Shaking Button

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

void main() => runApp(MaterialApp(
      title: 'Example',
      home: MyApp(),
    ));

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

class MyAppState extends State<MyApp> with SingleTickerProviderStateMixin {
  Animation animation;
  AnimationController animationController;

  @override
  void initState() {
    animationController =
        AnimationController(duration: Duration(milliseconds: 100), vsync: this);
    animation = Tween(begin: 0.0, end: 10.0).animate(animationController);
    super.initState();
  }

  void onPressed() {
    animation.addStatusListener((status) {
      if (status == AnimationStatus.completed) {
        animationController.reverse();
      } else if (status == AnimationStatus.dismissed) {
        animationController.forward();
      }
    });
    animationController.forward();
    print('Pushed the Button');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: <Widget>[
          ButtonAnimation(
            onPressed: onPressed,
            animation: animation,
          ),
          Container(
            width: 100.0,
            height: 100.0,
          ),
          RaisedButton(
            child: Text('Stop Animation'),
            onPressed: () {
              animationController.stop();
            },
          )
        ]));
  }

  @override
  void dispose() {
    animationController.dispose();
    super.dispose();
  }
}

class ButtonAnimation extends AnimatedWidget {
  ButtonAnimation({Key key, Animation animation, this.onPressed})
      : super(key: key, listenable: animation);

  Function onPressed;

  @override
  Widget build(BuildContext context) {
    Animation animation = listenable;
    return Center(
      child: Container(
        margin: EdgeInsets.only(left: animation.value ?? 0),
        child: RaisedButton(
          child: Text("Push Me"),
          onPressed: onPressed,
        ),
      ),
    );
  }
}