Flutter Tip: Future.microTask
If you use a complicated function when setting up a page, it can make the page load slower. To prevent this, there are various methods, and one I prefer is Future.microtask. This helps speed up how the page looks and behaves.
Certainly! In Flutter, Future.microtask can be used to schedule a microtask, which is a way to run a function asynchronously and efficiently after the current event loop.
Here's a simple example:
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
String message = 'Hello';
@override
void initState() {
super.initState();
// Delaying the execution of updateMessage using Future.microtask
Future.microtask(() {
updateMessage();
});
// Simulating other complex tasks that might slow down the initialization
for (int i = 0; i < 100000000; i++) {
// Some complex calculations
}
}
void updateMessage() {
setState(() {
message = 'Delayed Hello';
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Future.microtask Example'),
),
body: Center(
child: Text(message),
),
);
}
}the updateMessage function is scheduled to run asynchronously using Future.microtask. This ensures that it will be executed after the current event loop, which can be helpful in scenarios where you want to delay a task to avoid affecting the initial rendering of the UI. The delay allows other complex tasks in the initState to complete first.
I hope this Tip was helpful to you. Thank you for taking the time to read it. Your feedback and suggestions are always welcome.
