🐛 Flutter Build APK: Unhandled Exception: [core/not-initialized] Firebase has not been correctly initialized

[mhmzdev]

I have been facing this problem only in Release Mode in Debug mode its working fine.

I'm using firebase_core and firebase_storage plugins only

⚠ Exception

🩺 Flutter Doctor

Followed all the steps of integrating Firebase in Flutter:

Step 1:

Added in main.dart before runApp()

• WidgetsFlutterBinding.ensureInitialized();
• await Firebase.initializeApp();

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}

Step 2:

Added in build.gradle root folder

• classpath 'com.google.gms:google-services:4.2.0'

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.0'
        classpath 'com.google.gms:google-services:4.2.0' <-- // here it is
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

Step 3:

Added in build.gradle app level

• apply plugin: 'com.google.gms.google-services'

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services' <--- // here it is
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

Step 4:

• Updated the firebase_core
• Updated the firebase_storage

Step 5:

Added the google-service.json to app level

Step 5:

• flutter clean
• Re-downloaded the google-services.json

I have already gone through the solutions available on Stack Overflow. Hence, whatever link you are going to shared, I might have gone through it already.

Please let me know if you need anything else :)

[markusaksli-nc]

Hi @mhmzdev
As mentioned before please flutter upgrade to the latest stable, use the recommended version of classpath 'com.google.gms:google-services:4.3.8' and flutter clean before trying again.
Also check your app/build.gradle to make sure you aren't overriding the native SDK versions.
Thank you

[mhmzdev]

I have used com.google.gms:google-services:4.3.8 and tried flutter clean plus tried the latest version as well. Yet its not working.

I have also enabled multiDexEnabled too

[markusaksli-nc]

Could you provide your app/build.gradle?

[mhmzdev]

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}



apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('key.properties')
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}

android {
    compileSdkVersion 30

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.cui.adam"
        minSdkVersion 21
        targetSdkVersion 30
        multiDexEnabled true
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
            storePassword keystoreProperties['storePassword']
        }
   }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.release
        }
    }
}



flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.android.support:multidex:1.0.3'
}