Losing state on hot reload or otherwise triggered rebuild of entire app

[slovnicki]

This issue is quite common. We should also add it to documentation as a tip.

[slovnicki]

The solution is to move your BeamerRouterDelegate to a final variable outside build.

class MyApp extends StatelessWidget {
  final _routerDelegate = BeamerRouterDelegate(
    locationBuilder: ...
  );

  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      routeInformationParser: BeamerRouteInformationParser(),
      routerDelegate: _routerDelegate,
      ...
    );
  }
}

[lam-nv]

Hi @slovnicki

In your opinion, is it okay if I want to add more locations at runtime, like enabling some features by activating an option in the settings?

I also encountered the same issue with you, even tested with example from beamer packages.

[slovnicki]

In your opinion, is it okay if I want to add more locations at runtime, like enabling some features by activating an option in the settings?

Sorry for late response @lam-nv, haven't notice this here. Yes, I think this should be fine.

[slovnicki]

Beware that #193 (comment) will not help if you're on web and flutter >2.0.6 because of flutter/flutter#79241

[slovnicki]

Hi @oyont
Could this be because you're using flutter version >2.0.6 as pointed out in this comment above?

[oyont]

My flutter version is 2.2.0 but I'm running the app on web. It's happening on mobile too

[slovnicki]

This is in README so I'll close

[okelloEnos]

Just curious about this issue of losing state on rebuild :

1. I experienced the same issue and resolved it using the comment #193(comment) in flutter 2.5.0.
2. Then reading down the thread this comment from you to @oyont

Conclusion
Why do you suggest that this issue is experienced because @oyont is using flutter version >2.0.6 ??.... kindly can you suggest a way forward

[slovnicki]

Hi @okelloEnos
I think we can ignore that old comment about Flutter v2.0.6, but if I remember correctly, there was a time where some 2.0.X version did not lose state even when delegate was created inside build. And as I recall, this was an accidental Flutter feature which never occurred again 🙂

[tomasweigenast]

Can be this thread reopened? I've the same issue but moving BeamerDelegate to a final property does not work

[vrenan]

I'm also have this same issue

[holland-hng]

same issue :(