如何在android中交换不同布局的片段？

public class Fragment1 extends Fragment {
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_layout1, container, false);
    }
}

public class Fragment2 extends Fragment {
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_layout2, container, false);
    }
}

    android:id="@+id/fragment_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

public class MainActivity extends AppCompatActivity {
    private Fragment1 fragment1;
    private Fragment2 fragment2;

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

        fragment1 = new Fragment1();
        fragment2 = new Fragment2();

        // 默认显示片段1
        getSupportFragmentManager()
                .beginTransaction()
                .add(R.id.fragment_container, fragment1)
                .commit();
    }

    public void swapFragments(Fragment fragment) {
        getSupportFragmentManager()
                .beginTransaction()
                .replace(R.id.fragment_container, fragment)
                .addToBackStack(null)
                .commit();
    }
}

// 交换到片段1
swapFragments(fragment1);

// 交换到片段2
swapFragments(fragment2);