public void SetBgImageURL(string bgImageURL)
 {
     if (bgImageURL != null)
     {
         Application app = GlobalApplication.GetGlobalApplicationContext();
         if (app == null)
         {
             throw new UnsupportedOperationException("needs com.kakao.GlobalApplication in order to use ImageLoader");
         }
         background.SetImageUrl(bgImageURL, ((GlobalApplication)app).GetImageLoader());
     }
 }
 /**
  * 프로필 이미지에 대해 view를 update한다.
  *
  * @param profileImageURL 화면에 반영할 프로필 이미지
  */
 public void SetProfileURL(string profileImageURL)
 {
     if (profile != null && profileImageURL != null)
     {
         Application app = GlobalApplication.GetGlobalApplicationContext();
         if (app == null)
         {
             throw new UnsupportedOperationException("needs com.kakao.GlobalApplication in order to use ImageLoader");
         }
         profile.SetImageUrl(profileImageURL, ((GlobalApplication)app).GetImageLoader());
     }
 }