A Firebase App named "[DEFAULT]" already exists
Solution 1
I had similar issue when create firebase app by flavors using flutterfire CLI. I realized that flutterfire create apps with same name in different projects. Then I tried 2 ways and it works.
1st: manually change app name in each firebase project.
2nd: add param name when initialize such as in main_dev.dart
await Firebase.initializeApp( name: "dev project", options: DefaultFirebaseOptions.currentPlatform);
Solution 2
Got this error after fumbling with firebase projects and upgrading packages.
Fixed by
flutter clean
flutter pub get
then build the project again.
I have apps with same name in different projects, this doesn't seem to cause the error.
K_Chandio
Updated on January 03, 2023Comments
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K_Chandio over 1 year
I have my flutter App integrated with firebase, everything was fine but when I migrated firebase project to client firebase console, added his google services file, changed DefaultFirebaseOption.currentplatform file credentials but I got error whenever I try to run my app. My main method looks like this:
void main() async { WidgetsFlutterBinding.ensureInitialized(); await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform); token = await FirebaseMessaging.instance.getToken(); Provider.debugCheckInvalidValueType = null; runApp(const MyApp()); }
The error is:
E/flutter (28330): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: [core/duplicate-app] A Firebase App named "[DEFAULT]" already exists.
I searched here and found a solution from here and updated my main method like this:
void main() async { WidgetsFlutterBinding.ensureInitialized(); if (Firebase.apps.isNotEmpty) { await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform); }else{ Firebase.app() } //await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform); token = await FirebaseMessaging.instance.getToken(); Provider.debugCheckInvalidValueType = null; runApp(const MyApp()); }
but this time I got no error but my app UI is not showing, I just see black screen. I have been trying to solve this from 4 to 5 hours but found no solution.any Help will highly be appreciated.
Update I provide name parameter in both of the scenrios and my app worked fine for first time i install, but when i retart or close app and re run it, I got same error as mentioned in above cases.
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luis about 2 yearsI think the condition should be different like: ``` if(Firebase.apps.isEmpty) { await Firebase.initializeApp( options: DefaultFirebaseOptions.currentPlatform, ); } ```
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Gopal Kohli almost 2 yearsit worked with adding name