如何将Activity从片段"Kotlin“中移动

<FrameLayout
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

public class JavaFragment extends Fragment {
    private FrameLayout container;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_java, container, false);
        this.container = view.findViewById(R.id.container);
        return view;
    }

    @Override
    public void onResume() {
        super.onResume();
        // 将Activity与目标片段关联起来
        getActivity().getSupportFragmentManager().beginTransaction()
                .replace(container.getId(), new KotlinFragment())
                .commit();
    }
}

public class KotlinFragment extends Fragment {
    @Override
    public void onResume() {
        super.onResume();
        // 将Activity与源片段解除关联
        getActivity().getSupportFragmentManager().beginTransaction()
                .remove(this)
                .commit();
    }
}