Simple layout

main.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:flutter/material.dart';

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

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

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

  final String title;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(title),
      ),
      body: Stack(
        fit: StackFit.expand,
        children: [
          Container(
            child: FlutterLogo(),
            color: Colors.grey,
          ),
          Align(
            child: Row(
              children: [
                Padding(
                  padding: const EdgeInsets.all(32.0),
                  child: Container(
                    child: Text('SuperHost'),
                    color: Colors.amber,
                  ),
                ),
                Spacer(),
                Padding(
                  padding: const EdgeInsets.all(32.0),
                  child: CustomCheckBox(),
                ),
              ],
            ),
            alignment: Alignment.topCenter,
          ),
          Align(
            child: Padding(
              padding: const EdgeInsets.all(16.0),
              child: Text('DOT HERE'),
            ),
            alignment: Alignment.bottomCenter,
          ),
        ],
      ),
    );
  }
}

class CustomCheckBox extends StatefulWidget {
  @override
  CustomCheckBoxState createState() {
    return CustomCheckBoxState();
  }
}

class CustomCheckBoxState extends State<StatefulWidget> {
  bool checked = false;

  @override
  Widget build(BuildContext context) {
    return InkWell(
      //can be changed by images
      child: Container(child: checked ? Text('checked') : Text('not checked')),
      onTap: () {
        setState(() {
          checked = !checked;
        });
      },
    );
  }
}