home.dart
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import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
class HomePageScaffold extends StatelessWidget {
const HomePageScaffold({Key? key, required this.title}) : super(key: key);
void printScreenInformation() {
print('Device Size:${Size(1.sw, 1.sh)}');
print('Device pixel density:${ScreenUtil().pixelRatio}');
print('Bottom safe zone distance dp:${ScreenUtil().bottomBarHeight}dp');
print('Status bar height dp:${ScreenUtil().statusBarHeight}dp');
print('The ratio of actual width to UI design:${ScreenUtil().scaleWidth}');
print(
'The ratio of actual height to UI design:${ScreenUtil().scaleHeight}');
print('System font scaling:${ScreenUtil().textScaleFactor}');
print('0.5 times the screen width:${0.5.sw}dp');
print('0.5 times the screen height:${0.5.sh}dp');
print('Screen orientation:${ScreenUtil().orientation}');
}
@override
Widget build(BuildContext context) {
printScreenInformation();
/// Uncomment if you wanna force current widget to be rebuilt with updated values
/// Must use it if you use the second method, or if you use ScreenUtilInit's child.
/// Note: don't use it along with ScreenUtil.init()
// ScreenUtil.registerToBuild(context);
return Scaffold(
appBar: AppBar(
title: Text(title),
),
body: SingleChildScrollView(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Row(
children: <Widget>[
// Using Extensions
Container(
padding: EdgeInsets.all(10.w),
width: 0.5.sw,
height: 200.h,
color: Colors.red,
child: Text(
'My actual width: ${0.5.sw}dp \n\n'
'My actual height: ${200.h}dp',
style: TextStyle(
color: Colors.white,
fontSize: 12.sp,
),
),
),
// Without using Extensions
Container(
padding: EdgeInsets.all(ScreenUtil().setWidth(10)),
width: ScreenUtil().setWidth(180),
height: ScreenUtil().setHeight(200),
color: Colors.blue,
child: Text(
'My design draft width: 180dp\n\n'
'My design draft height: 200dp',
style: TextStyle(
color: Colors.white,
fontSize: ScreenUtil().setSp(12),
),
),
),
],
),
Container(
padding: EdgeInsets.all(10.w),
width: 100.r,
height: 100.r,
color: Colors.green,
child: Text(
'I am a square with a side length of 100',
style: TextStyle(
color: Colors.white,
fontSize: 12.sp,
),
),
),
Padding(
padding: const EdgeInsets.all(18).r,
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
TextField(
decoration: InputDecoration(
border: OutlineInputBorder(),
),
),
18.verticalSpace,
Text('Device width:${ScreenUtil().screenWidth}dp'),
Text('Device height:${ScreenUtil().screenHeight}dp'),
Text('Device pixel density:${ScreenUtil().pixelRatio}'),
Text(
'Bottom safe zone distance:${ScreenUtil().bottomBarHeight}dp'),
Text('Status bar height:${ScreenUtil().statusBarHeight}dp'),
Text(
'The ratio of actual width to UI design:${ScreenUtil().scaleWidth}'),
Text(
'The ratio of actual height to UI design:${ScreenUtil().scaleHeight}'),
10.verticalSpace,
Text(
'System font scaling factor:${ScreenUtil().textScaleFactor}'),
5.verticalSpace,
Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Text(
'16sp, will not change with the system.',
style: TextStyle(
color: Colors.black,
fontSize: 16.sp,
),
textScaleFactor: 1.0,
),
Text(
'16sp,if data is not set in MediaQuery,my font size will change with the system.',
style: TextStyle(
color: Colors.black,
fontSize: 16.sp,
),
),
],
),
],
),
),
],
),
),
floatingActionButton: FloatingActionButton.extended(
onPressed: () {
SystemChrome.setPreferredOrientations([
MediaQuery.of(context).orientation == Orientation.portrait
? DeviceOrientation.landscapeRight
: DeviceOrientation.portraitUp,
]);
// setState(() {});
},
label: const Text('Rotate'),
),
);
}
final String title;
}