我目前正在Flutter开发一个Android应用程序。我如何添加一个圆形按钮?
当前回答
如果你使用材质应用程序作为你的主小部件,你总是可以使用材质按钮。
Padding(
padding: EdgeInsets.symmetric(vertical: 16.0),
child: Material(
borderRadius: BorderRadius.circular(30.0),//Set this up for rounding corners.
shadowColor: Colors.lightBlueAccent.shade100,
child: MaterialButton(
minWidth: 200.0,
height: 42.0,
onPressed: (){//Actions here//},
color: Colors.lightBlueAccent,
child: Text('Log in', style: TextStyle(color: Colors.white),),
),
),
)
其他回答
使用Flutter版本2,请尝试以下操作
ElevatedButton(
style: ButtonStyle(
shape: MaterialStateProperty.all<OutlinedBorder>(
RoundedRectangleBorder(
side:
BorderSide(width: 1.0, color: Colors.red,
borderRadius:
BorderRadius.circular(5.0),),),
backgroundColor: MaterialStateProperty.all<Color>(Colors.red),
foregroundColor: MaterialStateProperty.all<Color>(Colors.green),
elevation:
MaterialStateProperty.all<double>(8.0),
padding: MaterialStateProperty.all<EdgeInsetsGeometry>(
const EdgeInsets.symmetric(
horizontal: 15.0,
vertical: 10.0),),),
onPressed: (){},
child: Text('Button'),)
1. 解决方案概述
FlatButton和RaisedButton已弃用。
因此,你可以使用形状放在样式属性,为TextButton和ElevatedButton。
自Flutter 2.0以来有一些变化:
style:属性类型已更改为ButtonStyle shape:属性类型已更改为MaterialStateProperty<T>
2. 圆形的按钮
在style属性中存在shape属性:
style: ButtonStyle(
shape: MaterialStateProperty.all<RoundedRectangleBorder>(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(18.0),
side: BorderSide(color: Colors.red)
)
)
)
方形按钮
对于方形按钮,您可以使用ElevatedButton或添加其他方式:
style: ButtonStyle(
shape: MaterialStateProperty.all<RoundedRectangleBorder>(
RoundedRectangleBorder(
borderRadius: BorderRadius.zero,
side: BorderSide(color: Colors.red)
)
)
)
完整的示例
Row(
mainAxisAlignment: MainAxisAlignment.end,
children: [
TextButton(
child: Text(
"Add to cart".toUpperCase(),
style: TextStyle(fontSize: 14)
),
style: ButtonStyle(
padding: MaterialStateProperty.all<EdgeInsets>(EdgeInsets.all(15)),
foregroundColor: MaterialStateProperty.all<Color>(Colors.red),
shape: MaterialStateProperty.all<RoundedRectangleBorder>(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(18.0),
side: BorderSide(color: Colors.red)
)
)
),
onPressed: () => null
),
SizedBox(width: 10),
ElevatedButton(
child: Text(
"Buy now".toUpperCase(),
style: TextStyle(fontSize: 14)
),
style: ButtonStyle(
foregroundColor: MaterialStateProperty.all<Color>(Colors.white),
backgroundColor: MaterialStateProperty.all<Color>(Colors.red),
shape: MaterialStateProperty.all<RoundedRectangleBorder>(
RoundedRectangleBorder(
borderRadius: BorderRadius.zero,
side: BorderSide(color: Colors.red)
)
)
),
onPressed: () => null
)
]
)
圆边颜色容器:
Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(10),
border: Border.all(color: Colors.red),
),
child: Text("Some Text"),
)
addButton() {
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Padding(
padding: const EdgeInsets.symmetric(vertical: 10.0),
child: SizedBox(
height: 45,
width: 200,
child: ElevatedButton.icon(
onPressed: () async {},
style: ButtonStyle(
shape: MaterialStateProperty.all<RoundedRectangleBorder>(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(30.0),
)),
elevation: MaterialStateProperty.all(1),
backgroundColor: MaterialStateProperty.all(Colors.blue),
),
icon: Icon(Icons.add, size: 18),
label: Text("Add question"),
),
),
),
],
);
}
在Flutter中,Container()小部件用于设置小部件的样式。使用Container()小部件,您可以设置任何小部件的边框或圆角。
如果您想设置任何类型的样式和装饰,请将该小部件放到Container()小部件中。这为装饰提供了许多属性。
Container(
width: 100,
padding: EdgeInsets.all(10),
alignment: Alignment.center,
decoration: BoxDecoration(
color: Colors.blueAccent,
borderRadius: BorderRadius.circular(30)), // Make rounded corner
child: Text("Click"),
)