HTTPURLConnection+Listview

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package com.example.cai;

import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;

import android.app.Application;

public class Appp extends Application{
       @Override
        public void onCreate() {

            DisplayImageOptions options = new DisplayImageOptions.Builder()
                    .showImageOnLoading(R.drawable.ic_launcher)
                    .displayer(new FadeInBitmapDisplayer(2000)).cacheOnDisk(true)
                    .cacheInMemory(true).build();

            ImageLoaderConfiguration configs = new ImageLoaderConfiguration.Builder(
                    this).defaultDisplayImageOptions(options).threadPoolSize(5)
                    .build();

            ImageLoader.getInstance().init(configs);
            super.onCreate();
        }
   }

=====================================

package com.example.cai;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import bean.Datas;

import com.google.gson.Gson;
import com.nostra13.universalimageloader.core.ImageLoader;

import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity {

   private ListView lv;
   private MyAdapter adapter;
   Datas datas;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        lv = (ListView) findViewById(R.id.lv);

        initData();


        adapter = new MyAdapter();

        lv.setAdapter(adapter);
    }




   private void initData() {
       // TODO Auto-generated method stub
       new AsyncTask<String , String, String>() {

           @Override
           protected String doInBackground(String... params) {
               // TODO Auto-generated method stub
               return getNetData();
           }

           @Override
           protected void onPostExecute(String result) {
               // TODO Auto-generated method stub


               Gson gson = new Gson();
               datas = gson.fromJson(result, Datas.class);
               adapter.notifyDataSetChanged();
               Log.i("==========", datas.toString());
               super.onPostExecute(result);
           }



       }.execute();


   }




   protected String getNetData() {
       // TODO Auto-generated method stub
       String result = "";
       try {
           URL url = new URL("https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page=0");
              HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setRequestMethod("GET");
                int code = conn.getResponseCode();
                if(code == 200){
               InputStream inputStream = conn.getInputStream();
               ByteArrayOutputStream bos = new ByteArrayOutputStream();

               byte [] buff = new byte[1024];
               int len = 0;
               while((len = inputStream.read(buff)) != -1){
                   bos.write(buff, 0, len);
               }
               result = bos.toString();
                }
                } catch (Exception e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
       return result;

   }

   class MyAdapter extends BaseAdapter{

       @Override
       public int getCount() {
           // TODO Auto-generated method stub
           if (datas != null) {
               return datas.getNewslist().size();
           }
           return 0;
       }

       @Override
       public Object getItem(int position) {
           // TODO Auto-generated method stub
           return null;
       }

       @Override
       public long getItemId(int position) {
           // TODO Auto-generated method stub
           return 0;
       }

       @Override
       public View getView(int position, View convertView, ViewGroup parent) {
           // TODO Auto-generated method stub
           ViewHolder holder;
           if(convertView == null){
               convertView = View.inflate(MainActivity.this, R.layout.item, null);
               holder = new ViewHolder();
               holder.iv = (ImageView) convertView.findViewById(R.id.iv);
               holder.tv = (TextView) convertView.findViewById(R.id.tv);
               convertView.setTag(holder);
           }
           else{
               holder = (ViewHolder) convertView.getTag();
           }
           ImageLoader.getInstance().displayImage(datas.getNewslist().get(position).getPicUrl(), holder.iv);
           holder.tv.setText(datas.getNewslist().get(position).getTitle());
           return convertView;
       }

       class ViewHolder{
           ImageView iv;
           TextView tv;
       }

   }

}

===========================================

package bean;

import java.util.ArrayList;
import java.util.List;

public class Datas {

   String code;
   String msg;
   List<News> newslist = new ArrayList<News>();



   public String getCode() {
       return code;
   }

   public void setCode(String code) {
       this.code = code;
   }

   public String getMsg() {
       return msg;
   }

   public void setMsg(String msg) {
       this.msg = msg;
   }

   public List<News> getNewslist() {
       return newslist;
   }

   public void setNewslist(List<News> newslist) {
       this.newslist = newslist;
   }

   @Override
   public String toString() {
       return "Datas [code=" + code + ", msg=" + msg + ", newslist="
               + newslist + "]";
   }


}

====================================

package bean;

public class News {

   String picUrl;
   String title;


   public String getPicUrl() {
       return picUrl;
   }

   public void setPicUrl(String picUrl) {
       this.picUrl = picUrl;
   }

   public String getTitle() {
       return title;
   }

   public void setTitle(String title) {
       this.title = title;
   }

   @Override
   public String toString() {
       return "News [picUrl=" + picUrl + ", title=" + title + "]";
   }

}

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