Android 筆記 - 抓取 WIFI MAC & IP

 權限：

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

程式碼：

public static String getMacAddress(Context context) {
    WifiManager wifiMan = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);
       WifiInfo wifiInf = wifiMan.getConnectionInfo();
       return wifiInf.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 "02:00:00:00:00:00";
              }

              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 e) {
   e.printStackTrace();
      }
      return "02:00:00:00:00:00";

      if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
   device_serial = Settings.Secure.getString(getContentResolver(), Settings.Secure.ANDROID_ID);
} else {
   device_serial = Build.SERIAL;
}

   try {
       // Create MD5 Hash
       MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
       digest.update(device_serial.getBytes());
       byte messageDigest[] = digest.digest();

       // Create Hex String
       StringBuilder hexString = new StringBuilder();
       for (byte aMessageDigest : messageDigest) {
           String h = Integer.toHexString(0xFF & aMessageDigest);
           while (h.length() < 2)
               h = "0" + h;
           hexString.append(h);
       }
       device_serial = hexString.toString();

} catch (NoSuchAlgorithmException e) {
       e.printStackTrace();
}

Android 10强制要求MAC是随机的，上面的方法取得也是随机的，真实的IP需要使用DevicePolicyManager.getWifiMacAddress(@NonNull ComponentName admin).这个权限基本没有，大家可以不用想了。

藍芽MAC ?

public static String getIPAddress(Context context) {
       WifiManager wifiMan = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
       WifiInfo wifiInf = wifiMan.getConnectionInfo();
       long ip = wifiInf.getIpAddress();
       if( ip != 0 )
              return String.format( "%d.%d.%d.%d",
                     (ip & 0xff),
                     (ip >> 8 & 0xff),
                     (ip >> 16 & 0xff),
                     (ip >> 24 & 0xff));
       try {
              for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
                     NetworkInterface intf = en.nextElement();
                     for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                            InetAddress inetAddress = enumIpAddr.nextElement();
                            if (!inetAddress.isLoopbackAddress()) {
                                   return inetAddress.getHostAddress().toString();
                            }
                     }
              }
       } catch (Exception e) {
        }
       return "0.0.0.0";
}

String androidId = Settings.Secure.getString(getContentResolver(), Settings.Secure.ANDROID_ID);

String uuid = UUID.randomUUID().toString();