import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.os.Handler;

import android.os.Message;

import android.widget.ImageView;

public class HttpUtils {

//工具类直接定义成静态方法即可

/url用于内部类中，所以要将其设定为final类型/

/读取完成需要通知主线程，需要使用handler/

public static void getNewsJSON(final String url,final Handler handler){

//访问网络，时间长，开启新线程

new Thread(new Runnable(){

@Override

public void run() {

// TODO Auto-generated method stub

HttpURLConnection conn ;

InputStream is ;

try {

conn = (HttpURLConnection) new URL(url).openConnection() ;

//GET方式获取

conn.setRequestMethod("GET") ;

//得到输入流

is=conn.getInputStream() ;

//读取数据用缓冲,里面要传入一个reader

BufferedReader reader = new BufferedReader(new InputStreamReader(is));

//一行一行读取数据

String line = "";

//没读完一行进行拼接,高效

StringBuilder result = new StringBuilder();

while((line = reader.readLine()) != null){

result.append(line);

}

Message msg = new Message() ;

//msg.obj可以放进去任何对象

msg.obj = result.toString() ;

handler.sendMessage(msg) ;

} catch (Exception e) {

e.printStackTrace();

}

}}).start() ;

}

public static void setPicBitMap(final ImageView ivPic,final String pic_url){

new Thread(new Runnable(){

@Override

public void run() {

// TODO Auto-generated method stub

try {

HttpURLConnection conn = (HttpURLConnection) new URL(pic_url).openConnection() ;

conn.connect() ;

InputStream is = conn.getInputStream() ;

//bitmap就是所需图片资源

/从资源文件中的到图片/

Bitmap bitmap = BitmapFactory.decodeStream(is) ;

ivPic.setImageBitmap(bitmap) ;

is.close() ;

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}).start() ;

}

}

import java.util.List;

import com.MR.news.R;

import com.MR.news.model.News;

import com.MR.news.utils.HttpUtils;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ImageView;

import android.widget.TextView;

public class NewsAdapter extends BaseAdapter {

//声明上下文对象，后面的getView方法需要

private Context context;

private List newsList;

public NewsAdapter(Context context,List newsList){

this.context = context ;

this.newsList = newsList ;

}

@Override

public int getCount() {

// TODO Auto-generated method stub

return newsList.size();

}

@Override

public Object getItem(int position) {

// TODO Auto-generated method stub

return newsList.get(position);

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

@Override

public View getView(int position,View convertView,ViewGroup arg2) {

// TODO Auto-generated method stub

if(convertView == null){

convertView = LayoutInflater.from(context).inflate(R.layout.news_item,null) ;

}

TextView tvTitle = (TextView) convertView.findViewById(R.id.tvTitle) ;

TextView tvDesc = (TextView) convertView.findViewById(R.id.tvDesc) ;

TextView tvTime = (TextView) convertView.findViewById(R.id.tvTime) ;

ImageView ivPic = (ImageView) convertView.findViewById(R.id.ivPic);

News news = newsList.get(position) ;

tvTitle.setText(news.getTitle()) ;

tvDesc.setText(news.getDesc()) ;

tvTime.setText(news.getTime()) ;

String pic_url = news.getPic_url() ;

HttpUtils.setPicBitMap(ivPic,pic_url) ;

return convertView;

}

}