继承AnimationWidget可以自动更新控件，不用监听了！

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> with TickerProviderStateMixin {
  AnimationController animationController;
  CurvedAnimation curve;
  Animation animationSize;
  Animation animationColor;
  Animation animationIcon;
  @override
  void initState() {
    animationController = AnimationController(
        vsync: this,
        duration: Duration(
          milliseconds: 2000,
        ));
    curve =
        CurvedAnimation(parent: animationController, curve: Curves.easeInOut);
    animationSize = Tween(
      begin: 78.0,
      end: 368.0,
    ).animate(curve);
    animationColor =
        ColorTween(begin: Colors.redAccent, end: Colors.green).animate(curve);
    animationIcon = Tween(begin: 0.0,end: 360.0).animate(curve);

    animationController.addStatusListener((AnimationStatus status) {
      print(status);
    });

    // TODO: implement initState
    super.initState();
  }

  @override
  void dispose() {
    // TODO: implement dispose
    animationController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(''),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: <Widget>[
          AnimationArrow(
            animations: [animationSize, animationColor,animationIcon],
            controller: animationController,
          ),
        ],
      ),
    );
  }
}

class AnimationArrow extends AnimatedWidget {
  final List animations;
  final AnimationController controller;
  AnimationArrow({this.animations, this.controller})
      : super(listenable: controller);

  @override
  Widget build(BuildContext context) {
    List<Widget> iconWidget = [Icon(Icons.map),Icon(Icons.security)];
    int index=1;
    // TODO: implement build
    return IconButton(
        icon: iconWidget[index],
        iconSize: animations[0].value,
        color: animations[1].value,
        onPressed: () {
          switch (controller.status) {
            case AnimationStatus.completed:
              controller.reverse();
              break;
            default:
              controller.forward();
              break;
          }
        });
  }
}