Android 警报管理器未触发广播接收器

我正在设置一个项目，我想使用广播接收器和报警管理器推送通知。由于某种原因，广播接收器没有被触发，即使我把日志检查，我确认它不工作

• 这是我的听筒课

• 这是我的applicat类，我为oreo版本的android添加了频道

• 这是我的清单文件

任何帮助都将不胜感激

 class MyReceiver  : BroadcastReceiver() {

    override fun onReceive(context: Context, intent: Intent?) {
            createNotificatio(context.applicationContext)
        
    }

    private fun createNotificatio(context: Context?) {

        val intent = Intent(context,MyReceiver::class.java)
        val pendingIntent = PendingIntent.getBroadcast(context,0,intent,0)
        val alarmManager = context?.getSystemService(Context.ALARM_SERVICE) as AlarmManager

        when {
            Build.VERSION.SDK_INT >= 23 -> {
                //Alarm Manager to get broadcast receiver 
     alarmManager.setAndAllowWhileIdle(AlarmManager.RTC_WAKEUP,System.currentTimeMillis(),pendingIntent)
            }
            Build.VERSION.SDK_INT in 21..22 -> {
                alarmManager.setExact(AlarmManager.RTC_WAKEUP,System.currentTimeMillis(),pendingIntent)
            }

        }
          //Notification code
        val notification = NotificationCompat.Builder(context!!,"id")
            .setSmallIcon(R.drawable.ic_launcher_background)
            .setContentText("this is a simple text")
            .setContentTitle("title")
            .setAutoCancel(true)
            .setDefaults(NotificationCompat.DEFAULT_SOUND)
            .setPriority(NotificationManagerCompat.IMPORTANCE_HIGH)
            .build()

        NotificationManagerCompat.from(context).notify(1,notification)
    }
}

  class NotificationApplication : Application() {

 // i have the application class into the manifest file 
    override fun onCreate() {
        super.onCreate()
        notification()
    }

    private fun notification() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
        {
            val channel = NotificationChannel(
                "string","id", NotificationManager.IMPORTANCE_HIGH
            )
          var notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
            notificationManager.createNotificationChannel(channel)
        }
    } 
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="kiz.notes.projecttodelete">

   <application
       android:name=".NotificationApplication"
       android:allowBackup="true"
       android:icon="@mipmap/ic_launcher"
       android:label="@string/app_name"
       android:roundIcon="@mipmap/ic_launcher_round"
       android:supportsRtl="true"
       android:theme="@style/AppTheme">
       <activity android:name=".MainActivity">
           <intent-filter>
               <action android:name="android.intent.action.MAIN" />

               <category android:name="android.intent.category.LAUNCHER" />
           </intent-filter>
       </activity>

       <receiver android:name=".MyReceiver"/>
   </application>

</manifest>