Flutter 中 Firebase 的应用程序检查不起作用

Question

I'm trying to use App Check from Firebase with Flutter (on Android only for now), but the documentation is just terrible and I don't understand the errors I get when I try to access a Firebase service with an App Check token.

I run my app on my personal Android device through the terminal using the following command: flutter run --no-sound-null-safety .

I want to access data on Firebase Storage with that app. I have enforced App Check on that feature, I have also enabled SafetyNet for my app and I have created a debug token entitled "tests" that I don't even know how to use.

Here is the error I get:

Here is my main() function:

import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_app_check/firebase_app_check.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  await FirebaseAppCheck.instance.activate();

  // ... not related code

  runApp(MyWidget())
}

Here is my build.gradle in /android/app/ :

// ...

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.google.firebase:firebase-appcheck-safetynet:16.0.0-beta03'
}

Here is my MainActivity.kt in /android/app/src/main/kotlin/com/example/my_app/ :

// the package

import io.flutter.embedding.android.FlutterActivity
import android.os.Bundle
import com.google.firebase.FirebaseApp
import com.google.firebase.appcheck.FirebaseAppCheck
import com.google.firebase.appcheck.safetynet.SafetyNetAppCheckProviderFactory

class MainActivity: FlutterActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        FirebaseApp.initializeApp(/*context=*/ this);
        val firebaseAppCheck = FirebaseAppCheck.getInstance()
        firebaseAppCheck.installAppCheckProviderFactory(SafetyNetAppCheckProviderFactory.getInstance())
        super.onCreate(savedInstanceState)
    }
}

Please help me guys, nothing works now.

Answer 1

FirebaseApp.initializeApp(/ context= / this); You have there semicolon, it's kotlin code, in kotlin we don't use semicolon.