android - 从 compose 导航到 Fragment

Question

我想从 compose 导航到 Fragment。我在 compose 中定义了一个 NavHost:

NavHost(
   navController = navController,
   startDestination = DrawerScreen.Screen2.route
) {
   composable(DrawerScreen.Screen1.route) {
      navController.navigate(R.id.screen_one)
   }
   composable(DrawerScreen.Screen2.route) {
      Screen2(
         openDrawer = {
            openDrawer()
         }
      )
   }
}

简单 fragment :

@AndroidEntryPoint
class ScreenOneFragment: Fragment() {

   @Nullable
   override fun onCreateView(
      inflater: LayoutInflater,
      @Nullable container: ViewGroup?,
      @Nullable savedInstanceState: Bundle?
   ): View {
      val view: View = inflater.inflate(R.layout.screen_one, container, false)
      return view
   }
}

但是，当我尝试导航时，出现以下异常:

java.lang.IllegalArgumentException: Navigation action/destination com.test/screenOne cannot be found from the current destination Destination(0x2b264dff) route=ScreenOne

这是我的导航 xml:

<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/mobile_navigation"
    app:startDestination="@id/screenOne">
    <fragment
        android:id="@+id/screenOne"
        android:name="com.test.ScreenOne"
        android:label="ScreenOne" />
</navigation>

是否可以从 compose 导航到 Fragment？

Answer 1

根据 Interopability docs :

If you want to use the Navigation component with Compose, you have two options:

• Define a navigation graph with the Navigation component for fragments.

• Define a navigation graph with a NavHost in Compose using Compose destinations. This is possible only if all of the screens in the navigation graph are composables.

所以不，如果您使用的是 NavHost，则无法导航到 fragment 目标(反之亦然:如果您使用的是 NavHostFragment，则可以'不要导航到一个可组合目的地:两个世界都不知道另一个世界)。

它实际上听起来像是你想要 add a Fragment to Compose .这将允许您的所有目的地成为您的单个 NavHost 中的可组合目的地，但让一个屏幕完全由 fragment 实现(您的 ScreenOne ).

composable(DrawerScreen.Screen1.route) {
  // Assumes you have a layout with a FragmentContainerView
  // that uses android:name="com.test.ScreenOneFragment"
  AndroidViewBinding(ScreenOneLayoutBinding::inflate) {
    val myFragment = fragmentContainerView.getFragment<ScreenOneFragment>()
    // ...
}