Engage SDK Health and Fitness: Third-party technical integration instructions

Google is building an on-device surface that organizes users' apps by verticals and enables a new immersive experience for personalized app content consumption and discovery. This fullscreen experience provides developer partners with an opportunity to showcase their best rich content in a dedicated channel outside of their app.This guide contains instructions for developer partners to integrate their health and fitness content, using the Engage SDK to populate this new surface area.

Integration detail

Terminology

This integration includes the following three cluster types: Recommendation, Featured, and Continuation.

• Recommendation clusters show personalized health and fitness suggestions from an individual developer partner. These recommendations can be personalized to the user or generalized (for example, trending fitness & health). Use these to surface articles or people related to health and fitness.

  • A Recommendation cluster can be made of ArticleEntity, PersonEntity, or EventEntity but not a mix of different entity types.

  Your recommendations take the following structure:

  • Recommendation Cluster: A UI view that contains a group of recommendations from the same developer partner.

  • Entity: An object representing a single item in a cluster. This integration offers some entities that would be surfaced using the Recommendation Cluster:

    • ArticleEntity: ArticleEntity represents a recommendation for text-based content related to health & fitness. It can be used for articles, blogposts, marketing content, news snippets, etc.

      

    • PersonEntity: PersonEntity represents a person. The recommendations could be to highlight a coach or any person related to health and fitness, etc.

      

    • EventEntity: EventEntity represents an event happening in the future. Event start time is a critical piece of information that needs to be conveyed to the users This entity could be used for surfacing events like blood donation camp, training sessions, gym or yoga classes etc. related to health and fitness.

      

• The Continuation cluster shows content recently engaged by users from multiple developer partners in a single UI grouping. Each developer partner will be allowed to broadcast a maximum of 10 entities in the Continuation cluster.

  Your continuation content can take the following structure:

  • ArticleEntity: ArticleEntity represents a recommendation for text-based content that is related to health & fitness. This entity can be used to represent unfinished news articles or other content that the user would like to continue consuming from where they left it. Ex: News snippet, blogpost snippet about health or fitness related topics.

    

  • EventReservationEntity: EventReservationEntity represents reservation for an event and helps users track upcoming or ongoing fitness and health events reservations. Ex: Training sessions

    

• The Featured cluster showcases a selection of entities from multiple developer partners in one UI grouping. There will be a single Featured cluster, which is surfaced near the top of the UI with a priority placement above all Recommendation clusters. Each developer partner will be allowed to broadcast up to 10 entities in the Featured cluster.

  • GenericFeaturedEntity: GenericFeaturedEntity differs from Recommendation item in that Featured item should be used for a single top content from developers and should represent the single most important content that will be interesting and relevant to users.

    

Pre-work

Minimum API level: 19

Add the com.google.android.engage:engage-core library to your app:

dependencies {
    // Make sure you also include that repository in your project's build.gradle file.
    implementation 'com.google.android.engage:engage-core:1.5.2'
}

Summary

The design is based on an implementation of a bound service.

The data a client can publish is subject to the following limits for different cluster types:

Step 1: Provide entity data

The SDK has defined different entities to represent each item type. We support the following entities for the Health & Fitness category:

1. GenericFeaturedEntity
2. ArticleEntity
3. PersonEntity
4. EventEntity
5. EventReservationEntity

The charts below outline available attributes and requirements for each type.

GenericFeaturedEntity

ArticleEntity

PersonEntity

EventEntity

EventReservationEntity

Image specifications

Required specifications for image assets are listed in this table:

The images are required to be hosted on public CDNs so that Google can access them.

File formats

PNG, JPG, static GIF, WebP

Maximum file size

5120 KB

Additional recommendations

• Image safe area: Put your important content in the center 80% of the image.
• Use a transparent background so that the image can be properly displayed in Dark and Light theme settings.

Content Category

The content category allows apps to publish content belonging to multiple categories. This maps the content with some of the predefined categories namely:

• TYPE_EDUCATION
• TYPE_SPORTS
• TYPE_MOVIES_AND_TV_SHOWS
• TYPE_BOOKS
• TYPE_AUDIOBOOKS
• TYPE_MUSIC
• TYPE_DIGITAL_GAMES
• TYPE_TRAVEL_AND_LOCAL
• TYPE_HOME_AND_AUTO
• TYPE_BUSINESS
• TYPE_NEWS
• TYPE_FOOD_AND_DRINK
• TYPE_SHOPPING
• TYPE_HEALTH_AND_FITENESS
• TYPE_MEDICAL
• TYPE_PARENTING
• TYPE_DATING

The images are required to be hosted on public CDNs so that Google can access them.

