Flutter CupertinoActivityIndicator – Radius

Flutter CupertinoActivityIndicator Radius

To set the radius of CupertinoActivityIndicator widget in Flutter, assign a double value to the radius property of this CupertinoActivityIndicator widget.

Syntax

A CupertinoActivityIndicator with specific radius.

CupertinoActivityIndicator(
  radius: 20,
),

Example

Flutter Application with a CupertinoActivityIndicator widget.

For the first CupertinoActivityIndicator widget, radius is set to 20.

For the second CupertinoActivityIndicator widget, radius is set to 40.

main.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

/// main application widget
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  static const String _title = 'Flutter Application';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      home: Scaffold(
        appBar: AppBar(title: const Text(_title)),
        body: const MyStatefulWidget(),
      ),
    );
  }
}

/// stateful widget that the main application instantiates
class MyStatefulWidget extends StatefulWidget {
  const MyStatefulWidget({Key? key}) : super(key: key);

  @override
  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}

/// private State class that goes with MyStatefulWidget
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  @override
  Widget build(BuildContext context) {
    return Center(
      child: Column(
        children: const <Widget>[
          SizedBox(height: 30,),
          CupertinoActivityIndicator(
            radius: 20,
          ),
          SizedBox(height: 30,),
          CupertinoActivityIndicator(
            radius: 40,
          ),
        ],
      ),
    );
  }
}

Screenshot