fix: read config from SharedPreferences and persist tracking state

android/app/src/main/kotlin/com/traccar/traccar_client/service/LocationTrackingService.kt

@@ -7,6 +7,7 @@ import android.app.PendingIntent
 import android.app.Service
 import android.content.Context
 import android.content.Intent
+import android.content.SharedPreferences
 import android.location.Location
 import android.os.Binder
 import android.os.Build
@@ -43,6 +44,7 @@ class LocationTrackingService : Service() {
     private lateinit var database: AppDatabase
     private lateinit var httpClient: TraccarHttpClient
     private lateinit var connectivityReceiver: ConnectivityReceiver
+    private lateinit var prefs: SharedPreferences
 
     private var wakeLock: PowerManager.WakeLock? = null
     private var isTracking = false
@@ -56,6 +58,7 @@ class LocationTrackingService : Service() {
 
     override fun onCreate() {
         super.onCreate()
+        prefs = getSharedPreferences("traccar_prefs", Context.MODE_PRIVATE)
         fusedLocationProvider = FusedLocationProvider(this)
         distanceFilterProcessor = DistanceFilterProcessor()
         heartbeatScheduler = HeartbeatScheduler(this)
@@ -89,7 +92,17 @@ class LocationTrackingService : Service() {
     fun startTracking() {
         if (isTracking) return
 
-        val config = currentConfig ?: TrackingConfig()
+        val config = TrackingConfig(
+            serverUrl = prefs.getString("server_url", "https://demo.traccar.org") ?: "https://demo.traccar.org",
+            deviceId = prefs.getString("device_id", "") ?: "",
+            accuracy = prefs.getInt("accuracy", 0),
+            interval = prefs.getInt("interval", 300),
+            fastestInterval = prefs.getInt("fastest_interval", 30),
+            distanceFilter = prefs.getInt("distance_filter", 75),
+            heartbeat = prefs.getInt("heartbeat", 60),
+            offlineBuffer = prefs.getBoolean("offline_buffer", true),
+            stopDetection = prefs.getBoolean("stop_detection", true)
+        )
         currentConfig = config
 
         acquireWakeLock()
@@ -97,6 +110,7 @@ class LocationTrackingService : Service() {
 
         isTracking = true
         distanceFilterProcessor.reset()
+        prefs.edit().putBoolean("tracking_active", true).apply()
 
         fusedLocationProvider.startLocationUpdates(
             interval = config.interval * 1000L,
@@ -119,6 +133,7 @@ class LocationTrackingService : Service() {
         if (!isTracking) return
 
         isTracking = false
+        prefs.edit().putBoolean("tracking_active", false).apply()
         fusedLocationProvider.stopLocationUpdates()
         heartbeatScheduler.cancelHeartbeat()
         releaseWakeLock()
@@ -176,6 +191,17 @@ class LocationTrackingService : Service() {
             "timestamp" to location.time
         ))
 
+        prefs.edit().apply {
+            putFloat("last_latitude", location.latitude.toFloat())
+            putFloat("last_longitude", location.longitude.toFloat())
+            if (location.hasAccuracy()) putFloat("last_accuracy", location.accuracy)
+            if (location.hasSpeed() && location.speed > 0) putFloat("last_speed", location.speed)
+            if (location.hasBearing() && location.bearing >= 0) putFloat("last_heading", location.bearing)
+            if (location.hasAltitude() && location.altitude != 0.0) putFloat("last_altitude", location.altitude.toFloat())
+            putLong("last_timestamp", location.time)
+            apply()
+        }
+
         if (isNetworkAvailable) {
             sendLocationToServer(traccarLocation)
         } else {