Fix signal strength and adaptive icon

- Add signalStrength API fallback when allCellInfo returns empty
- Create proper adaptive icon with vector foreground
- Add logging to TetherStateReceiver for debugging autostart

app/src/main/java/dev/itsh/tetherapi/provider/StatusProvider.kt

@@ -132,47 +132,65 @@ class StatusProvider(private val context: Context) {
             context, Manifest.permission.ACCESS_FINE_LOCATION
         ) == PackageManager.PERMISSION_GRANTED
 
-        if (!hasLocationPermission) {
-            return Pair(-999, 0)
+        // Try allCellInfo first (requires location permission)
+        if (hasLocationPermission) {
+            try {
+                val cellInfoList: List<CellInfo>? = telephonyManager.allCellInfo
+                if (!cellInfoList.isNullOrEmpty()) {
+                    for (cellInfo in cellInfoList) {
+                        if (!cellInfo.isRegistered) continue
+
+                        val dbm = when (cellInfo) {
+                            is CellInfoLte -> cellInfo.cellSignalStrength.dbm
+                            is CellInfoNr -> if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+                                cellInfo.cellSignalStrength.dbm
+                            } else -999
+                            is CellInfoGsm -> cellInfo.cellSignalStrength.dbm
+                            is CellInfoWcdma -> cellInfo.cellSignalStrength.dbm
+                            is CellInfoCdma -> cellInfo.cellSignalStrength.dbm
+                            else -> continue
+                        }
+
+                        val level = when (cellInfo) {
+                            is CellInfoLte -> cellInfo.cellSignalStrength.level
+                            is CellInfoNr -> if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+                                cellInfo.cellSignalStrength.level
+                            } else 0
+                            is CellInfoGsm -> cellInfo.cellSignalStrength.level
+                            is CellInfoWcdma -> cellInfo.cellSignalStrength.level
+                            is CellInfoCdma -> cellInfo.cellSignalStrength.level
+                            else -> continue
+                        }
+
+                        if (dbm != -999 && dbm != Int.MAX_VALUE) {
+                            return Pair(dbm, level)
+                        }
+                    }
+                }
+            } catch (e: SecurityException) {
+                // Fall through to signalStrength fallback
+            } catch (e: Exception) {
+                // Fall through to signalStrength fallback
+            }
         }
 
+        // Fallback: use signalStrength API (doesn't require location for basic level)
         try {
-            val cellInfoList: List<CellInfo>? = telephonyManager.allCellInfo
-            if (cellInfoList.isNullOrEmpty()) {
-                return Pair(-999, 0)
-            }
-
-            for (cellInfo in cellInfoList) {
-                if (!cellInfo.isRegistered) continue
-
-                val dbm = when (cellInfo) {
-                    is CellInfoLte -> cellInfo.cellSignalStrength.dbm
-                    is CellInfoNr -> if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
-                        cellInfo.cellSignalStrength.dbm
-                    } else -999
-                    is CellInfoGsm -> cellInfo.cellSignalStrength.dbm
-                    is CellInfoWcdma -> cellInfo.cellSignalStrength.dbm
-                    is CellInfoCdma -> cellInfo.cellSignalStrength.dbm
-                    else -> continue
+            val signalStrength = telephonyManager.signalStrength
+            if (signalStrength != null) {
+                val level = signalStrength.level
+                // Try to get dBm from the signal strength
+                val dbm = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+                    signalStrength.cellSignalStrengths.firstOrNull()?.dbm ?: -999
+                } else {
+                    -999
                 }
-
-                val level = when (cellInfo) {
-                    is CellInfoLte -> cellInfo.cellSignalStrength.level
-                    is CellInfoNr -> if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
-                        cellInfo.cellSignalStrength.level
-                    } else 0
-                    is CellInfoGsm -> cellInfo.cellSignalStrength.level
-                    is CellInfoWcdma -> cellInfo.cellSignalStrength.level
-                    is CellInfoCdma -> cellInfo.cellSignalStrength.level
-                    else -> continue
+                if (level > 0 || dbm != -999) {
+                    return Pair(dbm, level)
                 }
-
-                return Pair(dbm, level)
             }
-        } catch (e: SecurityException) {
-            return Pair(-999, 0)
         } catch (e: Exception) {
-            return Pair(-999, 0)
+            // Ignore
         }
 
         return Pair(-999, 0)

app/src/main/java/dev/itsh/tetherapi/receiver/TetherStateReceiver.kt

@@ -5,12 +5,14 @@ import android.content.Context
 import android.content.Intent
 import android.net.ConnectivityManager
 import android.os.Build
+import android.util.Log
 import androidx.preference.PreferenceManager
 import dev.itsh.tetherapi.service.TetherApiService
 
 class TetherStateReceiver : BroadcastReceiver() {
 
     override fun onReceive(context: Context, intent: Intent) {
+        Log.d(TAG, "Received broadcast: ${intent.action}")
         if (intent.action != ACTION_TETHER_STATE_CHANGED) return
 
         val prefs = PreferenceManager.getDefaultSharedPreferences(context)
@@ -21,9 +23,13 @@ class TetherStateReceiver : BroadcastReceiver() {
         val isTethering = isTetherActive(context, intent)
         val port = prefs.getInt(PREF_PORT, TetherApiService.DEFAULT_PORT)
 
