This gist includes two different Scaffolds for two different pages.

MeatProject.dart

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

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.deepOrange,
      ),
      home: Checkout(),
    );
  }
}

class AddressBook extends StatefulWidget {
  @override
  _AddressBookState createState() => _AddressBookState();
}

class _AddressBookState extends State<AddressBook> {
  final Color bg = Color(0xfff2f2f2);
  final Color primary = Color(0xffFF5F44);

  Widget listItemWidget(
      int id, bool isDefault, String name, String address, String phone) {
    return Container(
      margin: EdgeInsets.symmetric(vertical: 10),
      decoration: BoxDecoration(
        color: Colors.white,
      ),
      height: 248,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        mainAxisSize: MainAxisSize.max,
        mainAxisAlignment: MainAxisAlignment.start,
        children: <Widget>[
          Container(
            height: 64,
            child: Row(
              mainAxisSize: MainAxisSize.max,
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                isDefault
                    ? Container(
                        height: 42,
                        width: 124,
                        child: Row(
                          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                          crossAxisAlignment: CrossAxisAlignment.center,
                          mainAxisSize: MainAxisSize.min,
                          children: <Widget>[
                            Icon(
                              Icons.star,
                              color: Colors.white,
                            ),
                            Text(
                              "Default",
                              style: TextStyle(
                                  color: Colors.white,
                                  fontWeight: FontWeight.w700,
                                  fontSize: 16),
                            )
                          ],
                        ),
                        color: primary,
                      )
                    : Container(),
                InkWell(
                  highlightColor: Colors.grey,
                  splashColor: Colors.grey,
                  onTap: () {},
                  child: Container(
                    height: 42,
                    width: 56,
                    child: Center(
                      child: Text(
                        "EDIT",
                        style: TextStyle(
                            color: primary,
                            fontWeight: FontWeight.w700,
                            fontSize: 16),
                      ),
                    ),
                  ),
                ),
              ],
            ),
          ),
          Container(
            padding: EdgeInsets.all(5),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.start,
              crossAxisAlignment: CrossAxisAlignment.start,
              mainAxisSize: MainAxisSize.max,
              children: <Widget>[
                Padding(
                  padding: EdgeInsets.symmetric(horizontal: 25),
                  child: Text(
                    name,
                    textAlign: TextAlign.left,
                    style: TextStyle(fontSize: 16, fontWeight: FontWeight.w700),
                  ),
                ),
                Padding(
                  padding: EdgeInsets.symmetric(horizontal: 25, vertical: 10),
                  child: Text(
                    address,
                    textAlign: TextAlign.left,
                    style: TextStyle(fontSize: 16, fontWeight: FontWeight.w400),
                  ),
                ),
                Padding(
                  padding: EdgeInsets.symmetric(horizontal: 25),
                  child: Text(
                    phone,
                    textAlign: TextAlign.left,
                    style: TextStyle(
                        fontSize: 16,
                        color: Colors.grey,
                        fontWeight: FontWeight.w400),
                  ),
                )
              ],
            ),
          ),
          Padding(
            padding: EdgeInsets.symmetric(horizontal: 48, vertical: 5),
            child: Divider(
              color: Colors.black54,
              height: 5,
            ),
          ),
          Padding(
            padding: EdgeInsets.symmetric(horizontal: 40),
            child: FlatButton(
              onPressed: () {},
              child: Center(
                child: Text(
                  "SELECT THIS ADDRESS",
                  style: TextStyle(
                      color: primary,
                      fontWeight: FontWeight.w700,
                      fontSize: 16),
                ),
              ),
            ),
          )
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: bg,
      appBar: AppBar(
        centerTitle: false,
        title: Text(
          "Address book",
          style: TextStyle(color: Colors.black),
        ),
        backgroundColor: Colors.white,
        leading: IconButton(
          icon: Icon(
            Icons.close,
            color: Colors.black,
          ),
        ),
      ),
      body: Container(
        child: ListView(
          children: <Widget>[
            listItemWidget(
                1,
                true,
                "MR SALAMI OKAY",
                "16, Bishop Kaale Alli dadas \n Lagos, Nigeria",
                "+234 81 026 4589"),
            listItemWidget(
                2,
                false,
                "MR SALAMI OKAY",
                "16, Bishop Kaale Alli dadas \n Lagos, Nigeria",
                "+234 81 026 4589"),
            listItemWidget(
                3,
                false,
                "MR SALAMI OKAY",
                "16, Bishop Kaale Alli dadas \n Lagos, Nigeria",
                "+234 81 026 4589")
          ],
        ),
      ),
      bottomNavigationBar: BottomAppBar(
        child: Container(
          height: 48,
          child: MaterialButton(
            height: 48,
            onPressed: () {},
            color: primary,
            child: Row(
              mainAxisSize: MainAxisSize.max,
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.center,
              children: <Widget>[
                Icon(
                  Icons.add_circle_outline,
                  color: Colors.white,
                ),
                Padding(
                  padding: EdgeInsets.symmetric(horizontal: 5),
                ),
                Text(
                  "ADD NEW ADDRESS",
                  style: TextStyle(color: Colors.white),
                )
              ],
            ),
          ),
        ),
      ),
    );
  }
}

