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. This site and the Android Open Source Project (AOSP) repository offer the information and source code you need to create custom variants of the Android stack, port devices and accessories to the Android platform, and ensure your devices meet compatibility requirements.

Android 7.0 Updates Available

What's New

Android 7.1 and API level 25

The full source code for Android 7.1, the OS version running on the Pixel phones, is now available in AOSP. This release includes an increase in API levels to 25. See Codenames, Tags, and Build Numbers for specific build IDs and branch tags included in this release.

Project Log Improvements

The link to the docs/source.android.com project log in AOSP has been refined to eliminate results from merges.

Seccomp-BPF with TSYNC

Instructions for configuring Seccomp-BPF with TSYNC are now included in Kernel Configuration. Seccomp-BPF enables the creation of sandboxes to restrict the system calls a process is allowed to make, while TSYNC enables the use of Seccomp-BPF from multithreaded programs.

October Android Security Bulletin

The October 2016 Android Security Bulletin has been published along with links to associated fixes. In addition, new build numbers have been published for Nexus 5, Nexus 6, Nexus 7, Nexus 9, Nexus 5X, Nexus 6P, and Nexus Player running Android 6.0 and 7.0 to support the October Android security release.

New Android Build Numbers and CTS Downloads

Android 7.0 R.1, 6.0 R9, 5.1 R10, and 5.0 R9 Compatibility Test Suite (CTS) and CTS Verifier are available for Download. Also, new Build Numbers have been published for Android 7.0 on Nexus 6P, Nexus 5X, Nexus 9 (volantis), Nexus Player, and Pixel C and Android 6.0 on Nexus 5, Nexus 5X, Nexus 6, Nexus 6P, and Nexus 9 (volantis).

Feedback Fixes

User feedback has resulted in the addition of the g.co/ABH warning about operating system safety to the User experience section of Verifying Boot and timing of security updates to Nexus devices in Android Security Bulletins. In addition, Reading Bug Reports now contains information on event log tags, wake locks, and Bluetooth Low Energy (BLE) scans.

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 AOSP repository to make your changes available to everyone else in the Android ecosystem.

Android framework summary

Port Android to Devices

Get help porting the latest Android platform to create compelling devices for your customers. Includes documentation for HAL interfaces and details on core technologies such as Android runtime (ART) and over-the-air (OTA) updates.

Make Secure

Follow these examples and instructions to harden your Android devices against malicious attacks. Find out how the Android security program works and learn how to implement the latest features.

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.

Help this Site

Use the Site Feedback button at the bottom of any page to request content improvements or let us know about errors. To contribute your own updates to the site or to view a complete list of site changes, use the AOSP project docs/source.android.com.