Firebase Docs Reference Logger Also: Google Play services public interface Logger This interface is used to setup logging for Firebase Database. Nested Class Summary enum Logger.Level The log levels used by the Firebase Database library 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 February 15, 2017.