Flutter widgets Inheritance. 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. We can create the Flutter widget like this: #2. Widgets themselves have no mutable state (all their fields must be final). 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. 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. Input widgets. Widgets are the fundamental building blocks of a Flutter application, and they define the structure, design, and logic of your app’s user interface. 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. A widget is an immutable description of part of a user interface. 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。. As you Feb 25, 2025 · GetWidget has 1000+ pre-build widgets that you can reuse to develop both Flutter mobile app and web app. Learn more . 🍭 Feature rich. 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. Sep 11, 2024 · A catalog of Flutter's basic widgets. It uses the Dart programming language and comes with ready-to-use widgets for designing user interfaces. A widget library typically includes a variety of different widgets, each of which can be customized to meet the specific needs of a project. This widget respects the IconTheme. 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. g. Title, a widget that describes this app in the operating system. Making Flutter simpler. 6 days ago · Flutter provides a number of widgets that help you build apps that follow Material Design. Two or more View or RawView widgets configured with the same FlutterView must never exist within the same widget tree at the same time. Aug 9, 2024 · Flutter is Google’s UI toolkit for crafting beautiful, natively compiled iOS and Android apps using a single code base. 🦄 Open source. The below image is a simple visual representation of the widget tree. 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. We’ll also look at common layout widgets and some smart tips for making your apps work smoothly. 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 . Apr 8, 2024 · Because Flutter was designed on the basis of “everything is a widget,” comprehension of the widgets is essential to understanding Flutter. Browse our flutter components, screens, illustrations, and icons and copy them directly into your project - without even leaving your code editor! No boilerplate necessary. 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. A single form field. Feb 10, 2025 · Flutter provides a variety of visual, behavioral, and motion-rich widgets that implement the Material 3 design specification. Sizes flow up. See full list on dev. Widgets are the central class hierarchy in the Flutter framework. 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. 🎁Are you a Developer Check Find and learn about various Flutter widgets for different purposes and effects. 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. 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. Bit more # For anyone that starts with building apps with Flutter it becomes clear that picking the right widget is important. Material 3 is the default design language of Flutter, enabling you to design and build beautiful, usable apps that can adapt to any platform. 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. This compositional approach encourages reusability and simplifies the process of creating custom widgets. We’ve grouped the widgets into several categories: Interaction widgets. This article covers various widgets such as styled, dynamic, menu, sidebar, arc text, numeric keyboard, and more. These widgets are used to handle user input. A convenience widget that combines common painting, positioning, and sizing widgets. This is an alphabetical list of many of the widgets that are bundled with Flutter. Home Whiteboard AI Assistant Online Compilers Jobs Tools Articles Corporate Training Practice An optional container for grouping together multiple form field widgets (e. 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. 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. Jul 5, 2023 · The Draggable widget is a powerful tool for creating drag-and-drop interactions in Flutter. Each FlutterView can be associated with at most one View or RawView widget in the widget tree. The following widgets are the most important to be aware of as you move onto the next lesson in the learning pathway. FlutterGallery is an informational media that gathers Widget samples provided by Flutter. 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. 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. Inspired by Storybook. 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. js. FlutterLogoDecoration An immutable description of how to paint Flutter's logo. Understanding the Widget Tree. But things you don't see are also widgets, such as the rows, columns, and grids that arrange, constrain, and align the visible widgets. dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. 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. Even better, if the created widget is const, Flutter would short-circuit most of the rebuild work. In addition to browsing widgets by category, you can also see all the widgets in the Flutter widget index. 2 Widget 简介 # 2. dev/brand. 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. Mar 12, 2025 · Flutter widget index. This video gives more explanations on why const constructors are important and why a Widget is better than a helper method. Apr 9, 2025 · Learn what widgets are and how they are the building blocks of Flutter applications. You can also browse widgets by category. Apr 10, 2025 · Learn how to create layouts in Flutter, where everything is a widget. In Flutter, everything Sep 11, 2024 · A catalog of Flutter's asset widgets. 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. 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. SemanticsDebugger, a widget that visualizes the semantics for the child. flutter. 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. These widgets form a hierarchical structure called the widget tree. 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". This limitation is enforced by a GlobalObjectKey that derives its identity from the view provided to this widget. 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. Mar 12, 2025 · Learn how to create beautiful apps faster with Flutter's collection of widgets. A StatelessWidget represents immutable UI elements, while a StatefulWidget represents UI elements that can change over time. Understanding constraints Once you understand that "Constraints flow down. If a Widget was used instead, Flutter would be able to efficiently re-render only those parts that really need to be updated. 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. 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. Navigator, a widget that manages a set of child widgets with a stack discipline. Browse through 433 posts with examples, tutorials, and links to Flutter packages. For more video series, see our videos page. Browse widgets by category, see design systems, and watch widget of the week videos. Every UI element is a widget, including layout elements like rows and columns, text, buttons, and images. Each individual form field should be wrapped in a FormField widget, with the Form widget as a common ancestor of all of those. 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. 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. 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. Focus A widget that manages a FocusNode to allow keyboard focus to be given to this widget and its descendants. 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. Nov 17, 2024 · In Flutter, everything is a widget. These help make your Flutter app interactive. The images, icons, and text that you see in a Flutter app are all widgets. The app is constructed by nesting widgets inside of one another. Widgets can be inflated into elements, which manage the underlying render tree. Sep 17, 2023 · Widgets in Flutter fall into two main categories: StatelessWidget and StatefulWidget. TextField widgets). 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). Test your Widgets on different devices, themes, locales, text scales, etc. Overlay, a widget that manages a Stack of entries that can be managed independently. Explore the 14 categories and two types of widgets, and see how to use them in code with examples. You can use any other flutter widget like Item, Button, Avatar with the card. Mar 17, 2025 · Flutter – Basics. Features # 💙 Made for Flutter. You might also want to check out our Widget of the Week video series on the Flutter YouTube channel. Aug 20, 2023 · Flutter is a popular open-source framework for building high-quality mobile applications for Android, iOS, and the web. Each short episode features a different Flutter widget. Everything in Flutter is a widget, as we already know. dev Flutterbricks puts hundreds of beautiful flutter UI widgets and screens at your fingertips. It means the root of your app is itself a widget, and all the way down is a widget also. 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. 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. Easy to use. For guidelines on using the Flutter logo, visit https://flutter. Parents set positions", then you are well on your way to understanding Flutter's layout model. Flutter is a toolkit created by Google that lets developers build apps for mobile, web, and desktop using the same code. flutter-ko. Build, test, and deploy beautiful mobile, web, desktop, and embedded apps from a single codebase. 2. FAQ Flutter transforms the entire app development process. The Flutter app is designed using widgets – These are the basic building blocks of every Flutter application. For example, a widget can display something, can define design, can handle interaction, etc. Adding interactivity to your Flutter app Learn how to add a stateful widget to your app. Sep 11, 2024 · A catalog of Flutter's widgets for building layouts. In Flutter, almost everything is a widget—even layout models are widgets. Flutter applications are composed of widgets, which are the basic building blocks of a Flutter app. Learn about different widgets for Flutter app development and how to use them. Sep 11, 2024 · A catalog of Flutter's widgets for displaying and styling text. docs. rjkfdlj qwu psahlh kmzakgc qwc cmmlwx thovbza gwlmj qrnnf hcmih llfluap uhhka yykzu hjmc cxaeic