2.dp))
                        Text(
                            text = locoInfoText,
                            fontSize = 14.sp,
@@ -277,7 +308,8 @@ fun TrainRecordItem(
                        )
                    }
                }
-                Spacer(modifier = Modifier.height(8.dp))
+                
+                Spacer(modifier = Modifier.height(if (shouldShowOnlyTime) 0.dp else 2.dp))
                AnimatedVisibility(
                    visible = isExpanded,
                    enter = expandVertically(animationSpec = spring(dampingRatio = Spring.DampingRatioNoBouncy, stiffness = Spring.StiffnessMediumLow)) + fadeIn(animationSpec = spring(dampingRatio = Spring.DampingRatioNoBouncy, stiffness = Spring.StiffnessMediumLow)),
@@ -316,6 +348,7 @@ fun TrainRecordItem(
                                            controller.setZoom(10.0)
                                            controller.setCenter(coordinates)
                                            this.isTilesScaledToDpi = true
+                                            tilesScaleFactor = context.resources.displayMetrics.density * 0.2f
                                            this.setUseDataConnection(true)

                                            try {
@@ -393,9 +426,12 @@ fun MergedTrainRecordItem(
    mergedRecord: MergedTrainRecord,
    expandedStatesMap: MutableMap<String, Boolean>,
    locoInfoUtil: LocoInfoUtil?,
+    trainTypeUtil: TrainTypeUtil?,
    mergeSettings: MergeSettings? = null,
    isInEditMode: Boolean = false,
    selectedRecords: List<TrainRecord> = emptyList(),
+    mapViewState: CardMapView?,
+    onMapViewStateChange: (CardMapView) -> Unit,
    onToggleSelection: (TrainRecord) -> Unit = {},
    onLongClick: (TrainRecord) -> Unit = {},
    modifier: Modifier = Modifier
@@ -484,11 +520,19 @@ fun MergedTrainRecordItem(
                        }
                    }
                    
-                    Text(
-                        text = "${latestRecord.rssi} dBm",
-                        fontSize = 10.sp,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant
-                    )
+                    val trainType = if (latestRecord.train?.trim().isNullOrEmpty()) {
+                        null
+                    } else {
+                        val lbjClassValue = latestRecord.lbjClass?.trim() ?: "NA"
+                        trainTypeUtil?.getTrainType(lbjClassValue, latestRecord.train!!.trim())
+                    }
+                    if (!trainType.isNullOrEmpty()) {
+                        Text(
+                            text = trainType,
+                            fontSize = 10.sp,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                        )
+                    }
                }

                Spacer(modifier = Modifier.height(2.dp))
@@ -498,18 +542,20 @@ fun MergedTrainRecordItem(
                    horizontalArrangement = Arrangement.SpaceBetween,
                    verticalAlignment = Alignment.CenterVertically
                ) {
-                    val trainDisplay = recordMap["train"]?.toString() ?: "未知列车"
+                    val trainDisplay = recordMap["train"]?.toString() ?: ""

                    Row(
                        verticalAlignment = Alignment.CenterVertically,
                        horizontalArrangement = Arrangement.spacedBy(6.dp)
                    ) {
-                        Text(
-                            text = trainDisplay,
-                            fontWeight = FontWeight.Bold,
-                            fontSize = 20.sp,
-                            color = MaterialTheme.colorScheme.primary
-                        )
+                        if (trainDisplay.isNotEmpty()) {
+                            Text(
+                                text = trainDisplay,
+                                fontWeight = FontWeight.Bold,
+                                fontSize = 20.sp,
+                                color = MaterialTheme.colorScheme.primary
+                            )
+                        }

                        val directionText = when (latestRecord.direction) {
                            1 -> "下"
@@ -542,13 +588,13 @@ fun MergedTrainRecordItem(

                    val formattedInfo = when {
                        latestRecord.locoType.isNotEmpty() && latestRecord.loco.isNotEmpty() -> {
-                            val shortLoco = if (latestRecord.loco.length > 5) {
-                                latestRecord.loco.takeLast(5)
-                            } else {
-                                latestRecord.loco
-                            }
-                            "${latestRecord.locoType}-${shortLoco}"
+                        val shortLoco = if (latestRecord.loco.length > 5) {
+                            latestRecord.loco.takeLast(5)
+                        } else {
+                            latestRecord.loco
                        }
+                        "${latestRecord.locoType}-${shortLoco}"
+                    }
                        latestRecord.locoType.isNotEmpty() -> latestRecord.locoType
                        latestRecord.loco.isNotEmpty() -> latestRecord.loco
                        else -> ""
@@ -563,7 +609,7 @@ fun MergedTrainRecordItem(
                    }
                }

-                Spacer(modifier = Modifier.height(8.dp))
+                Spacer(modifier = Modifier.height(2.dp))

                Row(
                    modifier = Modifier.fillMaxWidth(),
@@ -594,7 +640,7 @@ fun MergedTrainRecordItem(

                            if (isValidPosition) {
                                Text(
-                                    text = "${position}K",
+                                    text = "${position.trim().removeSuffix(".")}K",
                                    fontSize = 16.sp,
                                    color = MaterialTheme.colorScheme.onSurface,
                                    modifier = Modifier.alignByBaseline()
@@ -623,7 +669,7 @@ fun MergedTrainRecordItem(
                        latestRecord.loco
                    )
                    if (locoInfoText != null) {
-                        Spacer(modifier = Modifier.height(4.dp))
+                        Spacer(modifier = Modifier.height(2.dp))
                        Text(
                            text = locoInfoText,
                            fontSize = 14.sp,
@@ -631,100 +677,159 @@ fun MergedTrainRecordItem(
                        )
                    }
                }
-                Spacer(modifier = Modifier.height(8.dp))
+                Spacer(modifier = Modifier.height(2.dp))
                AnimatedVisibility(
                    visible = isExpanded,
                    enter = expandVertically(animationSpec = spring(dampingRatio = Spring.DampingRatioNoBouncy, stiffness = Spring.StiffnessMediumLow)) + fadeIn(animationSpec = spring(dampingRatio = Spring.DampingRatioNoBouncy, stiffness = Spring.StiffnessMediumLow)),
                    exit = shrinkVertically(animationSpec = spring(dampingRatio = Spring.DampingRatioNoBouncy, stiffness = Spring.StiffnessMediumLow)) + fadeOut(animationSpec = spring(dampingRatio = Spring.DampingRatioNoBouncy, stiffness = Spring.StiffnessMediumLow))
                ) {
                    Column {
-                        val coordinates = remember { latestRecord.getCoordinates() }
+                        val allValidCoordinates = remember {
+                            mergedRecord.records
+                                .mapNotNull { it.getCoordinates() }
+                                .filter { it.latitude != 0.0 || it.longitude != 0.0 }
+                        }

