import 'dart:ui' as ui; 

I can't figure out what the dart ui is doing?

Can someone explain by example where we use it and what happens if we don't use it?

CodePudding user response：

Dart.ui has the built-in types and core primitives for a Flutter application. Things like the definition of Color, Images, the Canvas, etc. Not importing it means that flutter won't know that Color is a type, as an example. You can read more about it here: https://api.flutter.dev/flutter/dart-ui/dart-ui-library.html

CodePudding user response：

To use, import dart:ui.

This library exposes the lowest-level services that Flutter frameworks use to bootstrap applications, such as classes for driving the input, graphics text, layout, and rendering subsystems.