xlistview下拉加载上拉刷新

记得要导入xlistview_library
1xml布局

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

2获取网络数据以及接口

package com.example.http.http;

import android.os.AsyncTask;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
lic class Http {
    public static void HttpAsynTask(String strUrl,final CallBackString backString){
        new AsyncTask<String, Integer, String>() {
            @Override
            protected String doInBackground(String... strings) {
                return requestHttpGet(strings[0]);
            }
            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                //接口回调的方法
                backString.getData(s);
            }
        }.execute(strUrl);
    }
    public interface CallBackString{
        void getData(String s);
    }
    public static String requestHttpGet(String strUrl){
        try {
            URL url = new URL(strUrl);
            HttpURLConnection connection =(HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.setConnectTimeout(5000);
            connection.setReadTimeout(5000);
                InputStream stream = connection.getInputStream();
                BufferedReader reader = new BufferedReader(new InputStreamReader(stream,"utf-8"));
                StringBuilder builder = new StringBuilder();
                String str="";
                while ((str=reader.readLine())!=null){
                    builder.append(str);
                }
            connection.disconnect();
            return builder.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

3activity方法
这是fragment

package com.example.http.frag;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.Toast;

import com.example.http.R;
import com.example.http.adapter.MyAdapter;
import com.example.http.bean.JsonBean;
import com.example.http.http.Http;
import com.google.gson.Gson;
import com.qy.xlistview.XListView;

import java.util.List;

public class FragMessage extends Fragment {

    private MyAdapter myAdapter;
    private List<JsonBean.DataBean> list;
    private XListView xListView;
    private String str="http://api.expoon.com/AppNews/getNewsList/type/1/p/1";


    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.fragmessage,container,false);
        //第二步找控件
        xListView = view.findViewById(R.id.xlistview);
        //第三步启动true或禁用false上拉加载（不写实现不了）
        xListView.setPullLoadEnable(true);
        //第四步：注册IXListViewListener
        xListView.setXListViewListener(new XListView.IXListViewListener() {
            @Override
            public void onRefresh() {//第九步下拉
                //刷新的回调 数据
                Http.HttpAsynTask(str, new Http.CallBackString() {
                    @Override
                    public void getData(String s) {
                        Gson gson = new Gson();
                        JsonBean bean = gson.fromJson(s, JsonBean.class);
                        //注意 data和adapter要提全局
                        list = bean.getData();
                        xListView.setAdapter(new MyAdapter(getActivity(),list));
                        onLoad();
                    }
                });
            }

            @Override
            public void onLoadMore() {//第八步上拉
                //加载数据调用的方法
                Http.HttpAsynTask(str, new Http.CallBackString() {
                    @Override
                    public void getData(String s) {
                        Gson gson = new Gson();
                        JsonBean bean = gson.fromJson(s, JsonBean.class);
                        List<JsonBean.DataBean> data = bean.getData();
                        //把数据放进集合中
                        list.addAll(data);
                        //刷新数据
                        myAdapter.notifyDataSetChanged();
                        onLoad();

                    }
                });

            }
        });
        Http.HttpAsynTask(str, new Http.CallBackString() {
            @Override
            public void getData(String s) {//s就是我们的数据
                //第六步解析
                Gson gson = new Gson();
                JsonBean bean = gson.fromJson(s, JsonBean.class);
                list = bean.getData();
                //第七步适配器
                myAdapter = new MyAdapter(getActivity(),list);
                xListView.setAdapter(myAdapter);
            }
        });
        return view;

    }
    private void onLoad() {
        //停止加载更多，重置头视图
        xListView.stopRefresh();
        //停止加载更多，重置脚视图
        xListView.stopLoadMore();
        //设置刷新时间
        xListView.setRefreshTime("刚刚刷新了");
    }

}

效果