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();     }   }