The app unfortunately closes on Android when using Predictive Back or the hardware back button

[Jasco07122021]

The app unfortunately closes on Android when using Predictive Back or the hardware back button

• Flutter 3.24.2
• auto_route 9.2.2

I have 5 tabs and I use AutoTabsScaffold to manage them. Whenever I tap on the second or other tab, the hardware back button takes me back to the first tab. But, after pressing the back button, the app exits. Need fix!

This issue started after I upgraded my Flutter version to 3.24

[cdobrovolny]

having the same issue.

[AlexDochioiu]

Same issue here

[cdobrovolny]

a valid workaround is to downgrade the Flutter-Sdk to 3.22.0

[xVemu]

Current workaround is to pass custom onNavigationNotification in MaterialApp.router constructor.

MaterialApp.router(
  onNavigationNotification: _defaultOnNavigationNotification,
);

bool _defaultOnNavigationNotification(NavigationNotification _) {
  switch (WidgetsBinding.instance.lifecycleState) {
    case null:
    case AppLifecycleState.detached:
    case AppLifecycleState.inactive:
    // Avoid updating the engine when the app isn't ready.
      return true;
    case AppLifecycleState.resumed:
    case AppLifecycleState.hidden:
    case AppLifecycleState.paused:
      SystemNavigator.setFrameworkHandlesBack(true); /// This must be `true` instead of `notification.canHandlePop`, otherwise application closes on back gesture.
      return true;
  }
}

[ddfreiling]

Seems related to flutter/flutter#156517

[GregUAs]

With Flutter 3.24.3, all versions above 8.1.3 are defective for the back gesture in Android.

[TiesPol]

Same issue here, only when using FlutterFragmentActivity

[GregUAs]

Should I pass through something else? @TiesPol

[LiamMarega]

Any solution?

[AlexDochioiu]

Any solution?

This one seems to work:
#2059 (comment)