Engage SDK Food: 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 food content, using the Engage SDK to populate both this new surface area and existing Google surfaces.

Integration detail

Terminology

This integration includes the following five cluster types: Recommendation, Featured, Food Shopping Cart, Food Shopping List, and Reorder.

• Recommendation clusters show personalized food-related suggestions from an individual developer partner. These recommendations can be personalized to the user or generalized (for example, new on sale). Use them to surface recipes, stores, dishes, groceries, and so on as you see fit.

  • A Recommendation cluster can be made of ProductEntity, StoreEntity, or RecipeEntity listings, but not a mix of different entity types.

• The Featured cluster showcases the chosen hero ProductEntity, StoreEntity, or RecipeEntity from many developer partners in one UI grouping. There is a single Feature cluster, which is surfaced near the top of the UI, with a priority placement above all Recommendation clusters. Each developer partner is allowed to broadcast a single entity of a supported type in Featured, with many entities (potentially of different types) from multiple app developers in the Featured cluster.

• The Food Shopping Cart cluster shows a sneak peek of grocery shopping carts from multiple developer partners in one UI grouping, prompting users to complete their outstanding carts. There is a single Food Shopping Cart cluster.

  • Food Shopping Cart Cluster must show the total count of items in the cart and may also include images for X items in the user's cart.

• The Food Shopping List cluster shows a sneak peek of the grocery shopping lists from multiple developer partners in one UI grouping, prompting users to return to the corresponding app to update and complete their lists. There is a single Food Shopping List cluster.

• The Reorder cluster shows a sneak peek of the previous orders from multiple developer partners in one UI grouping, prompting users to reorder. There is a single Reorder cluster.

  • Reorder cluster must show the total count of items in the user's previous order and must also include one of the following:

    • Images for X items in the user's previous order.
    • Labels for X items in the user's previous order.

Pre-work

Minimum API level: 19

Add the com.google.android.play:engage 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:1.3.1'
}

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 Food category:

1. ProductEntity
2. StoreEntity
3. RecipeEntity
4. FoodShoppingCart
5. FoodShoppingList
6. FoodReorderCluster

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

ProductEntity

The ProductEntity object represents an individual item (such as a grocery item, dish from a restaurant, or a promotion) that developer partners want to publish.

StoreEntity

The StoreEntity object represents an individual store that developer partners want to publish, such as a restaurant or a grocery store.

RecipeEntity

The RecipeEntity object represents a recipe item that developer partners want to publish.

FoodShoppingCart

FoodShoppingList

FoodReorderCluster

Image specifications

Required specifications for image assets are listed below:

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.

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).

AppEngageFoodClient is responsible for publishing food clusters.

There are following APIs to publish clusters in the client:

• isServiceAvailable
• publishRecommendationClusters
• publishFeaturedCluster
• publishFoodShoppingCart
• publishFoodShoppingList
• publishReorderCluster
• publishUserAccountManagementRequest
• updatePublishStatus
• deleteRecommendationsClusters
• deleteFeaturedCluster
• deleteFoodShoppingCartCluster
• deleteFoodShoppingListCluster
• deleteReorderCluster
• 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 RecommendationCluster objects.

A RecommendationCluster object can have the following attributes:

client.publishRecommendationClusters(
            PublishRecommendationClustersRequest.Builder()
                .addRecommendationCluster(
                    RecommendationCluster.Builder()
                        .addEntity(entity1)
                        .addEntity(entity2)
                        .setTitle("Big savings on Thanksgiving menu")
                        .build())
                .build())

client.publishRecommendationClusters(
            new PublishRecommendationClustersRequest.Builder()
                .addRecommendationCluster(
                    new RecommendationCluster.Builder()
                        .addEntity(entity1)
                        .addEntity(entity2)
                        .setTitle("Big savings on Thanksgiving menu")
                        .build())
                .build());

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

• All existing Recommendation Cluster data is removed.
• Data from the request is parsed and stored in new Recommendation Clusters.

