xlistview获取网络数据上拉加载下拉刷新

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.bwie.xlistview.XListView
        android:id="@+id/xlist_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

public class XListsFragment extends Fragment {
    private static final String URL = "https://api.yunxuekeji.cn/yunxue_app_api/content/getIndexBanner/";
    private int count = 1;
    public boolean isLoadMore = false;
    private Handler handler = new Handler();

    private XListView xlist_view;
    private List<Banner.bodyBean.resultBean> list;
    private BannerAdapter adapter;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_xlist, container, false);
        xlist_view = view.findViewById(R.id.xlist_view);
        return view;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        list = new ArrayList<>();
        adapter = new BannerAdapter(list,getActivity());
        xlist_view.setAdapter(adapter);
        getData();
        xlist_view.setPullRefreshEnable(true);
        xlist_view.setPullLoadEnable(true);

        xlist_view.setXListViewListener(new XListView.IXListViewListener() {
            @Override
            public void onRefresh() {
                count = 1;
                isLoadMore = false;
                getData();
                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        xlist_view.stopRefresh();
                    }
                },2000);

//设置时间

 

long l = System.currentTimeMillis();
Date date = new Date(l);
SimpleDateFormat format = new SimpleDateFormat("HH:mm");
xlvNews.setRefreshTime(format.format(date));

            }

            @Override
            public void onLoadMore() {
                count ++;
                isLoadMore = true;
                getData();
                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        xlist_view.stopLoadMore();
                    }
                },2000);
            }
        });

    }

    private void getData() {
        new AsyncTask<String, Integer, String>() {

            @Override
            protected String doInBackground(String... strings) {
                return HttpUtils.getFromHttpUrlConnection(strings[0]);
            }

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                Gson gson = new Gson();
                Banner banner = gson.fromJson(s, Banner.class);
                if (banner != null){
                    Banner.bodyBean body = banner.getBody();
                    if (body != null){
                        List<Banner.bodyBean.resultBean> result = body.getResult();
                        if (result != null){
                            if (!isLoadMore){
                                list.clear();
                            }
                            list.addAll(result);
                            adapter.notifyDataSetChanged();
                        }
                    }
                }
            }
        }.execute(URL + count);
    }
}

public class BannerAdapter extends BaseAdapter {
    private List<Banner.bodyBean.resultBean> list;
    private Context context;

    public BannerAdapter(List<Banner.bodyBean.resultBean> list, Context context) {
        this.list = list;
        this.context = context;
    }

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

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        viewHolder holder = null;
        if (convertView == null){
            convertView = View.inflate(context, R.layout.item_pic_01,null);
            holder = new viewHolder();
            holder.img_logo = convertView.findViewById(R.id.img_logo);
            holder.text_title = convertView.findViewById(R.id.text_title);
            convertView.setTag(holder);
        }else {
            holder = (viewHolder) convertView.getTag();
        }
        holder.text_title.setText(list.get(position).getBarnerName());
        ImageLoader.getInstance().displayImage(list.get(position).getBarnerPic(),holder.img_logo);
        return convertView;
    }

    public class viewHolder{
        ImageView img_logo;
        TextView text_title;
    }
}