+                        if (allValidCoordinates.isNotEmpty()) {
+                            Box(
+                                modifier = Modifier
+                                    .fillMaxWidth()
+                                    .height(220.dp)
+                                    .padding(vertical = 4.dp)
+                                    .clip(RoundedCornerShape(8.dp)),
+                                contentAlignment = Alignment.Center
+                            ) {
+                                AndroidView(
+                                    modifier = Modifier.clickable(
+                                        indication = null,
+                                        interactionSource = remember { MutableInteractionSource() }
+                                    ) {},
+                                    factory = { context ->
+                                        MapView(context).apply {
+                                            setTileSource(TileSourceFactory.MAPNIK)
+                                            setMultiTouchControls(true)
+                                            zoomController.setVisibility(org.osmdroid.views.CustomZoomButtonsController.Visibility.NEVER)
+                                            isHorizontalMapRepetitionEnabled = false
+                                            isVerticalMapRepetitionEnabled = false
+                                            setHasTransientState(true)
+                                            setOnTouchListener { v, event ->
+                                                v.parent?.requestDisallowInterceptTouchEvent(true)
+                                                false
+                                            }
+                                            this.isTilesScaledToDpi = true
+                                            tilesScaleFactor = context.resources.displayMetrics.density * 0.2f
+                                            this.setUseDataConnection(true)

+                                            addMapListener(object : org.osmdroid.events.MapListener {
+                                                override fun onScroll(event: org.osmdroid.events.ScrollEvent?): Boolean {
+                                                    val center = mapCenter
+                                                    val zoom = zoomLevelDouble
+                                                    onMapViewStateChange(CardMapView(center as GeoPoint, zoom))
+                                                    return true
+                                                }

-                        if (coordinates != null) {
-                        Box(
-                            modifier = Modifier
-                                .fillMaxWidth()
-                                .height(220.dp)
-                                .padding(vertical = 4.dp)
-                                .clip(RoundedCornerShape(8.dp)),
-                            contentAlignment = Alignment.Center
-                        ) {
-                            AndroidView(
-                                modifier = Modifier.clickable(
-                                    indication = null,
-                                    interactionSource = remember { MutableInteractionSource() }
-                                ) {},
-                                factory = { context ->
-                                    MapView(context).apply {
-                                        setTileSource(TileSourceFactory.MAPNIK)
-                                        setMultiTouchControls(true)
-                                        zoomController.setVisibility(org.osmdroid.views.CustomZoomButtonsController.Visibility.NEVER)
-                                        isHorizontalMapRepetitionEnabled = false
-                                        isVerticalMapRepetitionEnabled = false
-                                        setHasTransientState(true)
-                                        setOnTouchListener { v, event ->
-                                            v.parent?.requestDisallowInterceptTouchEvent(true)
-                                            false
-                                        }
-                                        controller.setZoom(10.0)
-                                        controller.setCenter(coordinates)
-                                        this.isTilesScaledToDpi = true
-                                        this.setUseDataConnection(true)
+                                                override fun onZoom(event: org.osmdroid.events.ZoomEvent?): Boolean {
+                                                    val center = mapCenter
+                                                    val zoom = zoomLevelDouble
+                                                    onMapViewStateChange(CardMapView(center as GeoPoint, zoom))
+                                                    return true
+                                                }
+                                            })

-                                        try {
-                                            val railwayTileSource = XYTileSource(
-                                                "OpenRailwayMap", 8, 16, 256, ".png",
-                                                arrayOf(
-                                                    "https://a.tiles.openrailwayMap.org/standard/",
-                                                    "https://b.tiles.openrailwaymap.org/standard/",
-                                                    "https://c.tiles.openrailwaymap.org/standard/"
-                                                ),
-                                                "© OpenRailwayMap contributors, © OpenStreetMap contributors"
-                                            )
+                                            try {
+                                                val railwayTileSource = XYTileSource(
+                                                    "OpenRailwayMap", 8, 16, 256, ".png",
+                                                    arrayOf(
+                                                        "https://a.tiles.openrailwaymap.org/standard/",
+                                                        "https://b.tiles.openrailwaymap.org/standard/",
+                                                        "https://c.tiles.openrailwaymap.org/standard/"
+                                                    ),
+                                                    "© OpenRailwayMap contributors, © OpenStreetMap contributors"
+                                                )

-                                            val railwayProvider = MapTileProviderBasic(context)
-                                            railwayProvider.tileSource = railwayTileSource
+                                                val railwayProvider = MapTileProviderBasic(context)
+                                                railwayProvider.tileSource = railwayTileSource

-                                            val railwayOverlay = TilesOverlay(railwayProvider, context)
-                                            railwayOverlay.loadingBackgroundColor = android.graphics.Color.TRANSPARENT
-                                            railwayOverlay.loadingLineColor = android.graphics.Color.TRANSPARENT
+                                                val railwayOverlay = TilesOverlay(railwayProvider, context)
+                                                railwayOverlay.loadingBackgroundColor = android.graphics.Color.TRANSPARENT
+                                                railwayOverlay.loadingLineColor = android.graphics.Color.TRANSPARENT

-                                            overlays.add(railwayOverlay)
-                                        } catch (e: Exception) {
-                                            e.printStackTrace()
-                                        }
-
-                                        try {
-                                            val locationProvider = GpsMyLocationProvider(context).apply {
-                                                locationUpdateMinDistance = 10f
-                                                locationUpdateMinTime = 1000
+                                                overlays.add(railwayOverlay)
+                                            } catch (e: Exception) {
+                                                e.printStackTrace()
                                            }

