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.

What's New

UICC Carrier Privileges

Carriers now have a mechanism to grant special privileges for APIs relevant to the Universal Integrated Circuit Card (UICC) owner’s apps. This mechanism provides a secure and flexible way to manage apps from the Mobile Network Operator (MNO).

Audio MIDI Updates

Audio MIDI replaces former Tegra examples with generic changelists. And Kernel Configuration now contains the setting for USB host mode MIDI.

Repo Version 1.22 Checksum

The SHA-1 checksum for Repo 1.22 has been posted to enable verification and use of the latest version of the tool.

Build Numbers for Nexus Devices

New build tags and branches have been published for Nexus 4, Nexus 5, Nexus 6, Nexus 7 (flo/deb), Nexus 9 (volantis/volantisg), Nexus 10, and Nexus Player.

Power Reorganization and Additions

The previously singular Power page has been reorganized into a Power section that has gained example values for camera.avg and camera.flashlight.

AddressSanitizer and Native Debugging Instructions

The AddressSanitizer tool for detecting memory bugs in native Android code is documented for the first time in a dedicated page. Similarly, the main Debugging page now contains instructions for debuggerd, GDB, and Valgrind.

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

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.

Help this Site

Use the Send Feedback button at the bottom of any page to request improvements to the content or identify errors. In addition, source.android.com is maintained in the Android Open Source Project. See the docs/source.android.com project log in AOSP for the complete list of changes to this site. Contribute your own updates to that same project and help maintain source.android.com.