安卓系统获取ip地址

[code]public static String getLocalIpAddress() {

        try {
            for (Enumeration<NetworkInterface> en = NetworkInterface
                    .getNetworkInterfaces(); en.hasMoreElements();) {
                NetworkInterface intf = en.nextElement();
                for (Enumeration<InetAddress> enumIpAddr = intf
                        .getInetAddresses(); enumIpAddr.hasMoreElements();) {
                    InetAddress inetAddress = enumIpAddr.nextElement();
                    if (!inetAddress.isLoopbackAddress()
                            && InetAddressUtils.isIPv4Address(inetAddress
                                    .getHostAddress())) {

                        return inetAddress.getHostAddress().toString();
                    }
                }
            }
        } catch (SocketException e) {
            Log.e("test", e.toString());
        }

        return null;
    }

[code]    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />