OONI Probe is free and open source software designed to measure internet censorship and other forms of network interference.

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Other supported platforms: iOS, Desktop, CLI

This application requires Android Studio. We use Gradle and, as part of the initial gradle sync, Android studio will download all the required dependencies.

The most important dependency is oonimkall. This dependency contains the network measurement engine. Its sources are at ooni/probe-cli.

When using Gradle from the command line, you will need to set the ANDROID_SDK_ROOT environment variable to point to the directory in which you have installed the Android SDK.

We use the classic debug and release build types. We also implement the following flavours:

• stable, dev, and experimental (dimension: testing);

• full and fdroid (dimension: license).

• ooni and dw (dimension: brand).

The testing dimension controls whether we're building a release or a more unstable version. We build releases using the stable flavour. The dev flavour builds the version of the app that should be released on the store as the beta channel. The experimental flavour, instead, allows a developer to build a one-off version of the app that uses a custom build of the oonimkall library.

The license dimension controls which proprietary libraries to include into the build. The full flavour includes all such dependencies, while the fdroid flavour does not include any of them.

The brand dimension controls the branding of the application. The ooni flavour is the default branding, while the dw flavour is for the "News Media Scan" branding.

The variant names are therefore:

• ooniExperimentalFullDebug
• ooniExperimentalFullRelease
• ooniDevFullDebug
• ooniDevFullRelease
• ooniStableFullDebug
• ooniStableFullRelease
• dwExperimentalFullDebug
• dwExperimentalFullRelease
• dwDevFullDebug
• dwDevFullRelease
• dwStableFullDebug
• dwStableFullRelease

We additionally have ooniStableFdroidDebug, ooniStableFdroidRelease, dwStableFdroidDebug and dwStableFdroidRelease.

All of this is controlled by app/build.gradle.

• app contains the mobile app;
• engine contains wrappers for oonimkall, the measurement engine library;
• engine-experimental allows us to implement the experimental build flavour where you put the oonimkall.aar file you built inside engine-experimental rather than downloading it from Maven Central.

Ensure you have Android Studio and Android SDK installed. Build the ooniDevFullRelease variant using Android Studio or this command line:

./gradlew assembleOoniDevFullRelease

Instead to build the app to stay compliant to F-Droid use fdroid, which contains small tweaks required to have the app accepted by f-droid.

./gradlew assembleOoniDevFullRelease

Run unit tests/

./gradlew testOoniStableFullDebug

Run instrumented tests

Note: To also run the automation tests (to generate screenshots), set the Build Config flag RUN_AUTOMATION as true.

./gradlew connectedOoniStableFullDebugAndroidTest

Generate code coverage report (after all unit and instrumented tests successfully passed)

./gradlew jacocoAndroidTestReport

To manage translations check out our translation repo and follow the instructions there.

• Write some code

• Open a pull request

• Have fun!