private static void HandleImageData(bool success, Applicasa.Error error, Applicasa.FileCache.ByteArray data)
 {
     if (success)
     {
         imageData = Applicasa.FileCache.GetByteArray(data);
     }
     else
     {
         Debug.Log("LiLog_Unity " + System.DateTime.Now.ToShortTimeString() + ": Get image error " + error.Id + "-" + error.Message);
         imageData = new byte[0];
     }
 }