我想让我的应用程序对任何屏幕大小都有响应，方法是我尝试使用灵活的Mediaquery，并在容器上生成代码。我把它放在一行中
但当我在手机上试用时，它看起来很美味，而在另一部手机上，它看起来又大又坏那么，我如何让它对任何屏幕大小都有响应，ps：当我在任何scren中调试它时，它看起来很好，但当我释放它将其转换为apk并尝试将其转换到另一部手机时，它显得很糟糕，而且没有响应
import 'package:ecofun_ui/screens/details_screen.dart';
import 'package:ecofun_ui/widget/category-card.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'slide.dart';
import 'package:auto_size_text/auto_size_text.dart';
//import 'package:bubble_bottom_bar/bubble_bottom_bar.dart';
void main() {
runApp(MaterialApp(
theme: ThemeData(primarySwatch: Colors.deepOrange),
debugShowCheckedModeBanner: false,
home: SplashPage(duration: 3, goToPage: WelcomePage())));
}
//start the splash page
class SplashPage extends StatelessWidget {
int duration = 0;
Widget goToPage;
SplashPage({this.goToPage, this.duration});
@override
Widget build(BuildContext context) {
Future.delayed(Duration(seconds: this.duration), () {
Navigator.push(
context, MaterialPageRoute(builder: (context) => this.goToPage));
});
return Scaffold(
body: Container(
color: Colors.deepOrange,
alignment: Alignment.center,
child: LogoWhite()));
}
} //the end of splashpage screen
//start the welcome screen
class WelcomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Column(children: <Widget>[
Flexible(
child: FractionallySizedBox(
heightFactor: 1,
widthFactor: 1,
child: Container(
color: Colors.white,
child: LayoutBuilder(
builder: (ctx, constraints) {
return Column(children: <Widget>[
SizedBox(
height: constraints.maxHeight * 0.15,
),
Text('E c o F u n',
textAlign: TextAlign.center,
style: TextStyle(
color: Colors.blueGrey,
fontSize: 60,
fontWeight: FontWeight.w900)),
SizedBox(
height: constraints.maxHeight * 0.1,
),
Padding(
padding: EdgeInsets.all(10),
child: FlatButton(
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => HomeScreen()));
},
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(50)),
color: Colors.deepOrange,
padding: EdgeInsets.only(
top: 15, bottom: 15, left: 70, right: 70),
child: AutoSizeText(
' نادي الرقي ',
style: TextStyle(fontSize: 28, color: Colors.white),
maxLines: 1,
),
)),
Container(
margin: EdgeInsets.all(15),
child: ClipRRect(
borderRadius: BorderRadius.circular(50),
child: Material(
color: Colors.transparent,
child: InkWell(
splashColor: Colors.deepOrange.withOpacity(0.2),
highlightColor:
Colors.deepOrange.withOpacity(0.2),
onTap: () {},
child: Container(
padding: EdgeInsets.only(
right: 70, left: 70, top: 15, bottom: 15),
child: AutoSizeText(
'حساب المعدل',
style: TextStyle(
fontSize: 28, color: Colors.deepOrange),
maxLines: 1,
),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(50),
color: Colors.transparent,
border: Border.all(
color: Colors.deepOrange,
width: 3,
)),
),
)))),
Container(
height: constraints.maxHeight * 0.3,
decoration: BoxDecoration(
color: Colors.transparent,
image: DecorationImage(
image: AssetImage("images/teamspirit.gif"),
fit: BoxFit.fitWidth)),
),
Column(
children: [
Container(
height: constraints.maxHeight * 0.01,
width: constraints.maxWidth * 0.2,
decoration: BoxDecoration(
color: Colors.blue,
borderRadius: BorderRadius.circular(10),
),
),
SizedBox(
height: constraints.maxHeight * 0.02,
),
AutoSizeText(
'All right reserved for EcoClubn Devlopped by Imen Lakrib',
style: TextStyle(fontSize: 15, color: Colors.black),
maxLines: 2,
),
],
)
]);
},
),
),
),
)
]));
} //the end of welcome screen
}
class LogoWhite extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Container(
width: 400,
height: 200,
child: Image.asset(
"images/logowhite.png",
//fit: BoxFit.cover,
));
}
}
// onboarding class with widgets
class HomeScreen extends StatefulWidget {
@override
_HomeScreenState createState() => _HomeScreenState();
}
class _HomeScreenState extends State<HomeScreen> {
int _currentPage = 0;
PageController _controller = PageController();
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Scaffold(
backgroundColor: Color(0xFF3084AC),
body: Container(
margin: EdgeInsets.only(top: 500 / 100),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.only(
topLeft: Radius.circular(40), topRight: Radius.circular(40))),
child: Stack(
children: [
// Pageview
PageView.builder(
scrollDirection: Axis.horizontal,
onPageChanged: _onchanged,
controller: _controller,
itemCount: _pages.length,
itemBuilder: (context, int index) {
return _pages[index];
}),
Column(
mainAxisAlignment: MainAxisAlignment.end,
children: [
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: List<Widget>.generate(_pages.length, (int index) {
return AnimatedContainer(
duration: Duration(milliseconds: 300),
height: 6,
width: (index == _currentPage) ? 20 : 10,
margin:
