Auto-start the floating button on boot

Head units power-cycle with the car's ignition, so requiring a
manual tap into the app every time is the wrong default. A
BOOT_COMPLETED receiver now restarts the service automatically if
overlay + accessibility permissions are already granted.

Extracted the permission checks (previously private to MainActivity)
into PermissionUtils so BootReceiver doesn't duplicate them.

Author: roman-gmk

README.md

@@ -26,6 +26,8 @@ no need to build it yourself. Sideload it (enable "install from unknown sources"
 - **Tap to sleep** – single tap locks/sleeps screen immediately
 - **Haptic feedback** – subtle vibration confirms the tap
 - **Persistent service** – survives app switching; notification with quick Stop action
+- **Auto-start on boot** – if both permissions are already granted, the button comes back
+  automatically after the head unit reboots
 - **Dark space UI** – minimal setup screen
 
 ---

app/src/main/AndroidManifest.xml

@@ -12,6 +12,8 @@
     <uses-permission android:name="android.permission.VIBRATE" />
     <!-- Post notification for foreground service (Android 13+) -->
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <!-- Auto-start the button after the head unit reboots -->
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
 
     <application
         android:allowBackup="false"
@@ -42,6 +44,15 @@
                 android:value="Persistent floating sleep button overlay" />
         </service>
 
+        <!-- Auto-start receiver -->
+        <receiver
+            android:name=".BootReceiver"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+            </intent-filter>
+        </receiver>
+
         <!-- Accessibility service for screen lock -->
         <service
             android:name=".LockScreenService"

app/src/main/java/com/sleepbutton/app/BootReceiver.kt

@@ -0,0 +1,22 @@
+package com.sleepbutton.app
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.os.Build
+
+/** Auto-starts the floating button after boot, if both permissions are already granted. */
+class BootReceiver : BroadcastReceiver() {
+
+    override fun onReceive(context: Context, intent: Intent) {
+        if (intent.action != Intent.ACTION_BOOT_COMPLETED) return
+        if (!PermissionUtils.hasAllPermissions(context)) return
+
+        val serviceIntent = Intent(context, FloatingButtonService::class.java)
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            context.startForegroundService(serviceIntent)
+        } else {
+            context.startService(serviceIntent)
+        }
+    }
+}

app/src/main/java/com/sleepbutton/app/MainActivity.kt

@@ -1,15 +1,12 @@
 package com.sleepbutton.app
 
 import android.Manifest
-import android.accessibilityservice.AccessibilityServiceInfo
-import android.content.Context
 import android.content.Intent
 import android.content.pm.PackageManager
 import android.net.Uri
 import android.os.Build
 import android.os.Bundle
 import android.provider.Settings
-import android.view.accessibility.AccessibilityManager
 import android.widget.Button
 import android.widget.TextView
 import androidx.activity.result.contract.ActivityResultContracts
@@ -75,8 +72,8 @@ class MainActivity : AppCompatActivity() {
     }
 
     private fun refreshUi() {
-        val hasOverlay = Settings.canDrawOverlays(this)
-        val hasAccessibility = isAccessibilityEnabled()
+        val hasOverlay = PermissionUtils.hasOverlayPermission(this)
+        val hasAccessibility = PermissionUtils.hasAccessibilityPermission(this)
         val allGranted = hasOverlay && hasAccessibility
 
         btnOverlay.text = if (hasOverlay) getString(R.string.granted) else getString(R.string.grant)
@@ -105,10 +102,4 @@ class MainActivity : AppCompatActivity() {
             btnToggle.backgroundTintList = getColorStateList(R.color.colorAccent)
         }
     }
-
-    private fun isAccessibilityEnabled(): Boolean {
-        val am = getSystemService(Context.ACCESSIBILITY_SERVICE) as AccessibilityManager
-        val services = am.getEnabledAccessibilityServiceList(AccessibilityServiceInfo.FEEDBACK_ALL_MASK)
-        return services.any { it.resolveInfo.serviceInfo.packageName == packageName }
-    }
 }

app/src/main/java/com/sleepbutton/app/PermissionUtils.kt

@@ -0,0 +1,20 @@
+package com.sleepbutton.app
+
+import android.accessibilityservice.AccessibilityServiceInfo
+import android.content.Context
+import android.provider.Settings
+import android.view.accessibility.AccessibilityManager
+
+object PermissionUtils {
+
+    fun hasOverlayPermission(context: Context): Boolean = Settings.canDrawOverlays(context)
+
+    fun hasAccessibilityPermission(context: Context): Boolean {
+        val am = context.getSystemService(Context.ACCESSIBILITY_SERVICE) as AccessibilityManager
+        val services = am.getEnabledAccessibilityServiceList(AccessibilityServiceInfo.FEEDBACK_ALL_MASK)
+        return services.any { it.resolveInfo.serviceInfo.packageName == context.packageName }
+    }
+
+    fun hasAllPermissions(context: Context): Boolean =
+        hasOverlayPermission(context) && hasAccessibilityPermission(context)
+}