Flutter widgets.

Flutter widgets Sep 17, 2023 · Widgets in Flutter fall into two main categories: StatelessWidget and StatefulWidget. Flutter中的很多 Widget 是直接继承自 StatelessWidget 或 StatefulWidget，然后在 build() 方法中构建真正的RenderObjectWidget，如 Text，它其实是继承自 StatelessWidget，然后在 build() 方法中通过 RichText 来构建其子树，而 RichText 才是继承自 MultiChildRenderObjectWidget。 Apr 23, 2025 · Flutter provides an inbuilt widget called “Offstage†, which is been used to hide or show any widget programmatically depending on user action/event. Flutter Platform Widgets # TL;DR; # A wrapper library that makes it easier to target the design language of your chosen platform using a single widget. Widgets can be inflated into elements, which manage the underlying render tree. The choice of which widgets to use depends on the specific requirements of your app, but here are Apr 27, 2025 · A widget library is a collection of pre-built widgets, usually having a unique theme or style, that can be used directly in a Flutter application. Check out the agenda for this year's Google I/O! Create beautiful apps faster with Flutter’s collection of visual, structural, platform, and interactive widgets. If a Widget was used instead, Flutter would be able to efficiently re-render only those parts that really need to be updated. Sep 4, 2023 · Through detailed explanations and code examples, you’ll gain a solid understanding of how to harness the power of these widgets to create stunning mobile applications. 引用中文内容需注明本站及链接作为出处，英文内容和示例代码均遵从源站授权协议。 GF Flutter Card is a Flutter UI widget solution that has a border and box-shadow and comes with 5+ pre-designed clean cards that you can use straight away and customize easily as well. This limitation is enforced by a GlobalObjectKey that derives its identity from the view provided to this widget. Sep 11, 2024 · A catalog of Flutter's widgets for building layouts. Title, a widget that describes this app in the operating system. 🦄 Open source. Oct 20, 2022 · So, we’ve prepared a simple cheat sheet of different Flutter widgets (and in Flutter, everything is a widget!), which you can use to build your Flutter apps. 使用Flutter的一套的视觉、结构、平台、和交互式的widgets，快速创建漂亮的APP. Features # 💙 Made for Flutter. Every UI element is a widget, including layout elements like rows and columns, text, buttons, and images. FlutterGallery is an informational media that gathers Widget samples provided by Flutter. A StatelessWidget represents immutable UI elements, while a StatefulWidget represents UI elements that can change over time. Overlay, a widget that manages a Stack of entries that can be managed independently. Each individual form field should be wrapped in a FormField widget, with the Form widget as a common ancestor of all of those. 🎁Are you a Developer Check Find and learn about various Flutter widgets for different purposes and effects. The below image is a simple visual representation of the widget tree. dev Nov 4, 2023 · Flutter, Google’s open-source UI toolkit, has gained immense popularity among developers for its cross-platform capabilities and extensive widget library. Learn about different widgets for Flutter app development and how to use them. The images, icons, and text that you see in a Flutter app are all widgets. Build, test, and deploy beautiful mobile, web, desktop, and embedded apps from a single codebase. FAQ Flutter transforms the entire app development process. A widget that lays the child out as if it was in the tree, but without painting anything, without making the child available for hit Mar 17, 2025 · Widgets are nested with each other to build the app. Flutter applications are composed of widgets, which are the basic building blocks of a Flutter app. dev/brand. This video gives more explanations on why const constructors are important and why a Widget is better than a helper method. For guidelines on using the Flutter logo, visit https://flutter. Navigator, a widget that manages a set of child widgets with a stack discipline. Sizes flow up. Understanding constraints Once you understand that "Constraints flow down. Material 3 is the default design language of Flutter, enabling you to design and build beautiful, usable apps that can adapt to any platform. For instance, the Container widget, which is commonly used for decoration and alignment, is composed of several simpler widgets like Padding , Align Sep 4, 2023 · Flutter offers a wide range of widgets to help you layout the user interface (UI) of your app. Adding interactivity to your Flutter app Learn how to add a stateful widget to your app. This compositional approach encourages reusability and simplifies the process of creating custom widgets. Our motto is to provide the best Flutter UI library to the Flutter community to speed up their development process and build awesome apps with pre-build Flutter Library Components Mar 12, 2025 · You can find many more designs systems created by the Flutter community on pub. For example, a widget can display something, can define design, can handle interaction, etc. This widget respects the IconTheme. Apr 10, 2025 · Learn how to create layouts in Flutter, where everything is a widget. Apr 9, 2025 · Learn what widgets are and how they are the building blocks of Flutter applications. Two or more View or RawView widgets configured with the same FlutterView must never exist within the same widget tree at the same time. 