在ViewPager2中使用Fragment来代替直接使用View作为页面。这样可以避免ViewPager2重置Activity的视图。

示例代码：

1. 创建一个MyFragment类，继承Fragment，实现需要的页面UI

public class MyFragment extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { //创建需要的页面UI View rootView = inflater.inflate(R.layout.my_fragment_layout, container, false); return rootView; } }

2. 在Activity中使用ViewPager2，并传入MyFragment

public class MainActivity extends AppCompatActivity { ... private List fragmentList = new ArrayList<>(); private ViewPager2 viewPager; ...

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

    viewPager = findViewById(R.id.view_pager);
    fragmentList.add(new MyFragment());
    fragmentList.add(new MyFragment());
    fragmentList.add(new MyFragment());
    viewPager.setAdapter(new MyFragmentAdapter(this, fragmentList));
}

}

3. 创建一个MyFragmentAdapter类，继承FragmentStateAdapter，并传入Fragment列表

public class MyFragmentAdapter extends FragmentStateAdapter { private List fragmentList;

public MyFragmentAdapter(@NonNull FragmentActivity fragmentActivity, List fragmentList) {
    super(fragmentActivity);
    this.fragmentList = fragmentList;
}

@NonNull
@Override
public Fragment createFragment(int position) {
    return fragmentList.get(position);
}

@Override
public int getItemCount() {
    return fragmentList.size();
}

}