Welcome to the Android Open Source Project!

Android is an open-source software stack for a wide range of mobile devices and a corresponding open-source project led by Google. Here you can find the information and source code you need to learn more about the Android platform. From there you can create custom variants of the Android software stack, port devices and accessories to the Android platform, and ensure your devices are compatible with the Android compatibility definition.

What's New

Disk size requirements increased

The amount of free disk space listed as required on Downloading and Building has been increased significantly.

Supported devices and version strings updated

The list of supported devices, branch tags and version strings for Android 5.0 have been updated.

JDK instructions updated for Mac

A new Installing the JDK section has been developed to describe Java installation for Mac OS.

New CTS media files available for download

Find CTS media files version 1.1 for Android 5.0 media stress tests on Compatibility Downloads.

Android Partner Marketing offers brand guidance

The Android Partner Marketing team now offers an easy-to-use Partner Brand Inquiry Form for answers to branding questions and review of marketing materials.

Getting Started

Explore the Source

Get the complete Android platform and modify and build it to suit your needs. You can also contribute to the Android Open Source Project repository to make your changes available to everyone else in the Android ecosystem.

Android framework summary

Port Android to Devices

Port the latest Android platform and create compelling devices that your customers want.

Build Accessories

Sometimes, a device can't do it all. Tap into Android's open accessory standard and build accessories to complement the wide variety of Android-powered devices.

Get Compatible

Being Android-compatible lets you offer custom features but still give users and developers a consistent and standard experience across all Android-powered devices. Android provides guidance and a test suite to verify your Android compatibility.