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

publishFeaturedCluster

This API is used to publish a FeaturedCluster object.

client.publishFeaturedCluster(
            PublishFeaturedClusterRequest.Builder()
                .setFeaturedCluster(
                    FeaturedCluster.Builder()
                        ...
                        .build())
                .build())

client.publishFeaturedCluster(
            new PublishFeaturedClusterRequest.Builder()
                .setFeaturedCluster(
                    new FeaturedCluster.Builder()
                        ...
                        .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.

publishFoodShoppingCart

This API is used to publish a FoodShoppingCart object.

client.publishFoodShoppingCart(
            PublishFoodShoppingCartClusterRequest.Builder()
                .setShoppingCart(
                    FoodShoppingCart.Builder()
                        ...
                        .build())
                .build())

client.publishFoodShoppingCart(
            new PublishFoodShoppingCartClusterRequest.Builder()
                .setShoppingCart(
                    new FoodShoppingCart.Builder()
                        ...
                        .build())
                .build());

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

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

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

publishFoodShoppingList

This API is used to publish a FoodShoppingList object.

client.publishFoodShoppingList(
            PublishFoodShoppingListRequest.Builder()
                .setFoodShoppingList(
                    FoodShoppingListEntity.Builder()
                        ...
                        .build())
                .build())

client.publishFoodShoppingList(
            new PublishFoodShoppingListRequest.Builder()
                .setFoodShoppingList(
                    new FoodShoppingListEntity.Builder()
                        ...
                        .build())
                .build());

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

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

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

publishReorderCluster

This API is used to publish a FoodReorderCluster object.

client.publishReorderCluster(
            PublishReorderClusterRequest.Builder()
                .setReorderCluster(
                    FoodReorderCluster.Builder()
                        ...
                        .build())
                .build())

client.publishReorderCluster(
            new PublishReorderClusterRequest.Builder()
                .setReorderCluster(
                    new FoodReorderCluster.Builder()
                        ...
                        .build())
                .build());

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

• Existing FoodReorderCluster data from the developer partner is removed.
• Data from the request is parsed and stored in the updated Reorder 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 vs 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.

deleteFoodShoppingCartCluster

This API is used to delete the content of Food Shopping Cart Cluster.

client.deleteFoodShoppingCartCluster()

client.deleteFoodShoppingCartCluster();

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

deleteFoodShoppingListCluster

This API is used to delete the content of Food Shopping List Cluster.

client.deleteFoodShoppingListCluster()

client.deleteFoodShoppingListCluster();

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

deleteReorderCluster

This API is used to delete the content of FoodReorderCluster.

client.deleteReorderCluster()

client.deleteReorderCluster();

When the service receives the request, it removes the existing data from the Reorder 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_FEATURED)
      .addClusterType(ClusterType.TYPE_RECOMMENDATION)
      ...
      .build())

client.deleteClusters(
            new DeleteClustersRequest.Builder()
                .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(
              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 extends BroadcastReceiver {
// Trigger recommendation cluster publish when PUBLISH_RECOMMENDATION broadcast
// is received

// Trigger featured cluster publish when PUBLISH_FEATURED broadcast is received

// Trigger shopping cart cluster publish when PUBLISH_FOOD_SHOPPING_CART
// broadcast is received

// Trigger shopping list cluster publish when PUBLISH_FOOD_SHOPPING_LIST
// broadcast is received

// Trigger reorder cluster publish when PUBLISH_REORDER_CLUSTER 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 Shopping Cart Cluster Publish Intent
context.registerReceiver(new AppEngageBroadcastReceiver(),
new IntentFilter(com.google.android.engage.food.service.Intents.ACTION_PUBLISH_FOOD_SHOPPING_CART));

// Register Shopping List Cluster Publish Intent
context.registerReceiver(new AppEngageBroadcastReceiver(),
new IntentFilter(com.google.android.engage.food.service.Intents.ACTION_PUBLISH_FOOD_SHOPPING_LIST));

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

}

• 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.food.PUBLISH_FOOD_SHOPPING_CART" />
      </intent-filter>
      <intent-filter>
         <action android:name="com.google.android.engage.action.food.PUBLISH_FOOD_SHOPPING_LIST" />
      </intent-filter>
      <intent-filter>
         <action android:name="com.google.android.engage.action.food.PUBLISH_REORDER_CLUSTER" />
      </intent-filter>
   </receiver>
</application>

The following intents will be 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.food.PUBLISH_FOOD_SHOPPING_CART It is recommended to start a publishFoodShoppingCart call when receiving this intent.
• com.google.android.engage.action.food.PUBLISH_FOOD_SHOPPING_LIST It is recommended to start a publishFoodShoppingList call when receiving this intent.
• com.google.android.engage.action.food.PUBLISH_REORDER_CLUSTER It is recommended to start a publishReorderCluster 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

Please contact engage-developers@google.com if there are any questions during the integration process. Our team will reply as soon as possible.

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 will perform a verification and review internally to make sure the integration works as expected. If changes are needed, Google will contact you with any necessary details.
• When testing is complete and no changes are needed, Google will contact 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, Shopping Cart, Shopping List, and Reorder clusters will be published and visible to users.