Guidelines to use the content categories

1. Some entities like ArticleEntity and GenericFeaturedEntity are eligible to use any of the content categories. For other entities like EventEntity, EventReservationEntity, PersonEntity, only a subset of these categories are eligible. Check the list of categories eligible for an entity type before populating the list.

2. Use the specific entity type for some content categories over a combination of the Generic entities and the ContentCategory:

   • TYPE_MOVIES_AND_TV_SHOWS - Check out the entities from Watch integration guide before using the generic entities.
   • TYPE_BOOKS - Check out the EbookEntity before using the generic entities.
   • TYPE_AUDIOBOOKS - Check out AudiobookEntity before using the generic entities.
   • TYPE_SHOPPING - Check out ShoppingEntity before using the generic entities.
   • TYPE_FOOD_AND_DRINK - Check out entities from Food Integration guide before using the generic entities.

3. The ContentCategory field is optional and should be left blank if the content doesn't belong to any of the categories mentioned earlier.

4. In case multiple content categories are provided, provide them in the order of relevance to the content with the most relevant content category placed first in the list.

Step 2: Provide Cluster data

It is recommended to have the content publish job executed in the background (for example, using WorkManager) and scheduled on a regular basis or on an event basis (for example, every time the user opens the app or when the user just added something to their cart).

AppEngagePublishClient is responsible for publishing clusters.

There are following APIs to publish clusters in the client:

• isServiceAvailable
• publishRecommendationClusters
• publishFeaturedCluster
• publishContinuationCluster
• publishUserAccountManagementRequest
• updatePublishStatus
• deleteRecommendationsClusters
• deleteFeaturedCluster
• deleteContinuationCluster
• deleteUserManagementCluster
• deleteClusters

isServiceAvailable

This API is used to check if the service is available for integration and whether the content can be presented on the device.

client.isServiceAvailable.addOnCompleteListener { task ->
    if (task.isSuccessful) {
        // Handle IPC call success
        if(task.result) {
          // Service is available on the device, proceed with content publish
          // calls.
        } else {
          // Service is not available, no further action is needed.
        }
    } else {
      // The IPC call itself fails, proceed with error handling logic here,
      // such as retry.
    }
}

client.isServiceAvailable().addOnCompleteListener(task - > {
    if (task.isSuccessful()) {
        // Handle success
        if(task.getResult()) {
          // Service is available on the device, proceed with content publish
          // calls.
        } else {
          // Service is not available, no further action is needed.
        }
    } else {
      // The IPC call itself fails, proceed with error handling logic here,
      // such as retry.
    }
});

publishRecommendationClusters

This API is used to publish a list of RecommendationCluster objects.

client.publishRecommendationClusters(
      PublishRecommendationClustersRequest.Builder()
        .addRecommendationCluster(
          RecommendationCluster.Builder()
            .addEntity(entity1)
            .addEntity(entity2)
            .setTitle("Top Picks For You")
            .build()
        )
        .build()
    )

client.publishRecommendationClusters(
            new PublishRecommendationClustersRequest.Builder()
                .addRecommendationCluster(
                    new RecommendationCluster.Builder()
                        .addEntity(entity1)
                        .addEntity(entity2)
                        .setTitle("Top Picks For You")
                        .build())
                .build());

When the service receives the request, the following actions take place within one transaction:

• Existing RecommendationCluster data from the developer partner is removed.
• Data from the request is parsed and stored in the updated Recommendation Cluster.

In case of an error, the entire request is rejected and the existing state is maintained.

publishFeaturedCluster

This API is used to publish a list of FeaturedCluster objects.

client.publishFeaturedCluster(
    PublishFeaturedClusterRequest.Builder()
      .setFeaturedCluster(
        FeaturedCluster.Builder()
          .addEntity(entity1)
          .addEntity(entity2)
          .build())
      .build())

client.publishFeaturedCluster(
            new PublishFeaturedClustersRequest.Builder()
                .addFeaturedCluster(
                    new FeaturedCluster.Builder()
                        .addEntity(entity1)
                        .addEntity(entity2)
                        .build())
                .build());

When the service receives the request, the following actions take place within one transaction:

• Existing FeaturedCluster data from the developer partner is removed.
• Data from the request is parsed and stored in the updated Featured Cluster.

