Allow packageName and applicationId to be different

[aruke]

What feature would you like to see?

Not sure if this is the correct repository to report this, but it's Android-related, so I'll go ahead.

There wasn't much difference between Android's packageName and applicationId a long time ago.
Now packageName, aka namespace, can be configured independently of the applicationId.

Configure the app module | Android Developers

But, Firebase still treats packageName and applicationId as the same.

Add Firebase to your Android project | Firebase Documentation

How would you use it?

I love to have the ability to change the package name/namespace without any troubles with Firebase SDK.

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[argzdev]

Thanks for filing this, @aruke. I'll see if I can notify our documentations team about this.

[xmany]

Thanks for filing this, @aruke. I'll see if I can notify our documentations team about this.

@aruke

Hi guys, are there any updates? I am currently struggling with this issue.

I have 3 firebase projects and a single code base. I am trying to build 3 different Android build files, and each build should match one firebase project.
Ideally, I want to change the applicationId to identify different Android apps and leave the package_name unchanged. Then I can use applicationId to create 3 different firebase configuration files google_services.json, and then 3 Android apps would work with the matching firebase project.

Now after experimenting with this approach, the app won't open properly.. only a white screen, not sure what's wrong.

[argzdev]

Thanks for reporting, @xmany. This is still along the roadmap. Please do leave a thumbs up emoji on the original post, so that we can prioritize this base on demand. FWIW, I think this is also somewhat similar to what you want to achieve.

That said, let me consult with some engineers to get some insights regarding this.

[praveengitsit]

I had an existing Firebase project and a corresponding Flutter project. Since this is an old app, somehow the older credentials for Firebase project could not be found. We tried creating a new Firebase project for this, where we have different packageName and applicationId, and the notifications just don't seem to work anymore. Hoping to see a fix on this as soon as possible