android - OnDestinationChangeListener 不适用于 Activity 目的地

Question

我正在将 OnDestinationChangedListener 附加到我的 Activity 中的 NavController。

它适用于所有 fragment 目标。但是，当我导航到 Activity 目的地时，我的监听器不会收到更改通知。

override fun onStart() {
    super.onStart()
    navFragment.findNavController().addOnDestinationChangedListener { controller, destination, arguments ->
        Log.e("Navigation", "id: ${destination.id} label: ${destination.label}")
    }
}

我怎样才能同时监听 Activity 目的地的目的地变化？

Answer 1

Documentation说，那:

The Navigation component is designed for apps that have one main activity with multiple fragment destinations. The main activity is associated with a navigation graph and contains a NavHostFragment that is responsible for swapping destinations as needed. In an app with multiple activity destinations, each activity has its own navigation graph.

所以现在我认为你必须自己跟踪你的 Activity 。 :-( 导航图似乎被“封装”在一个 Activity 中。