#dropdownbutton

[flutterdevs]

Flutter Widget Catalog: An In-Depth Exploration of Flutter Widgets

Flutter, Google's open-source UI toolkit, has gained immense popularity among developers for its cross-platform capabilities and extensive widget library. The widget library is one of the key strengths of Flutter, offering a wide range of ready-to-use components that enable developers to create stunning and interactive user interfaces. In this blog post, we will take a deep dive into the Flutter widget catalog, exploring some of the most commonly used widgets and their functionalities.

What are Flutter Widgets? Flutter widgets are the building blocks of a Flutter application's user interface. They are reusable UI elements that can be combined and customized to create visually appealing and interactive interfaces. Widgets can be classified into two main categories: Stateless and Stateful widgets.

Stateless Widgets: Stateless widgets are immutable and do not change their appearance based on user interactions or external data. They are ideal for representing static UI components. Some commonly used stateless widgets include Text, Image, Icon, and Button.

Stateful Widgets: Stateful widgets, on the other hand, can change their appearance or behavior based on user interactions or external data. They maintain their state and update their UI whenever the state changes. Examples of stateful widgets include Checkbox, TextField, Slider, and DropdownButton.

Layout Widgets: Layout widgets in Flutter help in organizing and positioning other widgets within the user interface. They provide a way to structure the UI elements in a specific layout pattern. Some popular layout widgets include Row, Column, Stack, Container, and ListView.

Material Design Widgets: Flutter provides a set of widgets that follow the Material Design guidelines, enabling developers to create visually consistent and aesthetically pleasing UIs. These widgets include AppBar, FloatingActionButton, BottomNavigationBar, Card, and Snackbar.

Cupertino Widgets: Cupertino widgets are designed to mimic the iOS-style interface, providing a native look and feel for iOS applications developed using Flutter. They include widgets like CupertinoNavigationBar, CupertinoButton, CupertinoTextField, and CupertinoDatePicker.

Animation and Gesture Widgets: Flutter offers a rich set of animation and gesture widgets that allow developers to create engaging and interactive user experiences. Some notable widgets in this category are AnimatedContainer, Hero, GestureDetector, and DragTarget.

Custom Widgets: In addition to the built-in widgets, Flutter allows developers to create their own custom widgets tailored to their specific needs. Custom widgets provide flexibility and reusability, allowing developers to encapsulate complex UI components into a single widget.

Testing and Debugging Widgets: Flutter provides a range of widgets specifically designed for testing and debugging purposes. These widgets assist in identifying and resolving UI-related issues during development. Widgets like Semantics, TestWidgetsFlutterBinding, and MediaQuery are commonly used for testing and debugging purposes.

Conclusion: In this blog post, we have explored the Flutter widget catalog, highlighting the different types of widgets available and their functionalities. Flutter's extensive widget library empowers developers to create visually stunning and highly interactive user interfaces for their applications. Whether you are building a simple static UI or a complex custom widget, Flutter offers a wide range of tools and components to meet your needs. By leveraging the power of Flutter widgets, developers can save time and effort while delivering top-notch user experiences.

[funsayflutter]

Flutter Buttons with example

Hello, Flutter Dev’s today we will discuss Flutter Buttons with example. As everybody knows that Button is the basic and famous element in building any application. Buttons are the most useful and powerful element used in every application. Jumping from one page to another, submitting the user information, performing actions and functionality are the basic functions that button does. Here Flutter Buttons have the same functions with different types. Flutter has introduced different types of buttons with amazing UI and their specific uses.

Following are the Flutter Button types:

Flutter Flat Button:

                It is a basic level button in a Flutter. The flat word itself says that it’s a flat button without any kind of decoration. This makes it really very basic. Generally, a flat button is used in a dialog box or toolbar where it can be used with some other widgets. In addition, it has two important and required properties. One property is the child property and another is onPressed(). Where the child property shows that the flat button contains another widget or component in it. And onPressed() property lets the user know what action is processed. Talking about the decoration Flat buttons has no color and the text in it has black color. The button color can be changed as per the requirement of the application. import 'package:flutter/material.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( primarySwatch: Colors.blue, ), home: MyHomePage(title: 'Flutter Flat button Demo'), ); } } class MyHomePage extends StatefulWidget { MyHomePage({Key key, this.title}) : super(key: key); final String title; @override _MyHomePageState createState() => _MyHomePageState(); } class _MyHomePageState extends State { String _value=""; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text(widget.title), ), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: , ), ), ); } }

