上拉刷新下拉加载

public class Fragment01 extends Fragment {

    private XListView xlv;
    private int page=1;
    private int type=1;
    private  String url;
    private String dataType;
    private  List<User.DataBean> list=new ArrayList<>();

    private Handler handler=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if(type==1){
                xlv.stopRefresh();
                Date date=new Date(System.currentTimeMillis());
                SimpleDateFormat format=new SimpleDateFormat("HH:mm:ss");
                String time = format.format(date);
                xlv.setRefreshTime(time);
            }else{
                xlv.stopLoadMore();
            }
        }
    };
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment, container, false);

    xlv = (XListView) view.findViewById(R.id.xlv);



    Bundle bundle = getArguments();
    dataType= bundle.getString("value");
    url ="http://api.expoon.com/AppNews/getNewsList/type/"+dataType+"/p/"+page;



    xlv.setPullRefreshEnable(true);
    xlv.setPullLoadEnable(true);
    xlv.setXListViewListener(new XListView.IXListViewListener() {
        @Override
        public void onRefresh() {
            type=1;
            page=1;

            new MyTesk().execute(url);

        }

        @Override
        public void onLoadMore() {
            type=2;
            page++;

            new MyTesk().execute(url);

        }
    });

    new MyTesk().execute(url);
    return view;
}
class MyTesk extends AsyncTask<String, Void, String> {

    @Override
    protected String doInBackground(String... params) {
        try {
            URL url = new URL(params[0]);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.setReadTimeout(30000);
            connection.setReadTimeout(30000);
            int code = connection.getResponseCode();
            if (code == 200) {
                InputStream inputStream = connection.getInputStream();
                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                int len = 0;
                byte[] buffer = new byte[1024];
                while ((len = inputStream.read(buffer)) != -1) {
                    outputStream.write(buffer, 0, len);
                }
                outputStream.close();
                inputStream.close();
                String s = outputStream.toString();
                return s;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
   @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            Gson gson = new Gson();
            User user = gson.fromJson(s,User.class);
           // List<User.DataBean> list = user.getData();
           // list.addAll(user.getData());
            if(type==1){
                list.clear();
                list.addAll(user.getData());
            }else{
                list.addAll(user.getData());

            }

            MyAdapter myAdapter = new MyAdapter(list, getActivity());
            xlv.setAdapter(myAdapter);
            handler.sendEmptyMessageDelayed(0,1000);


        }
    }

}