Abstract computer screen and pie charts
software

Named Routes in Flutter

Heads up! This article was published over 8 months ago.

Flutter provides built-in functionality for routing in apps. You can use either pass the MaterialApp a Widget, or a named route.

There are two ways of going about named routes, you can either:

  • Use URL style routes /main or /login etc.
  • Use an arbitrary string loginscreen, mainscreen etc.

When using URL style identifiers, you must provide a default route of / or the app will crash. Personally, I don’t like this style at the moment, but in the future when Flutter web support is stable this may make more sense to me.

The issue with using strings as ID’s is that static code analysis won’t catch typos. Meaning if you have a loginscreen route but then attempt to use that route later in your app, but accidentally type lognscreen, the IDE won’t catch that.

Instead, in each of your screen widgets, I think it’s a good idea to add a static id to the class, so that you can reference it wherever you need without having to worry about getting the string correct every time.

dart

class LoginScreen extends StatefulWidget {
  static const String id = 'login_screen';

  
  _LoginScreenState createState() => _LoginScreenState();
}

When you create your named routes Map, pass the id’s as the key.

dart

routes: {
  LoginScreen.id: (context) => LoginScreen(),
},

Then whenever you want to navigate to that screen, you simply access that static id.

dart

Navigator.pushNamed(context, LoginScreen.id);

That’s it.

Previous PostThe JavaScript Event Loop
Next PostWordPress Transients