Интегрируйте API WebView для рекламы

MobileAds.initialize(
    this@MainActivity,
    // Use this application ID to initialize the GMA Next-Gen SDK if
    // you don't have an AdMob application ID.
    InitializationConfig.Builder(InitializationConfig.WEBVIEW_APIS_FOR_ADS_APPLICATION_ID)
        .build(),
  ) {
    // Adapter initialization complete.
  }

MobileAds.initialize(
    this,
    // Use this application ID to initialize the GMA Next-Gen SDK if
    // you don't have an AdMob application ID.
    new InitializationConfig.Builder(InitializationConfig.WEBVIEW_APIS_FOR_ADS_APPLICATION_ID)
        .build(),
        initializationStatus -> {
          // Adapter initialization is complete.
          });

import android.webkit.CookieManager
import android.webkit.WebView
import com.google.android.libraries.ads.mobile.sdk.MobileAds

class MainActivity : AppCompatActivity() {
  lateinit var webView: WebView

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    webView = findViewById(R.id.webview)

    // Let the web view accept third-party cookies.
    CookieManager.getInstance().setAcceptThirdPartyCookies(webView, true)
    // Let the web view use JavaScript.
    webView.settings.javaScriptEnabled = true
    // Let the web view access local storage.
    webView.settings.domStorageEnabled = true
    // Let HTML videos play automatically.
    webView.settings.mediaPlaybackRequiresUserGesture = false

    // Register the web view.
    MobileAds.registerWebView(webView)
  }
}

import android.webkit.CookieManager;
import android.webkit.WebView;
import com.google.android.libraries.ads.mobile.sdk.MobileAds;

public class MainActivity extends AppCompatActivity {
  private WebView webView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    webView = findViewById(R.id.webview);

    // Let the web view accept third-party cookies.
    CookieManager.getInstance().setAcceptThirdPartyCookies(webView, true);
    // Let the web view use JavaScript.
    webView.getSettings().setJavaScriptEnabled(true);
    // Let the web view access local storage.
    webView.getSettings().setDomStorageEnabled(true);
    // Let HTML videos play automatically.
    webView.getSettings().setMediaPlaybackRequiresUserGesture(false);

    // Register the web view.
    MobileAds.registerWebView(webView);
  }
}