上拉加載下拉刷新，ListView刷新加載

package com.example.com.shangxialashuaxin;

import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import com.bawei.jane.mxlistview.view.XListView;
import com.google.gson.Gson;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class MainActivity extends AppCompatActivity  {
String urldata="http://api.tianapi.com/social/?key=48a7d7193e11bd2dd4a683b6e2f90a4f&num=10";
    private XListView xlv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //1找到組件
        xlv = findViewById(R.id.xlv);
//進行配置
        xlv.setPullRefreshEnable(true);//支持下拉刷新
        xlv.setPullLoadEnable(true);//支持上拉加載

        //設置回掉監聽接口
        xlv.setXListViewListener(new XListView.IXListViewListener() {
            @Override
            public void onRefresh() {

            }

            @Override
            public void onLoadMore() {

            }

        });

main佈局文件中寫： <com.bawei.jane.mxlistview.view.XListView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/xlv"/>
注：然後在xml文件中配置： <uses-permission android:name="android.permission.INTERNET"></uses-permission>
適配器沒有改動
要導Gson包和universal-image-loader-1.9.3-with-sources.jar包
導mxlistview需要去配置，，如果studio中的版本過低，，需要下載高版本的

• datas();

• }

• private void datas(){

• mytask mytask = new mytask();

• mytask.execute();

• }

• class mytask extends AsyncTask<String,Void,String> {

• @Override protected String doInBackground(String... strings) {

• try {

• URL url = new URL(urldata);

•               HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); urlConnection.setRequestMethod("GET");

•               urlConnection.setReadTimeout(5000);

•                urlConnection.setConnectTimeout(5000); if (urlConnection.getResponseCode()==200){

•                   InputStream inputStream = urlConnection.getInputStream();

•                   String s = statemstring(inputStream); return s; }

•            } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }

•            return null; }

•       @Override protected void onPostExecute(String s) {

•           super.onPostExecute(s);

•           if (s!=null){

•                Gson gson = new Gson();

•               Bean bean = gson.fromJson(s, Bean.class);

•               Myadapter myadapter = new Myadapter(MainActivity.this, bean.getNewslist());

•               xlv.setAdapter(myadapter); }

•       }

•        public String statemstring(InputStream inputStream){

•           ByteArrayOutputStream outputStream=null; outputStream = new ByteArrayOutputStream();

•            byte[]b=new byte[1024]; int len; try { while ((len=inputStream.read(b))!=-1){

•                   outputStream.write(b,0,len); } } catch (IOException e) { e.printStackTrace(); }

•            return outputStream.toString(); } }}