FragmentDirections 不是由 Safe Args 插件生成的

Question

当我尝试使用 Safe Args 插件从一个片段跳转到另一个片段时，编译器显示“未解析的引用：VideoFragmentDirections”。我已经设置了安全参数的类路径和依赖项，并且 VideoFragmentArgs 已正确生成。kotlin_version = '1.3.50' navigation-safe-args-gradle-plugin:2.1.0 在我的 xml 中

<fragment
        android:id="@+id/nav_home"
        android:name="example.ui.home.HomeFragment"
        android:label="@string/menu_home"
        tools:layout="@layout/fragment_home" >
        <action
            android:id="@+id/action_nav_home_to_videoFragment"
            app:destination="@id/videoFragment"
            app:popUpTo="@+id/nav_home"/>
    </fragment>
<fragment
        android:id="@+id/videoFragment"
        android:name="example.ui.videoui.VideoFragment"
        android:label="VideoFragment" >
        <argument
            android:name="id"
            app:argType="long"
            android:defaultValue="0L" />
    </fragment>

在 HomeFragment.ky 中

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        val videoViewModel = ViewModelProviders
            .of(this)
            .get(HomeViewModel::class.java)
        val adapter = video_list.adapter!! as PlaylistAdapter
        videoViewModel.videos.observe(this, Observer<List<Video>> {
            adapter.submitList(it)
            adapter.onItemClickListener = View.OnClickListener { v ->

                val viewHolder = v.tag as RecyclerView.ViewHolder
                val position = viewHolder.adapterPosition
                val id = it[position].id
                val action = VideoFragmentDirections.actionhHomeToVideo(id)
                view.findNavController().navigate(action)
            }
        })
}

另外，我尝试清理并重建该项目，但仍然不起作用。

Answer 1

// Project level build.gradle 
buildscript {
    repositories {
        google()
    }
    dependencies {
        classpath("androidx.navigation:navigation-safe-args-gradle-plugin:$nav_version") //add here.
    }
}

// Module level build.gradle.
plugins {
    id 'androidx.navigation.safeargs'// add here.
}

祝你快乐每一天

Answer 2

尝试

apply plugin: "androidx.navigation.safeargs.kotlin"

在应用程序 build.gradle 中