-                                            MyLocationNewOverlay(locationProvider, this).apply {
-                                                enableMyLocation()
-                                            }.also { overlays.add(it) }
-                                        } catch (e: Exception) {
-                                            e.printStackTrace()
+                                            try {
+                                                val locationProvider = GpsMyLocationProvider(context).apply {
+                                                    locationUpdateMinDistance = 10f
+                                                    locationUpdateMinTime = 1000
+                                                }
+
+                                                MyLocationNewOverlay(locationProvider, this).apply {
+                                                    enableMyLocation()
+                                                }.also { overlays.add(it) }
+                                            } catch (e: Exception) {
+                                                e.printStackTrace()
+                                            }
+
+                                            mergedRecord.records.forEach { record ->
+                                                record.getCoordinates()?.let { coordinates ->
+                                                    if (coordinates.latitude != 0.0 || coordinates.longitude != 0.0) {
+                                                        val recordMap = record.toMap()
+                                                        val marker = Marker(this)
+                                                        marker.position = coordinates
+
+                                                        val latStr = String.format("%.4f", coordinates.latitude)
+                                                        val lonStr = String.format("%.4f", coordinates.longitude)
+                                                        val coordStr = "${latStr}°N, ${lonStr}°E"
+                                                        marker.title = recordMap["train"]?.toString() ?: "列车"
+                                                        marker.snippet = coordStr
+                                                        marker.setInfoWindowAnchor(Marker.ANCHOR_CENTER, 0f)
+
+                                                        overlays.add(marker)
+                                                        if (record == latestRecord) {
+                                                            marker.showInfoWindow()
+                                                        }
+                                                    }
+                                                }
+                                            }
+
+                                            if (mapViewState != null) {
+                                                controller.setZoom(mapViewState.zoom)
+                                                controller.setCenter(mapViewState.center)
+                                            } else if (allValidCoordinates.size > 1) {
+                                                val boundingBox = BoundingBox.fromGeoPoints(allValidCoordinates.filter { it.latitude != 0.0 || it.longitude != 0.0 })
+                                                val layoutListener = object : android.view.View.OnLayoutChangeListener {
+                                                    override fun onLayoutChange(v: android.view.View?, left: Int, top: Int, right: Int, bottom: Int, oldLeft: Int, oldTop: Int, oldRight: Int, oldBottom: Int) {
+                                                        if (width > 0 && height > 0) {
+                                                            val zoomLevel = org.osmdroid.views.MapView.getTileSystem().getBoundingBoxZoom(boundingBox, width, height)
+                                                            val latSpan = boundingBox.latitudeSpan
+                                                            val adjustedCenter = org.osmdroid.util.GeoPoint(
+                                                                boundingBox.center.latitude + latSpan * 0.25,
+                                                                boundingBox.center.longitude
+                                                            )
+                                                            val newZoom = zoomLevel - 1.0
+                                                            
+                                                            controller.setZoom(newZoom)
+                                                            controller.setCenter(adjustedCenter)
+                                                            onMapViewStateChange(CardMapView(adjustedCenter, newZoom))
+
+                                                            removeOnLayoutChangeListener(this)
+                                                        }
+                                                    }
+                                                }
+                                                addOnLayoutChangeListener(layoutListener)
+                                            } else if (allValidCoordinates.isNotEmpty()) {
+                                                val center = allValidCoordinates.first()
+                                                val zoom = 10.0
+                                                controller.setZoom(zoom)
+                                                controller.setCenter(center)
+                                                onMapViewStateChange(CardMapView(center, zoom))
+                                            }
                                        }
-
-                                        val marker = Marker(this)
-                                        marker.position = coordinates
-
-                                        val latStr = String.format("%.4f", coordinates.latitude)
-                                        val lonStr = String.format("%.4f", coordinates.longitude)
-                                        val coordStr = "${latStr}°N, ${lonStr}°E"
-                                        marker.title = recordMap["train"]?.toString() ?: "列车"
-                                        marker.snippet = coordStr
-                                        marker.setInfoWindowAnchor(Marker.ANCHOR_CENTER, 0f)
-
-                                        overlays.add(marker)
-                                        marker.showInfoWindow()
-                                    }
-                                },
-                                update = { mapView -> mapView.invalidate() }
-                            )
+                                    },
+                                    update = { mapView -> mapView.invalidate() }
+                                )
                            }
                        }
                        if (recordMap.containsKey("position_info")) {
@@ -771,6 +876,30 @@ fun MergedTrainRecordItem(
                                            "${recordItem.locoType}-${recordItem.loco}"
                                        } else null
                                    }
+                                    GroupBy.TRAIN_OR_LOCO -> {
+                                        val latestTrain = mergedRecord.latestRecord.train.trim()
+                                        val latestLoco = mergedRecord.latestRecord.loco.trim()
+                                        val recordTrain = recordItem.train.trim()
+                                        val recordLoco = recordItem.loco.trim()
+                                        
+                                        when {
+                                            latestTrain.isNotEmpty() && latestTrain != "<NUL>" && 
+                                            recordTrain.isNotEmpty() && recordTrain != "<NUL>" && 
+                                            latestTrain == recordTrain && latestLoco != recordLoco -> {
+                                                if (recordLoco.isNotEmpty() && recordLoco != "<NUL>") {
+                                                    "${recordItem.locoType}-${recordLoco}"
+                                                } else null
+                                            }
+                                            latestLoco.isNotEmpty() && latestLoco != "<NUL>" && 
+                                            recordLoco.isNotEmpty() && recordLoco != "<NUL>" && 
+                                            latestLoco == recordLoco && latestTrain != recordTrain -> {
+                                                if (recordTrain.isNotEmpty() && recordTrain != "<NUL>") {
+                                                    recordTrain
+                                                } else null
+                                            }
+                                            else -> null
+                                        }
+                                    }
                                    else -> null
                                }
                                
@@ -794,12 +923,12 @@ fun MergedTrainRecordItem(
                                    }
                                    if (recordItem.position.isNotEmpty() && recordItem.position != "<NUL>") {
                                        if (isNotEmpty()) append(" ")
-                                        append("${recordItem.position}K")
+                                        append("${recordItem.position.trim().removeSuffix(".")}K")
                                    }
                                }
                                
                                Text(
-                                    text = locationText.ifEmpty { "位置未知" },
+                                    text = locationText.ifEmpty { "" },
                                    fontSize = 11.sp,
                                    color = MaterialTheme.colorScheme.onSurfaceVariant
                                )
@@ -849,6 +978,7 @@ fun HistoryScreen(
    lastUpdateTime: Date?,
    temporaryStatusMessage: String? = null,
    locoInfoUtil: LocoInfoUtil? = null,
+    trainTypeUtil: TrainTypeUtil? = null,
    mergeSettings: MergeSettings? = null,
    onClearRecords: () -> Unit = {},
    onRecordClick: (TrainRecord) -> Unit = {},
@@ -857,9 +987,10 @@ fun HistoryScreen(
    editMode: Boolean = false,
    selectedRecords: Set<String> = emptySet(),
    expandedStates: Map<String, Boolean> = emptyMap(),
+    mapViewStates: Map<String, CardMapView> = emptyMap(),
    scrollPosition: Int = 0,
    scrollOffset: Int = 0,
-    onStateChange: (Boolean, Set<String>, Map<String, Boolean>, Int, Int) -> Unit = { _, _, _, _, _ -> }
+    onStateChange: (Boolean, Set<String>, Map<String, Boolean>, Map<String, CardMapView>, Int, Int) -> Unit = { _, _, _, _, _, _ -> }
 ) {

    val refreshKey = latestRecord?.timestamp?.time ?: 0
@@ -889,6 +1020,9 @@ fun HistoryScreen(
    val expandedStatesMap = remember(expandedStates) { 
        mutableStateMapOf<String, Boolean>().apply { putAll(expandedStates) }
    }
+    val mapViewStatesMap = remember(mapViewStates) {
+        mutableStateMapOf<String, CardMapView>().apply { putAll(mapViewStates) }
+    }
    
    val listState = rememberLazyListState(
        initialFirstVisibleItemIndex = scrollPosition,
@@ -919,28 +1053,28 @@ fun HistoryScreen(