In case of an error, the entire request is rejected and the existing state is maintained.

publishContinuationCluster

This API is used to publish a ContinuationCluster object.

client.publishContinuationCluster(
    PublishContinuationClusterRequest.Builder()
      .setContinuationCluster(
        ContinuationCluster.Builder()
          .addEntity(entity1)
          .addEntity(entity2)
          .build())
      .build())

client.publishContinuationCluster(
            new PublishContinuationClusterRequest.Builder()
                .setContinuationCluster(
                    new ContinuationCluster.Builder()
                        .addEntity(entity1)
                        .addEntity(entity2)
                        .build())
                .build());

When the service receives the request, the following actions take place within one transaction:

• Existing ContinuationCluster data from the developer partner is removed.
• Data from the request is parsed and stored in the updated Continuation Cluster.

In case of an error, the entire request is rejected and the existing state is maintained.

publishUserAccountManagementRequest

This API is used to publish a Sign In card . The signin action directs users to the app's sign in page so that the app can publish content (or provide more personalized content)

The following metadata is part of the Sign In Card -

var SIGN_IN_CARD_ENTITY =
      SignInCardEntity.Builder()
          .addPosterImage(
              Image.Builder()
                  .setImageUri(Uri.parse("http://www.x.com/image.png"))
                  .setImageHeightInPixel(500)
                  .setImageWidthInPixel(500)
                  .build())
          .setActionText("Sign In")
          .setActionUri(Uri.parse("http://xx.com/signin"))
          .build()

client.publishUserAccountManagementRequest(
            PublishUserAccountManagementRequest.Builder()
                .setSignInCardEntity(SIGN_IN_CARD_ENTITY)
                .build());

SignInCardEntity SIGN_IN_CARD_ENTITY =
      new SignInCardEntity.Builder()
          .addPosterImage(
              new Image.Builder()
                  .setImageUri(Uri.parse("http://www.x.com/image.png"))
                  .setImageHeightInPixel(500)
                  .setImageWidthInPixel(500)
                  .build())
          .setActionText("Sign In")
          .setActionUri(Uri.parse("http://xx.com/signin"))
          .build();

client.publishUserAccountManagementRequest(
            new PublishUserAccountManagementRequest.Builder()
                .setSignInCardEntity(SIGN_IN_CARD_ENTITY)
                .build());

When the service receives the request, the following actions take place within one transaction:

• Existing UserAccountManagementCluster data from the developer partner is removed.
• Data from the request is parsed and stored in the updated UserAccountManagementCluster Cluster.

In case of an error, the entire request is rejected and the existing state is maintained.

updatePublishStatus

If for any internal business reason, none of the clusters is published, we strongly recommend updating the publish status using the updatePublishStatus API. This is important because :

• Providing the status in all scenarios, even when the content is published (STATUS == PUBLISHED), is critical to populate dashboards that use this explicit status to convey the health and other metrics of your integration.
• If no content is published but the integration status isn't broken (STATUS == NOT_PUBLISHED), Google can avoid triggering alerts in the app health dashboards. It confirms that content is not published due to an expected situation from the provider's standpoint.
• It helps developers provide insights into when the data is published versus not.
• Google may use the status codes to nudge the user to do certain actions in the app so they can see the app content or overcome it.

The list of eligible publish status codes are :

// Content is published
AppEngagePublishStatusCode.PUBLISHED,

// Content is not published as user is not signed in
AppEngagePublishStatusCode.NOT_PUBLISHED_REQUIRES_SIGN_IN,

// Content is not published as user is not subscribed
AppEngagePublishStatusCode.NOT_PUBLISHED_REQUIRES_SUBSCRIPTION,

// Content is not published as user location is ineligible
AppEngagePublishStatusCode.NOT_PUBLISHED_INELIGIBLE_LOCATION,

// Content is not published as there is no eligible content
AppEngagePublishStatusCode.NOT_PUBLISHED_NO_ELIGIBLE_CONTENT,

// Content is not published as the feature is disabled by the client
// Available in v1.3.1
AppEngagePublishStatusCode.NOT_PUBLISHED_FEATURE_DISABLED_BY_CLIENT,

// Content is not published as the feature due to a client error
// Available in v1.3.1
AppEngagePublishStatusCode.NOT_PUBLISHED_CLIENT_ERROR,

// Content is not published as the feature due to a service error
// Available in v1.3.1
AppEngagePublishStatusCode.NOT_PUBLISHED_SERVICE_ERROR,

