Flutter FloatingActionButton – Rounded Rectangle Shape

Change shape of Flutter FloatingActionButton to Rounded Rectangle

The shape of FloatingActionButton is circular by default. But, you can provide a Rectangle border shape with rounded corners.

In this tutorial, we will learn how to define a rounded rectangle shape for FloatingActionButton.

Define the shape of floatingActionButton with RoundedRectangleBorder(). Provide borderRadius with required radius value as shown in the following example.

Example: Rounded Rectangle Shape Border to FloatingActionButton

To recreate this example, create a basic Flutter Application and replace the code in your main.dart with the following code.

main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
    home: MyApp(),
  ));
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: new Text("Flutter Tutorial - googleflutter.com"),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: (){},
        child: Icon(Icons.refresh),
        shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.all(Radius.circular(15.0))
        ),
      ),
    );
  }
}

Screenshot

The border shape of FloatingActionButton is Rectangle with rounded corners. You may change the radius value and observe the output.

Summary

In this Flutter Tutorial, we learned how to change the border shape of FloatingActionButton to rounded rectangle.