Android手机获取Mac地址的方法

   private static String tryGetWifiMac(Context context) {     WifiManager wm = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);     WifiInfo wi = wm.getConnectionInfo();     if (wi == null || wi.getMacAddress() == null) {       return null;     }     if ("02:00:00:00:00:00".equals(wi.getMacAddress().trim())) {       return null;     } else {       return wi.getMacAddress().trim();     }   }