interactive_media_ads

Flutter plugin for the Interactive Media Ads SDKs.

IMA SDKs make it easy to integrate multimedia ads into your websites and apps. IMA SDKs can request ads from any VAST-compliant ad server and manage ad playback in your apps. With IMA client-side SDKs, you maintain control of content video playback, while the SDK handles ad playback. Ads play in a separate video player positioned on top of the app's content video player.

NOTE:

• Companion ads, Background Audio ads and Google Dynamic Ad Insertion methods are currently not supported.

IMA client-side overview

Implementing IMA client-side involves five main SDK components, which are demonstrated in this guide:

• AdDisplayContainer: A container object where ads are rendered.
• AdsLoader: Requests ads and handles events from ads request responses. You should only instantiate one ads loader, which can be reused throughout the life of the application.
• AdsRequest: An object that defines an ads request. Ads requests specify the URL for the VAST ad tag, as well as additional parameters, such as ad dimensions.
• AdsManager: Contains the response to the ads request, controls ad playback, and listens for ad events fired by the SDK.
• AdsManagerDelegate: Handles ad events and errors that occur during ad or stream initialization and playback.

Usage

This guide demonstrates how to integrate the IMA SDK into a new Widget using the video_player plugin to display content.

1. Add Android Required Permissions

If building on Android, add the user permissions required by the IMA SDK for requesting ads in android/app/src/main/AndroidManifest.xml.

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- Required permissions for the IMA SDK -->
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

2. Add Imports

Add the import statements for the interactive_media_ads and video_player. Both plugins should already be added to your pubspec.yaml.

import 'package:interactive_media_ads/interactive_media_ads.dart';
import 'package:video_player/video_player.dart';

3. Create a New Widget

Create a new StatefulWidget that handles displaying Ads and playing content.

/// Example widget displaying an Ad before a video.
class AdExampleWidget extends StatefulWidget {
  /// Constructs an [AdExampleWidget].
  const AdExampleWidget({super.key});

  @override
  State<AdExampleWidget> createState() => _AdExampleWidgetState();
}

class _AdExampleWidgetState extends State<AdExampleWidget>
    with WidgetsBindingObserver {
  // IMA sample tag for a pre-, mid-, and post-roll, single inline video ad. See more IMA sample
  // tags at https://developers.google.com/interactive-media-ads/docs/sdks/html5/client-side/tags
  static const String _adTagUrl =
      'https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/vmap_ad_samples&sz=640x480&cust_params=sample_ar%3Dpremidpost&ciu_szs=300x250&gdfp_req=1&ad_rule=1&output=vmap&unviewed_position_start=1&env=vp&impl=s&cmsid=496&vid=short_onecue&correlator=';

  // The AdsLoader instance exposes the request ads method.
  late final AdsLoader _adsLoader;

  // AdsManager exposes methods to control ad playback and listen to ad events.
  AdsManager? _adsManager;

  // ···
  // Whether the widget should be displaying the content video. The content
  // player is hidden while Ads are playing.
  bool _shouldShowContentVideo = false;

  // Controls the content video player.
  late final VideoPlayerController _contentVideoController;

  // Periodically updates the SDK of the current playback progress of the
  // content video.
  Timer? _contentProgressTimer;

  // Provides the SDK with the current playback progress of the content video.
  // This is required to support mid-roll ads.
  final ContentProgressProvider _contentProgressProvider =
      ContentProgressProvider();
  // ···
  @override
  Widget build(BuildContext context) {
    // ···
  }
}

4. Add the Video Players

Instantiate the AdDisplayContainer for playing Ads and the VideoPlayerController for playing content.

