Android机顶盒取网卡的Mac地址

android机顶盒上一般有两个网卡，一个有线一个无线，那么在获取mac地址来唯一标识一台终端的时候取那个呢？经过讨论，取有线的Mac地址。但是当前如果我只用的是wifi呢？怎么取有线网卡的mac地址，经过观察settings里面的源码，发现了获取有线网卡mac地址的方法，即使当前机顶盒连接时wifi，如下：

 public String getEth0HW(){
     EthernetManager ethManager = (EthernetManager) getSystemService(Context.ETHERNET_SERVICE);
     String str = ethManager.getEthernetHwaddr(ethManager.getEthernetIfaceName());
     if(null == str){
         str = "null";
     }
     return str ;
 }

/**
* 获取wifi模块的mac地址，即使wifi是关闭的，需要添加权限 ACCESS_WIFI_STATE
* @param context
* @return
*/
public static String getWifiMac(Context context){
       WifiManager wifi = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
       WifiInfo info = wifi.getConnectionInfo();
       String mac = info.getMacAddress();
       Log.e("","wifi mac : " + mac);
       return mac ;
    }

下面的方法是取当前连接网络的mac地址：

 获取当前连接网络的网卡的mac地址
 private static String parseByte(byte b) {
         String s = "00" + Integer.toHexString(b)+":";
         return s.substring(s.length() - 3);
 }

     /**
      * 获取当前系统连接网络的网卡的mac地址
      * @return
      */
     @SuppressLint("NewApi")
     public static final String getMac() {
         byte[] mac = null;
         StringBuffer sb = new StringBuffer();
         try {
             Enumeration netInterfaces = NetworkInterface.getNetworkInterfaces();
             while (netInterfaces.hasMoreElements()) {
                 NetworkInterface ni = netInterfaces.nextElement();
                 Enumeration address = ni.getInetAddresses();

                 while (address.hasMoreElements()) {
                     InetAddress ip = address.nextElement();
                     if (ip.isAnyLocalAddress() || !(ip instanceof Inet4Address) || ip.isLoopbackAddress())
                         continue;
                     if (ip.isSiteLocalAddress())
                         mac = ni.getHardwareAddress();
                     else if (!ip.isLinkLocalAddress()) {
                         mac = ni.getHardwareAddress();
                         break;
                     }
                 }
             }
         } catch (SocketException e) {
             e.printStackTrace();
         }

         if(mac != null){
             for(int i=0 ;i
                 sb.append(parseByte(mac[i]));
             }
             return sb.substring(0, sb.length()-1);
         }else{
             return UpdateService.mDefaultMacAddress;
         }
     }
 }

转账自：http://blog.csdn.net/android_dong/article/details/17447841