【 Flutter 】Flutter を 基礎 から 学習 ( ウィジェット編 ) part77 Painting and effects

import 'dart:ui';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(new MaterialApp(home: new MyApp()));
}

class MyApp extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _State();
  }
}

class _State extends State<MyApp> {
  int _index = 0;
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        home: Scaffold(
            appBar: AppBar(
              title: Text('テスト中です。'),
            ),
            body: Stack(children: <Widget>[
              Center(
                child: Image.asset('images/cat_nekoko.png'),
              ),
              BackdropFilter(
                filter: ImageFilter.blur(
                  sigmaX: 5,
                  sigmaY: 5,
                ),
                child: Container(color: Colors.black.withOpacity(0.5)),
              )
            ])));
  }
}