Hardcoded dependency

PHOTO

Sun Apr 13 2025 07:21:10 GMT+0000 (Coordinated Universal Time)

Saved by @manish23 #flutter

class UserWidget extends StatelessWidget {
  final ApiService apiService = ApiService(); // Hardcoded dependency

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<String>(
      future: apiService.fetchUserName(),
      builder: (context, snapshot) {
        if (snapshot.hasData) {
          return Text("User: ${snapshot.data}");
        }
        return CircularProgressIndicator();
      },
    );
  }
}

Save snippets that work from anywhere online with our extensions

Available in the Chrome Web Store

Get Firefox Add-on

Get VS Code extension

Comments

More like this

#dart #flutter #layouts

How to make height of all widgets inside Row equal the tallest widget

Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(title: Text('IntrinsicWidth')),
    body: Center(
      child: IntrinsicHeight(
        child: Row(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: <Widget>[
            RaisedButton(
              onPressed: () {},
              child: Text('Short'),
            ),
            RaisedButton(
              onPressed: () {},
              child: Text('A bit Longer'),
            ),
            RaisedButton(
              onPressed: () {},
              child: Text('The Longest text button'),
            ),
          ],
        ),
      ),
    ),
  );
}

#android #dart #flutter #ios #helloworld

All the code you need to run Hello World in Flutter using a Stateless widget

import 'package:flutter/material.dart';

void main() {
  runApp(
    new MaterialApp(
      title: 'Hello World App',
      home: new myApp(),
    )
  );
}

class myApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text('Hello World App'),
      ),
      body: new Center(
        child: new Text(
          'Hello, world!'
        ),
      ),
    );
  }
}

How to remove debug banner in flutter on android emulator? - Stack Overflow

MaterialApp(
 debugShowCheckedModeBanner: false
)

Flutter Layout Cheat Sheet. Do you need simple layout samples for… | by Tomek Polański | Flutter Community | Medium

Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(title: Text('IntrinsicWidth')),
    body: Center(
      child: IntrinsicWidth(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: <Widget>[
            RaisedButton(
              onPressed: () {},
              child: Text('Short'),
            ),
            RaisedButton(
              onPressed: () {},
              child: Text('A bit Longer'),
            ),
            RaisedButton(
              onPressed: () {},
              child: Text('The Longest text button'),
            ),
          ],
        ),
      ),
    ),
  );
}

Capitalize the first letter of a String

String capitalize(String s) {
  if (s == null || s.isEmpty) {
    return s;
  }
  return s.length < 1 ? s.toUpperCase() : s[0].toUpperCase() + s.substring(1);
}

#dart #flutter #howto

How to decorate text stroke in Flutter

Text("Border test",
    style: TextStyle(
      inherit: true,
      fontSize: 48.0,
      color: Colors.pink,
      shadows: [
        Shadow( // bottomLeft
          offset: Offset(-1.5, -1.5),
          color: Colors.white
        ),
        Shadow( // bottomRight
          offset: Offset(1.5, -1.5),
          color: Colors.white
        ),
        Shadow( // topRight
          offset: Offset(1.5, 1.5),
          color: Colors.white
        ),
        Shadow( // topLeft
          offset: Offset(-1.5, 1.5),
          color: Colors.white
        ),
      ]
    ),
);

#dart #flutter #layout

How to make width of all widgets inside Column equal the widest widget

Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(title: Text('IntrinsicWidth')),
    body: Center(
      child: IntrinsicWidth(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: <Widget>[
            RaisedButton(
              onPressed: () {},
              child: Text('Short'),
            ),
            RaisedButton(
              onPressed: () {},
              child: Text('A bit Longer'),
            ),
            RaisedButton(
              onPressed: () {},
              child: Text('The Longest text button'),
            ),
          ],
        ),
      ),
    ),
  );
}

Flutter Cheatsheet

https://github.com/Temidtech/Flutter-Cheat-Sheet/blob/master/README.md

check for special characters and others

hasSpecialCharacters = password.contains(new RegExp(r'[!@#$%^&*(),.?":{}|<>]')); 

  final bool isNumeric = password.contains(RegExp('[0-9]'));
  final bool isLowerCase = password.contains(RegExp("(?:[^a-z]*[a-z]){1}"));
  final bool isUpperCase = password.contains(RegExp("(?:[^A-Z]*[A-Z]){1}"));

Flutter - Container Decoration

Container(
                                child: Text(
                                  items[index].itemName,
                                  style: TextStyle(
                                      color: Colors.black, fontSize: 30),
                                  textAlign: TextAlign.center,
                                ), //Text
                                height: 40,
                                width: 400,
                                  decoration:
                               BoxDecoration(
                  border: Border.all(color: Colors.black38, width: 3),
                  borderRadius: BorderRadius.circular(20),
                  boxShadow: [
                    BoxShadow(
                      color: Colors.black.withOpacity(0.5),
                      spreadRadius: 5,
                      blurRadius: 5,
                      offset: Offset(0, 3), // changes position of shadow
                    ),
                  ],
                  color: Colors.white,
                  image: DecorationImage(
                    image: AssetImage(filterList[index].itemImg),
                    fit: BoxFit.contain,
                  ),
                ),

A small example in Flutter for having different AppBars while using BottomNavigationBar

https://gist.github.com/basselch/51b8a047c5c86355c5859a2e5f198fd0

Flutter Separated ListView Example

final List<String> entries = <String>['A', 'B', 'C'];
final List<int> colorCodes = <int>[600, 500, 100];

ListView.separated(
  padding: const EdgeInsets.all(8),
  itemCount: entries.length,
  itemBuilder: (BuildContext context, int index) {
    return Container(
      height: 50,
      color: Colors.amber[colorCodes[index]],
      child: Center(child: Text('Entry ${entries[index]}')),
    );
  },
  separatorBuilder: (BuildContext context, int index) => const Divider(),
);

flutter test screensize

void main() {
  final TestWidgetsFlutterBinding binding = TestWidgetsFlutterBinding.ensureInitialized();


  testWidgets('some test', (WidgetTester tester) async {
    await binding.setSurfaceSize(Size(640, 1136));
    print(binding.createViewConfiguration());
 ...

flutter test screensize

void main() {
  final TestWidgetsFlutterBinding binding = TestWidgetsFlutterBinding.ensureInitialized();


  testWidgets('some test', (WidgetTester tester) async {
    await binding.setSurfaceSize(Size(640, 1136));
    print(binding.createViewConfiguration());
 ...

flutter test screensize

void main() {
  final TestWidgetsFlutterBinding binding = TestWidgetsFlutterBinding.ensureInitialized();


  testWidgets('some test', (WidgetTester tester) async {
    await binding.setSurfaceSize(Size(640, 1136));
    print(binding.createViewConfiguration());
 ...

Browse more snippets >>