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  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Example Animations'),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          firstChild(),

mohak1283

 @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Example Animations'),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          firstChild(),

mohak1283

class HomeScreen extends StatefulWidget {
  @override
  _HomeScreenState createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
  
Animation _arrowAnimation, _heartAnimation;
AnimationController _arrowAnimationController, _heartAnimationController;  
  

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  Widget firstChild() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceAround,
      children: <Widget>[
        AnimatedBuilder(
          animation: _arrowAnimationController,
          builder: (context, child) => Transform.rotate(
                angle: _arrowAnimation.value,
                child: Icon(
                  Icons.expand_more,

mohak1283

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Example Animations'),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          firstChild(),

mohak1283

class HomeScreen extends StatefulWidget {
  @override
  _HomeScreenState createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
  
Animation _arrowAnimation;
AnimationController _arrowAnimationController;  
  

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    AnimationController _animationController =
        AnimationController(vsync: this, duration: Duration(seconds: 1));

    Animation _animation =  Tween(begin: 0.0, end: -0.15).animate(
        CurvedAnimation(curve: Curves.ease, parent: _animationController));

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Animation transformAnimation = BorderRadiusTween(
      begin: BorderRadius.circular(125.0),
      end: BorderRadius.circular(0.0).animate(type_of_animation);
      
      
/////////////// OR ///////////////

Animation transformAnimation = Tween<BorderRadius>(
      begin: BorderRadius.circular(125.0),
      end: BorderRadius.circular(0.0).animate(type_of_animation);

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Animation _animation = Tween(begin: 0.0, end: 1.0).animate(type_of_animation);

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class HomeScreen extends StatefulWidget {
  @override
  _HomeScreenState createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen>
    with SingleTickerProviderStateMixin {

  AnimationController _animationController;