我想管理片段之间的导航

如何解决我想管理片段之间的导航

我的项目结构看起来与以下类似

我目前面临的问题是，在恢复应用程序时，F7被保留。 并且在打开任何项目的子片段时都无法在bottomnavigationitems之间正确导航 这是我的主要活动课程代码。

public class HomeActivity extends AppCompatActivity {
    SpaceNavigationView spaceNavigationView;
    int featureClickId=-1;
    Handler handler;

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

        spaceNavigationView=findViewById(R.id.navigation);
        spaceNavigationView.initWithSaveInstanceState(savedInstanceState);
        spaceNavigationView.addSpaceItem(new SpaceItem("",R.drawable.ic_baseline_info_24));
        spaceNavigationView.addSpaceItem(new SpaceItem("",R.drawable.ic_baseline_chat_24));
        spaceNavigationView.addSpaceItem(new SpaceItem("",R.drawable.ic_baseline_ballot_24));
       spaceNavigationView.addSpaceItem(new SpaceItem("",R.drawable.ic_baseline_account_circle_24));
        spaceNavigationView.setCentreButtonSelectable(true);
        spaceNavigationView.setCentreButtonSelected();
        spaceNavigationView.setCentreButtonIcon(R.drawable.ic_centericonlarge);

        FeatureFragment fragment = (FeatureFragment) getSupportFragmentManager().findFragmentById(R.id.fragment_container);
       if(fragment==null)
       {
           Fragment fragmentt=new FeatureFragment();
           loadFragment(fragmentt,"Feature");
       }




        spaceNavigationView.setSpaceOnClickListener(new SpaceOnClickListener() {
            @Override
            public void onCentreButtonClick() {
                //showHome();
                Fragment fragmentA = getSupportFragmentManager().findFragmentByTag("Feature");
                if(fragmentA!=null)
                {
                   showHome();
                }else
                {
                    Fragment fragment=new FeatureFragment();
                    loadFragment(fragment,"Feature");
                }

                spaceNavigationView.setCentreButtonSelectable(true);
            }



            @Override
            public void onItemClick(int itemIndex,String itemName) {
                switch (itemIndex)
                {
                    case 0:
                        break;
                    case 1:
                        break;
                    case 2:
                        break;
                    case 3:
                        showHome();
                        Fragment fragment=new ProfileFragment();
                        loadFragment(fragment,"Profile");
                        break;
                }
            }

            @Override
            public void onItemReselected(int itemIndex,"Profile");
                        break;
                }
            }
        });
    }

    public void showHome() {
        handler = new Handler();
        handler.post(new Runnable() {
            @Override
            public void run() {
                final FragmentManager fm = getSupportFragmentManager();
                while(fm.getBackStackEntryCount()>1)
                    fm.popBackStackImmediate();
            }
        });
    }

    private boolean loadFragment(Fragment fragment,String tag)
    {
        if (fragment!=null)
        {
            getSupportFragmentManager()
                    .beginTransaction()
                    .replace(R.id.fragment_container,fragment,tag)
                    .addToBackStack(null)
                    .commit();
            return true;
        }
        return false;
    }



    @Override
    protected void onStart() {
        super.onStart();
        EventBus.getDefault().register(this);
    }

    @Override
    protected void onStop() {
        EventBus.getDefault().unregister(this);
        super.onStop();
    }



    @Subscribe(sticky = true,threadMode = ThreadMode.MAIN)
    public void onFeatureSelected(FeatureClick event)
    {
        if(event.isSuccess())
        {
           Fragment fragment=new DomainFragment();
           loadFragment(fragment,"Domain");
        }
    }

    @Subscribe(sticky = true,threadMode = ThreadMode.MAIN)
    public void onDomainItemClick(DomainItemClick event)
    {
        if(event.isSuccess())
        {
           Fragment fragment=new DetailDomainFragment();
           loadFragment(fragment,"DetailDomain");
        }
    }

    @Subscribe(sticky = true,threadMode = ThreadMode.MAIN)
    public void onFeatureItemBack(FeatureItemBack event)
    {
        featureClickId=-1;
        if(getSupportFragmentManager().getBackStackEntryCount()>0)
            getSupportFragmentManager().popBackStack();
    }

    @Override
    public void onBackPressed() {

        int count = getSupportFragmentManager().getBackStackEntryCount();

        if (count<= 1) {
            super.onBackPressed();
            finish();
            //additional code
        } else {
            getSupportFragmentManager().popBackStackImmediate();
        }

    }
}

我了解到saveInstanceState正在保存错误的片段，因此在恢复活动时会保留不想要的片段。