    LaunchedEffect(isInEditMode, selectedRecordsList.size) {
        val selectedIds = selectedRecordsList.map { it.uniqueId }.toSet()
-        onStateChange(isInEditMode, selectedIds, expandedStatesMap.toMap(), listState.firstVisibleItemIndex, listState.firstVisibleItemScrollOffset)
+        onStateChange(isInEditMode, selectedIds, expandedStatesMap.toMap(), mapViewStatesMap.toMap(), listState.firstVisibleItemIndex, listState.firstVisibleItemScrollOffset)
    }
    
    LaunchedEffect(expandedStatesMap.toMap()) {
        if (!isInEditMode) {
            val selectedIds = selectedRecordsList.map { it.uniqueId }.toSet()
            delay(50)
-            onStateChange(isInEditMode, selectedIds, expandedStatesMap.toMap(), listState.firstVisibleItemIndex, listState.firstVisibleItemScrollOffset)
+            onStateChange(isInEditMode, selectedIds, expandedStatesMap.toMap(), mapViewStatesMap.toMap(), listState.firstVisibleItemIndex, listState.firstVisibleItemScrollOffset)
        }
    }
    
    LaunchedEffect(listState.firstVisibleItemIndex, listState.firstVisibleItemScrollOffset) {
        if (!isInEditMode) {
            val selectedIds = selectedRecordsList.map { it.uniqueId }.toSet()
-            onStateChange(isInEditMode, selectedIds, expandedStatesMap.toMap(), listState.firstVisibleItemIndex, listState.firstVisibleItemScrollOffset)
+            onStateChange(isInEditMode, selectedIds, expandedStatesMap.toMap(), mapViewStatesMap.toMap(), listState.firstVisibleItemIndex, listState.firstVisibleItemScrollOffset)
        }
    }

    LaunchedEffect(selectedRecordsList.size) {
        if (selectedRecordsList.isEmpty() && isInEditMode) {
            isInEditMode = false
-            onStateChange(false, emptySet(), expandedStatesMap.toMap(), listState.firstVisibleItemIndex, listState.firstVisibleItemScrollOffset)
+            onStateChange(false, emptySet(), expandedStatesMap.toMap(), mapViewStatesMap.toMap(), listState.firstVisibleItemIndex, listState.firstVisibleItemScrollOffset)
        }
    }
    
@@ -1018,6 +1152,7 @@ fun HistoryScreen(
                                        expandedStatesMap = expandedStatesMap,
                                        latestRecord = latestRecord,
                                        locoInfoUtil = locoInfoUtil,
+                                        trainTypeUtil = trainTypeUtil,
                                        onRecordClick = onRecordClick,
                                        onToggleSelection = { record ->
                                            if (selectedRecordsList.contains(record)) {
@@ -1041,9 +1176,14 @@ fun HistoryScreen(
                                        mergedRecord = item,
                                        expandedStatesMap = expandedStatesMap,
                                        locoInfoUtil = locoInfoUtil,
+                                        trainTypeUtil = trainTypeUtil,
                                        mergeSettings = mergeSettings,
                                        isInEditMode = isInEditMode,
                                        selectedRecords = selectedRecordsList,
+                                        mapViewState = mapViewStatesMap[item.groupKey],
+                                        onMapViewStateChange = { newState ->
+                                            mapViewStatesMap[item.groupKey] = newState
+                                        },
                                        onToggleSelection = { record ->
                                            if (selectedRecordsList.contains(record)) {
                                                selectedRecordsList.remove(record)
--- a/app/src/main/java/org/noxylva/lbjconsole/ui/screens/MapScreen.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/ui/screens/MapScreen.kt
@@ -7,7 +7,12 @@ import android.graphics.PorterDuff
 import android.graphics.PorterDuffColorFilter
 import android.util.Log
 import android.view.ViewGroup
+import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Refresh
 import androidx.compose.material.icons.filled.MyLocation
@@ -16,11 +21,16 @@ import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Shape
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalLifecycleOwner
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.compose.ui.viewinterop.AndroidView
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.CircleShape
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.LifecycleEventObserver
 import kotlinx.coroutines.launch
@@ -112,7 +122,6 @@ fun MapScreen(
                    
                    val recordMap = record.toMap()
                    title = recordMap["train"]?.toString() ?: "列车"
-                    
                    val latStr = String.format("%.4f", point.latitude)
                    val lonStr = String.format("%.4f", point.longitude)
                    val coordStr = "${latStr}°N, ${lonStr}°E"
@@ -574,8 +583,8 @@ fun Context.getCompactMarkerDrawable(color: Int): Drawable {


 private fun Int.directionText(): String = when (this) {
-    1 -> "↓"
-    3 -> "↑"
+    1 -> "下行"
+    3 -> "上行"
    else -> "?"
 }

@@ -585,50 +594,143 @@ private fun TrainMarkerDialog(
    position: GeoPoint?,
    onDismiss: () -> Unit
 ) {
+    val recordMap = record.toMap()
+    
+    val displayItems = recordMap.filterKeys { 
+        it !in setOf("train", "direction", "time") 
+    }.toList()
+    
    AlertDialog(
        onDismissRequest = onDismiss,
        title = {
-            
-            val recordMap = record.toMap()
            Row(verticalAlignment = Alignment.CenterVertically) {
-                Text(text = recordMap["train"]?.toString() ?: "列车", style = MaterialTheme.typography.titleLarge)
+                Text(
+                    text = recordMap["train"]?.toString() ?: "列车",
+                    style = MaterialTheme.typography.headlineSmall,
+                    modifier = Modifier.weight(1f)
+                )
                recordMap["direction"]?.let { direction ->
-                    Spacer(modifier = Modifier.width(8.dp))
                    Text(
-                        text = direction,
-                        style = MaterialTheme.typography.bodyMedium,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                        text = (direction as? Int)?.directionText() ?: direction.toString(),
+                        style = MaterialTheme.typography.bodyMedium.copy(
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            fontSize = 12.sp
+                        ),
+                        modifier = Modifier.padding(start = 8.dp)
                    )
                }
            }
        },
        text = {
-            Column {
-                
-                record.toMap().forEach { (key, value) ->
-                    if (key != "train" && key != "direction") {
+            Column(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .verticalScroll(rememberScrollState())
+                    .padding(vertical = 8.dp)
+            ) {
+                displayItems.forEach { (key, value) ->
+                    Row(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(vertical = 4.dp),
+                        horizontalArrangement = Arrangement.SpaceBetween
+                    ) {
+                        val title = when (key) {
+                            "speed" -> "速度"
+                            "position" -> "位置"
+                            "time" -> "时间"
+                            "loco" -> "机车号"
+                            "loco_type" -> "机车型号"
+                            "route" -> "线路"
+                            "rssi" -> "信号强度"
+                            "timestamp" -> "时间"
+                            "receivedTimestamp" -> "接收时间"
+                            else -> key
+                        }
+                        
                        Text(
-                            text = value,
-                            style = MaterialTheme.typography.bodyMedium,
-                            modifier = Modifier.padding(vertical = 2.dp)
+                            text = title,
+                            style = MaterialTheme.typography.titleMedium
+                        )
+                        Text(
+                            text = value.toString(),
+                            style = MaterialTheme.typography.bodyMedium
                        )
                    }
                }
                
