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Firebase Setup for Push Notifications (Android)

The push notification error you're seeing:

Default FirebaseApp is not initialized in this process com.yazinai.micapp.
Make sure to call FirebaseApp.initializeApp(Context) first.

This happens because Android push notifications require Firebase Cloud Messaging (FCM) configuration.

Steps to Fix

1. Create/Access Firebase Project

  1. Go to Firebase Console
  2. Create a new project or select an existing one
  3. Click "Add app" → Android
  4. Enter package name: com.yazinsai.micapp
  5. Download google-services.json

2. Add google-services.json to Project

# Place the downloaded file at the project root
mv ~/Downloads/google-services.json /Users/rock/projects/mic-app/

3. Update app.json

Add the googleServicesFile configuration to the Android section:

{
  "expo": {
    "android": {
      "googleServicesFile": "./google-services.json",
      ...
    }
  }
}

4. Upload FCM Service Account Key to EAS

  1. In Firebase Console → Project settings → Service accounts
  2. Click "Generate New Private Key"
  3. Run: eas credentials -p android
  4. Select: Google Service Account → Upload JSON

5. Rebuild the App

⚠️ Important: OTA updates won't fix this. You need a new native build:

# For preview/testing
eas build -p android --profile preview

# For production
eas build -p android --profile production

After the build completes, install the new APK/AAB on your device.

Why OTA Updates Don't Work

The google-services.json file is processed at build time and compiled into the native Android app. It configures Firebase at the native level, which can't be changed via JavaScript/OTA updates.