This document describes how to make local builds of the Android bindings in this repository. Most consumers of these bindings do not need to follow this process, but will instead use pre-built bindings.
Typically, this process only needs to be run once, although periodically you may need to repeat some steps (e.g., Rust updates should be done periodically).
The easiest way to install all the dependencies (and automatically handle updates), is by using Android Studio. Once this is installed, start Android Studio and open the Glean project. If Android Studio asks you to upgrade the version of Gradle, decline.
The following dependencies can be installed in Android Studio through
Tools > SDK Manager > SDK Tools:
- Android SDK Tools (may already be selected) (check here for the version requirements)
- NDK (check here for the version requirements)
You should be set to build Glean from within Android Studio now.
JAVA_HOME to be the location of Android Studio's JDK which can be found in Android Studio's "Project Structure" menu (you may need to escape spaces in the path).
Note down the location of your SDK.
If installed through Android Studio you will find the
Android SDK Location in
Tools > SDK Manager.
ANDROID_HOME environment variable to that path.
Alternatively add the following line to the
local.properties file in the root of the Glean checkout (create the file if it does not exist):
For the Android NDK (check here for the version requirements):
- Download NDK from https://developer.android.com/ndk/downloads.
- Extract it and put it somewhere (
$HOME/.android-ndk-r25is a reasonable choice, but it doesn't matter).
- Add the following line to the
local.propertiesfile in the root of the Glean checkout (create the file if it does not exist):
Rust can be installed using
rustup, with the following commands:
curl https://sh.rustup.rs -sSf | sh rustup update
Platform specific toolchains need to be installed for Rust.
This can be done using the
rustup target command.
In order to enable building for real devices and Android emulators,
the following targets need to be installed:
rustup target add aarch64-linux-android rustup target add armv7-linux-androideabi rustup target add i686-linux-android rustup target add x86_64-linux-android
- Ensure your repository is up-to-date.
- Ensure Rust is up-to-date by running
After importing the Glean project into Android Studio it should be all set up and you can build the project using
Build > Make Project
The builds are all performed by
./gradlew and the general syntax used is
Build the whole project and run tests:
You can see a list of projects by executing
./gradlew projects and a list of tasks by executing
- Q: Android Studio complains about Python not being found when building.
- A: Make sure that the
pythonbinary is on your
PATH. On Windows, in addition to that, it might be required to add its full path to the