Android -- 获取IP和MAC地址

<uses-permission android:name="android.permission.INTERNET"/>   <!--必写-->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>  <!--必写—>

<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />

// 得到本机ip地址
    public String getLocalHostIp()
    {
        String ipaddress = "";
        try
        {
            Enumeration<NetworkInterface> en = NetworkInterface
                    .getNetworkInterfaces();
            // 遍历所用的网络接口
            while (en.hasMoreElements())
            {
                NetworkInterface nif = en.nextElement();// 得到每一个网络接口绑定的所有ip
                Enumeration<InetAddress> inet = nif.getInetAddresses();
                // 遍历每一个接口绑定的所有ip
                while (inet.hasMoreElements())
                {
                    InetAddress ip = inet.nextElement();
                    if (!ip.isLoopbackAddress()
                            && InetAddressUtils.isIPv4Address(ip
                                    .getHostAddress()))
                    {
                        return ipaddress = "本机的ip是" + "：" + ip.getHostAddress();
                    }
                }

            }
        }
        catch (SocketException e)
        {
            Log.e("feige", "获取本地ip地址失败");
            e.printStackTrace();
        }
        return ipaddress;

    }

    // 得到本机Mac地址
    public String getLocalMac()
    {
        String mac = "";
        // 获取wifi管理器
        WifiManager wifiMng = (WifiManager) getSystemService(Context.WIFI_SERVICE);
        WifiInfo wifiInfor = wifiMng.getConnectionInfo();
        mac = "本机的mac地址是：" + wifiInfor.getMacAddress();
        return mac;
    }