feat: add database import and export functions

.gitignore

@@ -19,4 +19,148 @@ local.properties
 *.keystore
 *.base64
 docs
-gradle.properties
+linux
+windows
+flutter/ephemeral/
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+x64/
+x86/
+*.[Cc]ache
+!*.[Cc]ache/
+.gradle/
+build/
+local.properties
+*.log
+captures/
+.externalNativeBuild/
+.cxx/
+*.apk
+output.json
+*.iml
+.idea/
+misc.xml
+deploymentTargetDropDown.xml
+render.experimental.xml
+*.jks
+*.keystore
+google-services.json
+*.hprof
+gen-external-apklibs
+**/doc/api/
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.fvm/flutter_sdk
+.packages
+.pub-cache/
+.pub/
+coverage/
+lib/generated_plugin_registrant.dart
+**/android/**/gradle-wrapper.jar
+**/android/.gradle
+**/android/captures/
+**/android/gradlew
+**/android/gradlew.bat
+**/android/key.properties
+**/android/local.properties
+**/android/**/GeneratedPluginRegistrant.java
+**/ios/**/*.mode1v3
+**/ios/**/*.mode2v3
+**/ios/**/*.moved-aside
+**/ios/**/*.pbxuser
+**/ios/**/*.perspectivev3
+**/ios/**/*sync/
+**/ios/**/.sconsign.dblite
+**/ios/**/.tags*
+**/ios/**/.vagrant/
+**/ios/**/DerivedData/
+**/ios/**/Icon?
+**/ios/**/Pods/
+**/ios/**/.symlinks/
+**/ios/**/profile
+**/ios/**/xcuserdata
+**/ios/.generated/
+**/ios/Flutter/.last_build_id
+**/ios/Flutter/App.framework
+**/ios/Flutter/Flutter.framework
+**/ios/Flutter/Flutter.podspec
+**/ios/Flutter/Generated.xcconfig
+**/ios/Flutter/app.flx
+**/ios/Flutter/app.zip
+**/ios/Flutter/flutter_assets/
+**/ios/Flutter/flutter_export_environment.sh
+**/ios/ServiceDefinitions.json
+**/ios/Runner/GeneratedPluginRegistrant.*
+!**/ios/**/default.mode1v3
+!**/ios/**/default.mode2v3
+!**/ios/**/default.pbxuser
+!**/ios/**/default.perspectivev3
+!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages
+*.ap_
+*.aab
+*.dex
+*.class
+bin/
+gen/
+out/
+.gradle
+.signing/
+proguard/
+/*/build/
+/*/local.properties
+/*/out
+/*/*/build
+/*/*/production
+.navigation/
+*.ipr
+*~
+*.swp
+.externalNativeBuild
+obj/
+*.iws
+/out/
+.idea/caches/
+.idea/libraries/
+.idea/shelf/
+.idea/workspace.xml
+.idea/tasks.xml
+.idea/.name
+.idea/compiler.xml
+.idea/copyright/profiles_settings.xml
+.idea/encodings.xml
+.idea/misc.xml
+.idea/modules.xml
+.idea/scopes/scope_settings.xml
+.idea/dictionaries
+.idea/vcs.xml
+.idea/jsLibraryMappings.xml
+.idea/datasources.xml
+.idea/dataSources.ids
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
+.idea/assetWizardSettings.xml
+.idea/gradle.xml
+.idea/jarRepositories.xml
+.idea/navEditor.xml
+.classpath
+.project
+.cproject
+.settings/
+.mtj.tmp/
+*.war
+*.ear
+hs_err_pid*
+.idea_modules/
+atlassian-ide-plugin.xml
+.idea/mongoSettings.xml
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+!/gradle/wrapper/gradle-wrapper.jar
+macos/Flutter/ephemeral/flutter_export_environment.sh
+macos/Flutter/ephemeral/Flutter-Generated.xcconfig

.idea/.name

@@ -1 +1 @@
-LBJ Receiver
+LBJ_Console

.idea/deploymentTargetSelector.xml

@@ -2,6 +2,12 @@
 <project version="4">
   <component name="deploymentTargetSelector">
     <selectionStates>
+      <SelectionState runConfigName="Unnamed">
+        <option name="selectionMode" value="DROPDOWN" />
+      </SelectionState>
+      <SelectionState runConfigName="lbjconsole_android">
+        <option name="selectionMode" value="DROPDOWN" />
+      </SelectionState>
       <SelectionState runConfigName="app">
         <option name="selectionMode" value="DROPDOWN" />
       </SelectionState>

