flutter - flutter 中带有圆角的警报对话框

Question

我正在尝试在 Flutter 中创建一个带有圆角的警报对话框，如下图所示。还在这里添加我的代码，但我的输出与预期的完全不同。任何人，请帮助我。

预期的警报对话框

我的代码在这里。

void _showAlert() {
AlertDialog dialog = new AlertDialog(
  content: new Container(
    width: 260.0,
    height: 230.0,
    decoration: new BoxDecoration(
      shape: BoxShape.rectangle,
      color: const Color(0xFFFFFF),
      borderRadius: new BorderRadius.all(new Radius.circular(32.0)),
    ),
    child: new Column(
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: <Widget>[
        // dialog top
        new Expanded(
          child: new Row(
            children: <Widget>[
              new Container(
                // padding: new EdgeInsets.all(10.0),
                decoration: new BoxDecoration(
                  color: Colors.white,
                ),
                child: new Text(
                  'Rate',
                  style: TextStyle(
                    color: Colors.black,
                    fontSize: 18.0,
                    fontFamily: 'helvetica_neue_light',
                  ),
                  textAlign: TextAlign.center,
                ),
              ),
            ],
          ),
        ),

        // dialog centre
        new Expanded(
          child: new Container(
              child: new TextField(
            decoration: new InputDecoration(
              border: InputBorder.none,
              filled: false,
              contentPadding: new EdgeInsets.only(
                  left: 10.0, top: 10.0, bottom: 10.0, right: 10.0),
              hintText: ' add review',
              hintStyle: new TextStyle(
                color: Colors.grey.shade500,
                fontSize: 12.0,
                fontFamily: 'helvetica_neue_light',
              ),
            ),
          )),
          flex: 2,
        ),

        // dialog bottom
        new Expanded(
          child: new Container(
            padding: new EdgeInsets.all(16.0),
            decoration: new BoxDecoration(
              color: const Color(0xFF33b17c),
            ),
            child: new Text(
              'Rate product',
              style: TextStyle(
                color: Colors.white,
                fontSize: 18.0,
                fontFamily: 'helvetica_neue_light',
              ),
              textAlign: TextAlign.center,
            ),
          ),
        ),
      ],
    ),
  ),
);

showDialog(context: context, child: dialog);
}
}

我从上面的代码得到的输出是。

Answer 1

虽然我迟到了解决方案，但这可能有助于其他人搜索它。以下代码片段详细说明了如何实现它。

import 'package:flutter/material.dart';

void main() => runApp(MyApp());
Color myColor = Color(0xff00bfa5);

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: "Rounde Alert Box",
      home: Scaffold(
        appBar: AppBar(
          backgroundColor: myColor,
          title: Text("Rounded Alert Box"),
        ),
        body: RoundedAlertBox(),
      ),
    );
  }
}

class RoundedAlertBox extends StatefulWidget {
  @override
  _RoundedAlertBoxState createState() => _RoundedAlertBoxState();
}

class _RoundedAlertBoxState extends State<RoundedAlertBox> {
  @override
  Widget build(BuildContext context) {
    return Center(
      child: RaisedButton(
        onPressed: openAlertBox,
        color: myColor,
        child: Text(
          "Open Alert Box",
          style: TextStyle(color: Colors.white),
        ),
      ),
    );
  }

  openAlertBox() {
    return showDialog(
        context: context,
        builder: (BuildContext context) {
          return AlertDialog(
            shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.all(Radius.circular(32.0))),
            contentPadding: EdgeInsets.only(top: 10.0),
            content: Container(
              width: 300.0,
              child: Column(
                mainAxisAlignment: MainAxisAlignment.start,
                crossAxisAlignment: CrossAxisAlignment.stretch,
                mainAxisSize: MainAxisSize.min,
                children: <Widget>[
                  Row(
                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                    mainAxisSize: MainAxisSize.min,
                    children: <Widget>[
                      Text(
                        "Rate",
                        style: TextStyle(fontSize: 24.0),
                      ),
                      Row(
                        mainAxisSize: MainAxisSize.min,
                        children: <Widget>[
                          Icon(
                            Icons.star_border,
                            color: myColor,
                            size: 30.0,
                          ),
                          Icon(
                            Icons.star_border,
                            color: myColor,
                            size: 30.0,
                          ),
                          Icon(
                            Icons.star_border,
                            color: myColor,
                            size: 30.0,
                          ),
                          Icon(
                            Icons.star_border,
                            color: myColor,
                            size: 30.0,
                          ),
                          Icon(
                            Icons.star_border,
                            color: myColor,
                            size: 30.0,
                          ),
                        ],
                      ),
                    ],
                  ),
                  SizedBox(
                    height: 5.0,
                  ),
                  Divider(
                    color: Colors.grey,
                    height: 4.0,
                  ),
                  Padding(
                    padding: EdgeInsets.only(left: 30.0, right: 30.0),
                    child: TextField(
                      decoration: InputDecoration(
                        hintText: "Add Review",
                        border: InputBorder.none,
                      ),
                      maxLines: 8,
                    ),
                  ),
                  InkWell(
                    child: Container(
                      padding: EdgeInsets.only(top: 20.0, bottom: 20.0),
                      decoration: BoxDecoration(
                        color: myColor,
                        borderRadius: BorderRadius.only(
                            bottomLeft: Radius.circular(32.0),
                            bottomRight: Radius.circular(32.0)),
                      ),
                      child: Text(
                        "Rate Product",
                        style: TextStyle(color: Colors.white),
                        textAlign: TextAlign.center,
                      ),
                    ),
                  ),
                ],
              ),
            ),
          );
        });
  }
}

代码片段的输出如下所示: