Android 127.0.0.1/localhost connection refused

In debugging, connect localhost or 127.0.0.1 through the android simulator.CodeProbably
URL url = new URL (urlstring );
Urlconnection urlconn = URL. openconnection ();

But an error is reported !!

Exception 1: java.net. connectexception: localhost/FIG: 8080-
Connection refused

The problem is that the android simulator uses itself as the localhost. That is to say, it uses localhost or 127.0.0.1 in the code to access the simulator itself! This cannot be done!

If you want to access your computer on the simulator, use the built-in Android IP address.10.0.2.210.0.2.2 is the specific IP address set by the simulator. It is the alias of your computer alias.

Remember to use 10.0.2.2 to access your computer on the simulator.