animated_list.dart

class AnimatedItem extends StatefulWidget {
  final String title;

  const AnimatedItem({Key key, this.title}) : super(key: key);

  @override
  _AnimatedItemState createState() => _AnimatedItemState();
}

class _AnimatedItemState extends State<AnimatedItem>
    with SingleTickerProviderStateMixin, AutomaticKeepAliveClientMixin {
  AnimationController _controller;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      vsync: this,
      duration: Duration(seconds: 1),
    );
    _controller.forward();
  }

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

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return SlideTransition(
      position: Tween<Offset>(
        begin: Offset(1.0, 0.0),
        end: Offset(0.0, 0.0),
      ).animate(
        _controller,
      ),
      child: ListTile(
        title: Text(widget.title),
      ),
    );
  }

  @override
  bool get wantKeepAlive => true;
}