Using SVG (Scalable Vector Graphics) in Flutter can be a great way to add vector-based graphics to your app. SVG is an XML-based format for describing two-dimensional vector graphics, and Flutter provides a package called flutter_svg that allows you to easily incorporate SVG files into your Flutter project. Here are some scenarios when you might consider using Flutter SVG:
When to use Flutter SVG:
SVG graphics are resolution-independent and can scale without losing quality. This makes them suitable for various screen sizes and resolutions. You could never know the size of the screen that the user will use. Nowadays users may run an app – on a 4-5 inch screen and on 60-70 smart television..
SVG Images Size
In great majority of cases an image, icon or logo saved in SVG is much smaller – compared to JPG or PNG. This improves the size of apps and web pages.
SVG files can be interactive, allowing users to interact with different elements within the graphic. This can be useful for creating interactive and dynamic user interfaces. Some more materials could be found here:
- an Articles https://firstname.lastname@example.org/implementing-interactive-svgs-in-flutter-a-comprehensive-guide-835863f42886
- a plugin https://pub.dev/packages/interactable_svg
- Figuring out how to use it: https://stackoverflow.com/questions/57489968/draw-and-interact-with-svg-in-flutter
SVG files support animations, and you can animate different parts of the SVG using animations, making it useful for creating dynamic and engaging user interfaces. Here is the package that will allow it: https://pub.dev/packages/animated_svg, or
https://stackoverflow.com/questions/53992195/does-flutter-support-animated-svg. For greater animations – the better choice may be the Rive Package – that is optimized engine for cooler visual effects and performance.
When not to use Flutter SVG:
Static Bitmap Images
If your graphics are entirely static and won’t benefit from scalability or interactivity, using traditional image formats (like PNG or JPEG) might be more straightforward. Be mindful of the memory usage, especially if you are dealing with a large number of SVG files. Consider using optimized SVGs or converting them to other formats if necessary.
Complex Visual Requirements
Many pictures are dense with different visuals elements and colors. Such images will not get smaller nor with better performance by converting them to SVG. Some effects may be archived with smaller effort by code. One such example are the gradients. Another approach is to use the image API to draw the required items programmatically.
For simple icons or graphics that don’t require scalability or dynamic features, using Flutter’s built-in Icon class with custom images might be more straightforward.