当购物车片段底部导航不可见而backpress使用底部导航时导航抽屉被压碎

Question

HomeActivity

public class HomeActivity extends AppCompatActivity {
    private AppBarConfiguration mAppBarConfiguration;
    public static Toolbar toolbar;
    public static BottomNavigationView bottomNavigationView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);
        toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        DrawerLayout drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);

        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        mAppBarConfiguration = new AppBarConfiguration.Builder(
                R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow,R.id.cartFragment,R.id.wishFragment,R.id.dashboardFragment)
                .setDrawerLayout(drawer)
                .build();

        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
        NavigationUI.setupWithNavController(navigationView, navController);

        bottomNavigationView = findViewById(R.id.bottomNavigationView);
        NavigationUI.setupWithNavController(bottomNavigationView, navController);

    }
    

    @Override
    public boolean onSupportNavigateUp() {
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        return NavigationUI.navigateUp(navController, mAppBarConfiguration)
                || super.onSupportNavigateUp();
    }
}

底部导航栏中的购物车片段

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view =  inflater.inflate(R.layout.fragment_cart, container, false);

        HomeActivity main = (HomeActivity) getActivity();
//You can access all public variable and methods of MainActivity.
//simply call
        main.setSupportActionBar(toolbar);
        main.getSupportActionBar().setDisplayHomeAsUpEnabled(false);
        toolbar.setNavigationIcon(R.drawable.back_arrow);
        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                getActivity().onBackPressed();
                bottomNavigationView.setVisibility(View.VISIBLE);
            }
        });

        bottomNavigationView.setVisibility(View.INVISIBLE);
        return view;
    }

}

• 在Cat片段中第一个底部导航不可见
• 当此时从购物车片段进行反压时，使用可见的底部导航。因为在MainActivity中没有可见的底部导航backpress，所以底部导航没有显示。 ***从卡片片段中返回并单击导航抽屉应用时，美眉