SchedulerBinding

readme.md

Flutter scheduling an event to be run after BuildContext

Created with <3 with dartpad.dev.

main.dart

import 'package:flutter/material.dart';
import "package:flutter/scheduler.dart";

const Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(
        scaffoldBackgroundColor: darkBlue,
      ),
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
        floatingActionButton: FloatingActionButton(
          child: const Icon(Icons.star),
          onPressed: () {
            // This schedules an action to run at a later time
            SchedulerBinding.instance.addPostFrameCallback((timeStamp) {
              print("Hello");
              ScaffoldMessenger.of(context).showSnackBar(
                const SnackBar(
                  content: Text("Clicked"),
                ),
              );
            });
          },
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Text(
      'Hello, World!',
      style: Theme.of(context).textTheme.headlineMedium,
    );
  }
}