Android Developers Docs Reference com.android.billingclient.util Classes BillingHelper Helper methods for billing client. Classes BillingHelper Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated April 17, 2018.