android设备如何获取以太网IP（插网线）？

android设备插网线的时候 ， 如何获取以太网IP ？

public static String getHostIP() {

    String hostIp = null;
    try {
        Enumeration nis = NetworkInterface.getNetworkInterfaces();
        InetAddress ia = null;
        while (nis.hasMoreElements()) {
            NetworkInterface ni = (NetworkInterface) nis.nextElement();
            Enumeration<InetAddress> ias = ni.getInetAddresses();
            while (ias.hasMoreElements()) {
                ia = ias.nextElement();
                if (ia instanceof Inet6Address) {
                    continue;// skip ipv6
                }
                String ip = ia.getHostAddress();
                if (!"127.0.0.1".equals(ip)) {
                    hostIp = ia.getHostAddress();
                    break;
                }
            }
        }
    } catch (SocketException e) {
        Log.i("yao", "SocketException");
        e.printStackTrace();
    }
    return hostIp;

}