Flutter One time Intro Screen?

Question

I have an intro screen for my app, but it shows every time I open the app, I need to show that for the 1st time only.

How to do that?

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Answer 1

Use shared_preferences:

Full code:

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  var prefs = await SharedPreferences.getInstance();
  var boolKey = 'isFirstTime';
  var isFirstTime = prefs.getBool(boolKey) ?? true;

  runApp(MaterialApp(home: isFirstTime ? IntroScreen(prefs, boolKey) : RegularScreen()));
}

class IntroScreen extends StatelessWidget {
  final SharedPreferences prefs;
  final String boolKey;
  IntroScreen(this.prefs, this.boolKey);

  Widget build(BuildContext context) {
    prefs.setBool(boolKey, false); // You might want to save this on a callback.
    return Scaffold();
  }
}

class RegularScreen extends StatelessWidget {
  Widget build(BuildContext context) => Scaffold();
}