// Content is not published due to some other reason
// Reach out to engage-developers@ before using this enum.
AppEngagePublishStatusCode.NOT_PUBLISHED_OTHER

If the content is not published due to a user not logged in, Google would recommend publishing the Sign In Card. If for any reason providers are not able to publish the Sign In Card then we recommend calling the updatePublishStatus API with the status code NOT_PUBLISHED_REQUIRES_SIGN_IN

client.updatePublishStatus(
   PublishStatusRequest.Builder()
     .setStatusCode(AppEngagePublishStatusCode.NOT_PUBLISHED_REQUIRES_SIGN_IN)
     .build())

client.updatePublishStatus(
    new PublishStatusRequest.Builder()
        .setStatusCode(AppEngagePublishStatusCode.NOT_PUBLISHED_REQUIRES_SIGN_IN)
        .build());

deleteRecommendationClusters

This API is used to delete the content of Recommendation Clusters.

client.deleteRecommendationClusters()

client.deleteRecommendationClusters();

When the service receives the request, it removes the existing data from the Recommendation Clusters. In case of an error, the entire request is rejected and the existing state is maintained.

deleteFeaturedCluster

This API is used to delete the content of Featured Cluster.

client.deleteFeaturedCluster()

client.deleteFeaturedCluster();

When the service receives the request, it removes the existing data from the Featured Cluster. In case of an error, the entire request is rejected and the existing state is maintained.

deleteContinuationCluster

This API is used to delete the content of Continuation Cluster.

client.deleteContinuationCluster()

client.deleteContinuationCluster();

When the service receives the request, it removes the existing data from the Continuation Cluster. In case of an error, the entire request is rejected and the existing state is maintained.

deleteUserManagementCluster

This API is used to delete the content of UserAccountManagement Cluster.

client.deleteUserManagementCluster()

client.deleteUserManagementCluster();

When the service receives the request, it removes the existing data from the UserAccountManagement Cluster. In case of an error, the entire request is rejected and the existing state is maintained.

deleteClusters

This API is used to delete the content of a given cluster type.

client.deleteClusters(
    DeleteClustersRequest.Builder()
      .addClusterType(ClusterType.TYPE_CONTINUATION)
      .addClusterType(ClusterType.TYPE_FEATURED)
      .addClusterType(ClusterType.TYPE_RECOMMENDATION)
      .build())

client.deleteClusters(
            new DeleteClustersRequest.Builder()
                .addClusterType(ClusterType.TYPE_CONTINUATION)
                .addClusterType(ClusterType.TYPE_FEATURED)
                .addClusterType(ClusterType.TYPE_RECOMMENDATION)
                .build());

When the service receives the request, it removes the existing data from all clusters matching the specified cluster types. Clients can choose to pass one or many cluster types. In case of an error, the entire request is rejected and the existing state is maintained.

Error handling

It is highly recommended to listen to the task result from the publish APIs such that a follow-up action can be taken to recover and resubmit an successful task.

client.publishRecommendationClusters(
        PublishRecommendationClustersRequest.Builder()
          .addRecommendationCluster(..)
          .build())
      .addOnCompleteListener { task ->
        if (task.isSuccessful) {
          // do something
        } else {
          val exception = task.exception
          if (exception is AppEngageException) {
            @AppEngageErrorCode val errorCode = exception.errorCode
            if (errorCode == AppEngageErrorCode.SERVICE_NOT_FOUND) {
              // do something
            }
          }
        }
      }

client.publishRecommendationClusters(
              new PublishRecommendationClustersRequest.Builder()
                  .addRecommendationCluster(...)
                  .build())
          .addOnCompleteListener(
              task -> {
                if (task.isSuccessful()) {
                  // do something
                } else {
                  Exception exception = task.getException();
                  if (exception instanceof AppEngageException) {
                    @AppEngageErrorCode
                    int errorCode = ((AppEngageException) exception).getErrorCode();
                    if (errorCode == AppEngageErrorCode.SERVICE_NOT_FOUND) {
                      // do something
                    }
                  }
                }
              });

The error is returned as an AppEngageException with the cause included as an error code.

Step 3: Handle broadcast intents

In addition to making publish content API calls through a job, it is also required to set up a BroadcastReceiver to receive the request for a content publish.

