FragmentContainerView作为NavHostFragment

本文介绍了FragmentContainerView作为NavHostFragment的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

好像不能立即使用FragmentContainerView一样工作吗?

Seems like using the FragmentContainerView doesn't work right out of the box?

<androidx.fragment.app.FragmentContainerView
        class="androidx.navigation.fragment.NavHostFragment"
        android:id="@+id/fragment_nav_host"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:defaultNavHost="true"
        app:navGraph="@navigation/nav_app" />

这是我使用fragment-ktx:1.2.0-rc01的代码，而我总是总是收到此错误:

Here's my code using fragment-ktx:1.2.0-rc01 and I'm just always getting this error:

Caused by: java.lang.IllegalStateException: Activity ...MainActivity@797467d does not have a NavController set on 2131296504

只需使用<fragment>作品和AFAIK，就应该将其替换为FragmentContainerView.

Just using <fragment> works and AFAIK, it's just supposed to be replaced by FragmentContainerView.

我错过了什么吗?还是有人可以将FragmentContainerView用作NavHostFragment?

Am I missing something or was anyone able to use FragmentContainerView as a NavHostFragment?

非常感谢！

推荐答案

由于此错误报告: https://issuetracker.google.com/issues/142847973

(当前)唯一的方法是:

The only way (currently) is to to this:

val navHostFragment = supportFragmentManager
    .findFragmentById(R.id.my_nav_host_fragment) as NavHostFragment
val navController = navHostFragment.navController

(Java):

NavHostFragment navHostFragment =
    (NavHostFragment) getSupportFragmentManager()
        .findFragmentById(R.id.my_nav_host_fragment);
NavController navController = navHostFragment.getNavController();

这篇关于FragmentContainerView作为NavHostFragment的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！