片段中的视图有时不显示

Question

我的导航抽屉有不同的碎片，下图给出了视觉描述。我遇到的问题是当我访问另一个视图，如个人资料视图并返回仪表板视图，仪表板＆＃39;主页选项卡显示为空，直到我访问其中一个选项卡并返回到它，然后它显示其中的项目。请看第二张图片。我进入监视器的所有内容都是"E/RecyclerView: No adapter attached; skipping layout"错误。

以下是我的仪表板主页选项卡的代码

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{

    View x = inflater.inflate(R.layout.tablayout, null);

    tabLayout = (TabLayout) x.findViewById(R.id.tabs);
    viewPager = (ViewPager) x.findViewById(R.id.viewpager);

    fragmentList = new ArrayList<>();

    prepareDataResource();
    titleList();

    topLevel rta = new topLevel(getFragmentManager(),fragmentList,titleList);
    viewPager.setAdapter(rta);
    tabLayout.setupWithViewPager(viewPager);

    setTabIcons();

    return x;
}

*包含家庭，PTA，事件标签的仪表板片段的代码

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
    View x = inflater.inflate(R.layout.tablayout, null);

    tabLayout = (TabLayout) x.findViewById(R.id.tabs);
    viewPager = (ViewPager) x.findViewById(R.id.viewpager);

    fragmentList = new ArrayList<>();

    prepareDataResource();
    titleList();

    topLevel rta = new topLevel(getFragmentManager(),fragmentList,titleList);
    viewPager.setAdapter(rta);
    tabLayout.setupWithViewPager(viewPager);

    setTabIcons();

    return x;
}