我需要显示并维护一个对话框，该对话框在一段时间（例如30 s）后在Android应用程序上消失。但是我遇到了一些困难：

1. 如何记录主机（始终处于活动状态）或正在整理中的显示时间？

2. 如果需要，在其他主机恢复时如何重新显示对话框？

我通过下面的代码尝试了一下，但是没用

// dialog that I want to show.
class BusinessBroadcastDialog(activity: activity,private val tag: String) : AlertDialog(activity)

object GlobalShowableManager {

    fun show(duration: Int) {
        // activityRecorder.get() will return the activity which is on the top of task.
        val activity = activityRecorder.get()
        if (activity?.isactivityExist() == true) {
            val tag = "${activity.javaClass.simpleName}#BusinessBroadcastDialog#$duration"
            val dialog = BusinessBroadcastDialog(activity,tag).apply {
                owneractivity = activity
            }
            dialog.show()
        } else {
            Log.i(TAG,"no exist activity to show global dialog,break.")
        }
    }

    fun resumeToShow() {
        // will be called when other host resumed.
        // get last BusinessBroadcastDialog showing time mark it as t. 
        // if t >= duration then do nothing,// else let t = t - duration and show dialog. dialog will disappear after t seconds.
    }
}

是否有（更好的）方法来显示android中的全局对话框？感谢您的收看和回答：）