Flutter (7): Introduction to Dart language
7.1 Variable Declaration#1) var KeywordSimilar to the var in JavaScript, it can receive variables of any type. However, the biggest difference is that in Dart, once a var variable is assigned a value,···
Flutter (6): Common configuration issues
1. Android Studio Issues#1) Missing Dependency Library IssueOne of the most common issues when getting started with Android is related to missing dependency libraries, as shown in Figure . At this poi···
Flutter (5): Connect to the device and run the Flutter app
On Windows, Flutter only supports building and running applications for Android devices, while macOS supports both iOS and Android devices. Below are instructions on how to connect Android and iOS dev···
Flutter (4): IDE configuration and usage
Theoretically, you can use any text editor and command-line tools to build Flutter applications. However, Flutter officially recommends using either Android Studio or VS Code for a better development ···
Flutter (87): Implementing Localizations
In the previous section, we discussed how the Material component library supports internationalization. In this section, we will explore how to support multiple languages in our own UI. As mentioned e···
Flutter (83): Convert JSON to Dart Model class
83.1 JSON to Dart Classes1. IntroductionIn practical applications, backend APIs often return structured data such as JSON or XML. For example, the data returned from requesting the GitHub API is a JSO···
Flutter (81): Using WebSockets
The HTTP protocol is stateless, meaning that clients can only initiate requests, and servers respond passively. The server cannot actively push content to the client, and once the server's respons···
Flutter (79): Http request library - dio
79.1 Introducing DioAs mentioned in the previous section, directly using HttpClient to make network requests can be cumbersome, as many aspects require manual handling. When it comes to file uploads/d···
Flutter (76): Watermark Example: Text Drawing and Off-Screen Rendering
In this section, we will introduce how to draw text and perform off-screen rendering by implementing a watermark component.In practical scenarios, watermarks usually need to cover the entire screen. I···
Flutter (73): Self-drawn example: circular background gradient progress bar
In this section, we will implement a circular background gradient progress bar with the following features:Support for multiple background gradient colors.Arbitrary arc angles; the progress bar does n···