WillPopScope does not work when changing FlutterActivity to FlutterFragmentActivity in the MainActivity.kt (because of local_auth plugin)

[Abdullah-Rashed]

Is there an existing issue for this?

• I have searched the existing issues
• I have read the guide to filing a bug

Steps to reproduce

1- setup local_auth pub package as the instructions say.
2- change the class from FlutterActivity in MainActivity,kt to FlutterFragmentActivity
3- Wrap any widget with WillPopScope and test the back swipe gesture

Expected results

intercept back button on android

Actual results

WillPopScope widget does not work and does not intercept back button.

Code sample

Code sample

package com.example.myApp

import io.flutter.embedding.android.FlutterActivity
import io.flutter.embedding.android.FlutterFragmentActivity

class MainActivity: FlutterFragmentActivity() {
}
import 'dart:developer';
import 'package:abee/screens/auth/login/login_screen.dart';
import 'package:abee/screens/auth/register/register_screen.dart';
import 'package:easy_localization/easy_localization.dart';
import 'package:flutter/material.dart';
import 'package:gap/gap.dart';
import '../../../helpers/local/responsive/responsive.dart';
import '../../../helpers/local/theme/app_theme.dart';
import '../../../view_models/app_cubit/app_cubit.dart';

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

  @override
  State<LoginOrSignUpScreen> createState() => _LoginOrSignUpScreenState();
}

class _LoginOrSignUpScreenState extends State<LoginOrSignUpScreen>
    with SingleTickerProviderStateMixin {
  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: () async {
        log("I was pressed");
        return false;
      },
      child: DefaultTabController(
        length: 2,
        child: WillPopScope(
          onWillPop: () async => false,
          child: Scaffold(
            appBar: AppBar(
              automaticallyImplyLeading: false,
              backgroundColor: AppCubit.get(context).getColorBasedOnTheme(
                context: context,
                lightModeColor: Theme.of(context).scaffoldBackgroundColor,
                darkModeColor: Colors.black,
              ),
              toolbarHeight: Responsive.getHeight(context) > 800 ? 30 : 0,
              bottom: TabBar(
                indicatorColor: AppTheme.mainAppColor,
                tabs: [
                  Tab(
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: [
                        const Icon(
                          Icons.login_outlined,
                          color: AppTheme.mainAppColor,
                        ),
                        const Gap(12),
                        Text(
                          "Login".tr(),
                          style: const TextStyle(
                            color: AppTheme.mainAppColor,
                          ),
                        ),
                      ],
                    ),
                  ),
                  Tab(
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: [
                        const Icon(
                          Icons.person_add_alt_1_outlined,
                          color: AppTheme.mainAppColor,
                        ),
                        const Gap(12),
                        Text(
                          "Register".tr(),
                          style: const TextStyle(
                            color: AppTheme.mainAppColor,
                          ),
                        ),
                      ],
                    ),
                  ),
                ],
              ),
            ),
            body: const TabBarView(
              children: [
                LoginScreen(),
                RegisterScreen(),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

Screenshots or Video

Screenshots / Video demonstration

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Logs

Logs

asd

Flutter Doctor output

Doctor output

[√] Flutter (Channel stable, 3.10.0, on Microsoft Windows [Version 10.0.19045.2965], locale en-US)
[√] Windows Version (Installed version of Windows is version 10 or higher)
[√] Android toolchain - develop for Android devices (Android SDK version 33.0.2)
[√] Chrome - develop for the web
[X] Visual Studio - develop for Windows
    X Visual Studio not installed; this is necessary for Windows development.
      Download at https://visualstudio.microsoft.com/downloads/.
      Please install the "Desktop development with C++" workload, including all of its default components
[√] Android Studio (version 2022.2)
[√] VS Code (version 1.79.0)
[√] Connected device (4 available)
[√] Network resources

[dam-ease]

Thanks for filing this issue @Abdullah-Rashed. I'm unable to reproduce this issue. Kindly confirm you are using the latest version of the local_auth package. local_auth: ^2.1.6
Also try to reproduce this with a new flutter project on the latest flutter version to confirm this issue still persists.

[Abdullah-Rashed]

Thanks for filing this issue @Abdullah-Rashed. I'm unable to reproduce this issue. Kindly confirm you are using the latest version of the local_auth package. local_auth: ^2.1.6 Also try to reproduce this with a new flutter project on the latest flutter version to confirm this issue still persists.

I fixed it.. maybe?
I am using the latest version of local_auth.
I tried re-creating the issue on different devices running different versions of android.

Android 10, 11 and 12 worked fine

Android 13 was giving me so many issues, though.
I was facing more issues as not only WillPopScope() won't work, but the back button causes the app to close completely. Does not matter what the navigation stack was, it will close the app regardless.

as I said, I think I fixed it.
Since it was only happening in android 13, I figured it had something to do with the android:enableOnBackInvokedCallback="true/false" in the android manifest XML file. I set it previously to true because of something I don't exactly remember, and resetting it back to false seems to have, hopefully, fix it for now.

[dam-ease]

Thanks for confirming this @Abdullah-Rashed.

[github-actions]

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