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I created multiple firebase project in one app to separate the development and production environment, so now I have 2 different generated google-services.json. I want to be able to run/build using a specific environment by specifying buildTypes as mentioned in this article on step 3. So my app folder below will follow this article.

NOTE: Why don't I use flavor? Because I already use command arguments (--dart-define).

This is snippet of my buildTypes:

buildTypes {
    debug {
        signingConfig signingConfigs.debug
    }
    release {
        signingConfig signingConfigs.release
    }
}

I delete apply plugin: 'com.google.gms.google-services' as stated in this documentation.

This is my app folder:

Folder structure

I run my project using debug build (flutter run --debug) but I got this error:

Unhandled Exception: [core/not-initialized] Firebase has not been correctly initialized. Have you added the "google-services.json" file to the project?

I checked this documentation page on firebase flutter site, it mentioned:

await Firebase.initializeApp(
    name: 'SecondaryApp',
    options: const FirebaseOptions(
        appId: 'my_appId',
        apiKey: 'my_apiKey',
        messagingSenderId: 'my_messagingSenderId',
        projectId: 'my_projectId'
    )
);

is my choice only passing all required data via command arguments using this approach? I'm afraid it has limitations as I use other Firebase services. Any insights would be nice, thanks.

TijaniRF
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2 Answers2

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Your google-services.json file is under the incorrect folder. It should be in android/app. Not android/app/src/debug. You can follow this official document.

Once your Android app has been registered, download the configuration file from the Firebase Console (the file is called google-services.json). Add this file into the android/app directory within your Flutter project.

Akif
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  • I have 2 google-services.json files for different environments, I think I can't put it in same folder. But let's say I edit one google-services.json filename, how can I use specific google-services.json based on my buildType? – TijaniRF Nov 03 '20 at 16:54
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    Ok, you can follow this instruction: https://stackoverflow.com/a/34364376/10659482 – Akif Nov 03 '20 at 17:21
  • Wow thanks for the nice thread, I'll test several approaches that suit my use case. – TijaniRF Nov 03 '20 at 19:14
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I found a simple way, this works for me:

  1. Add this code in your android/app build.gradle:

    buildTypes {
    release {
        shrinkResources true
        minifyEnabled true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        signingConfig signingConfigs.release
        debuggable false
        copy {
            from 'src/main'
            include 'google-services.json'
            into '.'
        }
    }

    debug {
        applicationIdSuffix ".debug" //Change this according to your requirement
        debuggable true
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        copy {
            from 'src/debug'
            include 'google-services.json'
            into '.'
        }
    }
}

  2. Next, add the google-services.json like this:

Add them inside android/app/src and then respective folders.

  1. Finally, run the app in debug or release mode to automatically update
Cynthia Konar
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