使用androidx.navigation时按活动重置工具栏标题

<fragment
    android:id="@+id/homeFragment"
    android:name="com.example.app.HomeFragment"
    android:label="Home"
    tools:layout="@layout/fragment_home" />

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Toolbar toolbar = findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
    AppBarConfiguration appBarConfiguration = new AppBarConfiguration.Builder(navController.getGraph()).build();
    NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration);
    
    navController.addOnDestinationChangedListener((controller, destination, arguments) -> {
        setTitle(destination.getLabel());
    });
}