App crashed after adding flutter firebase auth ui - flutter

Question

Flutter firebase auth UI have some issue, because of firebase_auth version miss match issue
My flutter app crashed and unable to identify an issue, after opening in an android studio, I got the issue and it is here
Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.mycom.mypetshop. Make sure to call FirebaseApp.initializeApp(Context) first.
at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common##16.0.2:240)
at com.google.firebase.auth.FirebaseAuth.getInstance(Unknown Source)
at io.flutter.plugins.firebaseauth.FirebaseAuthPlugin.<init>(FirebaseAuthPlugin.java:54)
at io.flutter.plugins.firebaseauth.FirebaseAuthPlugin.registerWith(FirebaseAuthPlugin.java:47)
at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:20)
at com.vyapari2online.mypetshop.MainActivity.onCreate(MainActivity.java:11)
at android.app.Activity.performCreate(Activity.java:5990)
How to solve this?
In project 'app' a resolved Google Play services library dependency
depends on another at an exact version (e.g. "[15.0. 1]", but isn't
being resolved to that version. Behavior exhibited by the library will
be unknown.
Dependency failing: com.google.android.gms:play-services-flags:15.0.1
-> com.google.android.gms:play-services-basement#[
15.0.1], but play-services-basement version was 16.0.1.
The following dependencies are project dependencies that are direct or
have transitive dependencies that lead to the art ifact with the
issue.
-- Project 'app' depends on project 'firebase_auth' which depends onto com.google.firebase:firebase-auth#16.0.2
-- Project 'app' depends on project 'firebase_core' which depends onto com.google.firebase:firebase-core#16.0.4
-- Project 'app' depends on project 'cloud_firestore' which depends onto com.google.firebase:firebase-firestore#17.1.1
-- Project 'app' depends on project 'google_sign_in' which depends onto com.google.android.gms:play-services-auth#16.0.1
For extended debugging info execute Gradle from the command line with
./gradlew --info :app:assembleDebug to see the dep endency paths to
the artifact. This error message came from the google-services Gradle
plugin, report issues at https://
github.com/google/play-services-plugins and disable by adding
"googleServices { disableVersionCheck = false }" to your b uild.gradle
file.
#flutter_firebase_ui have a lot of issues #google please hire me, I can help your developers

Answer 1

Dependency Configuration
For the gradle issue, make sure your Android SDK and Firebase/Firestore plugins are compatible versions are compatible. Here's what worked for me:
dependencies {
classpath 'com.android.tools.build:gradle:3.2.1'
classpath 'com.google.gms:google-services:4.2.0'
classpath 'com.google.firebase:firebase-auth:16.0.5'
}
In the module/app build.gradle:
android {
compileSdkVersion 27
lintOptions {
disable 'InvalidPackage'
}
defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "com.timeswap.timeswapcore"
minSdkVersion 17
targetSdkVersion 27
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
multiDexEnabled true
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
...
}
Specifically, pay attention to the compileSdkVersion, targetSdkVersion, and the version numbers of google-services and firebase_auth. Fiddling with those numbers eventually led me to this config, and it may help you find your appropriate config.
Firebase or Firestore Initialization
As for the App initialization, I have this
Firestore firestore = Firestore.instance;
firestore.settings(timestampsInSnapshotsEnabled: true);
in my _initFirestore, which is called right after super.initState()
#override
void initState() {
super.initState();
_initFirestore();
checkCurrentUser();
}
Firebase (and all other Firebase plugins that I've used) is initialized similarly, but with the firebase_core: dependency instead of cloud_firestore: in pubspec.yaml.
For instance, from the flutter/plugins/packages/firebase_storage GitHub repo:
void main() async {
final FirebaseApp app = await FirebaseApp.configure(
name: 'test',
options: FirebaseOptions(
googleAppID: Platform.isIOS
? '1:159623150305:ios:4a213ef3dbd8997b'
: '1:159623150305:android:ef48439a0cc0263d',
gcmSenderID: '159623150305',
apiKey: 'AIzaSyChk3KEG7QYrs4kQPLP1tjJNxBTbfCAdgg',
projectID: 'flutter-firebase-plugins',
),
);
final FirebaseStorage storage = FirebaseStorage(
app: app, storageBucket: 'gs://flutter-firebase-plugins.appspot.com');
runApp(MyApp(storage: storage));
}
You can also use this Medium post as a guide to get started with the flutter Firebase Auth UI.
For future reference, you can navigate to flutter/plugins/packages/{package name} on Github and find main.dart inside of examples/lib for a demo. Feel free to leverage this to solve your dependency issue as well!

Answer 2

You need to initialize the FirebaseApp before using it. You can add it to your onCreate method.
#Override
public void onCreate() {
super.onCreate();
FirebaseApp.initializeApp(this);
}
Also make sure you have the dependency in your build.gradle
dependencies {
....
}
apply plugin: 'com.google.gms.google-services'

Answer 3

I also face same issue and solved by adding Facebook app id in AndroidManifest.xml
Try run Android app with Android studio you will get the error message