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Android Jetpack

Jetpack is a collection of Android software components to make it easier for you to develop great Android apps. These components help you follow best practices, free you from writing boilerplate code, and simplify complex tasks, so you can focus on the code you care about.

Jetpack comprises the androidx.* package libraries, unbundled from the platform APIs. This means that it offers backward compatibility and is updated more frequently than the Android platform, making sure you always have access to the latest and greatest versions of the Jetpack components.

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Accelerate development

Components are individually adoptable but built to work together while taking advantage of Kotlin language features that make you more productive.

Eliminate boilerplate code

Android Jetpack manages tedious activities like background tasks, navigation, and lifecycle management, so you can focus on what makes your app great.

Build high quality, robust apps

Built around modern design practices, Android Jetpack components enable fewer crashes and less memory leaked with backwards-compatibility baked in.

Android Jetpack Components

Android Jetpack components are a collection of libraries that are individually adoptable and built to work together while taking advantage of Kotlin language features that make you more productive. Use them all or mix and match!

Foundation


Foundation components provide cross-cutting functionality like backwards compatibility, testing and Kotlin language support.

  • AppCompat

    Degrade gracefully on older versions of Android

  • Android KTX

    Write more concise, idiomatic Kotlin code

  • Multidex

    Provide support for apps with multiple DEX files

  • Test

    An Android testing framework for unit and runtime UI tests

Architecture


Architecture components help you design robust, testable and maintainable apps.

  • Data Binding

    Declaratively bind observable data to UI elements

  • Lifecycles

    Manage your activity and fragment lifecycles

  • LiveData

    Notify views when underlying database changes

  • Navigation

    Handle everything needed for in-app navigation

  • Paging

    Gradually load information on demand from your data source

  • Room

    Fluent SQLite database access

  • ViewModel

    Manage UI-related data in a lifecycle-conscious way

  • WorkManager

    Manage your Android background jobs

Behavior


Behavior components help your app integrate with standard Android services like notifications, permissions, sharing and the Assistant.

  • Download manager

    Schedule and manage large downloads

  • Media & playback

    Backwards compatible APIs for media playback and routing (including Google Cast)

  • Notifications

    Provides a backwards-compatible notification API with support for Wear and Auto

  • Permissions

    Compatibility APIs for checking and requesting app permissions

  • Preferences

    Create interactive settings screens

  • Sharing

    Provides a share action suitable for an app’s action bar

  • Slices

    Create flexible UI elements that can display app data outside the app

UI


UI components provide widgets and helpers to make your app not only easy, but delightful to use.

  • Animation & transitions

    Move widgets and transition between screens

  • Auto

    Components to help develop apps for Android Auto

  • Emoji

    Enable an up-to-date emoji font on older platforms

  • Fragment

    A basic unit of composable UI

  • Layout

    Lay out widgets using different algorithms

  • Palette

    Pull useful information out of color palettes

  • TV

    Components to help develop apps for Android TV

  • Wear OS by Google

    Components to help develop apps for Wear

Latest developer stories

Latest news and videos

"With Android Architecture Components, we're re-architecting our entire app. It's great to have a Google-endorsed, opinionated, and clean way to build an Android app that makes it easier to support configuration changes."

Drew Hannay, Staff Software Engineer, LinkedIn

"We see higher agility and turnaround in new feature development with Android Architecture Components. And our overall speed continues to get better as more developers start using it."

Vishwanath Ramarao, CTO, Hike

"We love ViewModel and LiveData! Our code became so much more concise, stable, and readable, and the code architecture was beautifully unified. Stability improved, too!"

Zheng Songyin, senior development manager, BeautyPlus

"Room made it really easy for us to create the database table and DAO so we could quickly build our product. And the emphasis on testability is critical for us."

Demian Insung Hwang, KakaoTalk Developer, KakaoTalk

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