.swift

  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text("Flutter Ratings Widget Demo")),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Rating((rating) {
                setState(() {
                  _rating = rating;
                });
              }, 5),
              SizedBox(
                  height: 44,
                  child: (_rating != null && _rating != 0)
                      ? Text("You selected $_rating rating",
                          style: TextStyle(fontSize: 18))
                      : SizedBox.shrink())
            ],
          ),
        ));
  }