我无法在viewPager2的FragmentStateAdapter中调用instantiateItem元素

public class MyAdapter extends FragmentStateAdapter {

    public MyAdapter(FragmentManager fragmentManager, Lifecycle lifecycle) {
        super(fragmentManager, lifecycle);
    }

    @Override
    public int getItemCount() {
        // 返回ViewPager中的项数
        return 3;
    }

    @NonNull
    @Override
    public Fragment createFragment(int position) {
        // 创建并返回指定位置的Fragment实例
        switch (position) {
            case 0:
                return new Fragment1();
            case 1:
                return new Fragment2();
            case 2:
                return new Fragment3();
            default:
                return null;
        }
    }

    @Override
    public long getItemId(int position) {
        // 返回指定位置的项的唯一标识符
        return super.getItemId(position);
    }
}