Как грамотно создать и использовать фрагмент recycler view в bottom navigation view?

Как быть?

public class MainActivity extends AppCompatActivity
    {



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

        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            switch (item.getItemId()) {
                case R.id.navigation_home:

                    return true;
                case R.id.navigation_dashboard:
         BlankFragment blankFragment=new BlankFragment();
         getSupportFragmentManager().beginTransaction().replace(R.id.fragment,blankFragment).commit();


                    return true;


                case R.id.navigation_notifications:

                    return true;
            }
            return false;
        }
    };

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


        BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
        navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);



    }



}