-                
                position?.let {
-                    Spacer(modifier = Modifier.height(4.dp))
-                    Text(
-                        text = "坐标: ${String.format("%.6f", it.latitude)}, ${String.format("%.6f", it.longitude)}",
-                        style = MaterialTheme.typography.bodyMedium
-                    )
+                    Row(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(vertical = 4.dp),
+                        horizontalArrangement = Arrangement.SpaceBetween
+                    ) {
+                        Text(
+                            text = "坐标信息",
+                            style = MaterialTheme.typography.titleMedium
+                        )
+                        Text(
+                            text = "${String.format("%.6f", it.latitude)}, ${String.format("%.6f", it.longitude)}",
+                            style = MaterialTheme.typography.bodyMedium
+                        )
+                    }
                }
            }
        },
        confirmButton = {
            TextButton(onClick = onDismiss) {
-                Text("确定")
+                Text("关闭")
            }
        }
    )
+}
+
+@Composable
+private fun InfoSection(title: String, items: List<Pair<String, String>>) {
+    Column(modifier = Modifier.fillMaxWidth()) {
+        Text(
+            text = title,
+            style = MaterialTheme.typography.titleMedium,
+            modifier = Modifier.padding(bottom = 4.dp)
+        )
+        Card(
+            colors = CardDefaults.cardColors(
+                containerColor = MaterialTheme.colorScheme.surfaceVariant
+            ),
+            modifier = Modifier.fillMaxWidth()
+        ) {
+            Column(modifier = Modifier.padding(12.dp)) {
+                items.forEach { (key, value) ->
+                    Row(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(vertical = 2.dp),
+                        horizontalArrangement = Arrangement.SpaceBetween
+                    ) {
+                        Text(
+                            text = value.toString(),
+                            style = MaterialTheme.typography.bodyMedium
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun InfoSectionSimple(title: String, items: List<Pair<String, String>>) {
+    Column(modifier = Modifier.fillMaxWidth().padding(vertical = 4.dp)) {
+        Text(
+            text = title,
+            style = MaterialTheme.typography.titleMedium
+        )
+        items.forEach { (key, value) ->
+            Text(
+                text = value.toString(),
+                style = MaterialTheme.typography.bodyMedium
+            )
+        }
+    }
 }
--- a/app/src/main/java/org/noxylva/lbjconsole/ui/screens/MonitorScreen.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/ui/screens/MonitorScreen.kt
@@ -1,308 +0,0 @@
-package org.noxylva.lbjconsole.ui.screens
-
-import androidx.compose.animation.*
-import androidx.compose.animation.core.*
-import androidx.compose.foundation.clickable
-
-import androidx.compose.foundation.interaction.MutableInteractionSource
-import androidx.compose.foundation.layout.*
-import androidx.compose.material.ripple.rememberRipple
-import androidx.compose.material3.*
-import androidx.compose.runtime.*
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.graphicsLayer
-import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.unit.TextUnit
-import androidx.compose.ui.unit.dp
-import androidx.compose.ui.unit.sp
-import kotlinx.coroutines.delay
-import org.noxylva.lbjconsole.model.TrainRecord
-import org.noxylva.lbjconsole.ui.components.TrainDetailDialog
-import java.text.SimpleDateFormat
-import java.util.*
-
-@Composable
-fun MonitorScreen(
-    latestRecord: TrainRecord?,
-    recentRecords: List<TrainRecord>,
-    lastUpdateTime: Date?,
-    temporaryStatusMessage: String? = null,
-    onRecordClick: (TrainRecord) -> Unit,
-    onClearLog: () -> Unit
-) {
-    var showDetailDialog by remember { mutableStateOf(false) }
-    var selectedRecord by remember { mutableStateOf<TrainRecord?>(null) }
-    var isPressed by remember { mutableStateOf(false) }
-    
-    val scale by animateFloatAsState(
-        targetValue = if (isPressed) 0.98f else 1f,
-        animationSpec = tween(durationMillis = 120),
-        label = "content_scale"
-    )
-    
-    LaunchedEffect(isPressed) {
-        if (isPressed) {
-            delay(100)
-            isPressed = false
-        }
-    }
-    
-    
-    val timeSinceLastUpdate = remember { mutableStateOf<String?>(null) }
-    LaunchedEffect(key1 = lastUpdateTime) {
-        if (lastUpdateTime != null) {
-            while (true) {
-                val now = Date()
-                val diffInSec = (now.time - lastUpdateTime.time) / 1000
-                timeSinceLastUpdate.value = when {
-                    diffInSec < 60 -> "${diffInSec}秒前"
-                    diffInSec < 3600 -> "${diffInSec / 60}分钟前"
-                    else -> "${diffInSec / 3600}小时前"
-                }
-                val updateInterval = if (diffInSec < 60) 500L else if (diffInSec < 3600) 30000L else 300000L
-                delay(updateInterval)
-            }
-        }
-    }
-    
-    
-    Box(modifier = Modifier.fillMaxSize().padding(16.dp)) {
-        Card(modifier = Modifier.fillMaxSize()) {
-            Column(
-                modifier = Modifier
-                    .fillMaxSize()
-                    .padding(20.dp)
-            ) {
-                
-                Row(
-                    modifier = Modifier.fillMaxWidth(),
-                    horizontalArrangement = Arrangement.End,
-                    verticalAlignment = Alignment.CenterVertically
-                ) {
-                    Text(
-                        text = timeSinceLastUpdate.value ?: "暂无数据",
-                        fontSize = 14.sp,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant
-                    )
-                }
-                
-                Spacer(modifier = Modifier.height(16.dp))
-                
-                
-                Box(
-                    modifier = Modifier
-                        .fillMaxWidth()
-                        .weight(1f)
-                ) {
-                    AnimatedContent(
-                        targetState = latestRecord,
-                        transitionSpec = {
-                            fadeIn(
-                                animationSpec = tween(
-                                    durationMillis = 300,
-                                    easing = FastOutSlowInEasing
-                                )
-                            ) + slideInVertically(
-                                initialOffsetY = { it / 4 },
-                                animationSpec = tween(
-                                    durationMillis = 300,
-                                    easing = FastOutSlowInEasing
-                                )
-                            ) togetherWith fadeOut(
-                                animationSpec = tween(
-                                    durationMillis = 150,
-                                    easing = FastOutLinearInEasing
-                                )
-                            ) + slideOutVertically(
-                                targetOffsetY = { -it / 4 },
-                                animationSpec = tween(
-                                    durationMillis = 150,
-                                    easing = FastOutLinearInEasing
-                                )
-                            )
-                        },
-                        label = "content_animation"
-                    ) { record ->
-                        if (record != null) {
-                        
-                        Column(
-                            modifier = Modifier
-                                .fillMaxWidth()
-                                .clickable(
-                                    interactionSource = remember { MutableInteractionSource() },
-                                    indication = rememberRipple(bounded = true)
-                                ) {
-                                    isPressed = true
-                                    selectedRecord = record
-                                    showDetailDialog = true
-                                    onRecordClick(record)
-                                }
-                                .padding(8.dp)