Flutter Raised Buttons:

                Raised Button is a material-designed button that is rich in its looks. It is nothing but the same as the Flat button but has many differences. It has an elevation that increases when the button is in action. However it is rich in looks, we can change its color, shape, behavior, the color of the button. In addition, we can change it when it is in disabled mode and the animation time for the button. The most important thing for the Raised button is that if we do not specify any callback function then the button is in a disabled state. It has following callback functions: - onPressed(): When the button is pressed the onPressed() comes in action. - onLongPress(): This function fires the event after holding the button for several seconds. In short, after a long press. 3) import 'package:flutter/cupertino.dart'; import 'package:flutter/material.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { // This widget is the root of your application. @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( primarySwatch: Colors.blue, ), home: MyHomePage(title: 'Flutter RaisedButton Demo'), ); } } class MyHomePage extends StatefulWidget { MyHomePage({Key key, this.title}) : super(key: key); final String title; @override _MyHomePageState createState() => _MyHomePageState(); } class _MyHomePageState extends State { String _value=''; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text(widget.title), ), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: , ), ), ); } }

Flutter Floating Buttons:

                Float Buttons are the circular buttons at the bottom of the screen in any application. The floating button is also famous as the Floating Action Button. This button is much popular among applications. Floating buttons contain Icons that express the behavior of the action that the button will fire. For example, the Floating button can act as a navigator like a google Maps navigation button. Another instance is the adding and subtracting button on the screen. Flutter says to have at least one Floating Action button on a single page. Following are the types of Floating Action Button: - FloatingActionButton: It is the basic Floating action button with one child widget inside it. It is a must to have the child widget. - FloatingActionButton.extended: As the name suggests that it is an extended version of the Floating Action Button. It is extended due to extra parameters like label with the child widget. In addition, this makes the Floating Action button more attractive. 3) import 'package:flutter/material.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( primarySwatch: Colors.blue, ), home: MyHomePage(title: 'Flutter Floating Button'), ); } } class MyHomePage extends StatefulWidget { MyHomePage({Key key, this.title}) : super(key: key); final String title; @override _MyHomePageState createState() => _MyHomePageState(); } class _MyHomePageState extends State { String _value=''; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text(widget.title), ), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: , ), ), floatingActionButton: FloatingActionButton( onPressed: (){ setState(() { _value = "Floating Button Clicked"; }); }, tooltip: 'Demo Floating Button', child: Icon(Icons.add), ), // floatingActionButton: FloatingActionButton.extended( // onPressed: (){ // setState(() { // _value = "Floating Extend Button Clicked"; // }); // }, label: Text('Extended'),icon: Icon(Icons.add_outlined),) ); } }

Flutter Drop Down Button:

                The dropdown button works as simple as a dropdown widget in Flutter. It creates a great visual appearance on the screen, where the user can select the element from the given dropdown. Flutter uses a material design that gives an awesome look and feel of widgets. So for dropdown, this material design for a dropdown button contains a dropdown box showing the selected item from the dropdown list and an arrow button. This arrow button will open the dropdown list on its click event. import 'package:flutter/material.dart'; void main() => runApp(MaterialApp( home: MyApp(), )); class MyApp extends StatefulWidget { @override _MyAppState createState() => _MyAppState(); } class _MyAppState extends State { List _colorItems = ; List _dropdownMenuItems; ListItem _itemSelected; void initState() { super.initState(); _dropdownMenuItems = buildDropDownMenuItems(_colorItems); _itemSelected = _dropdownMenuItems.value; } List buildDropDownMenuItems(List listItems) { List items = List(); for (ListItem listItem in listItems) { items.add( DropdownMenuItem( child: Text(listItem.name), value: listItem, ), ); } return items; } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text("Dropdown Button"), ), body: Column( children: , ), ); } } class ListItem { int value; String name; ListItem(this.value, this.name); }

Flutter Icon Button:

