Firebase on Unity blocking Vuforia when building for Android

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
android, csharp, firebase, unity
Domain
build-system, game-dev, mobile-dev

Research direction

Start with the linked reproduction repository and compare the vuforia-working and vuforia-not-working branches, noting the Firebase App (Core) and External Dependency Manager versions. Run a clean Android build with Unity 2022.3.43f1, install it on a device, and verify that adding Firebase no longer prevents Vuforia's live camera feed from appearing.

Written by the indexing model from the issue text.

Description

In Unity, Firebase is blocking the camera (and probably ARCore) when building for Android.

Checkout this repo:
https://gitlab.com/OfirBinoHDEG/vuforia-firebase-issue.git
In the repo there are two interesting branches vuforia-working and vuforia-not-working.
When you checkout to vuforia-working and building for Android, Vuforia should work, and you could see the camera feed when running on an Android device.
And you probably already guessed, when checking-out vuforia-not-working and building for Android, Vuforia will not work and when running you'll experience a very black screen.
If Vuforia is still working when building from vuforia-not-working, try a clean build instead of a regular build. You might be building on fumes :)
The only difference between the two branches is that on vuforia-not-working I installed Firebase App (Core) package, and on vuforia-working only External Dependency Manager for Unity is installed.
You can also download the builds from here.

Steps to reproduce:

  1. Create a Unity project. I used Unity 2022.3.43f1 with Universal 3D Core preset project.
  2. Install Vuforia from https://developer.vuforia.com. You may need to create an account in order to download. I used version 10.28.4
  3. Install External Dependency Manager for Unity. I used version 1.2.183.
  4. Install Firebase App (Core). I used version 12.5.0.
  5. Enable auto-resolution and gradleTemplate.properties in the dialogs that popup, and make sure External Dependency Manager is properly resolved.
  6. Build a clean build for Android.
  7. Install and run the build on an Android device and allow camera permissions.

Expected Results:
Vuforia should work and a live camera feed should fill the screen.

Actual Results:
Vuforia is not working, and the screen is black.

Thanks in advance 🙏

Dominant language
C#
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