: assert(map['apiKey'] != null, "'apiKey' cannot be null."),

i'm trying to develop an app on Android studio, with firebase tools. Despite i have a file in the lib firebase_options (created with flutterfire configure), it always give me error:

E/flutter: [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: 'package:firebase_core_platform_interface/src/firebase_options.dart': Failed assertion: line 61 pos 16: 'map['apiKey'] != null': 'apiKey' cannot be null.
    #0      _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:51:61)
    #1      _AssertionError._throwNew (dart:core-patch/errors_patch.dart:40:5)
    #2      new FirebaseOptions.fromMap (package:firebase_core_platform_interface/src/firebase_options.dart:61:16)
    #3      MethodChannelFirebase._initializeFirebaseAppFromMap (package:firebase_core_platform_interface/src/method_channel/method_channel_firebase.dart:45:23)
    #4      ListMixin.forEach (dart:collection/list.dart:86:13)
    #5      MethodChannelFirebase._initializeCore (package:firebase_core_platform_interface/src/method_channel/method_channel_firebase.dart:35:10)
    <asynchronous suspension>
    #6      MethodChannelFirebase.initializeApp (package:firebase_core_platform_interface/src/method_channel/method_channel_firebase.dart:73:7)
    <asynchronous suspension>
    #7      Firebase.initializeApp (package:firebase_core/src/firebase.dart:40:31)
    <asynchronous suspension>
    #8      main (package:my_firstapp/main.dart:13:3)
    <asynchronous suspension> 

my main.dart is :

import 'package:flutter/material.dart';
import 'package:my_firstapp/locator.dart';
import 'package:my_firstapp/models/user_model.dart';
import 'package:my_firstapp/screens/wrapper.dart';
import 'package:provider/provider.dart';
import 'package:my_firstapp/services/auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'firebase_options.dart';

void main() async {
  await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform,

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  Widget build(BuildContext context) {
    return StreamProvider<UserModel>.value(
      value: AuthService().user,
      initialData: null,
      child: MaterialApp(
        theme: ThemeData(
          primaryColor: Color(0xff5FA55A),
          secondaryHeaderColor: Color(0xff5FA55A),
        home: Wrapper(),

What can i do, i'm stuck on this problem. Please help me

1 answer

  • answered 2022-05-04 11:08 Sharon

    The API key is missing from the firebase_options file. Open the firebase_options file, check line 61 and also Ctrl+f 'apiKey' to find other mentions in the file where it's missing.

    To find the API key:

    1. The Android app Api key can be found in the google-services.json file.
    2. The ios app Api key can be found in the GoogleService-Info.plist
    3. For the web app, go to the firebase console, select project settings from the menu.

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