如何在颤振对话框中添加圆形边框？

Question

如何在颤动中为对话框添加圆形边框？，我尝试了下面的代码，但无法获得所需的输出，我已经添加了圆形边框，但它不起作用，我需要对话框的圆形边框，请参阅预期输出详情请指导

我的代码：`

class CustomDialog extends StatelessWidget {                                                          
  @override
  Widget build(BuildContext context) {                                                                  
    const double padding = 1.0;                                                                                
    return Dialog(
        backgroundColor: Colors.green,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(8.0),
        ),
        child: Container(
            decoration: BoxDecoration(
                borderRadius: BorderRadius.all(Radius.circular(20.0))),
            child: Column(mainAxisSize: MainAxisSize.min, children: [
              Container(
                margin: EdgeInsets.all(1),
                width: double.infinity,
                child: Text('title',
                    style: TextStyle(fontSize: 30, color: Colors.white)),
                color: Colors.green,
              ),
              Container(
                color: Colors.white,
                padding: EdgeInsets.all(10),
                child: ListView(
                  shrinkWrap: true,
                  children: [
                    Container(
                        margin: EdgeInsets.only(left: 10, bottom: 10),
                        height: 30,
                        child: Text('one',
                            style: TextStyle(
                              fontSize: 20,
                            ))),
                    Container(
                        margin: EdgeInsets.only(left: 10, bottom: 10),
                        height: 30,
                        child: Text('one',
                            style: TextStyle(
                              fontSize: 20,
                            ))),
                    Container(
                        margin: EdgeInsets.only(left: 10, bottom: 10),
                        height: 30,
                        child: Text('one',
                            style: TextStyle(
                              fontSize: 20,
                            ))),
                  ],
                ),
              ),
              Divider(
                color: Colors.white,
              ),
              Container(
                  color: Colors.white,
                  height: 50,
                  padding: EdgeInsets.all(5),
                  alignment: Alignment.centerRight,
                  child: Text(
                    'CANCEL',
                    style: TextStyle(fontSize: 20),
                  )),
            ])));
  }
}

`

我的期望：

电流输出：

Answer 1

只需要添加ClipBehavior到对话框即可。

import 'package:flutter/material.dart';

class CustomDialog extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    const double padding = 1.0;
    return Dialog(
      backgroundColor: Colors.green,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(20.0),
      ),
      clipBehavior: Clip.antiAlias, //  add clipBehavior 
      child: Column(mainAxisSize: MainAxisSize.min, children: [
        Container(
          margin: EdgeInsets.all(1),
          width: double.infinity,
          child: Text('title',
              style: TextStyle(fontSize: 30, color: Colors.white)),
          color: Colors.green,
        ),
        Container(
          color: Colors.white,
          padding: EdgeInsets.all(10),
          child: ListView(
            shrinkWrap: true,
            children: [
              Container(
                  margin: EdgeInsets.only(left: 10, bottom: 10),
                  height: 30,
                  child: Text('one',
                      style: TextStyle(
                        fontSize: 20,
                      ))),
              Container(
                  margin: EdgeInsets.only(left: 10, bottom: 10),
                  height: 30,
                  child: Text('one',
                      style: TextStyle(
                        fontSize: 20,
                      ))),
              Container(
                  margin: EdgeInsets.only(left: 10, bottom: 10),
                  height: 30,
                  child: Text('one',
                      style: TextStyle(
                        fontSize: 20,
                      ))),
            ],
          ),
        ),
        Divider(
          color: Colors.white,
        ),
        Container(
            color: Colors.white,
            height: 50,
            padding: EdgeInsets.all(5),
            alignment: Alignment.centerRight,
            child: Text(
              'CANCEL',
              style: TextStyle(fontSize: 20),
            )),
      ]),
    );
  }
}

Answer 2

问题在于Container您用来包装其他小部件的问题，您可以向每个容器添加特定的边框半径来修复。

我添加了一个演示和代码来获得您想要的输出：

class CustomDialog extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Dialog(
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(15.0),
      ),
      child: Container(
        height: 340,
        child: Column(
          children: [
            Container(
              height: 60,
              width: double.infinity,
              padding: EdgeInsets.all(
                15.0,
              ),
              decoration: BoxDecoration(
                color: Colors.green,
                borderRadius: BorderRadius.only(
                  topLeft: Radius.circular(
                    15.0,
                  ),
                  topRight: Radius.circular(
                    15.0,
                  ),
                ),
              ),
              child: Text(
                'Baby Names',
                style: TextStyle(
                  fontSize: 20,
                  color: Colors.white,
                ),
              ),
            ),
            ...List.generate(
              5,
              (index) => Padding(
                padding: const EdgeInsets.all(10.0),
                child: Align(
                  alignment: Alignment.centerLeft,
                  child: Text(
                    'List Names',
                    style: TextStyle(
                      fontSize: 18,
                    ),
                  ),
                ),
              ),
            ),
            Divider(
              color: Colors.grey[200],
              thickness: 1.5,
            ),
            Padding(
              padding: const EdgeInsets.all(10.0),
              child: Align(
                alignment: Alignment.centerRight,
                child: Text(
                  'CANCEL',
                  style: TextStyle(
                    fontSize: 18,
                    color: Colors.green,
                  ),
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

结果：