Transform API is a part of the Android Gradle Plugin and provides hooks to manipulate the compiled class during the build time before classes are given for Dexing.
It simplifies injecting custom class manipulation without having to deal with Gradle tasks and offers more flexibility on what is manipulated. Some of the projects using the Transform API are ProGuard, MultiDex and RetroLambda. People who are attending the talk will learn how the Android Gradle Plugin works and how they can use the Transform API to manipulate java class files.