Flutter屏幕适配插件adaptive_screen_flutter的使用
Flutter屏幕适配插件adaptive_screen_flutter的使用
1示例代码
import 'package:adaptive_screen_flutter/adaptive_screen_flutter.dart';
import 'package:flutter/material.dart';
void main() {
// 初始化自定义断点,设置web断点为1250
ScreenInit.setWebBreakPoint(1250);
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
// 这个 widget 是你应用程序的根。
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
title: 'Adaptive Screen',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const HomePage(),
);
}
}
class HomePage extends StatelessWidget {
constHomePage({Key? key}) : super(key: key);
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
body: AdaptiveScreen(
mobile: Container(
color: Colors.blue,
child: const Center(
child: Text('Ini Mobile'),
),
),
tablet: Container(
color: Colors.green,
child: const Center(
child: Text('Ini Tab'),
),
),
web: Container(
color: Colors.yellow,
child: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Text('Ini Web'),
TextButton(
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (_) > const SecondPage()),
);
},
child: const Text('To Second page')
)
],
),
),
),
),
);
}
}
class SecondPage extends StatelessWidget {
constSecondPage({Key? key}) : super(key: key);
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Second page'),
),
body: const Center(
child: Text('Second page'),
),
);
}
}
更多关于Flutter屏幕适配插件adaptive_screen_flutter的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
1 回复
更多关于Flutter屏幕适配插件adaptive_screen_flutter的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然,以下是如何在Flutter项目中使用adaptive_screen_flutter
插件来进行屏幕适配的代码示例。adaptive_screen_flutter
插件可以帮助你根据设备的屏幕尺寸和方向自动调整UI布局。
第一步:添加依赖
首先,在你的pubspec.yaml
文件中添加adaptive_screen_flutter
依赖:
dependencies:
flutter:
sdk: flutter
adaptive_screen_flutter: ^最新版本号 # 请替换为实际的最新版本号
然后运行flutter pub get
来安装依赖。
第二步:导入插件
在你的Dart文件中导入adaptive_screen_flutter
插件:
import 'package:adaptive_screen_flutter/adaptive_screen_flutter.dart';
第三步:使用插件进行屏幕适配
你可以使用插件提供的AdaptiveScreen
和ScreenUtil
类来进行屏幕适配。以下是一个简单的示例:
import 'package:flutter/material.dart';
import 'package:adaptive_screen_flutter/adaptive_screen_flutter.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return AdaptiveScreen(
builder: (context, screenUtil) {
return MaterialApp(
home: HomeScreen(screenUtil: screenUtil),
);
},
);
}
}
class HomeScreen extends StatelessWidget {
final ScreenUtil screenUtil;
HomeScreen({required this.screenUtil});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('屏幕适配示例'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'屏幕宽度: ${screenUtil.screenWidth} px',
style: TextStyle(fontSize: screenUtil.setSp(16)),
),
SizedBox(height: screenUtil.setHeight(20)),
Text(
'屏幕高度: ${screenUtil.screenHeight} px',
style: TextStyle(fontSize: screenUtil.setSp(16)),
),
SizedBox(height: screenUtil.setHeight(20)),
Container(
width: screenUtil.setWidth(300),
height: screenUtil.setHeight(200),
color: Colors.blue,
child: Center(
child: Text(
'自适应容器',
style: TextStyle(color: Colors.white, fontSize: screenUtil.setSp(24)),
),
),
),
],
),
),
);
}
}
解释
- AdaptiveScreen:这个Widget会接收一个builder函数,该函数返回你的主应用Widget,并会传递一个
ScreenUtil
实例。 - ScreenUtil:这个实例提供了多个方法来根据屏幕尺寸进行单位转换。例如:
screenUtil.screenWidth
和screenUtil.screenHeight
用于获取屏幕的宽度和高度。screenUtil.setWidth(double value)
和screenUtil.setHeight(double value)
将dp或px转换为当前屏幕的宽度或高度比例。screenUtil.setSp(double value)
将sp转换为当前屏幕的字体大小。
通过这种方式,你可以轻松地在Flutter应用中实现屏幕适配。希望这个示例对你有所帮助!