如何在片段中的活动中添加导航底部栏

Question

我已经在我的项目中添加了一个底部导航栏，其中包含3个片段（Home_fragment，Wallet_fragment，Account_fragment）。我在Account_fragment中添加了登录按钮。现在，我希望每当我单击登录按钮login_fragment（登录后活动）时，该浏览器底部的导航栏就会打开。

我已在显示问题的视频上附加了一个链接：

https://cloud.degoo.com/share/o41Axz4FYFHBx7

这是从mainActivity开始的代码：

    BottomNavigationView bottomNavigationView = findViewById(R.id.main_nav);
    bottomNavigationView.setOnNavigationItemSelectedListener(navListener);
    getSupportFragmentManager().beginTransaction().replace(R.id.main_frame_layout, new HomeFragment()).commit();

}



BottomNavigationView.OnNavigationItemSelectedListener navListener = new BottomNavigationView.OnNavigationItemSelectedListener() {
    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {

        Fragment selecrFlag = null;
        switch (menuItem.getItemId())
        {
            case R.id.nav_home:
                selecrFlag = new HomeFragment();
                break;

            case R.id.nav_wallet:
                selecrFlag = new WalletFragment();
                break;

            case R.id.nav_Account:
                selecrFlag = new AccountFragment();
                break;


        }
        getSupportFragmentManager().beginTransaction().replace(R.id.main_frame_layout, selecrFlag).commit();
        return true;


    }


};

};

Account_fragment：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View v = inflater.inflate(R.layout.fragment_account, container, false);
    EmailID = v.findViewById(R.id.editTextEmail);
    Passwd = v.findViewById(R.id.editPassword);
    SignUpBt = v.findViewById(R.id.signbutton);
    LoginBt = v.findViewById(R.id.loginbutton);

    LoginBt.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            startActivity(new Intent(AccountFragment.this.getContext(),AfterLogin.class));
        }
    });

登录后片段：

package com.thechamp.earnbyads;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;

public class AfterLogin extends AppCompatActivity {

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


    }
}