README.md

@@ -1,16 +1,17 @@
 # LBJ Console
 
-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) device 设备接收并显示列车预警消息，功能包括：
+LBJ Console 是一款应用程序，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。
-- 显示预警消息的 GPS 信息于地图。
-- 基于内置数据文件显示机车配属和车次类型。
-
+- 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。
 
+主分支目前只适配了 Android 。如需在其它平台上面使用，请参考 [flutter](https://github.com/undef-i/LBJ_Console/tree/flutter) 分支自行编译。
 ## 数据文件
 
 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`。
 
 

app/build.gradle.kts

@@ -13,8 +13,8 @@ android {
         applicationId = "org.noxylva.lbjconsole"
         minSdk = 29
         targetSdk = 35
-        versionCode = 10
-        versionName = "0.1.1"
+        versionCode = 14
+        versionName = "0.1.4"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -92,4 +92,5 @@ dependencies {
     implementation(libs.androidx.room.ktx)
     ksp(libs.androidx.room.compiler)
     implementation(libs.androidx.startup.runtime)
+    implementation("com.google.code.gson:gson:2.10.1")
 }

app/src/main/AndroidManifest.xml

@@ -15,6 +15,9 @@
     <uses-permission android:name="android.permission.WAKE_LOCK" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" 
+        android:maxSdkVersion="32" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     
     <uses-feature android:name="android.hardware.bluetooth_le" android:required="true"/>
 
@@ -42,11 +45,10 @@
         </activity>
         
         <activity
-            android:name=".SettingsActivity"
+            android:name=".FilePickerActivity"
             android:exported="false"
-            android:label="Settings"
-            android:parentActivityName=".MainActivity"
-            android:theme="@style/Theme.LBJConsole" />
+            android:theme="@style/Theme.LBJConsole"
+            android:label="数据管理" />
         
         <service
             android:name=".BackgroundService"

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

app/src/main/assets/train_number_info.csv

@@ -26,8 +26,8 @@
 "^[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四字头"
-"^[Xx5]([0-8]\d{2}|9[0-8]\d|99[0-8])$","管内图定普通旅客快车五字头"
+"^[Uu4](00[1-9]|0[1-9]\d|[1-9]\d{2})$","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"
@@ -73,8 +73,8 @@
 "^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})$","动车组检测列车250管内"
-"^DJ[56]\d{3}$","动车组确认列车直通"
-"^DJ[78]\d{3}$","动车组确认列车管内"
+"^DJ[56]\d{3}$","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"

app/src/main/java/org/noxylva/lbjconsole/FilePickerActivity.kt

@@ -0,0 +1,123 @@
+package org.noxylva.lbjconsole
+
+import android.app.Activity
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.runtime.rememberCoroutineScope
+import kotlinx.coroutines.launch
+import org.noxylva.lbjconsole.util.DatabaseExportImportUtil
+
+class FilePickerActivity : ComponentActivity() {
+    private val exportFilePicker = registerForActivityResult(
+        ActivityResultContracts.CreateDocument("application/json")
+    ) { uri ->
+        uri?.let { exportDatabase(it) }
+    }
+
+    private val importFilePicker = registerForActivityResult(
+        ActivityResultContracts.OpenDocument()
+    ) { uri ->
+        uri?.let { importDatabase(it) }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        
+        val action = intent.getStringExtra("action") ?: "export"
+        
+        setContent {
+            val coroutineScope = rememberCoroutineScope()
+            
+            when (action) {
+                "export" -> {
+                    val fileName = "lbj_console_backup_${System.currentTimeMillis()}.json"
+                    exportFilePicker.launch(fileName)
+                }
+                "import" -> {
+                    importFilePicker.launch(arrayOf("application/json", "text/plain"))
+                }
+            }
+        }
+    }
+
+    private fun exportDatabase(uri: Uri) {
+        val coroutineScope = kotlinx.coroutines.MainScope()
+        coroutineScope.launch {
+            try {
+                val databaseUtil = DatabaseExportImportUtil(this@FilePickerActivity)
+                val json = databaseUtil.exportDatabase()
+                
+                contentResolver.openOutputStream(uri)?.use { outputStream ->
+                    outputStream.write(json.toByteArray())
+                }
+                
+                Toast.makeText(
+                    this@FilePickerActivity,
+                    "数据导出成功",
+                    Toast.LENGTH_SHORT
+                ).show()
+                
+            } catch (e: Exception) {
+                Toast.makeText(
+                    this@FilePickerActivity,
+                    "导出失败: ${e.message}",
+                    Toast.LENGTH_SHORT
+                ).show()
+            } finally {
+                finish()
+            }
+        }
+    }
+
+    private fun importDatabase(uri: Uri) {
+        val coroutineScope = kotlinx.coroutines.MainScope()
+        coroutineScope.launch {
+            try {
+                val databaseUtil = DatabaseExportImportUtil(this@FilePickerActivity)
+                val success = databaseUtil.importDatabase(uri)
+                
+                if (success) {
+                    Toast.makeText(
+                        this@FilePickerActivity,
+                        "数据导入成功",
+                        Toast.LENGTH_SHORT
+                    ).show()
+                } else {
+                    Toast.makeText(
+                        this@FilePickerActivity,
+                        "数据导入失败",
+                        Toast.LENGTH_SHORT
+                    ).show()
+                }
+                
+            } catch (e: Exception) {
+                Toast.makeText(
+                    this@FilePickerActivity,
+                    "导入失败: ${e.message}",
+                    Toast.LENGTH_SHORT
+                ).show()
+            } finally {
+                finish()
+            }
+        }
+    }
+
+    companion object {
+        fun createExportIntent(context: android.content.Context): Intent {
+            return Intent(context, FilePickerActivity::class.java).apply {
+                putExtra("action", "export")
+            }
+        }
+
+        fun createImportIntent(context: android.content.Context): Intent {
+            return Intent(context, FilePickerActivity::class.java).apply {
+                putExtra("action", "import")
+            }
+        }
+    }
+}

