fix new version applocalization

covas_mobile_old/lib/classes/ad_helper.dart

@@ -0,0 +1,27 @@
+import 'package:google_mobile_ads/google_mobile_ads.dart';
+import 'package:flutter_dotenv/flutter_dotenv.dart';
+
+class AdHelper {
+  static Future<BannerAd> createBannerAd(Function setStateCallback) async {
+    await dotenv.load(fileName: ".env");
+    final adUnitId = dotenv.env['AD_UNIT_ID'] ?? '';
+
+    BannerAd bannerAd = BannerAd(
+      adUnitId: adUnitId,
+      size: AdSize.banner,
+      request: AdRequest(),
+      listener: BannerAdListener(
+        onAdLoaded: (ad) {
+          setStateCallback(() {});
+        },
+        onAdFailedToLoad: (ad, error) {
+          print('Banner Ad failed to load: $error');
+          ad.dispose();
+        },
+      ),
+    );
+
+    bannerAd.load();
+    return bannerAd;
+  }
+}