如何用linearPercentIndicator对flutter进行实时密码验证？

import 'package:flutter/material.dart';
import 'package:linear_percent_indicator/linear_percent_indicator.dart';

class PasswordVerificationPage extends StatefulWidget {
  @override
  _PasswordVerificationPageState createState() => _PasswordVerificationPageState();
}

class _PasswordVerificationPageState extends State<PasswordVerificationPage> {
  double _progress = 0.0; // 用于跟踪进度的变量

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Password Verification'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            LinearPercentIndicator(
              width: 200.0,
              lineHeight: 20.0,
              percent: _progress, // 根据进度变量来显示进度
              backgroundColor: Colors.grey,
              progressColor: Colors.blue,
            ),
            SizedBox(height: 20.0),
            RaisedButton(
              child: Text('Verify Password'),
              onPressed: () {
                // 在这里执行密码验证的逻辑
                // 根据验证的进度更新_progress变量
                setState(() {
                  _progress += 0.1; // 假设每次验证增加10%的进度
                });
              },
            ),
          ],
        ),
      ),
    );
  }
}