Icon buttons are simply the material-designed button. Which has the picture printed on them. As designed by material, so it has a cool look and feel. This button is simple like an Icon widget. But the icon is on the top of the button. That is why a user can click on it to perform an action. import 'package:flutter/material.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { // This widget is the root of your application. @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( primarySwatch: Colors.blue, ), home: MyHomePage(title: 'Flutter Icon Button'), ); } } class MyHomePage extends StatefulWidget { MyHomePage({Key key, this.title}) : super(key: key); final String title; @override _MyHomePageState createState() => _MyHomePageState(); } class _MyHomePageState extends State { int countNumber = 0; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text(widget.title), ), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: , ), ), ); } }

Flutter Inkwell Button:

                This material-designed button is specially designed for the touch response of the user. Inkwell button is generally used for adding splash ripple effect. This creates a great look and feel. Even the gesture feedback is so good. import 'package:flutter/material.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( primarySwatch: Colors.blue, ), home: MyHomePage(title: 'Flutter Inkwell Btn'), ); } } class MyHomePage extends StatefulWidget { MyHomePage({Key key, this.title}) : super(key: key); final String title; @override _MyHomePageState createState() => _MyHomePageState(); } class _MyHomePageState extends State { int _volNumber = 10; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text(widget.title), ), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: , ), ), ); } }

Flutter PopupMenu Button:

                This button is on the Menu Bar of the screen. It is also designed my material which shows the pop-up list after clicking the three dots at the corner of the menu bar. This button contains text and an image. And about behavior, the list disappears as soon as you select an option from the list. import 'package:flutter/material.dart'; void main() { runApp(MyApp());} class MyApp extends StatefulWidget { @override _MyAppState createState() => _MyAppState(); } class _MyAppState extends State { ColorList _selectedOption = options; void _select(ColorList option) { setState(() { _selectedOption = option; }); } @override Widget build(BuildContext context) { return MaterialApp( home: Scaffold( appBar: AppBar( title: const Text('Popup Menu Btn'), actions: , ), body: Padding( padding: const EdgeInsets.all(10.0), child: ColorCard(option: _selectedOption), ), ), ); } } class ColorList { const ColorList({this.code, this.value}); final int code; final String value; } const List options = const ; class ColorCard extends StatelessWidget { const ColorCard({Key key, this.option}) : super(key: key); final ColorList option; @override Widget build(BuildContext context) { return Card( child: Container( width: 400, height: 100, child:Text(option.value, style: TextStyle(fontSize: 40)), ), ); } }

Flutter Outline Button:

                The outline button is as same as the flat button of flutter. But the difference is the border that the Outline button has. The border of This button is completely dependent on the shape property of the button. It can be either a rounded rectangle, square, circle, or any other shape that is customized. import 'package:flutter/cupertino.dart'; import 'package:flutter/material.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( primarySwatch: Colors.blue, ), home: MyHomePage(title: 'Flutter Flat button Demo'), ); } } class MyHomePage extends StatefulWidget { MyHomePage({Key key, this.title}) : super(key: key); final String title; @override _MyHomePageState createState() => _MyHomePageState(); } class _MyHomePageState extends State { String _value=""; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text(widget.title), ), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: , ), ), ); } }

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[softnquebd]

Complete Flutter and Dart Roadmap 2020

Mohammad Ali Shuvo

Oct 30, 2020·4 min read

DART ROADMAP

Basics

Arrays, Maps

Classes

Play On Dart Compiler

String Interpolation

VARIABLES

var

dynamic

int

String

double

bool

runes

symbols

FINAL AND CONST

differences

const value and const variable

NUMBERS

hex

exponent

parse methods

num methods

math library

STRINGS

methods

interpolation

multi-line string

raw string

LISTS

List (Fixed and Growable)

methods

MAPS

Map (Fixed and Growable)

methods

SETS

Set ((Fixed and Growable)

methods

FUNCTIONS

Function as a variabl

optional and required parameters

fat arrow

named parameters

@required keyword

positional parameters

default parameter values

Function as first-class objects

Anonymous functions

lexical scopes

Lexical closures

OPERATORS

unary postfix expr++ expr — () [] . ?.

unary prefix -expr !expr ~expr ++expr — expr await expr

multiplicative * / % ~/

additive + -

shift << >> >>>

bitwise AND &

bitwise XOR ^

bitwise OR |

relational and type test >= > <= < as is is!

equality == !=

logical AND &&

logical OR ||

if null ??

conditional expr1 ? expr2 : expr3

cascade ..

assignment = *= /= += -= &= ^= etc.

