Flutter Toast 생성 https://pub.dev/packages/fluttertoast 1. 라이브러리 추가 fluttertoast: ^8.0.8 2. 코드 추가 Build Context 없는 상태 Fluttertoast.showToast( msg: "This is Center Short Toast", toastLength: Toast.LENGTH_SHORT, gravity: ToastGravity.CENTER, timeInSecForIosWeb: 1, backgroundColor: Colors.red, textColor: Colors.white, fontSize: 16.0 ); Build Context 있는 상태 FToast fToast; @override void initState() { ..