Create a rounded button / button with border-radiu

问题:

I'm currently developing an Android app in Flutter. How can I add a rounded button?

回答1:

You can use shape for FlatButton and RaisedButton.

for rounded button:

shape: RoundedRectangleBorder(
        borderRadius: new BorderRadius.circular(18.0),
        side: BorderSide(color: Colors.red)
),

for square button:

shape: RoundedRectangleBorder(
           borderRadius: new BorderRadius.circular(0.0),
           side: BorderSide(color: Colors.red)
),

Row(
    mainAxisAlignment: MainAxisAlignment.end,
    children: <Widget>[
      FlatButton(
        shape: new RoundedRectangleBorder(
            borderRadius: new BorderRadius.circular(18.0),
            side: BorderSide(color: Colors.red)),
        color: Colors.white,
        textColor: Colors.red,
        padding: EdgeInsets.all(8.0),
        onPressed: () {},
        child: Text(
          "Add to Cart".toUpperCase(),
          style: TextStyle(
            fontSize: 14.0,
          ),
        ),
      ),
      SizedBox(width: 10),
      RaisedButton(
        shape: new RoundedRectangleBorder(
            borderRadius: new BorderRadius.circular(18.0),
            side: BorderSide(color: Colors.red)),
        onPressed: () {},
        color: Colors.red,
        textColor: Colors.white,
        child: Text("Buy now".toUpperCase(),
            style: TextStyle(fontSize: 14)),
      ),
    ],   
)

回答2:

You can use the RaisedButton Widget. Raised Button Widget has shape property which you can utilise as shown in below snippet.

 RaisedButton(
          child: Text("Press Me"),
          onPressed: null,
          shape: RoundedRectangleBorder(borderRadius: new BorderRadius.circular(30.0))
        )

回答3:

You can simply use 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),
    ),
  ),
)

Output:

More info: RSCoder

回答4:

You can simply use RaisedButton or you can use InkWell to get custom button and also properties like onDoubleTap, onLongPress and etc.:

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),),),
  ),
),

If you want to use splashColor, highlightColor properties in InkWell widget, use Material widget as the parent of InkWell widget instead of decorating the container(deleting decoration property). Read why? here.

回答5:

There are many ways of doing it. I am listing few here.

(1) Using RoundedRectangleBorder

RaisedButton(
  shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
  onPressed: () {},
  child: Text("Button"),
)

(2) Using ClipRRect

ClipRRect(
  borderRadius: BorderRadius.circular(40),
  child: RaisedButton(
    onPressed: () {},
    child: Text("Button"),
  ),
)

(3) Using ClipOval

ClipOval(
  child: RaisedButton(
    onPressed: () {},
    child: Text("Button"),
  ),
)

(4) Using ButtonTheme

ButtonTheme(
  shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
  child: RaisedButton(
    onPressed: () {},
    child: Text("Button"),
  ),
)

(5) Using StadiumBorder

RaisedButton(
  shape: StadiumBorder(),
  onPressed: () {},
  child: Text("Button"),
)

回答6:

You can use the below code to make rounded button with a gradient color.

 Container(
          width: 130.0,
          height: 43.0,
          decoration: BoxDecoration(
            borderRadius: BorderRadius.circular(30.0),
            gradient: LinearGradient(
              // Where the linear gradient begins and ends
              begin: Alignment.topRight,
              end: Alignment.bottomLeft,
              // Add one stop for each color. Stops should increase from 0 to 1
              stops: [0.1, 0.9],
              colors: [
                // Colors are easy thanks to Flutter's Colors class.
                Color(0xff1d83ab),
                Color(0xff0cbab8),
              ],
            ),
          ),
          child: FlatButton(
            child: Text(
              'Sign In',
              style: TextStyle(
                fontSize: 16.0,
                fontFamily: 'Righteous',
                fontWeight: FontWeight.w600,
              ),
            ),
            textColor: Colors.white,
            color: Colors.transparent,
            shape:
                RoundedRectangleBorder(borderRadius: BorderRadius.circular(30.0)),
            onPressed: () {

            },
          ),
        );

回答7:

You should probably familiarize yourself with this page of the docs in particular: rounding corners.

The docs show you how to change the styling of a component and the equivalent styling in css, if you are familiar with that already.

回答8:

You can use this code for a transparent rounded button by passing a transparent color to the color property inside BoxDecoration. eg. color: Colors.transparent. Also, take note that this button makes use of only the Container and GestureDetector widgets.

Container(
    height: 50.0,
    child: GestureDetector(
        onTap: () {},
        child: Container(
            decoration: BoxDecoration(
                border: Border.all(
                    color: Color(0xFFF05A22),
                    style: BorderStyle.solid,
                    width: 1.0,
                ),
                color: Colors.transparent,
                borderRadius: BorderRadius.circular(30.0),
            ),
            child: Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: <Widget>[
                    Center(
                        child: Text(
                           "BUTTON",
                            style: TextStyle(
                                color: Color(0xFFF05A22),
                                fontFamily: 'Montserrat',
                                fontSize: 16,
                                fontWeight: FontWeight.w600,
                                letterSpacing: 1,
                            ),
                        ),
                    )
                ],
            ),
        ),
    ),
)

回答9:

You can always use material button if you are using Material App as your main Widget.

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),),
    ),
  ),
)

回答10:

If anybody is looking for complete circular button than I achieved it this way.

Center(
            child: SizedBox.fromSize(
              size: Size(80, 80), // button width and height
              child: ClipOval(
                child: Material(
                  color: Colors.pink[300], // button color
                  child: InkWell(
                    splashColor: Colors.yellow, // splash color
                    onTap: () {}, // button pressed
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: <Widget>[
                        Icon(Icons.linked_camera), // icon
                        Text("Picture"), // text
                      ],
                    ),
                  ),
                ),
              ),
            ),
          )

回答11:

In Flutter Container() widget use for styling your widget.Using Container() widget you can set border or rounded corner of any widget

If you want to set any type of styling & set decoration put that widget into the Container() widget, that provide many property to decoration.

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"),
)

回答12:

to use any shape in You'r Button make sure you perform all the code inside Button widget

 **shape: RoundedRectangleBorder(
        borderRadius: new BorderRadius.circular(18.0),
        side: BorderSide(color: Colors.red) ),**

if you want make it Square used ` BorderRadius.circular(0.0), it automatically make into Square

the button like this`

Here is the all source code for the give UI Screen

 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),
          ),
        ],
      ),
    ),
  ),
);