Flutter 플러터 Progress bar 진행바 간단 구현 LinearProgressIndicator

• 코드 예시

import 'package:flutter/material.dart';

class MyWidget extends StatefulWidget {
  const MyWidget({Key? key}) : super(key: key);

  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  double _progressValue = 0.0;

  void _updateProgress() {
    setState(() {
      _progressValue += 0.1;
      if (_progressValue >= 1.0) {
        _progressValue = 0.0;
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Linear Progress Indicator Example'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            LinearProgressIndicator(
              value: _progressValue,
            ),
            SizedBox(height: 20),
            ElevatedButton(
              child: Text('Update Progress'),
              onPressed: _updateProgress,
            ),
          ],
        ),
      ),
    );
  }
}