Android Developers Docs Reference android.support.test.jank Annotations GfxMonitor Annotation used to configure a gfx monitor. JankTest Annotation used to configure a jank test method. Classes JankTestBase Base test class for measuring Jank. Annotations GfxMonitor JankTest Classes JankTestBase Content and code samples on this page are subject to the licenses described in the Content License. Java is a registered trademark of Oracle and/or its affiliates. Last updated April 17, 2018.