late final AdDisplayContainer _adDisplayContainer = AdDisplayContainer(
  onContainerAdded: (AdDisplayContainer container) {
    _adsLoader = AdsLoader(
      container: container,
      onAdsLoaded: (OnAdsLoadedData data) {
        final AdsManager manager = data.manager;
        _adsManager = data.manager;

        manager.setAdsManagerDelegate(AdsManagerDelegate(
          onAdEvent: (AdEvent event) {
            debugPrint('OnAdEvent: ${event.type} => ${event.adData}');
            switch (event.type) {
              case AdEventType.loaded:
                manager.start();
              case AdEventType.contentPauseRequested:
                _pauseContent();
              case AdEventType.contentResumeRequested:
                _resumeContent();
              case AdEventType.allAdsCompleted:
                manager.destroy();
                _adsManager = null;
              case AdEventType.clicked:
              case AdEventType.complete:
              case _:
            }
          },
          onAdErrorEvent: (AdErrorEvent event) {
            debugPrint('AdErrorEvent: ${event.error.message}');
            _resumeContent();
          },
        ));

        manager.init(settings: AdsRenderingSettings(enablePreloading: true));
      },
      onAdsLoadError: (AdsLoadErrorData data) {
        debugPrint('OnAdsLoadError: ${data.error.message}');
        _resumeContent();
      },
    );

    // Ads can't be requested until the `AdDisplayContainer` has been added to
    // the native View hierarchy.
    _requestAds(container);
  },
);

@override
void initState() {
  super.initState();
  // ···
  _contentVideoController = VideoPlayerController.networkUrl(
    Uri.parse(
      'https://storage.googleapis.com/gvabox/media/samples/stock.mp4',
    ),
  )
    ..addListener(() {
      if (_contentVideoController.value.isCompleted) {
        _adsLoader.contentComplete();
      }
      setState(() {});
    })
    ..initialize().then((_) {
      // Ensure the first frame is shown after the video is initialized, even before the play button has been pressed.
      setState(() {});
    });
}

5. Implement the build Method

Return a Widget that contains the ad player and the content player.

@override
Widget build(BuildContext context) {
  return Scaffold(
    body: Center(
      child: SizedBox(
        width: 300,
        child: !_contentVideoController.value.isInitialized
            ? Container()
            : AspectRatio(
                aspectRatio: _contentVideoController.value.aspectRatio,
                child: Stack(
                  children: <Widget>[
                    // The display container must be on screen before any Ads can be
                    // loaded and can't be removed between ads. This handles clicks for
                    // ads.
                    _adDisplayContainer,
                    if (_shouldShowContentVideo)
                      VideoPlayer(_contentVideoController)
                  ],
                ),
              ),
      ),
    ),
    floatingActionButton:
        _contentVideoController.value.isInitialized && _shouldShowContentVideo
            ? FloatingActionButton(
                onPressed: () {
                  setState(() {
                    _contentVideoController.value.isPlaying
                        ? _contentVideoController.pause()
                        : _contentVideoController.play();
                  });
                },
                child: Icon(
                  _contentVideoController.value.isPlaying
                      ? Icons.pause
                      : Icons.play_arrow,
                ),
              )
            : null,
  );
}

6. Request Ads

Handle requesting ads and add event listeners to handle when content should be displayed or hidden.

Future<void> _requestAds(AdDisplayContainer container) {
  return _adsLoader.requestAds(AdsRequest(
    adTagUrl: _adTagUrl,
    contentProgressProvider: _contentProgressProvider,
  ));
}

Future<void> _resumeContent() async {
  setState(() {
    _shouldShowContentVideo = true;
  });

  if (_adsManager != null) {
    _contentProgressTimer = Timer.periodic(
      const Duration(milliseconds: 200),
      (Timer timer) async {
        if (_contentVideoController.value.isInitialized) {
          final Duration? progress = await _contentVideoController.position;
          if (progress != null) {
            await _contentProgressProvider.setProgress(
              progress: progress,
              duration: _contentVideoController.value.duration,
            );
          }
        }
      },
    );
  }

  await _contentVideoController.play();
}

Future<void> _pauseContent() {
  setState(() {
    _shouldShowContentVideo = false;
  });
  _contentProgressTimer?.cancel();
  _contentProgressTimer = null;
  return _contentVideoController.pause();
}

7. Dispose Resources

Dispose the content player and destroy the AdsManager.

@override
void dispose() {
  super.dispose();
  _contentProgressTimer?.cancel();
  _contentVideoController.dispose();
  _adsManager?.destroy();
  // ···
}

That‘s it! You’re now requesting and displaying ads with the IMA SDK. To learn about additional SDK features, see the API reference.

Contributing

For information on contributing to this plugin, see CONTRIBUTING.md.