CONTROL FLOW STATEMENTS

if and else

for loops

while and do-while

break and continue

switch and case

assert

EXCEPTIONS (ALL ARE UNCHECKED)

Throw

Catch

on

rethrow

finally

CLASSES

Class members

Constructors

Getting object type

instance variables

getters and setters

Named constructors

Initializer lists

Constant constructors

Redirecting constructors

Factory constructors

instance methods

abstract methods

abstract classes

Inheritance

Overriding

Overriding operators

noSuchMethod()

Extension methods

Enums

Mixins (on keyword in mixins)

Static keyword, static variables and methods

GENERICS

Restricting the parameterized type

Using generic methods

LIBRARIES AND VISIBILITY

import

as

show

hide

deferred

ASYNCHRONY SUPPORT

Futures

await

async

Streams

Stream methods

OTHER TOPICS

Generators

Callable classes

Isolates

Typedefs

Metadata

Custom annotation

Comments, Single-line comments, Multi-line comments, Documentation comments

OTHER KEYWORDS FUNCTIONS

covariant

export

external

part

sync

yield

FLUTTER ROADMAP

Flutter Installation (First App)

Flutter Installation

Basic Structure

Android Directory Structure

iOS Directory Structure

BASICS

MaterialApp

Scaffold

AppBar

Container

Icon

Image

PlaceHolder

RaisedButton

Text

RichText

STATELESS AND STATEFULWIDGETS

Differences

When To Use?

How To Use?

