using UnityEngine;     using UnityEngine.UI;     using UnityEngine.Advertisements;    public class BannerAdExample : MonoBehaviour    {      // For the purpose of this example, these buttons are for functionality testing:      [SerializeField] Button _loadBannerButton;      [SerializeField] Button _showBannerButton;      [SerializeField] Button _hideBannerButton;      [SerializeField] BannerPosition _bannerPosition = BannerPosition.BOTTOM_CENTER;      [SerializeField] string _androidAdUnitId = "Banner_Android";      [SerializeField] string _iOSAdUnitId = "Banner_iOS";      string _adUnitId = null; // This will remain null for unsupported platforms.      void Start()      {        // Get the Ad Unit ID for the current platform:        #if UNITY_IOS        _adUnitId = _iOSAdUnitId;        #elif UNITY_ANDROID        _adUnitId = _androidAdUnitId;        #endif        // Disable the button until an ad is ready to show:        _showBannerButton.interactable = false;        _hideBannerButton.interactable = false;        // Set the banner position:        Advertisement.Banner.SetPosition(_bannerPosition);        // Configure the Load Banner button to call the LoadBanner() method when clicked:        _loadBannerButton.onClick.AddListener(LoadBanner);        _loadBannerButton.interactable = true;      }      // Implement a method to call when the Load Banner button is clicked:      public void LoadBanner()      {          // Set up options to notify the SDK of load events:          BannerLoadOptions options = new BannerLoadOptions          {              loadCallback = OnBannerLoaded,              errorCallback = OnBannerError          };          // Load the Ad Unit with banner content:          Advertisement.Banner.Load(_adUnitId, options);      }      // Implement code to execute when the loadCallback event triggers:      void OnBannerLoaded()      {          Debug.Log("Banner loaded");          // Configure the Show Banner button to call the ShowBannerAd() method when clicked:          _showBannerButton.onClick.AddListener(ShowBannerAd);          // Configure the Hide Banner button to call the HideBannerAd() method when clicked:          _hideBannerButton.onClick.AddListener(HideBannerAd);          // Enable both buttons:          _showBannerButton.interactable = true;          _hideBannerButton.interactable = true;           }      // Implement code to execute when the load errorCallback event triggers:      void OnBannerError(string message)      {          Debug.Log($"Banner Error: {message}");          // Optionally execute additional code, such as attempting to load another ad.      }      // Implement a method to call when the Show Banner button is clicked:      void ShowBannerAd()      {          // Set up options to notify the SDK of show events:          BannerOptions options = new BannerOptions          {              clickCallback = OnBannerClicked,              hideCallback = OnBannerHidden,              showCallback = OnBannerShown          };          // Show the loaded Banner Ad Unit:          Advertisement.Banner.Show(_adUnitId, options);      }      // Implement a method to call when the Hide Banner button is clicked:      void HideBannerAd()      {          // Hide the banner:          Advertisement.Banner.Hide();      }      void OnBannerClicked() { }      void OnBannerShown() { }      void OnBannerHidden() { }      void OnDestroy()      {          // Clean up the listeners:          _loadBannerButton.onClick.RemoveAllListeners();          _showBannerButton.onClick.RemoveAllListeners();          _hideBannerButton.onClick.RemoveAllListeners();      }    }