由于休息api延迟，视图寻呼机中的第一个片段未显示

Question

我有一个导航抽屉活动，其中一个片段有一个视图寻呼机和标签。所有4个片段都从服务器获取数据。我的问题是视图寻呼机正在加载前2个片段，因此我的第一个片段最初没有显示内容，因为其余的api延迟。因此，在解析和显示第一个片段中的数据之前，正在创建并显示第二个片段。我怎么解决这个问题？

这是我的片段容器

public class FragmentMoviesContainer extends KFragment {
private MainActivity activity;

@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_movies_container, container, false);
    activity = (MainActivity) getActivity();
    assert activity != null;
    activity.setVisibleFragment(this);
    SectionsPagerAdapter mSectionsPagerAdapter = new SectionsPagerAdapter(getChildFragmentManager());
    // Set up the ViewPager with the sections adapter.
    ViewPager mViewPager = rootView.findViewById(R.id.container);
    TabLayout tabLayout = rootView.findViewById(R.id.tabs);

    mViewPager.setAdapter(mSectionsPagerAdapter);
    tabLayout.setupWithViewPager(mViewPager);

    return rootView;
}

@Override
public void onResume() {
    super.onResume();
    ActionBar actionBar = activity.getSupportActionBar();
    if (actionBar != null)
        actionBar.setTitle(R.string.movies);

    activity.getNavigationView().setCheckedItem(R.id.nav_movies);
    activity.setElevation(true);
}

public class SectionsPagerAdapter extends FragmentPagerAdapter {

    SectionsPagerAdapter(FragmentManager fm) {
        super(fm);
    }


    @Override
    public Fragment getItem(int position) {
        switch (position) {
            case 0:
                return replaceFragmentMovies(Constants.STRINGS.UPCOMING);
            case 1:
                return replaceFragmentMovies(Constants.STRINGS.NOW_PLAYING);
            case 2:
                return replaceFragmentMovies(Constants.STRINGS.POPULAR);
            case 3:
                return replaceFragmentMovies(Constants.STRINGS.TOP_RATED);
            default:
                return null;
        }
    }

    @Override
    public CharSequence getPageTitle(int position) {
        switch (position) {
            case 0:
                return getString(R.string.coming_soon);
            case 1:
                return getString(R.string.now_playing);
            case 2:
                return getString(R.string.popular);
            case 3:
                return getString(R.string.top_rated);
            default:
                return "";
        }
    }

    @Override
    public int getCount() {
        return 4;
    }


    private FragmentMovies replaceFragmentMovies(String type) {
        FragmentMovies fragmentMovies = new FragmentMovies();
        fragmentMovies.setType(type);
        return fragmentMovies;
    }
}

@Override
public void serviceResponse(int responseID, List<KObject> objects) {

}

@Override
public void update(ModelService service, boolean reload) {
}
}

这是我的片段在标签中显示的

public class FragmentMovies extends KFragment implements MoviesAdapter.OnLoadMoreListener {
private MainActivity activity;
private ModelService service;

private RecyclerView moviesRv;
private String type;

public void setType(String type) {
    this.type = type;
}

@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_movies, container, false);
    activity = (MainActivity) getActivity();

    if (activity != null) {
        service = activity.getService();
        activity.setVisibleFragment(this);
    }

    moviesRv = rootView.findViewById(R.id.movies_list);
    moviesRv.setLayoutManager(new LinearLayoutManager(getContext()));
    this.update(service, false);

    return rootView;
}


@Override
public void serviceResponse(int responseID, List<KObject> objects) {
    if ((objects != null && !objects.isEmpty()) && (responseID == Constants.UPCOMING || responseID == Constants.NOW_PLAYING || responseID == Constants.POPULAR
            || responseID == Constants.TOP_RATED)) {
        Section section = (Section) objects.get(0);
        MovieListAdapter adapter = new MovieListAdapter(getContext(), section.getMovieList());
        moviesRv.setAdapter(adapter);
    }
}

@Override
public void update(final ModelService service, final boolean reload) {
    boolean hasConnection = Connection.isNetworkAvailable(getContext());
    if (hasConnection && service != null) {
        final int responseId = getResponseID();
        service.getMovies(type, "", false, responseId, reload);
    } else {
//            progressBar.setVisibility(View.GONE);
        DialogHelper.noConnectionDialog(getContext());
    }
}

private int getResponseID() {
    switch (type) {
        case Constants.STRINGS.UPCOMING:
            return Constants.UPCOMING;
        case Constants.STRINGS.NOW_PLAYING:
            return Constants.NOW_PLAYING;
        case Constants.STRINGS.POPULAR:
            return Constants.POPULAR;
        case Constants.STRINGS.TOP_RATED:
            return Constants.TOP_RATED;
        default:
            return 0;
    }
}

@Override
public void onLoadMore(MoviesAdapter adapter) {
}

@Override
public void onResume() {
    super.onResume();
    if (activity.getSupportActionBar() != null)
        activity.getSupportActionBar().setTitle("Movies");

    activity.getNavigationView().setCheckedItem(R.id.nav_movies);
    activity.setElevation(true);
    activity.getAddFab().hide();
}

@Override
public void onDestroy() {
    super.onDestroy();
}
}

方法更新调用其余的api url并获取数据。这是我基于AsyncTask创建的框架。然后将对象列表返回到onServiceResponse方法中解析的片段，我在其中创建适配器并显示数据。问题是第二个片段是在第一个片段的onServiceResponse方法之前创建的。

Answer 1

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