Getting Started with Flutter

Flutter is a UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase.

Installing Flutter

To start developing with Flutter, you first need to install the Flutter SDK on your system. You can follow the installation instructions in the official Flutter documentation.

flutter doctor

This command will help you verify if you have everything needed to start developing with Flutter.

Creating a New Project

You can create a new Flutter project using the following command:

flutter create my_first_app
cd my_first_app

This will create a new Flutter project in the my_first_app directory.

Running the Application

To run your Flutter application, you can use the following command:

flutter run

This will compile and run your application on an emulator or connected device. Now you can see your application in action!

Writing Your First Application

You can edit the lib/main.dart file to start writing your Flutter application. Here’s an example of a simple counter application.

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Demo'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}