四舍五入LinearProgressIndicator

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('LinearProgressIndicator Example')),
        body: Center(
          child: RoundedLinearProgressIndicator(),
        ),
      ),
    );
  }
}

class RoundedLinearProgressIndicator extends StatefulWidget {
  @override
  _RoundedLinearProgressIndicatorState createState() =>
      _RoundedLinearProgressIndicatorState();
}

class _RoundedLinearProgressIndicatorState extends State<RoundedLinearProgressIndicator> {
  double _progress = 0.0;

  @override
  void initState() {
    super.initState();
    // 模拟进度更新
    Future.delayed(Duration(seconds: 2), () {
      setState(() {
        _progress = 0.45;
      });
    });
    Future.delayed(Duration(seconds: 4), () {
      setState(() {
        _progress = 0.78;
      });
    });
    Future.delayed(Duration(seconds: 6), () {
      setState(() {
        _progress = 1.0;
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    double roundedProgress = (_progress * 100).round() / 100; // 四舍五入到两位小数
    return LinearProgressIndicator(
      value: roundedProgress,
      backgroundColor: Colors.grey[300],
      valueColor: AlwaysStoppedAnimation<Color>(Colors.blue),
    );
  }
}