Flutter 生态系统与环境配置

Flutter is Google’s UI toolkit for building natively compiled apps across mobile, web, and desktop — all from one codebase. Write once, run everywhere.

Flutter’s big wins: a single codebase for every platform, instant Hot Reload, expressive widgets, and native ARM performance. Fast to build, fast to run.

Flutter runs on Dart, Google’s UI-optimized, object-oriented language. You’ll write every app in it — and we cover the basics next, so no worries.

Flutter’s layered architecture uses the Skia engine to draw every pixel itself. Your UI is just a tree of widgets that Flutter renders to screen.

You’ll build in an IDE — usually VS Code (lightweight, great extensions) or Android Studio (full-featured, bundles the Android SDK). Both work great.

The Flutter SDK has all the build tools. Download it from flutter.dev, extract it somewhere stable, and add flutter/bin to your PATH.

Run flutter doctor to scan your environment. It’s a health check that flags any missing dependencies or config before you build.

Set up your IDE plugin: install the Flutter extension in VS Code or the Flutter plugin in Android Studio. It pulls in Dart support, completion, and debugging.

Let’s confirm Dart runs. This isn’t a UI app — just a tiny program proving your environment is ready.

Which of the following are key benefits of using the Flutter framework? (Select all that apply)

Great work! You met Flutter: one codebase for every platform, Hot Reload, native speed, and Dart as its language. You also set up the SDK and IDE.