app/src/main/java/org/noxylva/lbjconsole/MainActivity.kt

@@ -110,16 +110,14 @@ class MainActivity : ComponentActivity() {
     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)
     private var searchOrderList by mutableStateOf(listOf<String>())
@@ -185,10 +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) {
@@ -199,99 +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()
-        
-        lifecycleScope.launch {
-            if (SettingsActivity.isBackgroundServiceEnabled(this@MainActivity)) {
-                BackgroundService.startService(this@MainActivity)
-            }
-        }
-        
-        enableEdgeToEdge()
-        
-        WindowCompat.getInsetsController(window, window.decorView).apply {
-            isAppearanceLightStatusBars = false
-        }
         setContent {
             LBJConsoleTheme {
                 val scope = rememberCoroutineScope()
@@ -334,7 +256,6 @@ class MainActivity : ComponentActivity() {
                             Log.d(TAG, "Auto connect enabled: $enabled")
                         },
                         
-                        
                         latestRecord = latestRecord,
                         recentRecords = recentRecords,
                         lastUpdateTime = lastUpdateTime,
@@ -344,10 +265,11 @@ class MainActivity : ComponentActivity() {
                         },
                         onClearMonitorLog = {
                             recentRecords.clear()
+                            latestRecord = null
+                            lastUpdateTime = null
                             temporaryStatusMessage = null
                         },
                         
-                        
                         allRecords = trainRecordManager.getMixedRecords(),
                         mergedRecords = trainRecordManager.getMergedRecords(),
                         recordCount = trainRecordManager.getRecordCount(),
@@ -442,11 +364,7 @@ class MainActivity : ComponentActivity() {
                         },
                         appVersion = getAppVersion(),
                         locoInfoUtil = locoInfoUtil,
-                        trainTypeUtil = trainTypeUtil,
-                        onOpenSettings = {
-                            val intent = Intent(this@MainActivity, SettingsActivity::class.java)
-                            startActivity(intent)
-                        }
+                        trainTypeUtil = trainTypeUtil
                     )
                     
                     if (showConnectionDialog) {
@@ -499,7 +417,6 @@ class MainActivity : ComponentActivity() {
                         }
                     }
                     
-
                 }
             }
         }
@@ -582,7 +499,7 @@ 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 {
@@ -762,7 +679,7 @@ class MainActivity : ComponentActivity() {
                 val settings = appSettingsRepository.getSettings()
                 
                 settingsDeviceName = settings.deviceName
-                targetDeviceName = settingsDeviceName
+                targetDeviceName = settings.deviceName
                 currentTab = settings.currentTab
                 historyEditMode = settings.historyEditMode
                 
@@ -845,6 +762,13 @@ class MainActivity : ComponentActivity() {
         }
     }
     