当这个 Widget 被创建或者它的依赖项（例如传递给 Widget 的状态）发生变化时，框架就会调用 build 方法。这个方法有可能会在每一帧都被调用，所以它不应该有副作用，唯一职责就是完成 Widget 的构建。要深入了解 Flutter 如何渲染 Widget，请参阅 Flutter 架构概览。 借助 Flutter 上关于视觉、结构、平台和交互的 widget，我们可以快速创建出色的应用程序。除了能够按照如下类别浏览 widget，你还可以在 Flutter Widget 目录 中查看所有的 widget。 The Flutter logo, in widget form. You might also want to check out our Widget of the Week video series on the Flutter YouTube channel. Oct 23, 2024 · The Flutter SDK includes many built-in widgets, from the smallest pieces of UI, like Text, to layout widgets, and widgets that style your application. 🍭 Feature rich. Test your Widgets on different devices, themes, locales, text scales, etc. Animated version of DefaultTextStyle which automatically transitions the default text style (the text style to apply to descendant Text widgets without explicit style) over a Flutter provides a variety of visual, behavioral, and motion-rich widgets that implement the Material 3 design specification. In Flutter, everything Sep 11, 2024 · A catalog of Flutter's asset widgets. The widget library is one of the key… We will discover flutter widgets examples, how to make them, and the various types that the Flutter framework offers in this section. to Mar 18, 2025 · In this article, we’ll explore basic widgets, create simple layouts, understand two types of widgets (stateful and stateless), and learn how to handle user input like typing and button clicks. 6 days ago · Flutter provides a number of widgets that help you build apps that follow Material Design. Feb 10, 2025 · Flutter provides a variety of visual, behavioral, and motion-rich widgets that implement the Material 3 design specification. SemanticsDebugger, a widget that visualizes the semantics for the child. Browse through 433 posts with examples, tutorials, and links to Flutter packages. docs. Aug 9, 2024 · Flutter is Google’s UI toolkit for crafting beautiful, natively compiled iOS and Android apps using a single code base. Offstage Widget is a widget that lays the child out as if it was in the tree, but without painting anything, without making the child available for hit Apr 11, 2025 · The core of Flutter's layout mechanism is widgets. See full list on dev. This is an alphabetical list of many of the widgets that are bundled with Flutter. A container first surrounds the child with padding (inflated by any borders present in the decoration ) and then applies additional constraints to the padded extent (incorporating the width and height as constraints, if either is non-null). 2 Widget 简介 # 2. All areas of design and workflow, including layout management, state management, and animation, can be defined by widgets and, hence, can be constructed in Flutter apps. These widgets form a hierarchical structure called the widget tree. Inheritance. flutter-ko. Explore the 14 categories and two types of widgets, and see how to use them in code with examples. Jul 5, 2023 · The Draggable widget is a powerful tool for creating drag-and-drop interactions in Flutter. Input widgets. dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. The following widgets are the most important to be aware of as you move onto the next lesson in the learning pathway. Nov 17, 2024 · In Flutter, everything is a widget. We can create the Flutter widget like this: #2. js. 1 Widget 概念 在前面的介绍中，我们知道在Flutter中几乎所有的对象都是一个 widget 。与原生开发中“控件”不同的是，Flutter 中的 widget 的概念更广泛，它不仅可以表示UI元素，也可以表示一些功能性的组件如：用于手势检测的 GestureDetector 、用于APP主题数据传递的 Theme 等等，而原生 Discover a variety of Flutter widgets to build beautiful, responsive UIs for your apps, and learn how to use them effectively. Flutter widget 的设计思想跟 Android 略有不同，Flutter 中的 widget 可以用两条规则来约束： 一切都是 widget每个 widget 只负责自己关注的部分第一条意味着你所看到的东西都是由于 widget 构成，跟安卓不同的是… Widgets 结构. We’ve grouped the widgets into several categories: Interaction widgets. Flutter中文网是中国最大的Flutter开发者交流学习平台，致力于打造Flutter开发中文社区。在这里能轻松找到代码实例、项目案例、并有专人提供最新文档翻译。. You can use any other flutter widget like Item, Button, Avatar with the card. Bit more # For anyone that starts with building apps with Flutter it becomes clear that picking the right widget is important. For more video series, see our videos page. A single form field. Even better, if the created widget is const, Flutter would short-circuit most of the rebuild work. These help make your Flutter app interactive. Focus A widget that manages a FocusNode to allow keyboard focus to be given to this widget and its descendants. Making Flutter simpler. Inspired by Storybook. Browse our flutter components, screens, illustrations, and icons and copy them directly into your project - without even leaving your code editor! No boilerplate necessary. The Flutter app is designed using widgets – These are the basic building blocks of every Flutter application. 除非另有说明，本文档之所提及适用于 Flutter 的最新稳定版本，本页面最后更新时间: 2024-10-02。 