Flutter Mobile Development

Flutter enables building beautiful, natively compiled applications from a single codebase. Here's how to get started.

Why Flutter?

Key advantages of Flutter:

• Single codebase for iOS and Android
• Hot reload for rapid development
• Beautiful UI with customizable widgets

Widget System

Core Concepts

1. Everything is a widget
2. Composition over inheritance
3. Stateless vs Stateful widgets
   • StatelessWidget for static UI
   • StatefulWidget for dynamic UI
4. BuildContext for tree navigation

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1// Example: A simple counter app
2class CounterApp extends StatefulWidget {
3  @override
4  _CounterAppState createState() => _CounterAppState();
5}
6
7class _CounterAppState extends State<CounterApp> {
8  int _count = 0;
9
10  @override
11  Widget build(BuildContext context) {
12    return Scaffold(
13      body: Center(child: Text("Count: $_count")),
14      floatingActionButton: FloatingActionButton(
15        onPressed: () => setState(() => _count++),
16        child: Icon(Icons.add),
17      ),
18    );
19  }
20}

State Management

"Flutter takes care of the pixels, you take care of the logic."

• Flutter Team

Best Practices

Write better Flutter code:

• Extract widgets for reusability
• Use const constructors for performance
• Deeply nested widgets Compose smaller widgets

Flutter Docs is your comprehensive guide!