Learn FLUTTER with Real Code Examples

Flutter compiles to native ARM and x86 code for high performance.

It uses its own rendering engine (Skia) to draw every pixel on screen, ensuring consistency across platforms.

Flutter emphasizes widget-based architecture and reactive UI programming.

Widget-based UI system

Declarative reactive framework

Compiled native performance

Platform channel integrations

State management extensibility

Open-source package ecosystem

Widgets and widget tree

Stateful vs stateless widgets

Layouts and constraints

Navigation and routing

Asynchronous programming with Futures/Streams

Package and plugin system

lib/ -> Dart source files

pubspec.yaml -> Dependencies

android/ & ios/ -> Platform code

assets/ -> Images, fonts

main.dart -> App entry point

Create project with flutter create

Build UI with widgets

Manage state using Provider/Bloc/etc.

Integrate backend/APIs

Run and debug

Build & deploy to stores

Beginner: Simple UI screens

Intermediate: API integration

Advanced: Complex animations

Expert: Custom render objects, platform channels

More performant UI than React Native

More predictable rendering than native hybrids

More flexible than low-code tools

Larger binary size than pure native apps

2017 - Alpha release

2018 - Flutter 1.0 stable

2020 - Web/desktop beta

2021 - Flutter 2.0 (null safety)

2022 - Flutter 3.0 full desktop support

2023–2025 - Performance, rendering & tooling improvements

Widget: Immutable UI description

State: Mutable data driving UI changes

Hot Reload: UI refresh without restart

Skia: Flutter’s rendering engine