If you need to refer to your pc host's localhost when your emu and pc in the 
same computer use 10.0.2.2 

127.0.0.1 refers to emulator localhost. 
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-----Original Message-----
From: Hal <dsheppar...@gmail.com>
Sender: android-developers@googlegroups.com
Date: Sat, 4 Dec 2010 16:28:07 
To: Android Developers<android-developers@googlegroups.com>
Reply-To: android-developers@googlegroups.com
Subject: [android-developers] Re: connect my phone(Galaxy 2.1) to PC using
 socket communication, which IP and port number should i use?

you need to determine the ip of your computer and the appropriate port
for the server. Client/Server should match.



On Dec 3, 12:43 am, Tantu <arungopa...@gmail.com> wrote:
> i want to connect my phone to PC using socket communication and my
> phone acts as a client in this communication. my code is working in
> emulator but not in phone.It shows  an error like this:
> "java.net.SocketException: network unreachable in android" while
> running.
>
> //code part//
>  socket = new Socket("127.0.0.1", 5228);

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