Android Device Mac Address 가져오기

Wifi Mac address 말고 

휴대폰에도 각각의 MAC Address가 존재한다. 

다음과 같이 이용할 수 있다.

public static String getMacAddress() {
   try {
      List<NetworkInterface> all = Collections.list(NetworkInterface.getNetworkInterfaces());
      for (NetworkInterface nif : all) {
         if (!nif.getName().equalsIgnoreCase("wlan0")) continue;

         byte[] macBytes = nif.getHardwareAddress();
         if (macBytes == null) {
            return "";
         }

         StringBuilder res1 = new StringBuilder();
         for (byte b : macBytes) {
            res1.append(String.format("%02X",b));
         }

         if (res1.length() > 0) {
            res1.deleteCharAt(res1.length() - 1);
         }
         return res1.toString();
      }
   } catch (Exception ex) {
      //handle exception
   }
   return "";

}