Tabla 的使用方法

public class Fragment1 extends Fragment{
private List data = new ArrayList<>();
private TabLayout mytab;
private ViewPager viewPager;

@Nullable@Overridepublic View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {    View view = inflater.inflate(R.layout.fragment1, container, false);    mytab = view.findViewById(R.id.MtTab);    viewPager = view.findViewById(R.id.viewpager);    data.add(new ShuJu("新闻","http://www.93.gov.cn/93app/data.do?channelId=2&startNum=1"));    data.add(new ShuJu("北京","http://www.93.gov.cn/93app/data.do?channelId=2&startNum=2"));    data.add(new ShuJu("南京","http://www.93.gov.cn/93app/data.do?channelId=2&startNum=3"));    data.add(new ShuJu("深圳","http://www.93.gov.cn/93app/data.do?channelId=2&startNum=4"));    data.add(new ShuJu("广州","http://www.93.gov.cn/93app/data.do?channelId=2&startNum=5"));    data.add(new ShuJu("杭州","http://www.93.gov.cn/93app/data.do?channelId=2&startNum=6"));    data.add(new ShuJu("娱乐","http://www.93.gov.cn/93app/data.do?channelId=2&startNum=7"));    data.add(new ShuJu("小事","http://www.93.gov.cn/93app/data.do?channelId=2&startNum=8"));    data.add(new ShuJu("大事","http://www.93.gov.cn/93app/data.do?channelId=2&startNum=9"));   return view;}@Overridepublic void onActivityCreated(@Nullable Bundle savedInstanceState) {    super.onActivityCreated(savedInstanceState);    viewPager.setAdapter(new Myadapter(getActivity().getSupportFragmentManager()));    mytab.setupWithViewPager(viewPager);}

//viewpager 与 TabLayout的适配器
class Myadapter extends FragmentPagerAdapter{

   public Myadapter(FragmentManager fm) {       super(fm);   }   @Override   public CharSequence getPageTitle(int position) {       return data.get(position).getNaem();   }   @Override   public Fragment getItem(int position) {       Zi_Fragment zi_fragment = new Zi_Fragment();       //传递参数       Bundle bundle=new Bundle();//key:string vavle:object       bundle.putString("url",data.get(position).getUrl());       zi_fragment.setArguments(bundle);       return zi_fragment;   }   @Override   public int getCount() {       return data.size();   }

}
}

public class Zi_Fragment extends Fragment{
private String url;
private PullToRefreshListView plistview;
private List