AWSAnalyticsService.kt

    /**
     * Where the preferences are stored on the system
     */
    private val preferencesFile: String
        get() = "${this::class.java.simpleName}.prefs"

    /**
     * The name of the custom attribute
     */
    private val categoriesAttributeName = "categories"

    /**
     * The shared preferences area object
     */
    private var prefs: SharedPreferences = context.getSharedPreferences(preferencesFile, 0)

    init {
        // Read the current categories list, if present
        val categories = prefs.getStringSet(categoriesAttributeName, emptySet())
        if (categories.size > 0) {
            val endpoint = pinpoint.targetingClient.currentEndpoint()
            endpoint.addAttribute(categoriesAttributeName, categories.toList())
            pinpoint.targetingClient.updateEndpointProfile(endpoint)
        }

        pinpoint.sessionClient.startSession()
        pinpoint.analyticsClient.submitEvents()
    }

    /**
     * Update the categories within the endpoint profile
     */
    override fun updateCategories(categories: List<String>) {
        prefs.edit().putStringSet(categoriesAttributeName, categories.toSet()).apply()
        val endpoint = pinpoint.targetingClient.currentEndpoint()
        endpoint.addAttribute(categoriesAttributeName, categories)
        pinpoint.targetingClient.updateEndpointProfile(endpoint)
        recordEvent("_endpoint.updateCategories")
    }