正如前面的评论所建议的，您的pager通过最初创建它的两个子片段，然后将它们持久化在内存中来进行优化。我建议在ViewPager回调中添加/删除MenuProvider示例，而不是在子片段onViewCreated中添加/删除x1m0 n1,示例。当ViewPager更改页面时，您可以添加/删除示例。它看起来如下所示：

class MyContainerFragment extends Fragment {

    private ViewPager2 pager;

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        pager.registerOnPageChangeCallback(new UpdateMenuProviderOnPageChangeCallback());
    }

    class UpdateMenuProviderOnPageChangeCallback extends ViewPager2.OnPageChangeCallback {
        private MenuProvider provider1 = new MyMenuProvider1();
        private MenuProvider provider2 = new MyMenuProvider2();

        @Override
        public void onPageSelected(int position) {
            switch(position) {
            case 1:
                requireActivity().removeMenuProvider(provider2);
                requireActivity().addMenuProvider(provider1, getLifecycleOwner());
                break;
            case 2:
                requireActivity().removeMenuProvider(provider1);
                requireActivity().addMenuProvider(provider2, getLifecycleOwner());
                break;
            }
        }
    }

在Activity中定义MenuProvider是最简单的方法：

abstract public class BaseActivity extends AppCompatActivity {

    /** Menu Provider */
    BaseMenuProvider mMenuProvider = null;

    /** It removes & adds {@link BaseMenuProvider} */
    public void setMenuProvider(BaseMenuProvider menuProvider) {
        if (mMenuProvider != null) {removeMenuProvider(mMenuProvider);}
        addMenuProvider(menuProvider, this, Lifecycle.State.RESUMED);
        mMenuProvider = menuProvider;
    }
    ...
}

然后在Fragment内更改MenuProvider：

BaseActivity activity = ((BaseActivity) this.requireActivity());
activity.setMenuProvider(new SettingsMenuProvider(activity));