in the fragment which i made it host in the tag fragment in activity when i use navController = Navigation.findNAvController(view) the app crashes by the error: View does not have a navController set.
this is nav_graph:
<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/nav_graph"
app:startDestination="@id/mainFragment">
<fragment
android:id="@+id/mainFragment"
android:name="studio.apptick.mouj.view.fragments.MainFragment"
tools:layout="@layout/fragment_main"
android:label="fragment_main" >
<action
android:id="@+id/action_mainFragment_to_playlistActivityFragment"
app:destination="@id/playlistActivityFragment" />
<action
android:id="@+id/action_mainFragment_to_searchActivity"
app:destination="@id/searchActivity" />
</fragment>
<activity
android:id="@+id/searchActivity"
android:name="studio.apptick.mouj.view.activity.SearchActivity"
android:label="activity_search"
tools:layout="@layout/activity_search" />
</navigation>
this is fragment tag in activity:
android:id="@+id/nav_host_fragment"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="@id/view_player"
android:name="androidx.navigation.fragment.NavHostFragment"
app:defaultNavHost="true"
app:navGraph="@navigation/nav_graph">
</fragment>
I was facing the same issue, until I realized that we have to setup navControol onPostCreate function like this
@Override
public void onPostCreate(@Nullable Bundle savedInstanceState, @Nullable PersistableBundle persistentState) {
super.onPostCreate(savedInstanceState, persistentState);
BottomNavigationView navigationView = findViewById(R.id.nav_view);
AppBarConfiguration appBarConfiguration = new AppBarConfiguration.Builder(
R.id.navigation_home, R.id.navigation_memories, R.id.navigation_account)
.build();
NavController navController = Navigation.findNavController(this, R.id.main_fragment);
NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration);
NavigationUI.setupWithNavController(navigationView, navController);
}