Flutter (80): Example Http block download
80.1 Principles of HTTP Chunked DownloadThis section will demonstrate the specific usage of Dio through an example of "HTTP chunked downloading."The HTTP protocol defines the Transfer-Encodi···
Flutter (78): Initiate HTTP request through HttpClient
The Dart IO library provides several classes for initiating HTTP requests, and we can directly use HttpClient to make requests. Initiating a request using HttpClient involves five steps:Create an Http···
Flutter (77): File Operations
The Dart IO library includes classes related to file reading and writing, and it is part of the Dart syntax standard. Therefore, whether it's a script running under Dart VM or Flutter, file operat···
Flutter (75): Self-drawn components: DoneWidget
In this section, we will implement a DoneWidget that performs a checkmark animation upon creation, as shown in Figure:The implementation code is as follows:classDoneWidgetextendsLeafRenderObjectWidget···
Flutter (74): Self-drawn component: CustomCheckbox
74.1 CustomCheckboxThe default Checkbox component in Flutter does not allow for custom sizing. In this section, we will demonstrate how to create a CustomCheckbox component that supports customizable ···
Flutter (72): CustomPaint and Canvas
Custom Drawing in Flutter For some complex or irregular UIs, we may not be able to achieve the desired result simply by combining other components. For instance, we might need a regular hexagon, a gra···
Flutter (69): Introduction to custom component methods
Customizing Components in FlutterWhen the existing components provided by Flutter cannot meet our needs, or when we need to encapsulate some common components for code sharing, we need to create custo···
Flutter (68): Animation transition component
Custom Animation Transition Components For convenience in expression, we define components that execute transition animations when their widget properties change as "animation transition componen···
Flutter (67): AnimatedSwitcher
67.1 AnimatedSwitcher1. IntroductionIn practical development, we often encounter scenarios where UI elements need to be switched, such as tab switches or route transitions. To enhance the user experie···
Flutter (66): Interlaced animation
66.1 IntroductionSometimes, we may need complex animations that consist of a sequence of animations or overlapping animations. For example, consider a bar chart where the height increases while changi···