Change a container view with other layout

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Android

navigation

layout

I am Android Studio beginner and I wish to get some guidance from experienced one. So I've created a project with bottom navigation activity and have 1 default layout which is activity_main.xml. With those ready bottom navigation, I created layouts for each of them by adding a new empty fragment.

I have Home, MainActivity, Notifications, Profile, Settings under my bundle folder (under java). Layout folder has activity_main.xml, fragment_home.xml, fragment_notifications.xml, fragment_profile.xml, fragment_settings.xml.

I want to make fragment_home.xml layout to be first displayed in the container of activity_main.xml

What I understand about the layout is, activity_main.xml now acting like a master container where it's elements (such as button, textinput) will keep on displayed even after I change the view screen by clicking one of the menu from bottom navbar.

This is what I have in activity_main.xml :

<!-- I make the tags short just for sample purpose -->

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout>
	<!-- I want to replace this TextView with fragment_home.xml view -->
    <TextView />
	
	<!-- This is the bottom navigation that is already being included -->
    <com.google.android.material.bottomnavigation.BottomNavigationView />
</androidx.constraintlayout.widget.ConstraintLayout>

This is my MainActivity.java :

public class MainActivity extends AppCompatActivity {
    private TextView mTextMessage;

    private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
            = new BottomNavigationView.OnNavigationItemSelectedListener() {

        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            switch (item.getItemId()) {
                case R.id.navigation_home:
                    // I believe that I have to do something here to get the view?
                    getSupportFragmentManager().beginTransaction().replace(R.id.container, new Home()).commit();
                    return true;
                case R.id.navigation_profile:
                    getSupportFragmentManager().beginTransaction().replace(R.id.container, new Profile()).commit();
                    return true;
                case R.id.navigation_notifications:
                    getSupportFragmentManager().beginTransaction().replace(R.id.container, new Notifications()).commit();
                    return true;
                case R.id.navigation_settings:
                    getSupportFragmentManager().beginTransaction().replace(R.id.container, new Settings()).commit();
                    return true;
            }
            return false;
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        BottomNavigationView navView = findViewById(R.id.nav_view);
        mTextMessage = findViewById(R.id.message);
        navView.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
    }

}

What I have tried:

I tried replacing

<TextView />

with

<include layout="@layout/fragment_home" />

from activity_main.xml but like I said, it will be displayed in every screen when switched.

How should I load the home fragment as default view and replaced with other view based on the navigation selection? Thank you.