Fix alarm not ringing by using AlarmRingService with full-screen intent

AlarmReceiver was calling startActivity() directly, which Android 10+
blocks from background. Now delegates to AlarmRingService which uses a
foreground notification with full-screen intent. Removed duplicate
sound/vibration from AlarmActivity (service owns playback). Removed
all vibration code and VIBRATE permission.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/src/main/java/com/example/helios_alarm_clock/receiver/AlarmReceiver.kt

@@ -3,8 +3,7 @@ package com.example.helios_alarm_clock.receiver
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
-import android.os.PowerManager
-import com.example.helios_alarm_clock.ui.AlarmActivity
+import com.example.helios_alarm_clock.service.AlarmRingService
 
 class AlarmReceiver : BroadcastReceiver() {
 
@@ -12,23 +11,9 @@ class AlarmReceiver : BroadcastReceiver() {
         val alarmId = intent.getStringExtra(EXTRA_ALARM_ID) ?: return
         val label = intent.getStringExtra(EXTRA_ALARM_LABEL) ?: "Alarm"
 
-        // Wake lock to keep CPU alive while we launch the activity
-        val pm = context.getSystemService(Context.POWER_SERVICE) as PowerManager
-        val wl = pm.newWakeLock(
-            PowerManager.PARTIAL_WAKE_LOCK,
-            "helios::alarm_receiver"
-        )
-        wl.acquire(10_000L)
-
-        // Launch AlarmActivity directly — no notification
-        val activityIntent = Intent(context, AlarmActivity::class.java).apply {
-            flags = Intent.FLAG_ACTIVITY_NEW_TASK or
-                    Intent.FLAG_ACTIVITY_CLEAR_TOP or
-                    Intent.FLAG_ACTIVITY_NO_USER_ACTION
-            putExtra(EXTRA_ALARM_ID, alarmId)
-            putExtra(EXTRA_ALARM_LABEL, label)
-        }
-        context.startActivity(activityIntent)
+        // Start foreground service with full-screen intent notification.
+        // Direct startActivity() from a BroadcastReceiver is blocked on Android 10+.
+        AlarmRingService.start(context, alarmId, label)
     }
 
     companion object {

app/src/main/java/com/example/helios_alarm_clock/service/AlarmRingService.kt

@@ -9,8 +9,6 @@ import android.media.AudioAttributes
 import android.media.MediaPlayer
 import android.media.RingtoneManager
 import android.os.IBinder
-import android.os.VibrationEffect
-import android.os.Vibrator
 import android.util.Log
 import androidx.core.app.NotificationCompat
 import com.example.helios_alarm_clock.HeliosApp
@@ -32,7 +30,6 @@ class AlarmRingService : Service() {
     @Inject lateinit var alarmDao: AlarmDao
 
     private var mediaPlayer: MediaPlayer? = null
-    private var vibrator: Vibrator? = null
     private val scope = CoroutineScope(Dispatchers.IO + SupervisorJob())
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
@@ -57,7 +54,6 @@ class AlarmRingService : Service() {
         }
 
         startSound()
-        startVibration()
 
         // Delete the fired alarm from the database
         if (alarmId.isNotEmpty()) {
@@ -86,8 +82,6 @@ class AlarmRingService : Service() {
             } catch (_: Exception) {}
         }
         mediaPlayer = null
-        vibrator?.cancel()
-        vibrator = null
         scope.cancel()
         super.onDestroy()
     }
@@ -116,16 +110,6 @@ class AlarmRingService : Service() {
         }
     }
 
-    private fun startVibration() {
-        try {
-            vibrator = getSystemService(Vibrator::class.java)
-            val pattern = longArrayOf(0, 800, 400, 800, 400)
-            vibrator?.vibrate(VibrationEffect.createWaveform(pattern, 0))
-        } catch (e: Exception) {
-            Log.e(TAG, "Failed to start vibration", e)
-        }
-    }
-
     private fun buildNotification(alarmId: String, label: String): android.app.Notification {
         val fullScreenIntent = Intent(this, AlarmActivity::class.java).apply {
             flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP

app/src/main/java/com/example/helios_alarm_clock/ui/AlarmActivity.kt

@@ -1,11 +1,6 @@
 package com.example.helios_alarm_clock.ui
 
-import android.media.AudioAttributes
-import android.media.MediaPlayer
-import android.media.RingtoneManager
 import android.os.Bundle
-import android.os.VibrationEffect
-import android.os.Vibrator
 import android.util.Log
 import android.view.WindowManager
 import androidx.activity.ComponentActivity
@@ -30,6 +25,7 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.example.helios_alarm_clock.data.AlarmDao
+import com.example.helios_alarm_clock.service.AlarmRingService
 import com.example.helios_alarm_clock.ui.theme.HeliosTheme
 import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.CoroutineScope
@@ -45,8 +41,6 @@ class AlarmActivity : ComponentActivity() {
 
     @Inject lateinit var alarmDao: AlarmDao
 
-    private var mediaPlayer: MediaPlayer? = null
-    private var vibrator: Vibrator? = null
     private val scope = CoroutineScope(Dispatchers.IO + SupervisorJob())
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -60,8 +54,7 @@ class AlarmActivity : ComponentActivity() {
         val alarmId = intent.getStringExtra(EXTRA_ALARM_ID) ?: ""
         val label = intent.getStringExtra(EXTRA_ALARM_LABEL) ?: "Alarm"
 
-        startSound()
-        startVibration()
+        // Sound + vibration are handled by AlarmRingService
 
         // Delete the fired alarm from the database
         if (alarmId.isNotEmpty()) {
@@ -91,47 +84,7 @@ class AlarmActivity : ComponentActivity() {
     }
 
     private fun stopAlarm() {
-        mediaPlayer?.let {
-            try {
-                if (it.isPlaying) it.stop()
-                it.release()
-            } catch (_: Exception) {}
-        }
-        mediaPlayer = null
-        vibrator?.cancel()
-        vibrator = null
-    }
-
-    private fun startSound() {
-        try {
-            val alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM)
-                ?: RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)
-                ?: return
-            mediaPlayer = MediaPlayer().apply {
-                setAudioAttributes(
-                    AudioAttributes.Builder()
-                        .setUsage(AudioAttributes.USAGE_ALARM)
-                        .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
-                        .build()
-                )
-                setDataSource(this@AlarmActivity, alarmUri)
-                isLooping = true
-                prepare()
-                start()
-            }
-        } catch (e: Exception) {
-            Log.e(TAG, "Failed to start alarm sound", e)
-        }
-    }
-
-    private fun startVibration() {
-        try {
-            vibrator = getSystemService(Vibrator::class.java)
-            val pattern = longArrayOf(0, 800, 400, 800, 400)
-            vibrator?.vibrate(VibrationEffect.createWaveform(pattern, 0))
-        } catch (e: Exception) {
-            Log.e(TAG, "Failed to start vibration", e)
-        }
+        AlarmRingService.stop(this)
     }
 
     companion object {