Create a rounded button / button with border-radiu

Question

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

Answer 1

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

Answer 2

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"),
)

Answer 3

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: () {

            },
          ),
        );

Answer 4

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,
                            ),
                        ),
                    )
                ],
            ),
        ),
    ),
)

Answer 5

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

Answer 6

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.