-                                .graphicsLayer {
-                                    scaleX = scale
-                                    scaleY = scale
-                                }
-                        ) {
-                            
-                            val recordMap = record.toMap()
-                            
-                            
-                            Row(
-                                modifier = Modifier.fillMaxWidth(),
-                                horizontalArrangement = Arrangement.SpaceBetween
-                            ) {
-                                Text(
-                                    text = recordMap["train"]?.toString() ?: "",
-                                    fontWeight = FontWeight.Bold,
-                                    fontSize = 20.sp,
-                                    color = MaterialTheme.colorScheme.primary
-                                )
-                                
-                                Text(
-                                    text = recordMap["direction"]?.toString() ?: "",
-                                    fontWeight = FontWeight.Bold,
-                                    fontSize = 16.sp,
-                                    color = when(recordMap["direction"]?.toString()) {
-                                        "上行" -> MaterialTheme.colorScheme.primary
-                                        "下行" -> MaterialTheme.colorScheme.secondary
-                                        else -> MaterialTheme.colorScheme.onSurface
-                                    }
-                                )
-                            }
-                            
-                            Spacer(modifier = Modifier.height(6.dp))
-                            
-                            
-                            if (recordMap.containsKey("time")) {
-                                recordMap["time"]?.split("\n")?.forEach { timeLine ->
-                                    Text(
-                                        text = timeLine,
-                                        fontSize = 14.sp,
-                                        color = MaterialTheme.colorScheme.onSurfaceVariant
-                                    )
-                                    Spacer(modifier = Modifier.height(4.dp))
-                                }
-                            }
-                            
-                            HorizontalDivider(thickness = 0.5.dp)
-                            Spacer(modifier = Modifier.height(8.dp))
-                            
-                            
-                            Row(
-                                modifier = Modifier.fillMaxWidth(),
-                                horizontalArrangement = Arrangement.SpaceBetween
-                            ) {
-                                recordMap["speed"]?.let { speed ->
-                                    Text(
-                                        text = speed,
-                                        fontSize = 14.sp,
-                                        color = MaterialTheme.colorScheme.onSurface
-                                    )
-                                }
-                                recordMap["position"]?.let { position ->
-                                    Text(
-                                        text = position,
-                                        fontSize = 14.sp,
-                                        color = MaterialTheme.colorScheme.onSurface
-                                    )
-                                }
-                            }
-                            Spacer(modifier = Modifier.height(8.dp))
-                            
-                            
-                            Row(
-                                modifier = Modifier.fillMaxWidth()
-                            ) {
-                                Column(modifier = Modifier.fillMaxWidth()) {
-                                    recordMap.forEach { (key, value) ->
-                                        when (key) {
-                                            "timestamp", "train", "direction", "time", "speed", "position", "position_info" -> {}
-                                            else -> {
-                                                Text(
-                                                    text = value,
-                                                    fontSize = 14.sp,
-                                                    color = MaterialTheme.colorScheme.onSurface
-                                                )
-                                                Spacer(modifier = Modifier.height(4.dp))
-                                            }
-                                        }
-                                    }
-                                    
-                                    
-                                    if (recordMap.containsKey("position_info")) {
-                                        Spacer(modifier = Modifier.height(4.dp))
-                                        Text(
-                                            text = recordMap["position_info"] ?: "",
-                                            fontSize = 14.sp,
-                                            color = MaterialTheme.colorScheme.onSurface
-                                        )
-                                    }
-                                }
-                            }
-                        }
-                    } else {
-                        
-                        Box(
-                            modifier = Modifier.fillMaxSize(),
-                            contentAlignment = Alignment.Center
-                        ) {
-                            Column(horizontalAlignment = Alignment.CenterHorizontally) {
-                                Text(
-                                    "暂无列车信息",
-                                    style = MaterialTheme.typography.titleLarge,
-                                    color = MaterialTheme.colorScheme.outline
-                                )
-                                
-                                if (lastUpdateTime != null) {
-                                    Spacer(modifier = Modifier.height(8.dp))
-                                    Text(
-                                        "上次接收数据: ${SimpleDateFormat("HH:mm:ss", Locale.getDefault()).format(lastUpdateTime)}",
-                                        style = MaterialTheme.typography.bodyMedium,
-                                        color = MaterialTheme.colorScheme.outline.copy(alpha = 0.7f)
-                                    )
-                                }
-                            }
-                        }
-                    }
-                    }
-                }
-                
-            }
-        }
-    }
-    
-    
-    if (showDetailDialog && selectedRecord != null) {
-        TrainDetailDialog(
-            trainRecord = selectedRecord!!,
-            onDismiss = { showDetailDialog = false }
-        )
-    }
-}
-
-@Composable
-private fun InfoItem(
-    label: String,
-    value: String,
-    fontSize: TextUnit = 14.sp
-) {
-    Row(
-        modifier = Modifier
-            .fillMaxWidth()
-            .padding(vertical = 2.dp)
-    ) {
-        Text(
-            text = "$label: ",
-            fontWeight = FontWeight.Medium,
-            fontSize = fontSize,
-            color = MaterialTheme.colorScheme.onSurfaceVariant
-        )
-        
-        Text(
-            text = value,
-            fontSize = fontSize,
-            color = MaterialTheme.colorScheme.onSurface
-        )
-    }
-}
--- a/app/src/main/java/org/noxylva/lbjconsole/ui/screens/SettingsScreen.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/ui/screens/SettingsScreen.kt
@@ -15,7 +15,7 @@ import androidx.compose.ui.platform.LocalUriHandler
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
-import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
 import org.noxylva.lbjconsole.model.MergeSettings
 import org.noxylva.lbjconsole.model.GroupBy
 import org.noxylva.lbjconsole.model.TimeWindow
@@ -24,7 +24,7 @@ import org.noxylva.lbjconsole.BackgroundService
 import org.noxylva.lbjconsole.NotificationService
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
-import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.DisposableEffect

