Learn more about the OS that powers Android devices around the world.
Learn what's new with the Android operating system.
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Android is an open source software stack created for a wide array of devices with different form factors. Learn more about building and contributing to the platform.
Build Android
About
Learn more about Android's history and the platform's structure.
Start
Kick-start development and get your environment properly set up.
Download
Learn more about source control tools and download the complete Android OS source code.
Contribute
Submit your own contributions to the Android Open Source Project.
From the basic building blocks of an Android device to the more intricate, advanced features, learn about all the ways you can customize the Android OS.
Customize Android

Security

Android incorporates industry-leading security features to keep the Android platform and ecosystem safe. Learn more about Android's robust security model and rigorous security program.
Secure Android
About Security
The Android OS has robust security right out of the box. Learn more about each of the underlying security features built into the Android platform.
bulletins
See fixes for possible issues affecting devices running Android, including details from specific device manufacturers.
best practices
Follow best practices covering everything from organizational and operational security to user privacy and the entirety of the Android ecosystem.
features
Android offers a variety of on-device security features you can implement to build the most secure devices possible.
To provide your Android users with a coherent experience as they use your device alongside other Android devices in the ecosystem, apply these established standards to your Android implementation.
Go to Compatibility

Automotive

The Android Automotive OS (AAOS) is a base Android platform that runs a preinstalled IVI system as well as optional Android apps developed by second and third parties. See the development and testing tools you can use to build automotive apps alongside our expansive set of guidelines for app development.
Learn more
Guidelines
Learn about our extensive ecosystem of guidelines specific to the development of apps for cars.
Tools
Read about the tools we provide to support your development of AAOS-based apps.
Tools
See the scalable infrastructure and comprehensive set of testing tools we provide for you to maximize your efficiency and ensure compliance.
Releases
See details for the most recent releases of AAOS.
Android Devices
Beyond mobile devices, the Android OS serves as a platform for unified corporate networks and entertainment equipment.
Go to Android Devices
Reference
See the API reference documentation for the APIs and frameworks available for the Android OS, including HIDL, HAL, and Trade Fed.
Go to Reference