android 从tomcat读取文件出错：connect failed: ECONNREFUSED

java.net.ConnectException: failed to connect to localhost/127.0.0.1 (port 8080):
connect
failed: ECONNREFUSED (Connection refused)

...

....

....

解决方法：

String url = "http://localhost:8080/notice/test.txt";  修改成 String url = "http://本机IP:8080/notice/test.txt";

主机ip不能使用localhost或者127.0.0.1，使用真实ip地址即可。