bare workflow+expo-notifications error on android

[appflow]

Please provide the following:

1. SDK Version: 48
2. Platforms(Android/iOS/web/all): Android, bare workflow. No problems on the iOS side of things
3. Add the appropriate “Tag” based on what Expo library you have a question on.

I can’t get notifications to work on Android. I’ve followed all the info in the docs, and did the steps from beginning to end twice, yet still getting the same error message :

[Error: Encountered an exception while calling native method: Exception occurred while executing exported method getDevicePushTokenAsync on module ExpoPushTokenManager: Default FirebaseApp is not initialized in this process (bundle id for this project). Make sure to call FirebaseApp.initializeApp(Context) first.]

Things I’ve checked or tried so far from tickets that had similar-but-not-the-same error message

• I have a google-services file in the root of the project, and app.config.js refers to it under android.googleServicesFile. The google-services file only has one client object
• The API key is unrestricted, and in google-services client.api_key.current_key is the same as Google Cloud API Credentials console → Android key (auto-generated by Firebase)
• When calling getExpoPushTokenAsync, I tried passing a projectId since docs specify In the bare workflow, you must provide a value which takes the shape @username/projectSlug, where username is the Expo account that the project is associated with, and projectSlug is your slug from app.json. , this didn’t fix the problem
• When googling . Make sure to call FirebaseApp.initializeApp(Context) first. I found plenty of native android tickets that mention adding lines to build.gradle files like classpath 'com.google.gms:google-services:4.3.2' but so far none of these proposed solutions worked

Is there anything specific to bare projects and expo-notifications that I should be looking into? Any clue would be greatly appreciated, thanks

Edit : I ran adb logcat to see if I can get any more info and got this : W FirebaseApp: Default FirebaseApp failed to initialize because no default options were found. This usually means that com.google.gms:google-services was not applied to your gradle project.

[appflow]

I ended up finding a fix that removed the error

In android/build.gradle, under dependencies, I added classpath('com.google.gms:google-services:4.3.15')

And under android/app/build.gradle, I added apply plugin: 'com.google.gms.google-services'

This doesn’t seem mentionned anywhere in the documentation, so leaving it here in case anyone stumbles on this in the future.