查看文档源码 或者 为本页面内容提出建议 . These widgets are used to handle user input. Apr 8, 2024 · Because Flutter was designed on the basis of “everything is a widget,” comprehension of the widgets is essential to understanding Flutter. We’ll also look at common layout widgets and some smart tips for making your apps work smoothly. A widget library typically includes a variety of different widgets, each of which can be customized to meet the specific needs of a project. A Material app starts with the MaterialApp widget, which builds a number of useful widgets at the root of your app, including a Navigator, which manages a stack of widgets identified by strings, also known as "routes". g. In addition to browsing widgets by category, you can also see all the widgets in the Flutter widget index. Easy to use. It offers a rich set of pre-built widgets that allow developers to create… Sep 11, 2024 · A catalog of Flutter's widgets supporting user interaction and navigation. It means the root of your app is itself a widget, and all the way down is a widget also. A convenience widget that combines common painting, positioning, and sizing widgets. This widget maintains the current state of the form field, so that updates and validation errors are visually reflected in the Flutter Widget 目录. In Flutter, almost everything is a widget—even layout models are widgets. Flutter is a toolkit created by Google that lets developers build apps for mobile, web, and desktop using the same code. Mar 17, 2025 · Flutter – Basics. Mar 12, 2025 · Flutter widget index. Browse widgets by category, see design systems, and watch widget of the week videos. widget的主要工作是实现一个build函数，用以构建自身。一个widget通常由一些较低级别widget组成。Flutter框架将依次构建这些widget，直到构建到最底层的子widget时，这些最低层的widget通常为RenderObject，它会计算并描述widget的几何形状。 基础 Widget Sep 11, 2024 · A catalog of Flutter's animation widgets. dev Flutterbricks puts hundreds of beautiful flutter UI widgets and screens at your fingertips. 除了按类别浏览widget外，您还可以在Flutter widget 索引浏览Flutter中的所有widgets。 Sep 11, 2024 · A catalog of Flutter's input widgets. This article covers various widgets such as styled, dynamic, menu, sidebar, arc text, numeric keyboard, and more. Mar 12, 2025 · Learn how to create beautiful apps faster with Flutter's collection of widgets. A widget is an immutable description of part of a user interface. Widgets are the fundamental building blocks of a Flutter application, and they define the structure, design, and logic of your app’s user interface. dev, the package repository for Dart and Flutter, like for example the Windows-inspired fluent_ui, macOS-inspired macos_ui, and the Ubuntu-inspired yaru widgets. The app is constructed by nesting widgets inside of one another. Understanding the Widget Tree. Sep 11, 2024 · A catalog of Flutter's widgets for displaying and styling text. Oct 9, 2020 · FlutterにどんなWidgetが用意されているか確認しようと思い、Widget catalogをチラ見してみたけど把握しづらかったので、一つ一つ確認しがてら一覧に整理してみました。 (2019/10/20 - BasicsとMaterial Componentsの画像やカテゴリの追加を反映しました) The Widget Tree. Parents set positions", then you are well on your way to understanding Flutter's layout model. But things you don't see are also widgets, such as the rows, columns, and grids that arrange, constrain, and align the visible widgets. Each FlutterView can be associated with at most one View or RawView widget in the widget tree. Everything in Flutter is a widget, as we already know. Widgets are the central class hierarchy in the Flutter framework. Each short episode features a different Flutter widget. Home Whiteboard AI Assistant Online Compilers Jobs Tools Articles Corporate Training Practice An optional container for grouping together multiple form field widgets (e. You can use it to create widgets that can be dragged and dropped within a parent widget or even between In Flutter, complex widgets are built by combining many simpler, single-purpose widgets. Aug 20, 2023 · Flutter is a popular open-source framework for building high-quality mobile applications for Android, iOS, and the web. Widgets themselves have no mutable state (all their fields must be final). TextField widgets). 你可以在下方以字母顺序查看各个 Widget 的使用方法，几乎包括了所有与 Flutter 相关的 widget。除此之外你还可以查阅 核心 Widget 目录。 我们每周都会在 Youtube Flutter 频道 发布关于 Widget 的系列视频，你可以前去观看学习。每一个短视频都介绍了 Introduction to Widgets in Flutter - Explore the fundamentals of widgets in Flutter, learn how to create and use widgets effectively for developing stunning mobile applications. As you Feb 25, 2025 · GetWidget has 1000+ pre-build widgets that you can reuse to develop both Flutter mobile app and web app. flutter. Nov 2, 2023 · In this article, we’ve dived deep into the Flutter widget tree, understanding its structure, composition, properties, and its critical role in building efficient Flutter applications. It uses the Dart programming language and comes with ready-to-use widgets for designing user interfaces. You can also browse widgets by category. Object; DiagnosticableTree Flutter中文网是中国最大的Flutter开发者交流学习平台，致力于打造Flutter开发中文社区。在这里能轻松找到代码实例、项目案例、并有专人提供最新文档翻译。 Apr 22, 2025 · A Flutter package that helps developers catalog their widgets, test them quickly on multiple devices and themes and share them easily with designers and clients. Learn more . Sep 11, 2024 · A catalog of Flutter's basic widgets. FlutterLogoDecoration An immutable description of how to paint Flutter's logo. 2. pliyv qlyg vabpelz omi vzddiu jbgmw isfynmn cqmzs bjin ibfi hsfqlw faisr rlylm ianwyt sujr