@OptIn(ExperimentalMaterial3Api::class)
@Composable
@@ -44,19 +44,14 @@ fun SettingsScreen(
    onAutoConnectEnabledChange: (Boolean) -> Unit = {}
 ) {
    val uriHandler = LocalUriHandler.current
-    val scrollState = rememberScrollState()
+    val scrollState = rememberScrollState(initial = scrollPosition)
    
-    LaunchedEffect(scrollPosition) {
-        if (scrollState.value != scrollPosition) {
-            scrollState.scrollTo(scrollPosition)
+    DisposableEffect(Unit) {
+        onDispose {
+            onScrollPositionChange(scrollState.value)
        }
    }
    
-    LaunchedEffect(scrollState.value) {
-        delay(50)
-        onScrollPositionChange(scrollState.value)
-    }
-    
    Column(
        modifier = Modifier
            .fillMaxSize()
@@ -199,11 +194,14 @@ fun SettingsScreen(
                
                val context = LocalContext.current
                val notificationService = remember(context) { NotificationService(context) }
-                
-                var backgroundServiceEnabled by remember(context) {
-                    mutableStateOf(SettingsActivity.isBackgroundServiceEnabled(context))
+
+                var backgroundServiceEnabled by remember { mutableStateOf<Boolean?>(null) }
+                val coroutineScope = rememberCoroutineScope()
+
+                LaunchedEffect(context) {
+                    backgroundServiceEnabled = SettingsActivity.isBackgroundServiceEnabled(context)
                }
-                
+
                var notificationEnabled by remember(context, notificationService) {
                    mutableStateOf(notificationService.isNotificationEnabled())
                }
@@ -225,19 +223,24 @@ fun SettingsScreen(
                            color = MaterialTheme.colorScheme.onSurfaceVariant
                        )
                    }
-                    Switch(
-                        checked = backgroundServiceEnabled,
-                        onCheckedChange = { enabled ->
-                            backgroundServiceEnabled = enabled
-                            SettingsActivity.setBackgroundServiceEnabled(context, enabled)
-                            
-                            if (enabled) {
-                                BackgroundService.startService(context)
-                            } else {
-                                BackgroundService.stopService(context)
+                    if (backgroundServiceEnabled == null) {
+                        CircularProgressIndicator(modifier = Modifier.size(24.dp))
+                    } else {
+                        Switch(
+                            checked = backgroundServiceEnabled!!,
+                            onCheckedChange = { enabled ->
+                                backgroundServiceEnabled = enabled
+                                coroutineScope.launch {
+                                    SettingsActivity.setBackgroundServiceEnabled(context, enabled)
+                                    if (enabled) {
+                                        BackgroundService.startService(context)
+                                    } else {
+                                        BackgroundService.stopService(context)
+                                    }
+                                }
                            }
-                        }
-                    )
+                        )
+                    }
                }
                
                Row(
@@ -435,4 +438,4 @@ fun SettingsScreen(
                 .padding(12.dp)
         )
    }
-}
+}
--- a/app/src/main/java/org/noxylva/lbjconsole/util/LocationUtils.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/util/LocationUtils.kt
@@ -4,8 +4,8 @@ import android.util.Log
 import org.osmdroid.util.GeoPoint


-object LocationUtils {
-    private const val TAG = "LocationUtils"
+object LocationUtil {
+    private const val TAG = "LocationUtil"

    
    fun parsePositionInfo(positionInfo: String): GeoPoint? {
@@ -52,7 +52,7 @@ object LocationUtils {
            
            val minuteEndIndex = dmsString.indexOf('′')
            if (minuteEndIndex == -1) {
-                return degrees
+                return null
            }
            
