easy_screenutil 0.0.1 easy_screenutil: ^0.0.1 copied to clipboard
A flutter plugin for adapting screen and font size.Let your UI display a reasonable layout on different screen sizes!
import 'package:flutter/material.dart';
import 'package:easy_screenutil/easy_screenutil.dart';
void main() {
ScreenUtil.ensureInitialized(designWidth: 375);
runApp(const MyApp());
}
class MyApp extends StatefulWidget {
const MyApp({super.key});
@override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
@override
void initState() {
super.initState();
}
@override
Widget build(BuildContext context) {
return const MaterialApp(
home: MyHomePage(title: 'Flutter Demo Home Page'),
builder: ScreenUtil.builder,
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
// This widget is the home page of your application. It is stateful, meaning
// that it has a State object (defined below) that contains fields that affect
// how it looks.
// This class is the configuration for the state. It holds the values (in this
// case the title) provided by the parent (in this case the App widget) and
// used by the build method of the State. Fields in a Widget subclass are
// always marked "final".
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
// This call to setState tells the Flutter framework that something has
// changed in this State, which causes it to rerun the build method below
// so that the display can reflect the updated values. If we changed
// _counter without calling setState(), then the build method would not be
// called again, and so nothing would appear to happen.
_counter++;
});
}
@override
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text(widget.title),
),
body: Center(
// Center is a layout widget. It takes a single child and positions it
// in the middle of the parent.
child: Column(
// Column is also a layout widget. It takes a list of children and
// arranges them vertically. By default, it sizes itself to fit its
// children horizontally, and tries to be as tall as its parent.
//
// Invoke "debug painting" (press "p" in the console, choose the
// "Toggle Debug Paint" action from the Flutter Inspector in Android
// Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
// to see the wireframe for each widget.
//
// Column has various properties to control how it sizes itself and
// how it positions its children. Here we use mainAxisAlignment to
// center the children vertically; the main axis here is the vertical
// axis because Columns are vertical (the cross axis would be
// horizontal).
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
const SizedBox(height: 10),
Row(
children: [
Expanded(
child: Container(
height: 50,
alignment: Alignment.center,
color: Colors.yellow,
child: const Text('1/3屏宽'),
),
),
// GestureDetector(
// onTap: () {
// print('Tapped!');
// ScaffoldMessenger.of(context).showSnackBar(
// SnackBar(
// content: Text('Tapped!'),
// ),
// );
// },
// child: Container(
// width: 10,
// height: 50,
// color: Colors.black,
// ),
// ),
Expanded(
child: Container(
height: 50,
alignment: Alignment.center,
color: Colors.green,
child: const Text('1/3屏宽'),
),
),
Expanded(
child: Container(
height: 50,
alignment: Alignment.center,
color: Colors.blue,
child: const Text('1/3屏宽'),
),
)
],
),
Container(
height: 50,
width: 375,
alignment: Alignment.centerLeft,
color: Colors.pink,
padding: EdgeInsets.only(left: 125),
child: const Text('125宽度'),
),
Container(
height: 50,
width: 375,
alignment: Alignment.center,
color: Colors.orange,
child: const Text('375宽度'),
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: const Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}