Start building your Android app with the Android Platform APIs. They are available in
Kotlin
and
Java
.
Note:
Many Kotlin reference topics are derived from Java-based source code.
This means that some Kotlin reference topics might contain Java code snippets.
These additional libraries make it easy to add additional functionality and features to your app.
Jetpack
- AndroidX
- Refactored versions of the Android APIs that are not bundled with the
operating system.
Reference
User Guide
- Jetpack Compose
- Jetpack Compose is a modern toolkit for building native Android UI.
Jetpack Compose simplifies and accelerates UI development on Android with
less code, powerful tools, and intuitive Kotlin APIs.
Reference
User Guide
- AndroidX Constraint Layout
- Includes
ConstraintLayout
and related APIs for
building constraint-based layouts.
Reference
User Guide
- For
ConstraintLayout
in Compose.
Reference
- Databinding Library
- Includes APIs to help you write declarative layouts and minimize the glue
code necessary to bind your application logic and layouts.
Reference
User Guide
Device Libraries
- Android Automotive Library
- Provides APIs for building Android Automotive apps.
Reference
User Guide
Other Libraries
- Material Components
- Material Components for Android
(MDC-Android)
help developers
execute Material Design to build beautiful and functional Android
apps.
Reference
User Guide
- Android NDK
- The Android NDK is a toolset that lets you implement parts of your app in native code, using
languages such as C and C++.
Reference
User Guide
- Android Game Development Kit libraries
- The Android Game Development Kit C/C++ game libraries make it easier to build,
debug, optimize, and maintain your games.
Overview
- Android Gradle Plugin
- The Android Gradle Plugin (AGP) is the supported build system for Android applications and
includes support for compiling many different types of sources and linking them together into an
application that you can run on a physical Android device or an emulator.
Reference
User Guide
Cross device SDK
The Cross device SDK simplifies the development of rich and engaging multi-device experiences.
Its core functionality includes device discovery and authorization, secure connections and data
transfers, and multi-device sessions.
Reference
User Guide
Google Play
- Play In-app Billing Library
- Provides APIs to help you implement Google Play's in-app
billing and subscription features.
Reference
User Guide
- Play Core Library
- Provides APIs to help you request, monitor, and manage on demand downloads
for Play Feature Delivery, Play Asset Delivery, and offers additional APIs such as in-app
updates and in-app reviews. This library is available in
Java
,
Native code
, and
Unity
.
- Play Install Referrer library
- Provides APIs to securely retrieve referral content from Google Play.
Reference
Google Assistant
- Built-in Intents
- Let users launch and control your Android app with their voice, using Google Assistant and
App Actions
.
Deprecated Libraries
These libraries are superseded by the
AndroidX
libraries
and are no longer maintened. They are still shipped in the SDK to support legacy apps. For more
information see the
androidx migration guide
.
- Android Support Library
- Provided a variety of Android feature and utility APIs
that are compatible with a wide range of platform versions.
The
original library
is superseded by the
AndroidX
libraries.
- Android Test Support Library
- Includes APIs for testing your Android app, including
Espresso, JUnit Runner, JUnit4 rules, and UI Automator.
The
original library
is superseded by the
AndroidX Test
library.
- Architecture Components
- Includes APIs for a variety of core app components, such as
APIs that manage your UI component lifecycle,
data persistence, view model, and more.
The
original library
is superseded by the
AndroidX
libraries.
- Constraint Layout Library
- Legacy Support Library
ConstraintLayout
and related APIs
for building constraint-based layouts.
The
original library
is superseded by the
AndroidX constraintlayout
library.
- Android Things Library
- Provided APIs to build connected devices running the Android Things platform.
The
original library
is no longer
maintained.
Android Wearable Library
Provides APIs to build apps for wearable devices running Wear OS by Google.
The
original library
is superseded
by the
AndroidX Wear
libraries.