EdgeInsets.symmetric(horizontal: 5, vertical: 30),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(5),
color: (index == _currentPage)
? Colors.blue
: Colors.orange),
);
}),
),
InkWell(
onTap: () {
_controller.nextPage(
duration: Duration(milliseconds: 800),
curve: Curves.easeInOutQuint);
},
child: AnimatedContainer(
alignment: Alignment.center,
duration: Duration(milliseconds: 300),
height: 44,
width: 217,
decoration: BoxDecoration(
color: Colors.blue,
borderRadius: BorderRadius.circular(15),
boxShadow: [
BoxShadow(
color: Color(0xFF263238).withOpacity(0.5),
blurRadius: 4,
spreadRadius: 1)
]),
child: (_currentPage == (_pages.length - 1))
? Text(
"Get Started",
style: TextStyle(
color: Colors.white,
fontSize: 20,
),
)
: Text(
"Next",
style: TextStyle(
color: Colors.white,
fontSize: 20,
),
)),
),
SizedBox(
height: 11,
),
SizedBox(
height: 15,
),
],
)
],
),
),
),
);
}
// generate Page View
List<Widget> _pages = [
SliderPage(
title: "من نحن",
descreption:
"أول نادي ثقافي علمي بجامعة الجزائر 3 n تم انشاءه من قبل طلبة اختلفت افكارهم n واجتمع حب المبادرة لديهم والرغبة في التغيير n وترك الاثر في الجامعة",
beginColor: Color(0xFFB6E3F3),
endColor: Color(0xFF061922),
bgscreen: "images/screen_1.png",
),
SliderPage(
title: "اهدافنا",
descreption:
"مرافقة الطالب وتشجيعه وتحفيزه لان يكون n طالبا مثقفا ملما بتخصصه او بما له صلة به ",
beginColor: Color(0xFFB469EC),
endColor: Color(0xFF3E165B),
bgscreen: "images/screen_2.png",
),
SliderPage(
title: "رؤيتنا",
descreption:
"تاهيل وتجهيز الطالب للحياة المهنية n ليكون مسلحا بالمهارات التي يطلبها سوق العمل",
beginColor: Color(0xFF79E69F),
endColor: Color(0xFF136A33),
bgscreen: "images/screen_3.png",
),
SliderPage(
title: "شعارنا",
descreption: "رسخ فكرة .. جسد عملا .. اترك اثرا",
beginColor: Color(0xFF79E69F),
endColor: Color(0xFF136A33),
bgscreen: "images/screen_5.png",
),
SliderPage(
title: "انظم لنا",
descreption:
"ان كنت طالبا تزاول دراستك حاليا n باحدى كليات جامعة الجزائر 3 n ماعليك الا مراسلتنا على مختلف صفحاتنا",
beginColor: Color(0xFF79E69F),
endColor: Color(0xFF136A33),
bgscreen: "images/screen_4.png",
)
];
_onchanged(int index) {
setState(() {
_currentPage = index;
});
}
}
//the end of onboarding class with widgets
// calcsecreen start
class CalcScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
var size = MediaQuery.of(context).size;
return Scaffold(
//bottomNavigationBar: BubbleBottomBar(),
body: Stack(
children: <Widget>[
Container(
height: size.height * 1,
decoration: BoxDecoration(
color: Colors.orange,
image: DecorationImage(
alignment: Alignment.centerLeft,
image: AssetImage("images/bgorange.png"))),
),
SafeArea(
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 20),
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
SizedBox(
height: 25,
),
Text(
'مرحبا بكم في n برنامج حساب المعدلات',
textAlign: TextAlign.center,
style: Theme.of(context)
.textTheme
.display1
.copyWith(fontWeight: FontWeight.w900),
),
SizedBox(
height: 30,
),
Expanded(
child: GridView.count(
crossAxisCount: 2,
childAspectRatio: 1,
crossAxisSpacing: 20,
mainAxisSpacing: 20,
children: <Widget>[
CategoryCard(
title: 'ماستر 1',
image: "images/M1.png",
press: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) {
return FifthYear();
}),
);
},
),
CategoryCard(
title: 'ماستر 2',
image: "images/M2.png",
press: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) {
return FordYear();
}),
);
},
),
CategoryCard(
title: '1 ليسانس',
image: "images/L1.png",
press: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) {
return SecondS1();
}),
);
},
),
CategoryCard(
title: '2 ليسانس',
image: "images/L2.png",
press: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) {
return SecondYear();
}),
);
},
),
CategoryCard(
title: '3 ليسانس',
image: "images/L3.png",
press: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) {
return ThirdYear();
}),
);
},
),
],
))
],
),
))
],
));
}
}
// calcsecreen end您可以使用flatter_screenutil包，对于响应字体，您可以像这样使用
Text(
'16sp, will not change with the system.',
style: TextStyle(
color: Colors.black,
fontSize: 16.sp, // this will make font responsive
),
),
对于响应式UI，你可以像这个一样使用
//for example:
///If you want to display a square:
///The UI may show a rectangle:
Container(
width: 375.w,
height: 375.h,
),
////If you want to display a square:
Container(
width: 300.w,
height: 300.w,
),
or
Container(
width: 300.r,
height: 300.r,
),
或者您可以使用以下代码识别设备类型
static bool isMobile(BuildContext context) =>
MediaQuery.of(context).size.width < 650;
static bool isTablet(BuildContext context) =>
MediaQuery.of(context).size.width < 1100 &&
MediaQuery.of(context).size.width >= 650;
static bool isDesktop(BuildContext context) =>
MediaQuery.of(context).size.width >= 1100;