以编程方式设置 NavGraph

问题描述

在我的活动布局中，我有以下 NavHostFragment:

In my activity layout, I have the following NavHostFragment:

<fragment
            android:id="@+id/my_nav_host_fragment"
            android:layout_height="match_parent"
            android:layout_width="match_parent"
            android:name="androidx.navigation.fragment.NavHostFragment"
            app:defaultNavHost="true"
            app:navGraph="@navigation/my_nav_graph" />

我的问题是如何以编程方式设置 navGraph?如何在 NavHostFragment 实例中转换 my_nav_host_fragment 视图实例?

My question is how can I set the navGraph programmatically? How can I convert the my_nav_host_fragment view instance in a NavHostFragment instance?

推荐答案

我找到了解决方案:

//Setup the navGraph for this activity
val myNavHostFragment: NavHostFragment = my_nav_host_fragment as NavHostFragment
val inflater = myNavHostFragment.navController.navInflater
val graph = inflater.inflate(R.navigation.my_nav_graph)
myNavHostFragment.navController.graph = graph

基于:导航架构组件 - 将参数数据传递给 startDestination

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