FragmentContainerView and app:navGraph - This navigation graph is not referenced to any layout files

user_1791282 0
Viewed 2366

To prevent Lint warning (replace fragment with FragmentContainerView) after upgrading to latest fragments (1.2.2 version) and navigation (2.2.1 version) I replaced fragment with FragmentContainerView 

<androidx.fragment.app.FragmentContainerView
    android:id="@+id/nav_host_fragment"
    android:name="androidx.navigation.fragment.NavHostFragment"
    ....
    app:defaultNavHost="true"
    app:navGraph="@navigation/nav_graph" />

But after that I found error in my @navigation/nav_graph - This navigation graph is not referenced to any layout files

Everything works fine, but that error is very annoying.

android-navigation-graph android-navigation android-architecture-navigation android
4 Answers

It might be that I understand this wrong, but if everything works, this might be a classic case of Android Studio being in need of some cache clearing and restarting. Maybe even manually deleting build folders from your project.

user_68357320

You need to update to the latest versions of the navigation-fragment-ktx in your build.gradle(app)

def nav_version = "2.3.0-alpha03"
implementation "androidx.navigation:navigation-fragment-ktx:$nav_version"
implementation "androidx.navigation:navigation-ui-ktx:$nav_version"
user_122112400

Had the same "false" warning, seems it will be fixed in a future release. Meanwhile, as Android Studio suggests, the warning can be safely ignored using:

<navigation
    ...
    xmlns:tools="http://schemas.android.com/tools"
    tools:ignore="UnusedNavigation" />
user_13540960

I have the same error however, the app compiles fine and works. I suppose we have to wait for fix in the next stable release.

user_112633770
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