MATTER-Adaptation_Layer/examples/tv-app/android/App/common-api

Matter tv app common-api

The tv-app common-api module defines the interface to interact with the Matter agent service for the content apps. This module defines the AIDL interfaces, clusters and command abstractions accessible. It also defines various constants and intent field definitions that would be used by the content app while interacting with the Matter SDK. The interface provided by this module helps content app to register dynamic endpoints as well as report any attribute changes to the SDK.

Permissions needed

To utilize the Matter agent interface the partner apps need to

• Query and bind themselves to a service that handles com.matter.tv.app.api.action.MatterAppAgent action
• The host process should hold the com.matter.tv.app.api.permission.SEND_DATA permission
• To bind with the Matter app agent service, the client should hold the com.matter.tv.app.api.permission.BIND_SERVICE_PERMISSION permission

Matter app agent APIs

The Matter app agent service exposes the following interface

• setSupportedClusters
  • This API allows partners to report clusters dynamically to the Matter agent
  • This API is not incremental and on each API call we should report the full set of clusters - any clusters that are omitted in the latest API call that were added previously will be removed
  • The above behavior does not impact static clusters declared in app resources and they will not be removed
  • Dynamic cluster can be used to override and hide a static cluster based on cluster name
• reportAttributeChange
  • This API allows reporting changes to attributes by the content app
  • It takes in the cluster ID and attribute ID for which the attribute change is reported

Cluster and Attribute IDs

The common API package defines commonly used cluster IDs as well as corresponding Attribute ID's through com.matter.tv.app.api.Clusters. The common-api provides a quick way to refer to different clusters defined by the Matter spec relevant for media casting, as well as attributes and commands associated with each one.

Intents

The supported intents are defined under the com.matter.tv.app.api.MatterIntentConstants. This helper class defines the relevant intents used while interacting with the Matter app agent service. This includes the android permission strings to as well as command and attribute intent fields to be used.