在华为和三星手机上关闭应用程序时，警报经理无法正常工作

Question

I created a Kotlin app who should give an alarm when a defined number of thinks is reached. In the emulator it is working fine and also when the app is open. But when the app is closed, the alarm is not triggered on my Huawei and Samsung phone. I tried the following:

• 更改手机上的设置（应用通知，电池管理）
• 在不同的电话（华为和三星）上尝试一下，
• 中添加了“警报”单词，
• 我在构建和尝试的发布版本

不幸的是，没有任何帮助。

private fun setAlarm(timeInMillis: Long) {
    val alarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager
    val intent = Intent(this, MyAlarmReceiver::class.java)
    val pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0)
    alarmManager.set(
        AlarmManager.RTC,
        timeInMillis,
        pendingIntent
    )
    //Alarm deaktiviert
    if ((actual_alarm_on_off =="OFF" && actual_alarm_on_off != "ON1") || (alarmReleased == true && actual_alarm_on_off != "ON1")){
        alarmManager.cancel(pendingIntent)
    }
}

class MyAlarmReceiver: BroadcastReceiver(){

companion object {
    const val NOTIFICATION_ID = 100
    const val NOTIFICATION_CHANNEL_ID = "1000"
}

override fun onReceive(context: Context, intent: Intent) {
    createNotificationChannel(context)
    notifyNotification(context)
}

private fun createNotificationChannel(context: Context) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        val notificationChannel = NotificationChannel(
            NOTIFICATION_CHANNEL_ID,
            "@string/app",
            NotificationManager.IMPORTANCE_HIGH
        )
        NotificationManagerCompat.from(context).createNotificationChannel(notificationChannel)
    }
}

private fun notifyNotification(context: Context) {
    with(NotificationManagerCompat.from(context)) {
        val build = NotificationCompat.Builder(context, NOTIFICATION_CHANNEL_ID)
            .setContentTitle("Pillen-Zähler Alarm")
            .setContentText("Medikament bald aufgebraucht!")
            .setSmallIcon(R.drawable.ic_baseline_warning_24)
            .setPriority(NotificationCompat.PRIORITY_HIGH)
        notify(NOTIFICATION_ID, build.build())
    }
}

}

<receiver android:name="com.example.medbesteller_alarm.MyAlarmReceiver"
        android:exported="false"/>