tween_animation_test.dart

import 'package:flutter/material.dart';
import 'dart:math' as math;

class TweenAnimationTest extends StatefulWidget {
  @override
  _TweenAnimationTestState createState() => _TweenAnimationTestState();
}

class _TweenAnimationTestState extends State<TweenAnimationTest> {
  double endValue = 0.0;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: Column(
          children: [
            Expanded(
              child: Center(
                child: TweenAnimationBuilder(
                  duration: Duration(seconds: 1),
                  tween: Tween<double>(begin: 0.0, end: endValue),
                  builder: (context, value, child) {
                    return Transform.rotate(
                      angle: value,
                      child: FlutterLogo(
                        size: 100,
                      ),
                    );
                  },
                ),
              ),
            ),
            RaisedButton(
              onPressed: () {
                setState(() {
                  endValue = 2 * math.pi;
                });
              },
              child: Text('Animate'),
            )
          ],
        ),
      ),
    );
  }
}