[firebase_auth]: Crash due to no browser present on Android device

[jellynoone]

Is there an existing issue for this?

• I have searched the existing issues.

Which plugins are affected?

Auth

Which platforms are affected?

Android

Description

When trying to perform oAuth on a device without a browser, the app crashes.

Reproducing the issue

1. Run the provided code sample
2. Uninstall or disable all browsers on your device (On Samsung, externally downloaded apps can only be uninstalled while only preinstalled apps can be disabled.)
3. Press on Hello, World!
4. Observe app crashing

name: firebase_auth_bug
description: "A new Flutter project."
publish_to: 'none'
version: 0.1.0

environment:
  sdk: ^3.7.2

dependencies:
  flutter:
    sdk: flutter

  firebase_auth: ^5.5.2
  firebase_core: ^3.13.0

dev_dependencies:
  flutter_test:
    sdk: flutter
  flutter_lints: ^5.0.0

flutter:
  uses-material-design: true

{
    "emulators": {
        "auth": {
            "host": "0.0.0.0"
        }
    }
}

import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';

late FirebaseAuth _auth;
const host = 'your host comes here';
const port = 9099;

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  final app = await Firebase.initializeApp(
    options: FirebaseOptions(
      apiKey: 'non-empty',
      appId: '1:1:android:1',
      messagingSenderId: '',
      projectId: 'demo-project',
    ),
  );
  _auth = FirebaseAuth.instanceFor(app: app);
  _auth.useAuthEmulator(host, port);

  runApp(const MainApp());
}

class MainApp extends StatefulWidget {
  const MainApp({super.key});

  @override
  State<MainApp> createState() => _MainAppState();
}

class _MainAppState extends State<MainApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: TextButton(
            child: Text('Hello World!'),
            onPressed: () => _auth.signInWithProvider(GoogleAuthProvider()),
          ),
        ),
      ),
    );
  }
}

// android/app/build.gradle.kts
// ...
android {
    defaultConfig {
        // ...
        minSdk = 23
        // ...
    }
}

Firebase Core version

3.13.0

Flutter Version

3.29.2

Relevant Log Output

Crash

/AndroidRuntime(21540): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=http://192.168.1.100:9099/... flg=0x50000000 (has extras) }
E/AndroidRuntime(21540): 	at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:2252)
E/AndroidRuntime(21540): 	at android.app.Instrumentation.execStartActivity(Instrumentation.java:1878)
E/AndroidRuntime(21540): 	at android.app.Activity.startActivityForResult(Activity.java:5760)
E/AndroidRuntime(21540): 	at androidx.activity.ComponentActivity.startActivityForResult(ComponentActivity.java:780)
E/AndroidRuntime(21540): 	at android.app.Activity.startActivityForResult(Activity.java:5718)
E/AndroidRuntime(21540): 	at androidx.activity.ComponentActivity.startActivityForResult(ComponentActivity.java:761)
E/AndroidRuntime(21540): 	at android.app.Activity.startActivity(Activity.java:6216)
E/AndroidRuntime(21540): 	at android.app.Activity.startActivity(Activity.java:6183)
E/AndroidRuntime(21540): 	at com.google.firebase.auth.internal.GenericIdpActivity.zza(com.google.firebase:firebase-auth@@23.2.0:107)
E/AndroidRuntime(21540): 	at com.google.firebase.auth.internal.zzbg.onComplete(Unknown Source:4)
E/AndroidRuntime(21540): 	at com.google.android.gms.tasks.zzi.run(com.google.android.gms:play-services-tasks@@18.1.0:1)
E/AndroidRuntime(21540): 	at android.os.Handler.handleCallback(Handler.java:958)
E/AndroidRuntime(21540): 	at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(21540): 	at android.os.Looper.loopOnce(Looper.java:230)
E/AndroidRuntime(21540): 	at android.os.Looper.loop(Looper.java:319)
E/AndroidRuntime(21540): 	at android.app.ActivityThread.main(ActivityThread.java:8919)
E/AndroidRuntime(21540): 	at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(21540): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:578)
E/AndroidRuntime(21540): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)

Additional context and comments

This is most likely a duplicate of an old stale issue #5768

In my case I stumbled on this issue because I disabled my browsers, however, according to this comment on StackOverflow it seems it is possible that a crash like this can happen even if there is a viable browser installed but the device doesn't have a default set.

This was only tested on Android, I don't know if other platforms are similarly affected.

[SelaseKay]

Hi @jellynoone, thanks for the report. Based on the logs, this looks like it may be an issue with the underlying native SDK. I recommend you file a ticket here.