+        Log.d(TAG, "Tethering active: $isTethering, service running: ${TetherApiService.isRunning}")
+
         if (isTethering && !TetherApiService.isRunning) {
+            Log.d(TAG, "Starting service on port $port")
             TetherApiService.start(context, port)
         } else if (!isTethering && TetherApiService.isRunning) {
+            Log.d(TAG, "Stopping service")
             TetherApiService.stop(context)
         }
     }
@@ -54,6 +60,7 @@ class TetherStateReceiver : BroadcastReceiver() {
     }
 
     companion object {
+        private const val TAG = "TetherStateReceiver"
         const val ACTION_TETHER_STATE_CHANGED = "android.net.conn.TETHER_STATE_CHANGED"
         const val PREF_AUTO_START = "auto_start_on_tether"
         const val PREF_PORT = "api_port"

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

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+
+    <!-- Phone body -->
+    <path
+        android:fillColor="#1e293b"
+        android:pathData="M15.2,37h18.5c1.8,0 3.4,1.5 3.4,3.4v33.7c0,1.8 -1.5,3.4 -3.4,3.4H15.2c-1.8,0 -3.4,-1.5 -3.4,-3.4V40.4c0,-1.8 1.5,-3.4 3.4,-3.4z"/>
+    <!-- Phone screen -->
+    <path
+        android:fillColor="#ffffff"
+        android:pathData="M17.3,40h14.3c0.7,0 1.3,0.6 1.3,1.3v24.4c0,0.7 -0.6,1.3 -1.3,1.3H17.3c-0.7,0 -1.3,-0.6 -1.3,-1.3V41.3c0,-0.7 0.6,-1.3 1.3,-1.3z"/>
+    <!-- Phone button -->
+    <path
+        android:fillColor="#ffffff"
+        android:pathData="M21.1,66.5h6.7c0.3,0 0.6,0.3 0.6,0.6v1.3c0,0.3 -0.3,0.6 -0.6,0.6h-6.7c-0.3,0 -0.6,-0.3 -0.6,-0.6v-1.3c0,-0.3 0.3,-0.6 0.6,-0.6z"/>
+
+    <!-- Signal bars -->
+    <path
+        android:fillColor="#0ea5e9"
+        android:pathData="M40.5,56.8h4.2c0.4,0 0.8,0.4 0.8,0.8v9.3c0,0.4 -0.4,0.8 -0.8,0.8h-4.2c-0.4,0 -0.8,-0.4 -0.8,-0.8v-9.3c0,-0.4 0.4,-0.8 0.8,-0.8z"/>
+    <path
+        android:fillColor="#0ea5e9"
+        android:pathData="M47.2,51.8h4.2c0.4,0 0.8,0.4 0.8,0.8v14.3c0,0.4 -0.4,0.8 -0.8,0.8h-4.2c-0.4,0 -0.8,-0.4 -0.8,-0.8V52.6c0,-0.4 0.4,-0.8 0.8,-0.8z"/>
+    <path
+        android:fillColor="#0ea5e9"
+        android:pathData="M54,46.8h4.2c0.4,0 0.8,0.4 0.8,0.8v19.3c0,0.4 -0.4,0.8 -0.8,0.8H54c-0.4,0 -0.8,-0.4 -0.8,-0.8V47.6c0,-0.4 0.4,-0.8 0.8,-0.8z"/>
+
+    <!-- Laptop screen -->
+    <path
+        android:fillColor="#1e293b"
+        android:pathData="M65.7,41.3h27c1.3,0 2.5,1.2 2.5,2.5v18.5c0,1.3 -1.2,2.5 -2.5,2.5h-27c-1.3,0 -2.5,-1.2 -2.5,-2.5V43.8c0,-1.3 1.2,-2.5 2.5,-2.5z"/>
+    <!-- Laptop display -->
+    <path
+        android:fillColor="#ffffff"
+        android:pathData="M67.8,43.4h22.8c0.4,0 0.8,0.4 0.8,0.8v13.5c0,0.4 -0.4,0.8 -0.8,0.8H67.8c-0.4,0 -0.8,-0.4 -0.8,-0.8V44.2c0,-0.4 0.4,-0.8 0.8,-0.8z"/>
+    <!-- Laptop base -->
+    <path
+        android:fillColor="#1e293b"
+        android:pathData="M63.2,60.8h32c0.4,0 0.8,0.4 0.8,0.8v2.9c0,0.4 -0.4,0.8 -0.8,0.8h-32c-0.4,0 -0.8,-0.4 -0.8,-0.8v-2.9c0,-0.4 0.4,-0.8 0.8,-0.8z"/>
+</vector>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/ic_launcher_background"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/values/colors.xml

@@ -13,4 +13,5 @@
     <color name="on_error">#FFFFFF</color>
     <color name="status_running">#4CAF50</color>
     <color name="status_stopped">#9E9E9E</color>
+    <color name="ic_launcher_background">#FFFFFF</color>
 </resources>