Listview 多条目展示_AsyncTask

package com.example.day0906;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;

import com.google.gson.Gson;

import android.R.integer;
import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.ListView;

public class MyAsyncTask extends AsyncTask<String, integer, String> {
  static DataBean mDatabean;
     Context con;
     String url;
     String type;
     ListView listView;
     public MyAsyncTask(Context con, String url, String type, ListView listView) {
         super();
         this.url=url;
         this.con=con;
         this.type=type;
         this.listView=listView;

     }

     //网络请求
     public void GetDatas(String murl, String mtype) {
         //头条服务器地址
         try {
             URL url = new URL(murl);
             //打开连接
             HttpURLConnection connection = (HttpURLConnection) url.openConnection();
             //设置
             connection.setRequestMethod(mtype);
             connection.setConnectTimeout(5000);
             connection.setReadTimeout(5000);

             //post方式要提交参数给服务器...以流的方式提交给服务器
             connection.setDoOutput(true);
             //设置请求参数的类型
             //connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

             String params = "key=8d6e3228d25298f13af4fc40ce6c9679&num=10";
             //参数以流的形式写给服务器...字节数组的形式写出去
             connection.getOutputStream().write(params.getBytes());

             //响应
             int responseCode = connection.getResponseCode();
             if (responseCode == 200) {
                 //获取输入字节流
                 InputStream inputStream = connection.getInputStream();

                 String json = streamToString(inputStream, "utf-8");

                 Log.i("json", json);
                 //解析...解析完成之后发送到主线程,设置适配器
                 Gson gson = new Gson();
                 mDatabean = gson.fromJson(json, DataBean.class);
                 Log.i("json", mDatabean.getCode());

             }

         } catch (Exception e) {
             e.printStackTrace();
         }

     }

     private String streamToString(InputStream inputStream, String charset) {
         try {
             InputStreamReader inputStreamReader = new InputStreamReader(inputStream, charset);

             BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
             String s = null;
             StringBuilder builder = new StringBuilder();
             while ((s = bufferedReader.readLine()) != null) {
                 builder.append(s);
             }

             bufferedReader.close();
             return builder.toString();

         } catch (Exception e) {
             e.printStackTrace();
         }

         return null;
     }

     @Override
     protected void onPostExecute(String s) {
         super.onPostExecute(s);
         List<DataBean.NewslistBean> listbean=mDatabean.getNewslist();
         //设置适配器
         MyAdapter myAdapter = new MyAdapter(listbean,con);
         listView.setAdapter(myAdapter);

     }

     public MyAsyncTask() {
         super();
     }

     @Override
     protected String doInBackground(String... strings) {
         GetDatas(url, type);
         return null;
     }

}