+    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")
@@ -949,9 +873,7 @@ fun MainContent(
     mapCenterPosition: Pair<Double, Double>?,
     mapZoomLevel: Double,
     mapRailwayLayerVisible: Boolean,
-    onMapStateChange: (Pair<Double, Double>?, Double, Boolean) -> Unit,
-    
-    onOpenSettings: () -> Unit
+    onMapStateChange: (Pair<Double, Double>?, Double, Boolean) -> Unit
 ) {
     val statusColor = if (isConnected) Color(0xFF4CAF50) else Color(0xFFFF5722)
     

app/src/main/java/org/noxylva/lbjconsole/NotificationService.kt

@@ -92,7 +92,7 @@ class NotificationService(private val context: Context) {
                 context,
                 0,
                 intent,
-                PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+                PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_MUTABLE
             )
 
             val remoteViews = RemoteViews(context.packageName, R.layout.notification_train_record)
@@ -145,7 +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)

app/src/main/java/org/noxylva/lbjconsole/SettingsActivity.kt

@@ -1,66 +0,0 @@
-package org.noxylva.lbjconsole
-
-import android.content.Context
-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 {
-        suspend fun isBackgroundServiceEnabled(context: Context): Boolean {
-            val repository = AppSettingsRepository(context)
-            return repository.getSettings().backgroundServiceEnabled
-        }
-        
-        suspend fun setBackgroundServiceEnabled(context: Context, enabled: Boolean) {
-            val repository = AppSettingsRepository(context)
-            repository.updateBackgroundServiceEnabled(enabled)
-        }
-    }
-    
-    private lateinit var backgroundServiceSwitch: Switch
-    private lateinit var appSettingsRepository: AppSettingsRepository
-    
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_settings)
-        
-        supportActionBar?.setDisplayHomeAsUpEnabled(true)
-        supportActionBar?.title = "Settings"
-        
-        appSettingsRepository = AppSettingsRepository(this)
-        
-        initViews()
-        setupListeners()
-    }
-    
-    private fun initViews() {
-        backgroundServiceSwitch = findViewById(R.id.switch_background_service)
-        lifecycleScope.launch {
-            backgroundServiceSwitch.isChecked = isBackgroundServiceEnabled(this@SettingsActivity)
-        }
-    }
-    
-    private fun setupListeners() {
-        backgroundServiceSwitch.setOnCheckedChangeListener { _, isChecked ->
-            lifecycleScope.launch {
-                setBackgroundServiceEnabled(this@SettingsActivity, isChecked)
-            }
-            
-            if (isChecked) {
-                BackgroundService.startService(this)
-            } else {
-                BackgroundService.stopService(this)
-            }
-        }
-    }
-    
-    override fun onSupportNavigateUp(): Boolean {
-        onBackPressed()
-        return true
-    }
-}

app/src/main/java/org/noxylva/lbjconsole/database/TrainDatabase.kt

@@ -9,7 +9,7 @@ import androidx.sqlite.db.SupportSQLiteDatabase
 
 @Database(
     entities = [TrainRecordEntity::class, AppSettingsEntity::class],
-    version = 3,
+    version = 4,
     exportSchema = false
 )
 abstract class TrainDatabase : RoomDatabase() {
@@ -54,13 +54,89 @@ abstract class TrainDatabase : RoomDatabase() {
             }
         }
         
+        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).build()
+                ).addMigrations(MIGRATION_1_2, MIGRATION_2_3, MIGRATION_3_4).build()
                 INSTANCE = instance
                 instance
             }

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=$speed, lbjClass='$lbjClass'")
+            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
     }

app/src/main/java/org/noxylva/lbjconsole/model/TrainRecordManager.kt

@@ -297,12 +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)
@@ -317,11 +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
@@ -331,7 +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()
@@ -341,38 +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

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
-        )
-    }
-}

app/src/main/java/org/noxylva/lbjconsole/ui/screens/HistoryScreen.kt

@@ -155,25 +155,38 @@ fun TrainRecordItem(
                     }
                 }
 
-                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"
@@ -206,13 +219,13 @@ 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 -> ""
@@ -227,7 +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(),
@@ -258,7 +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()
@@ -287,7 +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,
@@ -295,7 +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)),
@@ -528,18 +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"
@@ -572,13 +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 -> ""
@@ -593,7 +609,7 @@ fun MergedTrainRecordItem(
                     }
                 }
 
-                Spacer(modifier = Modifier.height(8.dp))
+                Spacer(modifier = Modifier.height(2.dp))
 
