安卓初学--网络图片加载问题

package com.zjc.zjchomework;







import java.io.IOException;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;



import com.zjc.zjchomework.R;



import android.app.Activity;

import android.app.ProgressDialog;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.os.Bundle;

import android.os.Handler;

import android.os.Looper;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.Toast;



public class ImageViewActivity extends Activity

{

	public String urlString;

	ListView mListView = null;	

	private ImageView imageIV;

	private Handler handler=new Handler(); //在主线程中创建handler

	private ImageService service;

	@Override

    public void onCreate(Bundle savedInstanceState) 

	{		

		super.onCreate(savedInstanceState); 		 

		setContentView(R.layout.imageview_);

    	Intent intent=getIntent();

    	//打开“邮件”    	

		//Bundle urlBundle = intent.getBundleExtra("urlAdress");

		//获得网络图片地址

		urlString = "http://m4.auto.itc.cn/car/120/95/90/Img1579095_120.jpg";//urlBundle.getString("url");

    	imageIV = (ImageView) this.findViewById(R.id.imageView1);      	

		ShowImageFromURL("http://m4.auto.itc.cn/car/120/95/90/Img1579095_120.jpg");

	} 



    public void ShowImageFromURL(final String url)

    {

    	//把图片放在一个新的线程里面来读取.        

        new Thread()

        {//创建一个新的线程

            public void run()

            {

                try {                	 

                    String address = "http://m4.auto.itc.cn/car/120/95/90/Img1579095_120.jpg";// addressET.getText().toString();                                                                 

                    //由于网络操作比较耗时，所以在新线程中操作

                    final Bitmap image = service.getImage(address);

                    handler.post(new Runnable() 

                    {

                        public void run() 

                        {                                                      

                            imageIV.setImageBitmap(image);//新线程更新界面，需要使用handler

                        }

                    });

                } 

                catch (Exception e) 

                {

                    e.printStackTrace();

                    Toast.makeText(getApplicationContext(), "服务器忙，请稍后再试！", 0).show();

                }

            }

        }.start();

       

    }

}

/*

 * 

 * */