将前台计时器通知发布到同一频道

Question

在制作计时器应用的过程中，出现了一种涉及前台服务和通知的奇怪情况。该应用程序在服务中包含多个计时器。启动计时器后，服务会启动自定义CountdownTimer并在通知中更新剩余的计时器时间。没问题。问题出现在第二个计时器启动时。在这种情况下，“前台服务”通知“弹出”和“正在关闭”，因此无法看到该通知。

问题是如何将2个单独的计时器时间onTick（）发布到同一通道上的同一顺序的相同通道上？

通知应显示如下：

App
1:50 remaining
0:30 remaining

这是服务中用于上下文的一些代码。计时器对象的onTick（）代码（请记住，我们有多个Timer对象）：

    private fun createTimer(timerTime: Long, timerID: Long):EnkelTimer{
    val timerID_Int = timerID.toInt()
    return object : EnkelTimer(
            countdownInterval = 1000,
            millisInFuture = 1000 * timerTime,
            id = timerID){
        override fun onFinish() {
            //TODO Notification that we are done
            activeTimers.remove(this)
            if (activeTimers.size<2){
                stopForegroundService()
            }
        }
        override fun onTick(millisUntilFinished: Long) {
            startForeground(timerID_Int, notificationFromTimeRemaining(millisUntilFinished))
        }
    }
}

通知代码：

    private fun notificationFromTimeRemaining(millisUntilFinished: Long): Notification{
    val notifChannel = if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.O){
        createNotificationChannel()
    } else {""}

    val notifBuilder = NotificationCompat.Builder(this, notifChannel)

    with(notifBuilder){
        setSmallIcon(R.drawable.play)
        setStyle(NotificationCompat.BigTextStyle())
        setContentTitle(numberOfTimersRunningText())
        setContentText("${DateUtils.formatElapsedTime(millisUntilFinished/1000)}")
        setShowWhen(false)
        setAutoCancel(false)
        setChannelId(CHANNEL)

    }
    return notifBuilder.build()
}

通知渠道代码：

    @RequiresApi(Build.VERSION_CODES.O)
private fun createNotificationChannel():String{
        val name = "Timers"
        val description = "A channel for Enkel timers"
        val importance = NotificationManager.IMPORTANCE_LOW
        val notificationChannel = NotificationChannel(CHANNEL, name,  importance)
        notificationChannel.description = description

        val notificationManager: NotificationManager =
                getSystemService(NotificationManager::class.java)
        notificationManager.createNotificationChannel(notificationChannel)
        return CHANNEL
}