android 9.0获取mac地址的方法

在机顶盒开发过程中，需要获取mac地址，下面把代码分享下：

 public static String getLocalMacIdFromIp(){        String strMacAddr = "";        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().toLowerCase();        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return strMacAddr;    }    /**     * 获取设备本地IP     */    protected static InetAddress getLocalInetAddress() {        InetAddress ip = null;        try {            //列举            Enumeration en_netInterface = NetworkInterface.getNetworkInterfaces();            while (en_netInterface.hasMoreElements()) {//是否还有元素                NetworkInterface ni = (NetworkInterface) en_netInterface.nextElement();//得到下一个元素                Enumeration en_ip = ni.getInetAddresses();//得到一个ip地址的列举                while (en_ip.hasMoreElements()) {                    ip = (InetAddress) en_ip.nextElement();                    if (!ip.isLoopbackAddress() && ip.getHostAddress().indexOf(":") == -1)                        break;                    else                        ip = null;                }                if (ip != null) {                    break;                }            }        } catch (Exception e) {            e.printStackTrace();        }        return ip;    }

亲测可行，可以实现该功能

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