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
要在按钮中使用任何形状,请确保执行button小部件内的所有代码:
**shape: RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(18.0),
side: BorderSide(color: Colors.red) ),**
如果你想让它变成正方形,使用BorderRadius.circular(0.0),它会自动把它变成正方形。
按钮是这样的:
下面是给出UI屏幕的所有源代码:
Scaffold(
backgroundColor: Color(0xFF8E44AD),
body: new Center(
child: Column(
children: <Widget>[
Container(
margin: EdgeInsets.fromLTRB(90, 10, 20, 0),
padding: new EdgeInsets.only(top: 92.0),
child: Text(
"Currency Converter",
style: TextStyle(
fontSize: 48,
fontWeight: FontWeight.bold,
color: Colors.white,
),
),
),
Container(
margin: EdgeInsets.only(),
padding: EdgeInsets.all(25),
child: TextFormField(
decoration: new InputDecoration(
filled: true,
fillColor: Colors.white,
labelText: "Amount",
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(10),
),
),
),
),
Container(
padding: EdgeInsets.all(25),
child: TextFormField(
decoration: new InputDecoration(
filled: true,
fillColor: Colors.white,
labelText: "From",
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(10),
),
),
),
),
Container(
padding: EdgeInsets.all(25),
child: TextFormField(
decoration: new InputDecoration(
filled: true,
fillColor: Colors.white,
labelText: "To",
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(10),
)),
),
),
SizedBox(height: 20.0),
MaterialButton(
height: 58,
minWidth: 340,
shape: RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(12)),
onPressed: () {},
child: Text(
"CONVERT",
style: TextStyle(
fontSize: 24,
color: Colors.black,
),
),
color: Color(0xFFF7CA18),
),
],
),
),
),
);
其他回答
您可以简单地使用RaisedButton
Padding(
padding: EdgeInsets.only(left: 150.0, right: 0.0),
child: RaisedButton(
textColor: Colors.white,
color: Colors.black,
child: Text("Search"),
onPressed: () {},
shape: new RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(30.0),
),
),
)
输出:
更多信息:RSCoder
你可以简单地使用RaisedButton或你可以使用InkWell来获得一个自定义按钮和属性,如onDoubleTap, onLongPress等:
new InkWell(
onTap: () => print('hello'),
child: new Container(
//width: 100.0,
height: 50.0,
decoration: new BoxDecoration(
color: Colors.blueAccent,
border: new Border.all(color: Colors.white, width: 2.0),
borderRadius: new BorderRadius.circular(10.0),
),
child: new Center(child: new Text('Click Me', style: new TextStyle(fontSize: 18.0, color: Colors.white),),),
),
),
如果你想在InkWell小部件中使用splashColor和highlightColor属性,使用Material小部件作为InkWell小部件的父部件,而不是装饰容器(删除装饰属性)。在这里阅读原因。
另一个很酷的解决方案在2021年也适用:
TextButton(
child: Padding(
padding: const EdgeInsets.all(5.0),
child: Text('Follow Us'.toUpperCase()),
),
style: TextButton.styleFrom(
backgroundColor: Colors.amber,
shadowColor: Colors.red,
elevation: 2,
textStyle: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(5.0),)
),
onPressed: () {
print('Pressed');
},
),
在容器小部件中包装一个TextButton,如下所示:
Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(5),
border: Border.all(color: Colors.black),
),
child: TextButton(
onPressed: () {
// To do
},
child: Text("Go to Change Language Screen "),
),
)
创建圆角按钮最简单的方法之一是使用FlatButton,然后通过设置其shape属性指定圆度。遵循下面的代码
FlatButton ( 填充:EdgeInsets.all (30.0), 颜色:Colors.black, 形状:RoundedRectangleBorder ( borderRadius: BorderRadius.circular (20.0)), child: child: Text( “按钮”, TextStyle(颜色:Colors.white), ), onPressed:() { 打印(“按钮按下”); }, ),
注意:为了改变圆度,调整BorderRadius.circular()中的值