Interstitial ads

Interstitial advertising is a full-screen ad format embedded within the app content during natural pauses, such as transitioning between game levels or completing a target action.

When an app displays an interstitial ad, the user can either click through to the advertiser's site or close the ad and return to the app.

During interstitial ad impressions, the user's attention is fully focused on the ad, which results in a higher cost for such impressions.

Appearance

This guide will show you how to integrate interstitial ads into a Flutter app. Besides code samples and instructions, it also contains format-specific recommendations and links to additional resources.

Prerequisite

Follow the Yandex Mobile Ads Flutter plugin integration steps described under Quick start.
Make sure that you have the latest version of the Yandex Mobile Ads Flutter plugin. If you're using mediation, update to the most recent single build version.

Implementation

Key steps for integrating interstitial ads:

Create and configure the InterstitialAdLoader ad loader.
Load the InterstitialAd object.
Register the InterstitialAdEventListener listener for ad callback methods.
Display the InterstitialAd object.

Features of interstitial ad integration

If the onAdFailedToLoad() callback returns an error, don't try to load a new ad again. If there's no other option, limit the number of ad load retries. This will help avoid constant unsuccessful requests and connection issues if there are limitations.

Loading ads

To load your interstitial ads, create an InterstitialAdLoader object.

You will need the ad unit ID (adUnitId) obtained from the Boost interface.

You can expand ad request parameters through AdRequest, by passing user interests, contextual page data, location, or other additional info. Adding extra context to ad requests can greatly improve ad relevance. To learn more, see Ad targeting.

The example below shows how to load an interstitial ad:

final _adLoader = InterstitialAdLoader();
InterstitialAd? _ad;

@override
void initState() {
  super.initState();
  YandexAds.initialize();
  _loadInterstitialAd();
}

Future<void> _loadInterstitialAd() async {
  try {
    _ad = await _adLoader.loadAd(
      adRequest: AdRequest(adUnitId: 'R-M-XXXXXX-Y'), // For debugging, you can use 'demo-interstitial-yandex'
    );
  } on AdRequestError catch (error) {
    // Ad failed to load with AdRequestError.
    // Attempting to load a new ad from the error handler is strongly discouraged.
  }
}

Displaying ads

Interstitial ads should be displayed during natural pauses in the app's usage. A good example of this would be impressions between game levels or when a user completes an action, such as downloading a file.

To track the interstitial ad lifecycle, set the InterstitialAdEventListener callback method listener for the InterstitialAd object.

To show an interstitial ad, use the show() method. Use the waitForDismiss() method to wait until the end of the view:

_showAd() async {
  _ad?.setAdEventListener(
      eventListener: InterstitialAdEventListener(
    onAdShown: () {
      // Called when ad is shown.
    },
    onAdFailedToShow: (error) {
      // Called when an InterstitialAd failed to show.
      // Destroy the ad so you don't show the ad a second time.
      _ad?.destroy();
      _ad = null;

      // Now you can preload the next interstitial ad.
      _loadInterstitialAd();
    },
    onAdClicked: () {
      // Called when a click is recorded for an ad.
    },
    onAdDismissed: () {
      // Called when ad is dismissed.
      // Destroy the ad so you don't show the ad a second time.
      _ad?.destroy();
      _ad = null;

      // Now you can preload the next interstitial ad.
      _loadInterstitialAd();
    },
    onAdImpression: (impressionData) {
      // Called when an impression is recorded for an ad.
    },
  ));
  await _ad?.show();
  await _ad?.waitForDismiss();
}

Releasing resources

Call the destroy() method for previously shown ads. That releases the resources and prevents memory leaks.

Don't store links to previously rendered ads.

You can use the onAdDismissed callback method for the following actions:

_ad?.setAdEventListener(
    eventListener: InterstitialAdEventListener(
        //...
        onAdDismissed: () {
          _ad?.destroy();
          _ad = null;
        },
        //...
    ));

Testing interstitial ad integration

Android

iOS

Using demo ad units for ad testing

Use test ads to check your interstitial ad integration and the app itself. To make sure that test ads are returned for each ad request, you can use a special demo ad placement ID.

Demo adUnitId: demo-interstitial-yandex.

Warning

Before publishing your app in the store, make sure to replace the demo placement ID with the real ID you obtained in the Boost interface.

For the list of all available demo ad placement IDs, see Demo ad units for testing.

Testing ad integration

You can check if your interstitial ads are integrated correctly using the SDK's built-in analyzer. A detailed report with the test results will appear in the log.

To view the report, search for the keyword “YandexAds” in Logcat, a tool for debugging Android apps.

adb logcat -v brief '*:S YandexAds'

If the integration is successful, the following message is returned:

adb logcat -v brief '*:S YandexAds'
mobileads$ adb logcat -v brief '*:S YandexAds'
I/YandexAds(13719): [Integration] Ad type interstitial was integrated successfully

If there are any interstitial ad integration issues, you'll get a detailed issue report and troubleshooting recommendations.

Using demo ad units for ad testing

Use test ads to check your ad integration and the app itself. To make sure that test ads are returned for each ad request, you can use a special demo ad placement ID.

Demo adUnitId: demo-interstitial-yandex.

Warning

Before publishing your app in the store, make sure to replace the demo placement ID with the real ID you obtained in the Boost interface.

For the list of all available demo ad placement IDs, see Demo ad units for testing.

Testing ad integration

You can test your ad integration using the native Console tool.

To view detailed logs, call the YandexAds class's enableLogging method.

YandexAds.enableLogging()

To view SDK logs, go to the Console tool and set Subsystem = com.mobile.ads.ads.sdk. You can filter logs by category or error level.

If you're having problems integrating ads, you'll get a detailed report on the issues and recommendations for how to fix them.

Tips

Ad preloading

Loading an ad may take several seconds, depending on the number of ad networks connected in Mobile Mediation and the user's internet speed. We recommend preloading ads before displaying them.

Call load in advance to display the loaded ad at the right moment.

To begin preloading the next ad immediately after serving the current one, you can link this process to the onAdDismissed() event.

If you cache ads on too many screens that are unlikely to be shown, your ad effectiveness could drop. For example, if users complete 2-3 game levels per session, you shouldn't cache ads for 6-7 screens. Your ad viewability could decrease otherwise, and the advertising system might deprioritize your app.

To ensure caching benefits your app, monitor the “Show rate” or “View rate” metrics in the Boost interface. If it's under 20%, you should probably revise your caching algorithm. The higher the percentage of impressions, the better.

Additional resources

Link to pub.dev.

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