android平台上的文件下载,文件和文件的操作(3)

         
         
    } 
     
} 
下面是下载
Java代码 
package duohuo.teng.net; 
 
import java.io.BufferedReader; 
import java.io.File; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.net.HttpURLConnection; 
import java.net.MalformedURLException; 
import java.net.URL; 
import java.net.URLConnection; 
 
 
public class HttpDownloadUtil { 
 
     
    /*将文件保存为String
     * @param urlStr 本机测试是不是ip不是localhost和127.0.0.1,这是指android的IP,电脑是10.0.2.2
     * */ 
    public String downloadString(String urlStr){ 
        StringBuffer result=new StringBuffer();; 
        URL url; 
        InputStream in = null; 
        BufferedReader reader=null; 
        try { 
             url=new URL(urlStr); 
             HttpURLConnection con=(HttpURLConnection)url.openConnection(); 
             in=con.getInputStream(); 
             
        reader=new BufferedReader(new InputStreamReader(in)); 
         
        String line; 
        while((line=reader.readLine())!=null){ 
            result.append(line); 
        }    
             
        } catch (MalformedURLException e) { 
            e.printStackTrace(); 
        }catch (IOException e) { 
            e.printStackTrace(); 
        }finally{ 
            try { 
                if(reader!=null)