Flutter BoxDecoration でグラデーション

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
      width: MediaQuery.of(context).size.width,
      decoration: BoxDecoration(
        gradient: LinearGradient(
            colors: [
              const Color(0xFFFA7397),
              const Color(0xFFFDDE42),
            ],
        ),
      ),
    );
  }
}

コード全部

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
      width: MediaQuery.of(context).size.width,
      decoration: BoxDecoration(
        gradient: LinearGradient(
            colors: [
              const Color(0xFFFA7397),
              const Color(0xFFFDDE42),
            ],
         ),
      ),
    );
  }
}