class Checkout extends StatefulWidget {
  @override
  _CheckoutState createState() => _CheckoutState();
}

class _CheckoutState extends State<Checkout>
    with SingleTickerProviderStateMixin {
  final Color bg = Color(0xfff2f2f2);
  final Color primary = Color(0xffFF5F44);
  TabController tabController;

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    tabController = TabController(length: 3, vsync: this);
  }

  @override
  void dispose() {
    // TODO: implement dispose
    super.dispose();
    this.tabController.dispose();
  }

  Widget addressDetailWidget(
      int id, bool isDefault, String name, String address, String phone) {
    return Container(
      decoration: BoxDecoration(
        color: Colors.white,
      ),
      height: 116,
      width: double.maxFinite,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        mainAxisSize: MainAxisSize.max,
        mainAxisAlignment: MainAxisAlignment.start,
        children: <Widget>[
          Container(
            padding: EdgeInsets.all(5),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.start,
              crossAxisAlignment: CrossAxisAlignment.start,
              mainAxisSize: MainAxisSize.max,
              children: <Widget>[
                Padding(
                  padding: EdgeInsets.symmetric(horizontal: 25)
                      .add(EdgeInsets.only(top: 10)),
                  child: Text(
                    name,
                    textAlign: TextAlign.left,
                    style: TextStyle(fontSize: 16, fontWeight: FontWeight.w700),
                  ),
                ),
                Padding(
                  padding: EdgeInsets.symmetric(horizontal: 25, vertical: 5),
                  child: Text(
                    address,
                    textAlign: TextAlign.left,
                    style: TextStyle(fontSize: 16, fontWeight: FontWeight.w400),
                  ),
                ),
                Padding(
                  padding: EdgeInsets.symmetric(horizontal: 25),
                  child: Text(
                    phone,
                    textAlign: TextAlign.left,
                    style: TextStyle(
                        fontSize: 16,
                        color: Colors.grey,
                        fontWeight: FontWeight.w400),
                  ),
                )
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget deliverySelectorWidget() {
    return Column(
      children: <Widget>[
        Container(
          color: Colors.white,
          padding: EdgeInsets.symmetric(vertical: 10),
          margin: EdgeInsets.only(bottom: 10),
          child: RadioListTile(
            value: 1,
            onChanged: (int index) {},
            groupValue: 1,
            title: Text("Standard Delivery"),
            subtitle: Text(
                "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."),
          ),
        ),
        Container(
          color: Colors.white,
          padding: EdgeInsets.only(top: 10),
          margin: EdgeInsets.only(bottom: 10),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: <Widget>[
              RadioListTile(
                value: 2,
                onChanged: (int index) {},
                groupValue: 1,
                title: Text("Standard Delivery"),
                subtitle: Text(
                    "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."),
              ),
              Padding(
                padding: EdgeInsets.symmetric(horizontal: 48, vertical: 5),
                child: Divider(
                  color: Colors.black54,
                  height: 1,
                ),
              ),
              FlatButton(
                onPressed: () {},
                child: Center(
                  child: Text(
                    "SELECT THIS ADDRESS",
                    style: TextStyle(
                        color: primary,
                        fontWeight: FontWeight.w700,
                        fontSize: 16),
                  ),
                ),
              )
            ],
          ),
        )
      ],
    );
  }

  Widget subtotalWidget() {
    return Container(
      padding: EdgeInsets.all(10),
      child: Column(
        children: <Widget>[
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: <Widget>[Text("Subtotal"), Text("63000")],
          ),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: <Widget>[Text("Delivery"), Text("Free")],
          ),
          Padding(
            padding: EdgeInsets.symmetric(horizontal: 40, vertical: 10),
            child: Divider(
              color: Colors.black54,
              height: 5,
            ),
          ),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: <Widget>[Text("Total"), Text("63000")],
          ),
        ],
      ),
    );
  }

