flexible 0.1.1

  • Readme
  • Changelog
  • Example
  • Installing
  • 77

flutter_flexible #

Build Status codecov

Flutter UI scalable layout scheme.

Solve problem #

Visual designers usually output only one screen design draft when we develop mobile app, we want to be able to adapt perfectly to different resolution devices.

Implementation scheme #

Scales to the width of the screen. The most suitable UI can scroll up and down.

How to use #

Import #

import 'package:flexible/flexible.dart';

example #

 ScreenFlexibleWidget(  // 1. Wrap with `ScreenFlexibleWidget`
  child: Builder(
    builder: (BuildContext context) {
      return Container(
        color: Colors.red,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
              width: flexible(context, 187.5),  // 2. All pixel value use `flexible` function , 375.0/2=187.5, 
                                                // this container is half the width of the screen on any device.
              height: flexible(context, 500.0),
              color: Colors.yellow,
              child: Center(
                child: Text(
                  style: TextStyle(
                    fontSize: flexible(context, 200.0), // Text fontSize also use `flexible`
                    color: Colors.black,
                    decoration: TextDecoration.none,

You can change design draft size , default is 375.0

    ScreenFlexible.designScreenWidth = 750.0;

0.1.0 initial version #

  • Basic function


import 'package:flexible/flexible.dart';
import 'package:flutter/material.dart';

import 'basic.dart';
import 'menu.dart';

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

class MyApp extends StatelessWidget {
  static const String _title = 'Screen Flexible Demo';

  Widget build(BuildContext context) {
    ScreenFlexible.designScreenWidth = 750.0;
    return MaterialApp(
      title: _title,
      initialRoute: '/',
      routes: {
        '/': (context) => MenuListPage(),
        '/basic': (context) => BasicLayoutPage(),

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  flexible: ^0.1.1

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:flexible/flexible.dart';
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Learn more about scoring.

We analyzed this package on Apr 1, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.7.1
  • pana: 0.13.6
  • Flutter: 1.12.13+hotfix.8

Health suggestions

Fix lib/screen_flexible_widget.dart. (-0.50 points)

Analysis of lib/screen_flexible_widget.dart reported 1 hint:

line 67 col 17: 'inheritFromWidgetOfExactType' is deprecated and shouldn't be used. Use dependOnInheritedWidgetOfExactType instead. This feature was deprecated after v1.12.1..


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0 <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.11 1.14.12
meta 1.1.8
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies
test any