Add Some Functionality

INPUT

Form

Form Field

Text Field

TextEditing Controller

Focus Node

LAYOUTS

Align

Aspect Ratio

Baseline

Center

Constrained Box

Container

Expanded

Fitted Box

FractionallySizedBox

Intrinsic Height

Intrinsic Width

Limited Box

Overflow Box

Padding

Sized Box

SizedOverflowBox

Transform

Column

Flow

Grid View

Indexed Stack

Layout Builder

List Body

List View

Row

Stack

Table

Wrap

Safe Area

MATERIAL COMPONENTS

App bar

Bottom Navigation Bar

Drawer

Material App

Scaffold

SliverAppBar

TabBar

TabBarView

WidgetsApp

NAVIGATOR

pop

Routes

Bottom Navigation

Drawer

Create Multipage App

popUntil

canPop

push

pushNamed

popAndPushNamed

replace

pushAndRemoveUntil

NavigatorObserver

MaterialRouteBuilder

BUTTONS

ButtonBar

DropdownButton

FlatButton

FloatingActionButton

IconButton

OutlineButton

PopupMenuButton

RaisedButton

INPUT AND SELECTIONS

Checkbox

Date & Time Pickers

Radio

Slider

Switch

DIALOGS, ALERTS, AND PANELS

AlertDialog

BottomSheet

ExpansionPanel

SimpleDialog

SnackBar

INFORMATION DISPLAYS

Card

Chip

CircularProgressIndicator

DataTable

LinearProgressIndicator

Tooltip

LAYOUT

Divider

ListTile

Stepper

SCROLLING

CustomScrollView

NestedScrollView

NotificationListener

PageView

RefreshIndicator

ScrollConfiguration

Scrollable

Scrollbar

SingleChildScrollView

Theory …

Flutter -Inside View

Dart

Skia Engine

Performance

Comparison

App Built In Flutter

OTHER USEFUL WIDGETS

MediaQuery

LayoutBuilder

OrientationBuilder

FutureBuilder

StreamBuilder

DraggableScrollableSheet

Learn How to Use Third Party Plugins

CUPERTINO (IOS-STYLE) WIDGETS

CupertinoActionSheet

CupertinoActivityIndicator

CupertinoAlertDialog

CupertinoButton

CupertinoContextMenu

CupertinoDatePicker

CupertinoDialog

CupertinoDialogAction

CupertinoNavigationBar

CupertinoPageScaffold

CupertinoPicker

CupertinoPageTransition

CupertinoScrollbar

CupertinoSegmentedControl

CupertinoSlider

CupertinoSlidingSegmentedControl

CupertinoSwitch

CupertinoTabBar

CupertinoTabScaffold

CupertinoTabView

CupertinoTextField

CupertinoTimerPicker

ANIMATIONS

Ticker

Animation

AnimationController

Tween animation

Physics-based animation

AnimatedWidget

AnimatedBuilder

AnimatedContainer

AnimatedOpacity

AnimatedSize

FadeTransition

Hero

RotationTransition

ScaleTransition

SizeTransition

SlideTransition

NETWORKING

http, dio libraries

json parsing

Local Persistent Storage

SQFLITE

Shared Preferences

Hive

JSON

JSON- PARSING

INTERNATIONALI ZING FLUTTER APPS

Locale

AppLocalization

json files

STATE MANAGEMENT

setState

InheritedWidget

ScopedModel

Provider

Redux

BLOC

OTHER IMPORTANT TOPICS

Widget Tree, Element Tree and Render Tree

App Lifecycle

Dynamic Theming

Flare

Overlay widget

Visibility Widget

Spacer Widget

Universal error

Search Layout

CustomPainter

WidgetsBindingObserver

RouteObserver

SystemChrome

Internet connectivity

Http Interceptor

Google Map

Firebase Auth

Cloud FireStore DB

Real time DB

File/Image Upload

Firebase database

Firestore

Semantic versioning

Finding size and position of widget using RenderObject

Building release APK

Publishing APK on Play Store

RxDart

USEFUL TOOLS

Dev Tools

Observatory

Git and GitHub

Basics

Add ,Commit

Push

Pull

Github,Gitlab And Bitbucket

Learn How to Become UI Pro

Recreate Apps

Animations

Dribble -App Ui

Make Custom Widgets

Native Components

Native Share

Permissions

Local Storage

Bluetooth

WIFI

IR Sensor

API -REST/GRAPH

Consume API

Basics of Web Dev

Server

TESTING AND DEBUGGING

Debugging

Unit Testing

UI (Widget) Testing

Integration Testing

WRITING CUSTOM PLATFORM-SPECIFIC CODE

Platform Channel

Conclusion: There are some courses out there but I believe self-learning is the best. However, you can take help whenever you feel like it. Continue Your Journey By making Apps and also You can clone the existing apps for learning the concept more clearly like Ecommerce , Instagram , Expense Manager , Messenger ,bla bla …….

Most important thing to remember that don’t depend on others too much , when you face any problem just google it and a large flutter community is always with you.

Best of luck for your Flutter journey

Get Ready and Go………..

[rammina]

Day 43 of 100DaysOfCode Flutter Edition

TIP: DropdownButton class is a material design button for selecting from a list of items.

A dropdown button lets the user select from a number of items. 

[blog-by-raika]

【 Flutter 】Flutter を 基礎 から 学習 ( Material ComponentsとiOS-Style ) part136 Material Components

【 Flutter 】Flutter を 基礎 から 学習 ( Material ComponentsとiOS-Style ) part136 Material Components

「 基礎 から 学ぶ Flutter 」という書籍で  学習 したことを ブログでアウトプットしていこうと思います。今回は Material ComponentsとiOS-Style ( part136 )です。 ��回 【 Flutter 】Flutter を 基礎 から 学習 ( Material ComponentsとiOS-Style ) part135 Material Components 引き続き、Material Componentsについて学びます。 DropdownButton DropdownButtonは押下すると選択肢が表示されるボタンです。 DropdownListというのはよく聞くのですがボタンですか😎 import 'package:flutter/material.dart'; void main() { runApp(new…

[chogetaro]

[Flutter]ドロップダウンボタン(DropdownButton)の下線の色を設定する方法

どうも、ちょげ(@chogetarou)です。 ドロップダウンボタンの下線の色を設定する方法を紹介します。 方法 ドロップダウンの下線の色を設定するには、まず、DropDownButtonの引数「underline」にContainerやSizedBox、Dividerなどのウェジェットを指定します。 そして、指定したウェジェットで、色を設定します。 child: DropdownButton( underline: Container( height: 4, color:…

[edandose]

¿Qué es MaterialApp en Flutter?

¿Qué es MaterialApp en Flutter?

