Trying to implement with inflationX

[Allan-Nava]

I have this problem when I try to add setContentView(R.layout.activity_main)

 Error inflating class androidx.fragment.app.FragmentContainerView
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err: Caused by: java.lang.IllegalStateException: Fragment class was not set
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.navigation.fragment.FragmentNavigator$Destination.getClassName(FragmentNavigator.java:322)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.navigation.fragment.FragmentNavigator.navigate(FragmentNavigator.java:158)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.navigation.fragment.FragmentNavigator.navigate(FragmentNavigator.java:58)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.navigation.NavGraphNavigator.navigate(NavGraphNavigator.java:71)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.navigation.NavGraphNavigator.navigate(NavGraphNavigator.java:28)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.navigation.NavController.navigate(NavController.java:1059)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.navigation.NavController.onGraphCreated(NavController.java:639)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.navigation.NavController.setGraph(NavController.java:592)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.navigation.NavController.setGraph(NavController.java:557)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.navigation.NavController.setGraph(NavController.java:539)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.navigation.fragment.NavHostFragment.onCreate(NavHostFragment.java:248)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.Fragment.performCreate(Fragment.java:2684)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.FragmentStateManager.create(FragmentStateManager.java:280)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1175)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.FragmentManager.addAddedFragments(FragmentManager.java:2224)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1997)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1953)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1818)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:303)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.FragmentContainerView.<init>(FragmentContainerView.java:166)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.FragmentLayoutInflaterFactory.onCreateView(FragmentLayoutInflaterFactory.java:51)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.FragmentController.onCreateView(FragmentController.java:135)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:356)
2021-04-02 17:32:17.701 31750-31750/myapp.app W/System.err:     at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:335)
2021-04-02 17:32:17.702 31750-31750/myapp.app W/System.err:     at android.view.LayoutInflater.tryCreateView(LayoutInflater.java:1069)
2021-04-02 17:32:17.702 31750-31750/myapp.app W/System.err:     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:997)
2021-04-02 17:32:17.702 31750-31750/myapp.app W/System.err:     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:961)
2021-04-02 17:32:17.702 31750-31750/myapp.app W/System.err:     at android.view.LayoutInflater.rInflate(LayoutInflater.java:1123)
2021-04-02 17:32:17.702 31750-31750/myapp.app W/System.err:     at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1084)
2021-04-02 17:32:17.702 31750-31750/myapp.app W/System.err:     at android.view.LayoutInflater.rInflate(LayoutInflater.java:1126)
2021-04-02 17:32:17.702 31750-31750/myapp.app W/System.err:     at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1084)
2021-04-02 17:32:17.702 31750-31750/myapp.app W/System.err:     at android.view.LayoutInflater.inflate(LayoutInflater.java:682)
2021-04-02 17:32:17.702 31750-31750/myapp.app W/System.err:     at android.view.LayoutInflater.inflate(LayoutInflater.java:534)
2021-04-02 17:32:17.702 31750-31750/myapp.app W/System.err:     at android.view.LayoutInflater.inflate(LayoutInflater.java:481)
2021-04-02 17:32:17.702 31750-31750/myapp.app W/System.err:     at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:696)
2021-04-02 17:32:17.702 31750-31750/myapp.app W/System.err:     at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:170)