Everyone want a Responsive UI in flutter but How do you get this ??

 

1. flutter_screenutil

Flutter_screenutil is a responsive design tool for Flutter applications. It is used to create a responsive layout for different screen sizes, resolutions, and orientations. It includes features such as sizing, alignment, and scaling of text, images, and other elements. It allows developers to create apps that are optimized for specific device sizes and can be easily adapted for different devices and platforms.

Initialize and set the fit size and font size to scale according to the system's "font size" accessibility option #

Please set the size of the design draft before use, the width and height of the design draft.

The first way (You must use it once in your app)

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    //Set the fit size (Find your UI design, look at the dimensions of the device screen and fill it in,unit in dp)
    return ScreenUtilInit(
      designSize: const Size(360, 690),
      minTextAdapt: true,
      splitScreenMode: true,
      builder: (context , child) {
        return MaterialApp(
          debugShowCheckedModeBanner: false,
          title: 'First Method',
          // You can use the library anywhere in the app even in theme
          theme: ThemeData(
            primarySwatch: Colors.blue,
            textTheme: Typography.englishLike2018.apply(fontSizeFactor: 1.sp),
          ),
          home: child,
        );
      },
      child: const HomePage(title: 'First Method'),
    );
  }
}

The second way:You need a trick to support font adaptation in the textTheme of app theme
Hybrid development uses the second way
not support this:
MaterialApp(
  ...
  //To support the following, you need to use the first initialization method
  theme: ThemeData(
    textTheme: TextTheme(
      button: TextStyle(fontSize: 45.sp)
    ),
  ),
)
but you can do this:
void main() async {
  // Add this line
  await ScreenUtil.ensureScreenSize();
  runApp(MyApp());
}
...
MaterialApp(
  ...
  builder: (ctx, child) {
    ScreenUtil.init(ctx);
    return Theme(
      data: ThemeData(
        primarySwatch: Colors.blue,
        textTheme: TextTheme(bodyText2: TextStyle(fontSize: 30.sp)),
      ),
      child: HomePage(title: 'FlutterScreenUtil Demo'),
    );
  },
)

Setting font does not change with system font size
APP global:
MaterialApp(
  debugShowCheckedModeBanner: false,
  title: 'Flutter_ScreenUtil',
  theme: ThemeData(
    primarySwatch: Colors.blue,
  ),
  builder: (context, widget) {
    return MediaQuery(
      ///Setting font does not change with system font size
      data: MediaQuery.of(context).copyWith(textScaleFactor: 1.0),
      child: widget,
    );
  },
  home: HomePage(title: 'FlutterScreenUtil Demo'),
),
Specified Text:
Text("text", textScaleFactor: 1.0)
Specified Widget:
MediaQuery(
  // If there is no context available you can wrap [MediaQuery] with [Builder]
  data: MediaQuery.of(context).copyWith(textScaleFactor: 1.0),
  child: AnyWidget(),
)
widget test


Example #
example demo
To use second method run: flutter run --dart-define=method=2
Effect