Android TabLayout 切换片段后不再显示内容

Android TabLayout does not display contents anymore as soon as fragment is switched

我在我的项目中使用了一个导航抽屉,里面有 5 个片段。在一个片段中,我在设计支持库中引入了 TabLayout,其中包括 2 个片段。一切正常,除了当我离开具有 TabLayout 的片段并切换回它时,所有内容都消失了。

在 TabLayout 的每个片段中,我都有一个带有 ListView 的 SwipeRefreshLayout,它们在切换时都不显示任何内容。

我还注意到 TabLayout 开始表现得很奇怪。奇怪的是,我的意思是白色指示器开始跳动,您可以将其保持在两个选项卡的中间...

我是不是漏掉了一些 TabLayout 行为如此奇怪的东西?

这里的代码: 包含 TabLayout 的片段:

public class MainFragment extends Fragment {
    private static String locale;
    private static ViewPager viewPager;
    private static TabLayout tabLayout;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        Utils.changeLanguage(getActivity());

        final Context contextThemeWrapper = new ContextThemeWrapper(getActivity(), R.style.MyStyle);

        LayoutInflater localInflater = inflater.cloneInContext(contextThemeWrapper);

        View view = localInflater.inflate(R.layout.fragment1, container, false);

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

        return view;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        setupViewPager(viewPager);
        tabLayout.setupWithViewPager(viewPager);
    }

    private void setupViewPager(ViewPager viewPager) {
        LinesTabsAdapter adapter = new LinesTabsAdapter(getActivity().getSupportFragmentManager());
        adapter.addFragment(new Fragment1(), "Fragment 1");
        adapter.addFragment(new Fragment2(), "Fragment2");
        viewPager.setAdapter(adapter);
    }


    public static class Fragment extends Fragment {
        private static List<RowItems1> rowItems;
        private static ListView listview;
        private static Adapter1 adapter;

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

            View view = inflater.inflate(R.layout.activity1, container, false);

            listview = (ListView) view.findViewById(R.id.listview1);

            return view;
        }

        @Override
        public void onActivityCreated(Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);

            updateInfo(true);
        }

        public static void updateInfo() {
            rowItems = new ArrayList<>();
            adapter = new Adapter1(context, rowItems);
           listview.setAdapter(adapter);
        }
    }

    public static class Fragment2 extends Fragment {
        private static List<RowItems2> rowItems;
        private static ListView listview;
        private static Adapter1 adapter;

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

            View view = inflater.inflate(R.layout.activity_lines_all, container, false);

            listview = (ListView) view.findViewById(R.id.activity2);

            return view;
        }

        @Override
        public void onActivityCreated(Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);

            updateInfo(true);
        }

        public static void updateInfo() {
            rowItems = new ArrayList<>();
            adapter = new Adapter2(context, rowItems);
            listview.setAdapter(adapter);
        }
    }
}

我将 MainFragment 用作单例,并在用户在导航抽屉中选择它时立即用它替换内容。当我切换到它时,一切正常,ListView 包含它的数据,SwipeRefreshLayout 工作正常。当我使用导航抽屉切换到另一个片段并切换回该片段时,它什么也不显示,如上所述。

编辑:我是唯一遇到此问题的人吗?如果有人遇到问题,他们是如何解决的?

当我使用 viewPager 并重新打开它时,在我使用 getSupportFragmentManager.

切换之前,我的片段是空的

尝试使用:getChildFragmentManager.