java.net.ConnectException: localhost/127.0.0.1:8080 - Connection refused

android手机做下载文件时，报了如下异常: 
java.net.ConnectException: localhost/127.0.0.1:8080 - 
Connection refused 

报错在这一段代码 

Java代码 
String xml=downloadXML("http://localhost:8080/mp3/resources.xml");

原来模拟器默认把localhost或者127.0.0.1当做本身了 

在网上查了下，在模拟器上可以用10.0.2.2代替127.0.0.1和localhost 

String xml=downloadXML("http://10.0.2.2:8080/mp3/resources.xml");

From http://stackoverflow.com

127.0.0.1 is a Android emulated device's own loopback interface.

In other words, you connect to android emulated device (not to your computer) by using 127.0.0.1.

To get connection to your machine with web-server use 10.0.2.2 or real machine IP address (if you have direct access from web).

Use command ipconfig(Windows)/ifconfig(Linux) to obtain your IP address.