                 Row(
                     modifier = Modifier.fillMaxWidth(),
@@ -624,7 +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()
@@ -653,7 +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,
@@ -661,7 +677,7 @@ 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)),
@@ -782,14 +798,14 @@ fun MergedTrainRecordItem(
                                                 controller.setZoom(mapViewState.zoom)
                                                 controller.setCenter(mapViewState.center)
                                             } else if (allValidCoordinates.size > 1) {
-                                                val boundingBox = BoundingBox.fromGeoPoints(allValidCoordinates)
+                                                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, // Shift center UP (north) to create top padding
+                                                                boundingBox.center.latitude + latSpan * 0.25,
                                                                 boundingBox.center.longitude
                                                             )
                                                             val newZoom = zoomLevel - 1.0
@@ -805,7 +821,7 @@ fun MergedTrainRecordItem(
                                                 addOnLayoutChangeListener(layoutListener)
                                             } else if (allValidCoordinates.isNotEmpty()) {
                                                 val center = allValidCoordinates.first()
-                                                val zoom = 14.0
+                                                val zoom = 10.0
                                                 controller.setZoom(zoom)
                                                 controller.setCenter(center)
                                                 onMapViewStateChange(CardMapView(center, zoom))
@@ -907,12 +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
                                 )

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 {
+            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
+                        }
                         
-                record.toMap().forEach { (key, value) ->
-                    if (key != "train" && key != "direction") {
                         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
+            )
+        }
+    }
+}

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
-        )
-    }
-}

app/src/main/java/org/noxylva/lbjconsole/ui/screens/SettingsScreen.kt

@@ -1,5 +1,6 @@
 package org.noxylva.lbjconsole.ui.screens
 
+import android.content.Intent
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.shape.RoundedCornerShape
@@ -19,9 +20,10 @@ import kotlinx.coroutines.launch
 import org.noxylva.lbjconsole.model.MergeSettings
 import org.noxylva.lbjconsole.model.GroupBy
 import org.noxylva.lbjconsole.model.TimeWindow
-import org.noxylva.lbjconsole.SettingsActivity
+import org.noxylva.lbjconsole.database.AppSettingsRepository
 import org.noxylva.lbjconsole.BackgroundService
 import org.noxylva.lbjconsole.NotificationService
+import org.noxylva.lbjconsole.FilePickerActivity
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.runtime.DisposableEffect
@@ -199,7 +201,8 @@ fun SettingsScreen(
                 val coroutineScope = rememberCoroutineScope()
 
                 LaunchedEffect(context) {
-                    backgroundServiceEnabled = SettingsActivity.isBackgroundServiceEnabled(context)
+                    val repository = AppSettingsRepository(context)
+                    backgroundServiceEnabled = repository.getSettings().backgroundServiceEnabled
                 }
 
                 var notificationEnabled by remember(context, notificationService) {
@@ -231,7 +234,8 @@ fun SettingsScreen(
                             onCheckedChange = { enabled ->
                                 backgroundServiceEnabled = enabled
                                 coroutineScope.launch {
-                                    SettingsActivity.setBackgroundServiceEnabled(context, enabled)
+                                    val repository = AppSettingsRepository(context)
+                                    repository.updateBackgroundServiceEnabled(enabled)
                                     if (enabled) {
                                         BackgroundService.startService(context)
                                     } else {
@@ -424,6 +428,66 @@ fun SettingsScreen(
         }
         
 
+        Card(
+            modifier = Modifier.fillMaxWidth(),
+            colors = CardDefaults.cardColors(
+                containerColor = MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.3f)
+            ),
+            shape = RoundedCornerShape(16.dp)
+        ) {
+            Column(
+                modifier = Modifier.padding(20.dp),
+                verticalArrangement = Arrangement.spacedBy(16.dp)
+            ) {
+                Row(
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.spacedBy(12.dp)
+                ) {
+                    Icon(
+                        imageVector = Icons.Default.Storage,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.primary
+                    )
+                    Text(
+                        "数据管理",
+                        style = MaterialTheme.typography.titleMedium,
+                        fontWeight = FontWeight.SemiBold
+                    )
+                }
+                
+                val context = LocalContext.current
+                
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    horizontalArrangement = Arrangement.SpaceEvenly
+                ) {
+                    Button(
+                        onClick = {
+                            val intent = FilePickerActivity.createExportIntent(context)
+                            context.startActivity(intent)
+                        },
+                        modifier = Modifier.weight(1f).padding(horizontal = 4.dp)
+                    ) {
+                        Icon(Icons.Default.Upload, contentDescription = null)
+                        Spacer(Modifier.width(8.dp))
+                        Text("导出")
+                    }
+                    
+                    Button(
+                        onClick = {
+                            val intent = FilePickerActivity.createImportIntent(context)
+                            context.startActivity(intent)
+                        },
+                        modifier = Modifier.weight(1f).padding(horizontal = 4.dp)
+                    ) {
+                        Icon(Icons.Default.Download, contentDescription = null)
+                        Spacer(Modifier.width(8.dp))
+                        Text("导入")
+                    }
+                }
+            }
+        }
+        
         Text(
              text = "LBJ Console v$appVersion by undef-i",
              style = MaterialTheme.typography.bodySmall,

