以太网MAC地址获得 android

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

    protected InetAddress getLocalInetAddress() {        InetAddress ip = null;        try {            Enumeration<NetworkInterface> en_netInterface = NetworkInterface.getNetworkInterfaces();            while (en_netInterface.hasMoreElements()) {                NetworkInterface ni = (NetworkInterface) en_netInterface.nextElement();                Enumeration<InetAddress> en_ip = ni.getInetAddresses();                while (en_ip.hasMoreElements()) {                    ip = en_ip.nextElement();                    if (!ip.isLoopbackAddress() && ip.getHostAddress().indexOf(":") == -1)                        break;                    else                        ip = null;                }                if (ip != null) {                    break;                }            }        } catch (SocketException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return ip;    }    protected String getMacAddress() /* throws UnknownHostException */{        String strMacAddr = null;        try {            InetAddress ip = getLocalInetAddress();            byte[] b = NetworkInterface.getByInetAddress(ip).getHardwareAddress();            StringBuffer buffer = new StringBuffer();            for (int i = 0; i < b.length; i++) {                if (i != 0) {                    buffer.append('-');                }                String str = Integer.toHexString(b[i] & 0xFF);                buffer.append(str.length() == 1 ? 0 + str : str);            }            strMacAddr = buffer.toString().toUpperCase();        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return strMacAddr;    }

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