            val minutes = dmsString.substring(degreeIndex + 1, minuteEndIndex).toDouble()
--- a/app/src/main/java/org/noxylva/lbjconsole/util/LocoTypeUtil.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/util/LocoTypeUtil.kt
@@ -0,0 +1,42 @@
+package org.noxylva.lbjconsole.util
+
+import android.content.Context
+import java.io.BufferedReader
+import java.io.InputStreamReader
+
+class LocoTypeUtil(private val context: Context) {
+    private val locoTypeMap = mutableMapOf<String, String>()
+    
+    init {
+        loadLocoTypeMapping()
+    }
+    
+    private fun loadLocoTypeMapping() {
+        try {
+            context.assets.open("loco_type_info.csv").use { inputStream ->
+                BufferedReader(InputStreamReader(inputStream)).use { reader ->
+                    reader.lines().forEach { line ->
+                        val parts = line.split(",")
+                        if (parts.size >= 2) {
+                            val code = parts[0].trim()
+                            val type = parts[1].trim()
+                            locoTypeMap[code] = type
+                        }
+                    }
+                }
+            }
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
+    }
+    
+    fun getLocoTypeByCode(code: String): String? {
+        return locoTypeMap[code]
+    }
+    
+    fun getLocoTypeByLocoNumber(locoNumber: String): String? {
+        if (locoNumber.length < 3) return null
+        val prefix = locoNumber.take(3)
+        return getLocoTypeByCode(prefix)
+    }
+}
--- a/app/src/main/java/org/noxylva/lbjconsole/util/TrainTypeUtil.kt
+++ b/app/src/main/java/org/noxylva/lbjconsole/util/TrainTypeUtil.kt
@@ -0,0 +1,66 @@
+package org.noxylva.lbjconsole.util
+
+import android.content.Context
+import java.io.BufferedReader
+import java.io.InputStreamReader
+import java.util.regex.Pattern
+
+class TrainTypeUtil(private val context: Context) {
+    private val trainTypePatterns = mutableListOf<Pair<Pattern, String>>()
+    
+    init {
+        loadTrainTypePatterns()
+    }
+    
+    private fun loadTrainTypePatterns() {
+        try {
+            val inputStream = context.assets.open("train_number_info.csv")
+            val reader = BufferedReader(InputStreamReader(inputStream))
+            
+            reader.useLines { lines ->
+                lines.forEach { line ->
+                    if (line.isNotBlank()) {
+                        val firstQuoteEnd = line.indexOf('"', 1)
+                        if (firstQuoteEnd > 0 && firstQuoteEnd < line.length - 1) {
+                            val regex = line.substring(1, firstQuoteEnd)
+                            val remainingPart = line.substring(firstQuoteEnd + 1).trim()
+                            if (remainingPart.startsWith(",\"") && remainingPart.endsWith("\"")) {
+                                val type = remainingPart.substring(2, remainingPart.length - 1)
+                                try {
+                                    val pattern = Pattern.compile(regex)
+                                    trainTypePatterns.add(Pair(pattern, type))
+                                } catch (e: Exception) {
+                                    e.printStackTrace()
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
+    }
+    
+    fun getTrainType(locoType: String, train: String): String? {
+        if (train.isEmpty()) {
+            return null
+        }
+        
+        val actualTrain = if (locoType == "NA") {
+            train
+        } else {
+            locoType + train
+        }
+        
+        for ((pattern, type) in trainTypePatterns) {
+            if (pattern.matcher(actualTrain).matches()) {
+                return type
+            }
+        }
+        
+        return null
+    }
+    
+
+}
--- a/app/src/main/res/drawable/ic_launcher_background.xml
+++ b/app/src/main/res/drawable/ic_launcher_background.xml
--- a/app/src/main/res/drawable/ic_launcher_foreground.xml
+++ b/app/src/main/res/drawable/ic_launcher_foreground.xml
--- a/app/src/main/res/drawable/ic_notification.xml
+++ b/app/src/main/res/drawable/ic_notification.xml
--- a/app/src/main/res/drawable/ic_person.xml
+++ b/app/src/main/res/drawable/ic_person.xml
--- a/app/src/main/res/layout/activity_settings.xml
+++ b/app/src/main/res/layout/activity_settings.xml
--- a/app/src/main/res/layout/notification_train_record.xml
+++ b/app/src/main/res/layout/notification_train_record.xml
--- a/app/src/main/res/mipmap-anydpi/ic_launcher.xml
+++ b/app/src/main/res/mipmap-anydpi/ic_launcher.xml
--- a/app/src/main/res/mipmap-anydpi/ic_launcher_round.xml
+++ b/app/src/main/res/mipmap-anydpi/ic_launcher_round.xml
--- a/app/src/main/res/mipmap-hdpi/ic_launcher.webp
+++ b/app/src/main/res/mipmap-hdpi/ic_launcher.webp
--- a/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp
+++ b/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp
--- a/app/src/main/res/mipmap-mdpi/ic_launcher.webp
+++ b/app/src/main/res/mipmap-mdpi/ic_launcher.webp
--- a/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp
+++ b/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp
--- a/app/src/main/res/mipmap-xhdpi/ic_launcher.webp
+++ b/app/src/main/res/mipmap-xhdpi/ic_launcher.webp
--- a/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp
+++ b/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp
--- a/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp
+++ b/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp
--- a/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp
+++ b/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp
--- a/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp
+++ b/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp
--- a/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp
+++ b/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp
--- a/app/src/main/res/raw/loco_info.csv
+++ b/app/src/main/res/raw/loco_info.csv
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
--- a/app/src/main/res/values/themes.xml
+++ b/app/src/main/res/values/themes.xml
--- a/app/src/main/res/xml/backup_rules.xml
+++ b/app/src/main/res/xml/backup_rules.xml
--- a/app/src/main/res/xml/data_extraction_rules.xml
+++ b/app/src/main/res/xml/data_extraction_rules.xml
--- a/app/src/main/res/xml/file_paths.xml
+++ b/app/src/main/res/xml/file_paths.xml
--- a/gradle.properties
+++ b/gradle.properties
@@ -20,4 +20,4 @@ kotlin.code.style=official
 # Enables namespacing of each library's R class so that its R class includes only the
 # resources declared in the library itself and none from the library's dependencies,
 # thereby reducing the size of the R class for that library
-android.nonTransitiveRClass=true
+android.nonTransitiveRClass=true
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -8,6 +8,8 @@ espressoCore = "3.6.1"
 lifecycleRuntimeKtx = "2.9.0"
 activityCompose = "1.10.1"
 composeBom = "2024.04.01"
+room = "2.6.1"
+startup = "1.1.1"

 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
@@ -24,9 +26,14 @@ androidx-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-toolin
 androidx-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
 androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
 androidx-material3 = { group = "androidx.compose.material3", name = "material3" }
+androidx-room-runtime = { group = "androidx.room", name = "room-runtime", version.ref = "room" }
+androidx-room-compiler = { group = "androidx.room", name = "room-compiler", version.ref = "room" }
+androidx-room-ktx = { group = "androidx.room", name = "room-ktx", version.ref = "room" }
+androidx-startup-runtime = { group = "androidx.startup", name = "startup-runtime", version.ref = "startup" }

 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
 kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
 kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
+ksp = { id = "com.google.devtools.ksp", version = "2.0.0-1.0.21" }

--- a/0
+++ b/0
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -19,6 +19,6 @@ dependencyResolutionManagement {
    }
 }

-rootProject.name = "LBJ Receiver"
+rootProject.name = "LBJ_Console"
 include(":app")
Author	SHA1	Message	Date
Nedifinita	0bf7033c6c	feat: update locomotive type support and optimized position display format	2025-08-19 19:11:52 +08:00
Nedifinita	0f98b6bcf7	refactor: optimize train record merging logic	2025-08-19 18:06:02 +08:00
Nedifinita	8894a73999	fix: optimize the display logic of history item spacing	2025-08-19 17:43:21 +08:00
Nedifinita	cd4b58e16b	fix: correct the default value handling issue when the train display is empty	2025-08-19 17:03:09 +08:00
Nedifinita	39effddfc1	feat: add LocoTypeUtil	2025-08-19 16:35:47 +08:00
undef-i	c4b06f3b3c	fix: typo	2025-08-17 14:24:54 +08:00
Nedifinita	eb33fa7feb	chore: update project name and .gitignore file	2025-08-08 19:20:26 +08:00
undef-i	65bf7b52c6	fix: correct the error in train_number_info.csv	2025-08-05 20:43:16 +08:00
undef-i	4278de2a8d	fix: correct incorrect rendering and status of map marker points	2025-08-03 18:40:14 +08:00
Nedifinita	59e9987d7f	feat: add train type recognition and restructure settings storage	2025-08-01 20:07:35 +08:00
Nedifinita	4e97dcafd7	fix: hide duplicate info when train and loco both match	2025-08-01 17:51:24 +08:00
Nedifinita	4cad3679a9	fix: improve TRAIN_OR_LOCO merge display and settings scroll	2025-08-01 17:44:26 +08:00
Nedifinita	e6e7831b96	refactor: migrate data storage from SharedPreferences to Room database	2025-08-01 17:36:04 +08:00