El uso del widget MaterialApp es completamente opcional, pero es una buena práctica. MaterialApp es una clase predefinida en flutter, Es probable que sea el componente principal o central de nueatra aplicación de flutter. Podemos acceder a todos los demás componentes y widgets proporcionados por Flutter SDK. Text widget, Dropdownbutton widget, AppBar widget, Scaffold widget, ListView widget,…

[chogetaro]

[Flutter]ドロップダウンボタン(DropdownButton)のアイコンを削除する方法

どうも、ちょげ(@chogetarou)です。 ドロップダウンボタンの右側に表示されるアイコンを削除する方法を紹介します。 方法 ドロップダウンボタンのアイコンを削除する方法は、２つあります。 iconSize １つは、引数「iconSize」に「０」を設定する方法です。 DropdownButton( iconSize: 0, value: _value, onChanged: (value) {}, items: [ ・・・ ], ) Visibility もう１つは、Visibilityを使う方法です。 まず、「Visibility」を引数「icon」に指定します。 そして、Visibilityの引数「visible」に「false」、「child」にアイコンを指定します。 DropdownButton( icon: Visibility( visible:…

[chogetaro]

[Flutter]ドロップダウンボタン(DropdownButton)の下線を無くすには？

どうも、ちょげ(@chogetarou)です。 ドロップダウンボタンの下線を無くす方法を紹介します。 方法 ドロップダウンボタンの下線を無くすには、引数「underline」を使います。 引数「underline」に何も設定しないContainerやSizedBoxなどを指定することで、下線を無くすことが出来ます。 以下は、Containerウェジェットを使った例です。 child: DropdownButton( underline:…

[chogetaro]

[Flutter]ドロップダウンボタン(DropdownButton)の下線の太さを変えるには？

どうも、ちょげ(@chogetarou)です。 ドロップダウンボタンの下線の太さを変える方法を紹介します。 方法 ドロップダウンの下線の太さを変えるには、引数「underline」を使います。 引数「underline」にContainerやSizedBox、Dividerなどを指定し、その高さ・太さを設定します。 以下は、Containerウェジェットを使った例です。 child: DropdownButton( underline: Container( color: Colors.red, height:…

[chogetaro]

[Flutter]ドロップダウンボタン(DropdownButton)のアイコンを変更するには？

どうも、ちょげ(@chogetarou)です。 ドロップダウンボタンの選択アイコンを変更する方法を紹介します。 方法 ドロップダウンボタンの選択アイコンを変更するには、引数「icon」を使います。 「icon」に、使用したいアイコンを指定します。 child: DropdownButton( icon : icon: Icon(Icons.arrow_downward), ・・・ ) オススメの記事 [Flutter]ドロップダウンボタン(DropDownButton)にプレースホルダーを設定する方法 [Flutter]ドロップダウンボタン(DropdownButton)を無効にする方法 [Flutter]AppBarにドロップダウンメニューを表示するには？

[chogetaro]

[Flutter]ドロップダウンボタン(DropdownButton)のアイコンのサイズを変更するには？

どうも、ちょげ(@chogetarou)です。 ドロップダウンボタンの選択する時に使うアイコンのサイズを変更する方法を紹介します。 方法 ドロップダウンボタンのアイコンのサイズを変更するには、DropdownButtonの引数「iconSize」を使います。 「iconSize」に設定したいサイズを指定します。 child: DropdownButton( iconSize: 60, ・・・・ )), オススメの記事 [Flutter]ドロップダウンボタン(DropDownButton)にプレースホルダーを設定する方法 [Flutter]ドロップダウンボタン(DropdownButton)を無効にする方法 [Flutter]AppBarにドロップダウンメニューを表示するには？

[chogetaro]

[Flutter]ドロップダウンボタン(DropDownButton)にプレースホルダーを設定する方法

どうも、ちょげ(@chogetarou)です。 ドロップダウンボタンにプレースホルダーを設定する方法を紹介します。 方法 ドロップダウンボタンにプレースホルダーを設定するには、引数「hint」を使います。 引数「hint」には、ウェジェットを指定できます。 この引数に、プレースホルダーを設定します。 child: DropdownButton( items: [], hint: Text('Select'), //プレースホルダー ) 「hint」は「Widget?」型なので、Text以外のウェジェットも使用することが出来ます。 DropdownButton( items: [], hint:…