如何让工厂方法在activity android中加载片段？

// 工厂类
public class FragmentFactory {
    public static Fragment createFragment(int type) {
        switch (type) {
            case 1:
                return new Fragment1();
            case 2:
                return new Fragment2();
            default:
                return null;
        }
    }
}

// Activity中加载片段
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 使用工厂方法创建片段对象
        Fragment fragment = FragmentFactory.createFragment(1);

        // 将片段添加到Activity的布局中
        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.add(R.id.fragment_container, fragment);
        fragmentTransaction.commit();
    }
}