Flutter RenderFlex children have non-zero flex but incoming height constraints are unbounded. error with 134 pixel?

Question

Here is my code in android studio(Windows system)

How to solve this, I have used singlechildscrollview but getting RenderFlex children have non-zero

error......? 

also I have wrapped with widget but same issue........?

Below is my code:

     void main() {
              runApp(MyApp());
            }
            class MyApp extends StatelessWidget {
              // This widget is the root of your application.
              @override
              Widget build(BuildContext context) {
                return MaterialApp(
                  debugShowCheckedModeBanner: false,
                  theme: ThemeData(
                    fontFamily: 'ubuntu',
                  ),
                  home: MyHomePage(),
                  routes: {
                    '/MainPage' : (context)=>MainPage(),
                  },
                );
              }
            }
            class MyHomePage extends StatefulWidget {
              @override
              _MyHomePageState createState() => _MyHomePageState();
            }
            
            class _MyHomePageState extends State<MyHomePage> {
              @override
              Widget build(BuildContext context) {
                return Scaffold(
                  resizeToAvoidBottomInset: false,
                  backgroundColor: purple,
                  body: SingleChildScrollView(
                    child: Column(
                      children: [
                        Container(
                          width: 100,
                          height: 50,
                          margin: EdgeInsets.only(top: 40),
                          decoration: BoxDecoration(
                              image: DecorationImage(
                                  image: AssetImage('asset/image/logo.png')
                              )
                          ),
                        ),
                        SizedBox(height: 30,),
                        Text("Clean Home\nClean Life", style: TextStyle(
                            fontSize: 40,
                            color: Colors.white,
                            fontWeight: FontWeight.w900
                        ),textAlign: TextAlign.center,),
                        SizedBox(height: 30,),
                        Text("Book Cleans At The Comfort \nOf Your Home", style: TextStyle(
                          fontSize: 18,
                          color: Colors.white,
                          fontWeight: FontWeight.w400,
            
                        ), textAlign: TextAlign.center,),
                        SizedBox(height: 60,),
                        Container(
                          height: 350,
                          width: MediaQuery.of(context).size.width,
                          decoration: BoxDecoration(
                              image: DecorationImage(
                                  image: AssetImage('asset/image/splash.png'),
                                  fit: BoxFit.cover
                              )
                          ),
                        ),
                        Expanded(
                          child: Container(),
                        ),
                        Row(
                          mainAxisAlignment: MainAxisAlignment.end,
                          children: [
                            InkWell(
                              onTap: openMainPage,
                              child: Container(
                                padding: EdgeInsets.symmetric(horizontal: 60, vertical: 30),
                                decoration: BoxDecoration(
                                    borderRadius: BorderRadius.only(topLeft: Radius.circular(20)),
                                    color: Colors.white
                                ),
                                child: Text('Continue..', style: TextStyle(
                                    fontSize: 17,
                                    fontWeight: FontWeight.w600,
                                    color: purple
                                ),),
                              ),
                            )
                          ],
                        )
                      ],
                    ),
                  ),
                );
              }
            
              void openMainPage()
              {
                Navigator.pushNamed(context, '/MainPage');
              }
            }
........

Answer 1

To make content scrollable it must overflow the viewport height. As you use Expanded before Row so your Column is expanded to the maximum height and there is nothing to scroll. If you remove Expanded from Container and set for thos Container height (eg.500.0) than your content will overflow the view port and become scrollable.

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        fontFamily: 'ubuntu',
      ),
      home: MyHomePage(),
      // routes: {
      //   '/MainPage' : (context)=>MainPage(),
      // },
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      resizeToAvoidBottomInset: false,
      backgroundColor: Colors.purple,
      body: SingleChildScrollView(
        child: Column(
          children: [
            Container(
              width: 100,
              height: 50,
              margin: EdgeInsets.only(top: 40),
              decoration: BoxDecoration(
                  image: DecorationImage(
                      image: NetworkImage(
                          'https://2.bp.blogspot.com/-3VnKmSv5FXg/XCc1YFehs-I/AAAAAAAAPt4/zxnpIVoYSvQFGtIVeNqTILDsCaIg8Ql-wCLcBGAs/s1600/Mirillis%2B-%2BSplash%2BPremium%2BFull%2Bversion.png'))),
            ),
            SizedBox(
              height: 30,
            ),
            Text(
              "Clean Home\nClean Life",
              style: TextStyle(
                  fontSize: 40,
                  color: Colors.white,
                  fontWeight: FontWeight.w900),
              textAlign: TextAlign.center,
            ),
            SizedBox(
              height: 30,
            ),
            Text(
              "Book Cleans At The Comfort \nOf Your Home",
              style: TextStyle(
                fontSize: 18,
                color: Colors.white,
                fontWeight: FontWeight.w400,
              ),
              textAlign: TextAlign.center,
            ),
            SizedBox(
              height: 60,
            ),
            Container(
              height: 350,
              width: MediaQuery.of(context).size.width,
              decoration: BoxDecoration(
                  image: DecorationImage(
                      image: NetworkImage(
                          'https://2.bp.blogspot.com/-3VnKmSv5FXg/XCc1YFehs-I/AAAAAAAAPt4/zxnpIVoYSvQFGtIVeNqTILDsCaIg8Ql-wCLcBGAs/s1600/Mirillis%2B-%2BSplash%2BPremium%2BFull%2Bversion.png'),
                      fit: BoxFit.cover)),
            ),
            //! Comment this
            // Expanded(
            //   child: Container(),
            // ),
            //! Add height here
            Container(
              height: 500,
            ),
            Row(
              mainAxisAlignment: MainAxisAlignment.end,
              children: [
                InkWell(
                  onTap: openMainPage,
                  child: Container(
                    padding: EdgeInsets.symmetric(horizontal: 60, vertical: 30),
                    decoration: BoxDecoration(
                        borderRadius:
                            BorderRadius.only(topLeft: Radius.circular(20)),
                        color: Colors.white),
                    child: Text(
                      'Continue..',
                      style: TextStyle(
                          fontSize: 17,
                          fontWeight: FontWeight.w600,
                          color: Colors.purple),
                    ),
                  ),
                )
              ],
            )
          ],
        ),
      ),
    );
  }

  void openMainPage() {
    Navigator.pushNamed(context, '/MainPage');
  }
}

PS I replaced AssetImage with NetworkImage because I have no your images.