I want to set notification for every day, at user-selected hours and minutes, but the issue is that some times it gets notification on time and some time it delays with 10, 20, 30, 40 seconds delay, and also check that today time is passed or not; if it is, I don’t want to show notification

Function to set Notification

private fun scheduleNotification(context: Context, hour: Int, minute: Int) {
    val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
    val intent = Intent(context, AlarmReceiver::class.java)
    val pendingIntent = PendingIntent.getBroadcast(
        context,
        0,
        intent,
        PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
    )

    val calendar = Calendar.getInstance().apply {
        timeInMillis = System.currentTimeMillis()
        set(Calendar.HOUR_OF_DAY, hour)
        set(Calendar.MINUTE, minute)
        set(Calendar.SECOND, 0)
        set(Calendar.MILLISECOND, 0)
        if (before(Calendar.getInstance())) {
            add(Calendar.DATE, 1)
        }
    }
    alarmManager.cancel(pendingIntent)

    alarmManager.setExact(
        AlarmManager.RTC_WAKEUP,
        calendar.timeInMillis,
        pendingIntent
    )

    alarmManager.setRepeating(
        AlarmManager.RTC_WAKEUP,
        calendar.timeInMillis,
        AlarmManager.INTERVAL_DAY,
        pendingIntent
    )
}

private fun createNotificationChannel(context: Context) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        val name = "Workout Reminder Channel"
        val descriptionText = "Channel for workout reminders"
        val importance = NotificationManager.IMPORTANCE_HIGH
        val channel = NotificationChannel(CHANNEL_ID, name, importance).apply {
            description = descriptionText
        }
        val notificationManager: NotificationManager =
            context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        notificationManager.createNotificationChannel(channel)
    }
}

companion object {
    const val CHANNEL_ID = "workout_reminder_channel"
}

BroadcastReceiver

class AlarmReceiver : BroadcastReceiver() {
    override fun onReceive(context: Context, intent: Intent) {

        val today = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            LocalDate.now()
        } else {
            TODO("VERSION.SDK_INT < O")
        }

        val mainIntent = Intent(context, MainActivity::class.java)
        mainIntent.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK


        val pendingIntent = PendingIntent.getActivity(
            context,
            0,
            mainIntent,
            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
        )

        val notificationManager = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        val notification = NotificationCompat.Builder(context, ProfileViewModel.CHANNEL_ID)
            .setSmallIcon(R.drawable.img_fitness1)
            .setContentTitle("Workout Reminder")
            .setContentText("It's time for your workout! Time : ${formatDate(today)}")
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setContentIntent(pendingIntent)
            .setAutoCancel(true)
            .build()

        notificationManager.notify(NOTIFICATION_ID, notification)
    }

    companion object {
        const val NOTIFICATION_ID = 1
    }
}