android - 内部 fragment ViewPager 需要很长时间才能加载子 fragment

Question

我遇到的问题是加载数据需要很长时间，并且仅在我 ScrollView 寻呼机时才显示。有几次我已经使用了 asynctask 但没有用。更改选项卡后，我调用了相同的 fragment 有人帮助我吗？？

Here, is first time loaded data

After changing tab call same fragment

这是我的 ViewPager 适配器

public class AdapterCategoryViewPager extends FragmentPagerAdapter {
Context context;
private List<Fragment> fragmentList;
private List<Type> typeList;

public AdapterCategoryViewPager(FragmentManager fm, Context context, List<Fragment> fragmentList, List<Type> typeList) {
    super(fm);
    this.context = context;
    this.fragmentList = fragmentList;
    this.typeList = typeList;
}


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

@Override
public CharSequence getPageTitle(int position) {
    return typeList.get(position).getType().toString();
}

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

这是我在异步任务上调用的这个函数类别的 fragment

private void setData(View v)
{
    addWomenCategory();
    ll_list.removeView(v);
    gridView.removeView(v);
    gridView.setMode(PullToRefreshBase.Mode.PULL_FROM_END);
    adapterCategory=new AdapterCategory(v.getContext(),categoryArrayList,height,width);
    gridView.setAdapter(adapterCategory);
    g=(GridView) gridView.getRefreshableView();
    g.setHorizontalSpacing(h7);
    g.setVerticalSpacing(h7);
   // g.setEnabled(false);

    gridView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener<GridView>() {
        @Override
        public void onRefresh(final PullToRefreshBase<GridView> refreshView) {
            gridView.postDelayed(new Runnable() {
                @Override
                public void run() {
                    refreshView.getLoadingLayoutProxy().setRefreshingLabel("Loding Data...");
                    refreshView.getLoadingLayoutProxy().setReleaseLabel("Refresh complete");
                    addWomenCategory();
                    adapterCategory.notifyDataSetChanged();
                    gridView.setRefreshing(false);
                    gridView.onRefreshComplete();

                }
            },2000);
        }
    });
}

这是我的 HomeFragment，它实际上在数组列表中添加了 fragment 类别，我也在异步任务中调用了这个函数

private void setData(View v)
{
    addType();
    pager.setOffscreenPageLimit(3);
    adapterType=new AdapterType(typeArrayList,v.getContext(),height,width);
    fragmentList.add(new FragmentListCategory());
    fragmentList.add(new FragmentMenListCategory());
    fragmentList.add(new FragmentKidListCategory());
    fragmentList.add(new FragmentListCategory());
    fragmentList.add(new FragmentMenListCategory());
    fragmentList.add(new FragmentKidListCategory());

    pager.setAdapter(new AdapterCategoryViewPager(getFragmentManager(),v.getContext(),fragmentList,typeArrayList));

   tabs.setViewPager(pager);
    setUpTabStrip(v);


}

Answer 1

我使用了通用图像加载器库来显示图像，我每次都在适配器中初始化它的对象来解决这个问题我在整个应用程序中只在主 Activity 的 onCreate() 方法中初始化该配置对象一次