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 offers 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

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.

Key Features

Just-in-time (JIT) compiler with code profiling to Android runtime (ART) continually improves app performance and now offers Recommendations for use. Direct boot and file-based encryption allows certain apps to run securely when the device is powered on but not unlocked. Multi-window support enables simultaneous display of multiple apps on a device screen. The Vehicle HAL enables Android Automotive implementations.

Security Improvements

Android now strictly enforces verified boot and requires a same-system trusted CA store. APK signature scheme v2 performs signature checking across the entire file. Security hardening of media framework and camera service splits mediaserver into multiple processes with restricted permissions and capabilities (may require changes to HAL implementations). For more changes, see 7.0 security enhancements.

Audio, Camera, & Graphics Updates

Audio policy improvements include changes to policy configuration files, a reorganization of audio policy code, and new extensions for audio policy routing APIs. Android now supports Vulkan (low­-overhead, cross-platform API for high-performance 3D graphics) and OpenGL 3.2; check with your SoC for driver support. Enhancements to camera3 support devices with high-end cameras.

OEM Customizations

Users can now restrict calls and texts (impacts apps using blocking features). Do-not-disturb (DND) rules can now suppress visual interruptions.

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 (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.