flutter button

flutter button

button类型：

RaisedButton ：    凸起的按钮，其实就是Android中的Material Design风格的Button ，继承自MaterialButton

FlatButton ：        扁平化的按钮，继承自MaterialButton

OutlineButton    ：带边框的按钮，继承自MaterialButton

IconButton    ：    图标按钮,继承自StatelessWidget

shape:属性

 BeveledRectangleBorder 带斜角的长方形边框

 CircleBorder 圆形边框

 RoundedRectangleBorder 圆角矩形

 StadiumBorder 两端是半圆的边框

eg:

FlatButton(

      child: Text('SimpleDialog'),

           color: Colors.green,

          // highlightColor: Colors.transparent,

             splashColor: Colors.transparent,

             shape: StadiumBorder(),  //两边圆角

             onPressed: () {

                   },

)

去除水波纹效果

splashColor: Colors.transparent,

自定义带渐变色button

import 'package:flutter/material.dart';

class GradientButton extends StatelessWidget {

  GradientButton({

    this.colors,

    this.width,

    this.height,

    this.onTap,

    @required this.child,

  });

  // 渐变色数组

  final List<Color> colors;

  // 按钮宽高

  final double width;

  final double height;

  final Widget child;

  //点击回调

  final GestureTapCallback onTap;

  @override

  Widget build(BuildContext context) {

    ThemeData theme = Theme.of(context);

    //确保colors数组不空

    List<Color> _colors = colors ??

        [theme.primaryColor, theme.primaryColorDark ?? theme.primaryColor];

    return DecoratedBox(

      decoration: BoxDecoration(

        gradient: LinearGradient(colors: _colors),

      ),

      child: Material(

        type: MaterialType.transparency,

        child: InkWell(

          splashColor: colors.last,

          highlightColor: Colors.transparent,

          onTap: onTap,

          child: ConstrainedBox(

            constraints: BoxConstraints.tightFor(height: height, width: width),

            child: Center(

              child: Padding(

                padding: const EdgeInsets.all(8.0),

                child: DefaultTextStyle(

                    style: TextStyle(fontWeight: FontWeight.bold),

                    child: child),

              ),

            ),

          ),

        ),

      ),

    );

  }

}