The goal of broadcast intents is mainly for app reactivation and forcing data sync. Broadcast intents are not designed to be sent very frequently. It is only triggered when the Engage Service determines the content might be stale (for example, a week old). That way, there is more confidence that the user can have a fresh content experience, even if the application has not been executed for a long period of time.

The BroadcastReceiver must be set up in the following two ways:

• Dynamically register an instance of the BroadcastReceiver class using Context.registerReceiver(). This enables communication from applications that are still live in memory.

class AppEngageBroadcastReceiver : BroadcastReceiver(){
  // Trigger recommendation cluster publish when PUBLISH_RECOMMENDATION broadcast
  // is received
  // Trigger featured cluster publish when PUBLISH_FEATURED broadcast is received
  // Trigger continuation cluster publish when PUBLISH_CONTINUATION broadcast is
  // received
}

fun registerBroadcastReceivers(context: Context){
  var  context = context
  context = context.applicationContext

// Register Recommendation Cluster Publish Intent
  context.registerReceiver(AppEngageBroadcastReceiver(),
                           IntentFilter(Intents.ACTION_PUBLISH_RECOMMENDATION))

// Register Featured Cluster Publish Intent
  context.registerReceiver(AppEngageBroadcastReceiver(),
                           IntentFilter(Intents.ACTION_PUBLISH_FEATURED))

// Register Continuation Cluster Publish Intent
  context.registerReceiver(AppEngageBroadcastReceiver(),
                           IntentFilter(Intents.ACTION_PUBLISH_CONTINUATION))
}

class AppEngageBroadcastReceiver extends BroadcastReceiver {
// Trigger recommendation cluster publish when PUBLISH_RECOMMENDATION broadcast
// is received

// Trigger featured cluster publish when PUBLISH_FEATURED broadcast is received

// Trigger continuation cluster publish when PUBLISH_CONTINUATION broadcast is
// received
}

public static void registerBroadcastReceivers(Context context) {

context = context.getApplicationContext();

// Register Recommendation Cluster Publish Intent
context.registerReceiver(new AppEngageBroadcastReceiver(),
new IntentFilter(com.google.android.engage.service.Intents.ACTION_PUBLISH_RECOMMENDATION));

// Register Featured Cluster Publish Intent
context.registerReceiver(new AppEngageBroadcastReceiver(),
new IntentFilter(com.google.android.engage.service.Intents.ACTION_PUBLISH_FEATURED));

// Register Continuation Cluster Publish Intent
context.registerReceiver(new AppEngageBroadcastReceiver(),
new IntentFilter(com.google.android.engage.service.Intents.ACTION_PUBLISH_CONTINUATION));

}

• Statically declare an implementation with the <receiver> tag in your AndroidManifest.xml file. This allows the application to receive broadcast intents when it is not running, and also allows the application to publish the content.

<application>
   <receiver
      android:name=".AppEngageBroadcastReceiver"
      android:exported="true"
      android:enabled="true">
      <intent-filter>
         <action android:name="com.google.android.engage.action.PUBLISH_RECOMMENDATION" />
      </intent-filter>
      <intent-filter>
         <action android:name="com.google.android.engage.action.PUBLISH_FEATURED" />
      </intent-filter>
      <intent-filter>
         <action android:name="com.google.android.engage.action.PUBLISH_CONTINUATION" />
      </intent-filter>
   </receiver>
</application>

The following intents is sent by the service:

• com.google.android.engage.action.PUBLISH_RECOMMENDATION It is recommended to start a publishRecommendationClusters call when receiving this intent.
• com.google.android.engage.action.PUBLISH_FEATURED It is recommended to start a publishFeaturedCluster call when receiving this intent.
• com.google.android.engage.action.PUBLISH_CONTINUATION It is recommended to start a publishContinuationCluster call when receiving this intent.

Integration workflow

For a step-by-step guide on verifying your integration after it is complete, see Engage developer integration workflow.

FAQs

See Engage SDK Frequently Asked Questions for FAQs.

Contact

Contact engage-developers@google.com if there are any questions during the integration process.

Next steps

After completing this integration, your next steps are as follows:

• Send an email to engage-developers@google.com and attach your integrated APK that is ready for testing by Google.
• Google performs a verification and reviews internally to make sure the integration works as expected. If changes are needed, Google contacts you with any necessary details.
• When testing is complete and no changes are needed, Google contacts you to notify you that you can start publishing the updated and integrated APK to the Play Store.
• After Google has confirmed that your updated APK has been published to the Play Store, your Recommendation, Featured, and Continuation clusters may be published and visible to users.