  Widget deliveryView() {
    return Container(
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        mainAxisSize: MainAxisSize.min,
        children: <Widget>[
          Row(
              mainAxisSize: MainAxisSize.max,
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: <Widget>[
                Padding(
                  padding: EdgeInsets.only(left: 10),
                  child: Text("ADDRESS DETAILS"),
                ),
                MaterialButton(
                    height: 24,
                    onPressed: () {},
                    child: Text(
                      "CHANGE",
                      style: TextStyle(color: primary),
                    )),
              ]),
          addressDetailWidget(
              1,
              true,
              "MR SALAMI OKAY",
              "16, Bishop Kaale Alli dadas \n Lagos, Nigeria",
              "+234 81 026 4589"),
          Container(
            height: 36,
            padding: EdgeInsets.only(left: 10),
            child: Align(
              child: Text("DELIVERY METHOD"),
              alignment: Alignment(-1, 0),
            ),
          ),
          deliverySelectorWidget(),
          subtotalWidget()
        ],
      ),
    );
  }

  Widget paymentsView() {
    return Container(
      child: Column(
        children: <Widget>[
          Row(
              mainAxisSize: MainAxisSize.max,
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: <Widget>[
                Padding(
                  padding: EdgeInsets.only(left: 10),
                  child: Text("SELECT A PAYMENT METHOD"),
                ),
                MaterialButton(
                    height: 24,
                    onPressed: () {},
                    child: Text(
                      "CHANGE",
                      style: TextStyle(color: primary),
                    )),
              ]),
          Container(
            color: Colors.white,
            padding: EdgeInsets.symmetric(vertical: 10),
            margin: EdgeInsets.only(bottom: 10),
            child: RadioListTile(
              value: 1,
              onChanged: (int index) {},
              groupValue: 1,
              title: Text("Cards"),
              subtitle: Container(
                child: Column(
                  children: <Widget>[
                    Row(
                      children: <Widget>[
                        Image.network("https://via.placeholder.com/72x48"),
                        Padding(padding: EdgeInsets.symmetric(horizontal: 5)),
                        Image.network("https://via.placeholder.com/72x48"),
                      ],
                    ),
                    Text("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. "),
                  ],
                ),
              ),

              isThreeLine: true,
            ),
          ),
          Container(
            color: Colors.white,
            padding: EdgeInsets.symmetric(vertical: 10),
            margin: EdgeInsets.only(bottom: 10),
            child: RadioListTile(
              value: 2,
              onChanged: (int index) {},
              groupValue: 1,
              title: Text("Pay on Delivery"),
            ),
          ),
          Spacer(),
          subtotalWidget()

        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: bg,
      appBar: AppBar(
        centerTitle: false,
        title: Text(
          "Checkout",
          style: TextStyle(color: Colors.black),
        ),
        backgroundColor: Colors.white,
        leading: IconButton(
          icon: Icon(
            Icons.close,
            color: Colors.black,
          ),
        ),
        bottom: TabBar(
          indicatorSize: TabBarIndicatorSize.tab,
          unselectedLabelColor: Colors.black87,
          indicator: new BubbleTabIndicator(
            indicatorHeight: 36.0,
            indicatorColor: primary,
            tabBarIndicatorSize: TabBarIndicatorSize.tab,
          ),
          controller: tabController,
          tabs: <Widget>[
            Tab(
              text: "DELIVERY",
            ),
            Tab(
              text: "PAYMENTS",
            ),
            Tab(
              text: "SUMMARY",
            )
          ],
        ),
      ),
      body: TabBarView(
        physics: NeverScrollableScrollPhysics(),
        controller: tabController,
        children: <Widget>[
          deliveryView(),
          paymentsView(),
          Container(
            child: Icon(Icons.home),
          )
        ],
      ),
      bottomNavigationBar: BottomAppBar(
        elevation: 0,
        child: Container(
          color: bg,
          height: 56,
          child: Padding(
            padding: EdgeInsets.all(5),
            child: MaterialButton(
              height: 48,
              onPressed: () {},
              color: primary,
              child: Row(
                mainAxisSize: MainAxisSize.max,
                mainAxisAlignment: MainAxisAlignment.center,
                crossAxisAlignment: CrossAxisAlignment.center,
                children: <Widget>[
                  Icon(
                    Icons.add_circle_outline,
                    color: Colors.white,
                  ),
                  Padding(
                    padding: EdgeInsets.symmetric(horizontal: 5),
                  ),
                  Text(
                    "ADD NEW ADDRESS",
                    style: TextStyle(color: Colors.white),
                  )
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}