android怎样通过WIFI在都没联网的情况下跟PC传数据

[wbssyywbssyy]

想做个类似无线鼠标的东西，通过WIFI来连接。初步设想是通过socket,在PC跟手机同时通过一个无线路由上网的情况下，用PC做服务器端往手机里传数据，手机客户端用PC外网的IP来连SOCKET，每次都连不上。有什么解决方法或者其他的实现方法吗？谢谢。

服务器端

public class TCPServerA {
	public static void main(String[] args) throws IOException {
        InetAddress AddressOne = InetAddress.getLocalHost();//返归本地主机的IP地址
        System.out.print("本地主机名和IP是：");
        System.out.println(AddressOne);
		ServerSocket ss = new ServerSocket(8879);
		Socket s = ss.accept();
		OutputStream os = s.getOutputStream();
		PrintWriter pw = new PrintWriter(os);
		pw.print("now time = " + new Date());
		pw.flush();
		pw.close();
		s.close();
		ss.close();
	}

手机客户端

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
		Log.d("socket","1");

		try {
			Log.d("socket","2");
			Socket s = new Socket("192.168.1.209",8879);
			Log.d("socket","3");
			InputStream is = s.getInputStream();
			InputStreamReader isr = new InputStreamReader(is);
			BufferedReader br = new BufferedReader(isr);
			String str = br.readLine();
			System.out.println(str);
		} catch (UnknownHostException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }