Download the Android source

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Initialize the Repo client

Set up your client to access the Android source repository:

Create and navigate to a working directory:

mkdir WORKING_DIRECTORY
cd WORKING_DIRECTORY

Initialize your working directory for source control:

repo init --partial-clone -b main -u https://android.googlesource.com/platform/manifest

The -b option is used to identify the branch you are initializing. If -b isn't provided, repo init defaults to the main branch. For a list of branches and tag names, see Source code tags and builds .

The -u option is required and is used to specify a manifest file, which is an XML file specifying where the various Git projects in the Android source are placed within your working directory. In this example, the name of the manifest file isn't specified, so the command uses the default manifest file ( default.xml ).

The output should contain the message:

repo has been initialized in path_to_working_directory

For information on manifest file format, see repo Manifest Format .

For a list of all Repo commands, see the Repo command reference .

Run the following command to download the Android source tree to your working directory:

$ repo sync -c -j8
The -c argument instructs Repo to fetch the current manifest branch from
the server. The -j8 command splits the sync across threads for faster
completion.
This operation should take a little over an hour.
If you run into any problems during download, refer to
Troubleshoot and fix sync issues.
Download proprietary binaries
AOSP can run on Cuttlefish emulators directly, but AOSP can't be used on hardware without additional device-specific proprietary libraries. Here's how to obtain those device binaries:
If you're downloading the main branch and building for a Nexus or Pixel
device, download the latest binaries from the
Binaries preview site.
If you're downloading and building the main branch and building for your
own device, you must provide your device-specific binaries.
If you're downloading and building a tagged, non-main, branch and building
for a Nexus or Pixel device, download the device-specific binary from
Binaries for Nexus and Pixel devices.
Extract proprietary binaries
Each set of binaries comes as a self-extracting script in a compressed
archive. To extract and place these binaries in the correct location of your
source tree:
Extract the archive.
Run the included self-extracting shell script from the root of your AOSP
source tree.
Agree to the terms of the enclosed license agreement. The binaries and their
matching makefiles are installed in the vendor/ hierarchy of the source tree.
(optional) Verify code legitimacy
If you're concerned about the legitimacy of the source code, such as whether it
came from Google, you can verify the git tags for the branch. To verify Git tags:
Copy and paste the following key block into a text file, such as
keyfile.asc.
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.2.2 (GNU/Linux)
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EXzeoxcdoafxqf6gZlJZlACgkWF7wi2YLW3Oa+jv2QSTlrx4KLM=
=Wi5D
-----END PGP PUBLIC KEY BLOCK-----
Run the following command to input a public key into your GnuPG
key database. The key is used to sign annotated tags that represent releases.
$ gpg --import keyfile.asc
After importing the keys, you can verify any tag by running this command:
$ git tag -v TAG_NAME
  Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
  Last updated 2025-02-05 UTC.
      [[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-02-05 UTC."],[],[]]