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

Graphics introduction and implementation rewritten

The Graphics introduction and implementation instructions have been revised in entirety.

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DRM page rewritten

The description of the Android DRM framework has been completely rewritten and expanded.

Performance tuning property removed

The ro.hwui.fbo_cache_size property has been removed from Android and the corresponding Performance tuning list.

Compatibility Test Suite manual revised

The Compatibility Test Suite (CTS) manual has been revised with additional details regarding location settings and more.

Known issues refined

The list of Known Issues has been updated and split into categories.

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.

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.