Flutter SVG - Dart

Flutter is a popular mobile app development framework that allows developers to build high-quality, native apps for both iOS and Android platforms. With Flutter, developers can use a single codebase to create apps that look and feel native on both platforms.

Flutter also supports SVG (Scalable Vector Graphics), a vector image format that allows developers to create complex, scalable graphics for their apps. In this article, we'll take a closer look at how to use SVG in Flutter using Dart, the language used for writing Flutter apps.

SVG in Flutter

SVG is an XML-based vector graphics format that is supported by Flutter. It is a powerful tool for creating graphics that can be scaled to any size without losing quality. SVG files can be created using a variety of tools, including Adobe Illustrator, Inkscape, Sketch, and Figma.

In Flutter, SVG files can be imported into the app as assets, just like images or other resources. Once imported, the SVG can be displayed using a SvgPicture widget from the flutter_svg package. For example:

import 'package:flutter_svg/flutter_svg.dart';

SvgPicture.asset(
  'assets/images/example.svg',
  semanticsLabel: 'Example SVG',
);

The semanticsLabel parameter provides an accessibility label for the image, which can be used by screen readers or other assistive technologies to describe the image to users with disabilities.

SVG Animation in Flutter

Flutter also supports animating SVG graphics using the flutter_svg package. This allows developers to create dynamic, interactive graphics that respond to user input or other events.

To animate an SVG in Flutter, we can use the AnimatedSvg widget. This widget takes an SvgPicture as its child and allows us to specify animations using a variety of parameters, including duration, curve, and repeatCount. For example:

import 'package:flutter_svg/flutter_svg.dart';

AnimatedSvg(
  'assets/images/example.svg',
  semanticsLabel: 'Example SVG',
  duration: const Duration(seconds: 1),
  curve: Curves.linear,
  repeatCount: 3,
);

This code will animate the SVG by repeating the animation three times over one second using a linear curve.

Conclusion

Using SVG in Flutter with Dart is a powerful way to create scalable, high-quality graphics for mobile apps. With the flutter_svg package, we can import and display SVG graphics as assets and animate them using the AnimatedSvg widget. Whether you're building a simple app or a complex, interactive experience, SVG in Flutter can help you create beautiful, responsive graphics.