Reference User Guide Android Wearable Library Provides APIs to build apps for wearable devices running Wear OS by Google. Reference User Guide Device Libraries Android Automotive Library Provides APIs for building Android Automotive apps. Reference User Guide Databinding Library Includes APIs to help you write declarative layouts and minimize the glueĬode necessary to bind your application logic and layouts. Reference User Guide AndroidX Constraint Layout Includes ConstraintLayout and related APIs for Reference User Guide AndroidX Test Includes APIs for testing your Android app, includingĮspresso, JUnit Runner, JUnit4 rules, and UI Automator. Less code, powerful tools, and intuitive Kotlin APIs. Jetpack Compose simplifies and accelerates UI development on Android with

Jetpack Compose is a modern toolkit for building native Android UI. Jetpack AndroidX Refactored versions of the Android APIs that are not bundled with the These additional libraries make it easy to add additional functionality and features to your app. This means that some Kotlin reference topics might contain Java code snippets. Note: Many Kotlin reference topics are derived from Java-based source code. Start building your Android app with the Android Platform APIs.

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