导航组件更换/更改后台堆栈

Question

我有底部导航与导航抽屉设置与导航控制器。我目前使用的是最新的v2.4.0-alpha05，它分别为每个底部导航标签管理backstack。问题是，我有一个自定义的导航抽屉(带有一堆文本视图的线性布局)，它属于activity本身，而不是片段。这个抽屉中有一个配置文件选项，当我单击它时，我想导航到account fragment。我可以用navController.navigate(R.id.action_global_accountFragment)做到这一点，但是这个片段现在将被添加到主片段的后台堆栈之上。无论何时我切换回我的主页片段(通过底部导航)，我只想要主页片段的后栈，而不是account片段，也就是说，我想要将它从栈中移除，或者以任何方式切换到backstack to account fragment的，只要我点击profile view。有没有办法我可以做这些事情或者任何其他的解决方案？我还附加了我的mainactivity oncreate和navcontroller的onDestinationChanged方法。任何帮助都是非常感谢的。

 NavHostFragment navHostFragment =
            (NavHostFragment) getSupportFragmentManager()
                    .findFragmentById(R.id.nav_host_fragment_activity_main);
    navController = navHostFragment.getNavController();

    setSupportActionBar(toolbar);


    AppBarConfiguration appBarConfiguration = new AppBarConfiguration.Builder(
            R.id.homeFragment, R.id.listingsFragment, R.id.featuredFragment, R.id.categoriesFragment
            , R.id.accountFragment)
            .setOpenableLayout(drawerLayout)
            .build();


    Objects.requireNonNull(getSupportActionBar()).setHomeButtonEnabled(true);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_nav_menu_icon);



     NavigationUI.setupWithNavController(toolbar,navController,appBarConfiguration);
     NavigationUI.setupWithNavController(navViewBottom,navController);


    navController.addOnDestinationChangedListener(new NavController.OnDestinationChangedListener() {
        @Override
        public void onDestinationChanged(@NonNull NavController controller, @NonNull NavDestination destination, @Nullable Bundle arguments) {
            if (destination.getId() == R.id.homeFragment){
                    controller.popBackStack(R.id.homeFragment,false, true);    //popping these so that if account fragment is in stack, it will get popped as well, but that also pops all other fragments
                Objects.requireNonNull(getSupportActionBar()).show();
               Objects.requireNonNull(getSupportActionBar()).setHomeAsUpIndicator(R.drawable.ic_nav_menu_icon);
            }

            if (destination.getId() == R.id.categoriesFragment){
                
                controller.popBackStack(R.id.categoriesFragment,false);
                Objects.requireNonNull(getSupportActionBar()).show();
                Objects.requireNonNull(getSupportActionBar()).setHomeAsUpIndicator(R.drawable.ic_nav_menu_icon);
            }

            if (destination.getId() == R.id.listingsFragment){
                controller.popBackStack(R.id.listingsFragment,false);
                Objects.requireNonNull(getSupportActionBar()).show();
                Objects.requireNonNull(getSupportActionBar()).setHomeAsUpIndicator(R.drawable.ic_nav_menu_icon);
            }

            if (destination.getId() == R.id.featuredFragment) {
                controller.popBackStack(R.id.featuredFragment,false);
                Objects.requireNonNull(getSupportActionBar()).show();
                Objects.requireNonNull(getSupportActionBar()).setHomeAsUpIndicator(R.drawable.ic_nav_menu_icon);
            }
            if (destination.getId() == R.id.accountFragment){
                controller.popBackStack(R.id.accountFragment,false);
                Objects.requireNonNull(getSupportActionBar()).hide();
            }
            
        }
    });

这是布局的onclick，我要从中导航到帐户片段

    @Override
public void onClick(View view) {
    
    if (view.getId() == R.id.relativeLayout_profile_navDrawer) {
        drawerLayout.closeDrawer(GravityCompat.START);
        navController.navigate(R.id.action_global_account);

    }

}

Answer 1

我只是设置了bottomNavView.setSelectedItemId(R.id.yourwantedfargment)，它为我完成了这项工作！