如何更改我的高架按钮的形状

Question

 
import 'package:flutter/material.dart';

class SignInPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Time Tracker'),
        elevation: 5.0,
      ),
      body: _buildContent(),
      backgroundColor: Colors.amber[50],
    );
  }

  Widget _buildContent() {
    return Padding(
      padding: EdgeInsets.all(16.0),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: <Widget>[
          Text(
            'Sing in',
            textAlign: TextAlign.center,
            style: TextStyle(
              fontSize: 32.0,
              fontWeight: FontWeight.w600,
            ),
          ),
          SizedBox(height: 8.0),
          ElevatedButton(
            child: Text('Sing in with google'),
            onPressed: () {},
            style: ElevatedButton.styleFrom(
                primary: Colors.purple[200],
                onPrimary: Colors.black87,
                elevation: 6.0,
                shadowColor: Colors.yellow[200],
          ),
        ],
      ),
    );
  }
}

1_ 我不知道如何在这种情况下更改按钮的形状，并且我在最后一个方块]第 41 行的末尾显然有一个错误。请帮助我修复它，我提前感谢您的帮助。

Answer 1

您可以使用 Container 作为 Button 的子项或执行以下操作：

      ElevatedButton.styleFrom(
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(30.0),
        ),
        child: Text(' Elevated Button'),
      ),

Answer 2

You can use the following way:

Inside elevated button,

style: ButtonStyle(
  shape: MaterialStateProperty.all<RoundedRectangleBorder>(
    RoundedRectangleBorder(
      borderRadius: BorderRadius.circular(18.0),
      side: BorderSide(color: Colors.red)
    )
  )
)

Here you can play with borderRadius property to get different shapes.