app/src/main/java/org/noxylva/lbjconsole/util/DatabaseExportImportUtil.kt

@@ -0,0 +1,67 @@
+package org.noxylva.lbjconsole.util
+
+import android.content.Context
+import android.net.Uri
+import android.util.Log
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.noxylva.lbjconsole.database.AppSettingsEntity
+import org.noxylva.lbjconsole.database.TrainDatabase
+import org.noxylva.lbjconsole.database.TrainRecordEntity
+import java.io.*
+import java.util.*
+import kotlin.coroutines.resume
+import kotlin.coroutines.resumeWithException
+import kotlin.coroutines.suspendCoroutine
+
+class DatabaseExportImportUtil(private val context: Context) {
+    private val gson = Gson()
+    private val database = TrainDatabase.getDatabase(context)
+
+    data class SimpleRecordBackup(
+        val records: List<TrainRecordEntity>
+    )
+
+    suspend fun exportDatabase(): String = withContext(Dispatchers.IO) {
+        try {
+            val trainRecords = database.trainRecordDao().getAllRecords()
+            
+            val backup = SimpleRecordBackup(
+                records = trainRecords
+            )
+            
+            val json = gson.toJson(backup)
+            json
+        } catch (e: Exception) {
+            Log.e("DatabaseExport", "导出失败", e)
+            throw e
+        }
+    }
+
+    suspend fun importDatabase(uri: Uri): Boolean = withContext(Dispatchers.IO) {
+        try {
+            context.contentResolver.openInputStream(uri)?.use { inputStream ->
+                val json = inputStream.bufferedReader().use { it.readText() }
+                val backup: SimpleRecordBackup = gson.fromJson(json, object : TypeToken<SimpleRecordBackup>() {}.type)
+                
+                database.trainRecordDao().deleteAllRecords()
+                
+                if (backup.records.isNotEmpty()) {
+                    database.trainRecordDao().insertRecords(backup.records)
+                }
+                
+                true
+            } ?: false
+        } catch (e: Exception) {
+            Log.e("DatabaseImport", "导入失败", e)
+            false
+        }
+    }
+
+    suspend fun getExportFileUri(): Uri {
+        val filePath = exportDatabase()
+        return Uri.parse("file://$filePath")
+    }
+}

app/src/main/java/org/noxylva/lbjconsole/util/LocationUtil.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()

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)
+    }
+}

app/src/main/res/drawable/ic_person.xml

@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24"
-    android:viewportHeight="24">
-    <path
-        android:fillColor="#FFFFFF"
-        android:pathData="M12,6m-4,0a4,4 0,1 1,8 0a4,4 0,1 1,-8 0" />
-    <path
-        android:fillColor="#FFFFFF"
-        android:pathData="M12,10L12,10c-2.2,0 -4,1.8 -4,4v6h8v-6C16,11.8 14.2,10 12,10z" />
-</vector>

app/src/main/res/layout/activity_settings.xml

@@ -1,55 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:orientation="vertical"
-    android:padding="16dp">
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:orientation="horizontal"
-        android:gravity="center_vertical"
-        android:padding="16dp"
-        android:background="?android:attr/selectableItemBackground"
-        android:clickable="true">
-
-        <LinearLayout
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:orientation="vertical">
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="Background Service"
-                android:textSize="16sp"
-                android:textColor="@android:color/black"
-                android:textStyle="bold" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="Keep app running in background"
-                android:textSize="14sp"
-                android:textColor="@android:color/darker_gray"
-                android:layout_marginTop="4dp" />
-
-        </LinearLayout>
-
-        <Switch
-            android:id="@+id/switch_background_service"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginStart="16dp" />
-
-    </LinearLayout>
-
-    <View
-        android:layout_width="match_parent"
-        android:layout_height="1dp"
-        android:background="@android:color/darker_gray"
-        android:layout_marginHorizontal="16dp" />
-
-</LinearLayout>