Transperant Background and Button Multiple Background Color in Flutter

Transperant Background and Button Multiple Background Color in Flutter :

Screenshot :

main.dart

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

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Tutorial',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(
        title: 'Flutter Tutorial',
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  bool _tapped1 = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Stack(children: <Widget>[
      Column(mainAxisSize: MainAxisSize.max, children: <Widget>[
        Expanded(
            child: Container(
                child: Opacity(
                    opacity: 0.95,
                    child: FadeInImage(
                      placeholder: MemoryImage(kTransparentImage),
                      image: const AssetImage('assets/carrom.jpg'),
                      fit: BoxFit.cover,
                    ))))
      ]),
      Column(children: <Widget>[
        Expanded(
            child: Container(
                child: Center(
                    child: Container(
                        height: 50,
                        decoration: BoxDecoration(
                            gradient: LinearGradient(
                          begin: Alignment.topLeft,
                          end: Alignment.bottomRight,
                          colors: <Color>[
                            Colors.black,
                            Colors.red,
                          ],
                          stops: const <double>[0.5, 0.5],
                        )),
                        child: Center(
                            child: Text(
                          'Flutter Tutorial',
                          textAlign: TextAlign.center,
                          style: TextStyle(
                              color: Colors.white, fontWeight: FontWeight.bold),
                        )))))),
        Expanded(
            child: SafeArea(
                child: Padding(
                    padding: const EdgeInsets.all(40.0),
                    child: Row(children: <Widget>[
                      Expanded(
                          child: FlatButton(
                              shape: RoundedRectangleBorder(
                                borderRadius: BorderRadius.circular(10.0),
                              ),
                              child: Padding(
                                padding: const EdgeInsets.all(10.0),
                                child: Text(
                                  'Start Game',
                                  style: TextStyle(
                                    color:
                                        _tapped1 ? Colors.blue : Colors.white,
                                    fontSize: 18.0,
                                  ),
                                ),
                              ),
                              color: _tapped1
                                  ? Colors.white
                                  : Colors.black.withOpacity(0.25),
                              onPressed: () {}))
                    ]))))
      ])
    ]));
  }
}

pubspec.yaml

name: flutter_ticket_pass
description: A new Flutter application.
version: 1.0.0+1

environment:
  sdk: ">=2.1.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  cupertino_icons: ^0.1.2
  transparent_image:

dev_dependencies:
  flutter_test:
    sdk: flutter

flutter:
  uses-material-design: true

  assets:
    - assets/carrom.jpg

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