Flutter:如何修复和添加边框和颜色到勾勒出的按钮？

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('Flutter Button with Border and Color')),
        body: Center(
          child: ElevatedButton(
            onPressed: () {},
            child: Container(
              decoration: BoxDecoration(
                color: Colors.blue, // 设置按钮背景颜色
                borderRadius: BorderRadius.circular(8), // 设置圆角
                border: Border.all(
                  color: Colors.white, // 设置边框颜色
                  width: 2, // 设置边框宽度
                ),
              ),
              padding: EdgeInsets.all(16),
              child: Text(
                'Click Me',
                style: TextStyle(color: Colors.white),
              ),
            ),
          ),
        ),
      ),
    );
  }
}