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public static String getIpAddress() {
        try {
            for (Enumeration en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements(); ) {
                NetworkInterface intf = (NetworkInterface) en.nextElement();
                for (Enumeration enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements(); ) {
                    InetAddress inetAddress = (InetAddress) enumIpAddr.nextElement();
                    if (!inetAddress.isLoopbackAddress() && inetAddress instanceof Inet4Address) {
                       String ipAddress = inetAddress.getHostAddress().toString();
                        Log.d("IP address", "" + ipAddress);
                        return ipAddress;
                    }
                }
            }
        } catch (SocketException ex) {
            Log.e("Socket exception", ex.toString());
        }
        return null;
    }

String reqString = Build.MANUFACTURER
                + " " + Build.MODEL + " " + Build.VERSION.RELEASE
                + " " + Build.VERSION_CODES.class.getFields()[android.os.Build.VERSION.SDK_INT].getName();