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NavigationUI.setupWithNavController(bottomNavigationView, navController)

When I run the app, the code is fine, but why it keeps showing compile error like this ?

The bottom navigation I use is in com.google.android.material:material, and the bottom navigation in the param is android.support.design.widget.BottomNavigationView. I know they are the same thing, but why it complains ?

Just restart Android Studio. The lint gets confused sometimes.

Had the same issue. It's super confusing with all the different android packages now. androidx, android-arch, android-support. All of them in some weird version state with -rcX, alpha-X or beta-X...
Using the following code I got the same error. But after telling AndroidStudio to File -> Invalidate Caches and Restart, it suddenly worked.

Also I can highly recommend this tutorial: https://proandroiddev.com/android-jetpack-navigationui-a7c9f17c510e

imports:

implementation "android.arch.navigation:navigation-fragment-ktx:1.0.0-alpha07"
implementation "android.arch.navigation:navigation-ui-ktx:1.0.0-alpha07"

MainActivity

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.navigation.findNavController
import androidx.navigation.ui.NavigationUI
import com.google.android.material.bottomnavigation.BottomNavigationView
import net.onefivefour.android.ebtimetracker.R

class MainActivity : AppCompatActivity() 

 override fun onCreate(savedInstanceState: Bundle?) 
 super.onCreate(savedInstanceState)
 setContentView(R.layout.activity_main)
 NavigationUI.setupWithNavController(findViewById(R.id.navigation), findNavController(R.id.navHostFragment))
 

 override fun onSupportNavigateUp() = findNavController(R.id.navHostFragment).navigateUp()

Activity Layout

<fragment
 android:id="@+id/navHostFragment"
 android:name="androidx.navigation.fragment.NavHostFragment"
 android:layout_width="match_parent"
 android:layout_height="0dp"
 app:defaultNavHost="true"
 app:layout_constraintBottom_toTopOf="@+id/navigation"
 app:layout_constraintEnd_toEndOf="parent"
 app:layout_constraintStart_toStartOf="parent"
 app:layout_constraintTop_toTopOf="parent"
 app:navGraph="@navigation/nav_graph" />

<com.google.android.material.bottomnavigation.BottomNavigationView
 android:id="@+id/navigation"
 android:layout_width="0dp"
 android:layout_height="wrap_content"
 android:background="?android:attr/windowBackground"
 app:layout_constraintBottom_toBottomOf="parent"
 app:layout_constraintLeft_toLeftOf="parent"
 app:layout_constraintRight_toRightOf="parent"
 app:menu="@menu/navigation" />

</androidx.constraintlayout.widget.ConstraintLayout>

navigation.xml

<activity
 android:id="@+id/mainActivity"
 android:name="net.onefivefour.android.ebtimetracker.ui.MainActivity"
 android:label="MainActivity"
 tools:layout="@layout/activity_main" />

<fragment
 android:id="@+id/quickEntryFragment"
 android:name="net.onefivefour.android.ebtimetracker.ui.quickentry.QuickEntryFragment"
 android:label="QuickEntryFragment"
 tools:layout="@layout/fragment_quick_entry" />
<fragment
 android:id="@+id/templatesFragment"
 android:name="net.onefivefour.android.ebtimetracker.ui.templates.TemplatesFragment"
 android:label="TemplatesFragment"
 tools:layout="@layout/fragment_templates" />
<fragment
 android:id="@+id/entriesFragment"
 android:name="net.onefivefour.android.ebtimetracker.ui.entries.EntriesFragment"
 android:label="EntriesFragment"
 tools:layout="@layout/fragment_entries" />

nav_graph.xml

<activity
 android:id="@+id/mainActivity"
 android:name="net.onefivefour.android.ebtimetracker.ui.MainActivity"
 android:label="MainActivity"
 tools:layout="@layout/activity_main" />

<fragment
 android:id="@+id/quickEntryFragment"
 android:name="net.onefivefour.android.ebtimetracker.ui.quickentry.QuickEntryFragment"
 android:label="QuickEntryFragment"
 tools:layout="@layout/fragment_quick_entry" />
<fragment
 android:id="@+id/templatesFragment"
 android:name="net.onefivefour.android.ebtimetracker.ui.templates.TemplatesFragment"
 android:label="TemplatesFragment"
 tools:layout="@layout/fragment_templates" />
<fragment
 android:id="@+id/entriesFragment"
 android:name="net.onefivefour.android.ebtimetracker.ui.entries.EntriesFragment"
 android:label="EntriesFragment"
 tools:layout="@layout/fragment_entries" />

</navigation>