A RenderFlex overflowed by 729 pixels on the bottom. in SingleChildScrollView

Question

A RenderFlex overflowed by 676 pixels on the bottom. in SingleChildScrollView

Widget dashboard(context){
    return AnimatedPositioned(
      duration: duration,
      top:0,
      bottom:0,
      left:isCollapsed ? 0 : 0.6 * screenWidth,
      right:isCollapsed ? 0 : -0.2 * screenWidth,
      child: ScaleTransition(
        scale: _scaleAnimation,
        child: Material(
          animationDuration: duration ,
          borderRadius: BorderRadius.all(
            Radius.circular(40),
          ),
          elevation: 8,
          color:backgroundColor,
          child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
              Container(
                padding: const EdgeInsets.only(left: 16, right: 16, top: 48),
                child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    mainAxisSize: MainAxisSize.max,
                    children:[
                      InkWell(
                        child: Icon(
                            Icons.menu,
                            color: Colors.white
                        ),
                        onTap: (){
                          setState(() {
                            if(isCollapsed)
                              _controller.forward();
                            else
                              _controller.reverse();

                            isCollapsed = !isCollapsed;
                          });
                        },
                      ),
                      Text(
                        " Técnico",
                        style: TextStyle(
                          fontSize: 24,
                          color: Colors.white,
                        ),
                      ),
                      Icon(
                        Icons.settings,
                        color: Colors.white,
                      ),
                    ]),
              ),
              Container(
                  child: SingleChildScrollView(
                    scrollDirection: Axis.vertical,
                    physics: ClampingScrollPhysics(),
                    child: Column(
                      children: <Widget>[
                      SizedBox(
                        height: 5,
                      ),
                      SizedBox(
                        height:20 ,
                      ),
                      Text("Chamados",
                      style: TextStyle(
                        color: Colors.white,
                        fontSize: 20,
                      ) ,
                      ),
                      SizedBox(
                        height:5 ,
                      ),
                      ListView.separated(
                          shrinkWrap: true,
                          itemBuilder: (context,index){
                        return ListTile(
                          title: Text("Falta de Sinal"),
                          subtitle: Text("João"),
                          trailing: Text("20mb"),
                        );
                      }, separatorBuilder: (context,index){
                        return Divider(
                          height: 16,
                        );
                      }, itemCount: 16),
                    ],
                    ),
                  ),
              ),
          ],
          ),
        ),
      ),
    );
  }

Does this answer your question? [Center widget vertically inside a SingleChildScrollView](https://stackoverflow.com/questions/53398476/center-widget-vertically-inside-a-singlechildscrollview) — live-love, Jun 01 '20 at 23:18

score 6 · Answer 1 · edited May 10 '21 at 02:53

6

if you use SingleChildScrollView inside column or row then wrap that with Expanded Widget.

e.g. Column(
     childreen[
        Expanded(
            child : SingleChildScrollView(
                 // your code ...
          ),                  
       ]),

Or you can provide height to the container.

  e.g. -> Container(
              height : 300.0,
              child : SingleChildScrollView(
                // your code ...              
                 ),
              ),

Happy Coding... :)

edited May 10 '21 at 02:53

answered Oct 22 '19 at 02:31

Sonu Saini

1,814
9
16

Can't do #1 if any parent widget is a Stack – chemturion May 12 '22 at 21:08

chunhunghan · Accepted Answer · 2019-10-22T03:51:46.100

Wrap ListView.separated with Container and add constraints, set maxHeight works, you can see picture below

code snippet

Container(
              constraints: BoxConstraints(
                maxHeight: 300.0,
              ),
              child: ListView.separated(
                  shrinkWrap: true,
                  itemBuilder: (context, index) {
                    return ListTile(
                      title: Text("Falta de Sinal"),
                      subtitle: Text("João"),
                      trailing: Text("20mb"),
                    );
                  },
                  separatorBuilder: (context, index) {
                    return Divider(
                      height: 16,
                    );
                  },
                  itemCount: 16),
            ),

full test code

    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(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            dashboard(context),
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.display1,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }

  Widget dashboard(context) {
    return Container(
      child: SingleChildScrollView(
        scrollDirection: Axis.vertical,
        physics: ClampingScrollPhysics(),
        child: Column(
          children: <Widget>[
            SizedBox(
              height: 5,
            ),
            SizedBox(
              height: 20,
            ),
            Text(
              "Chamados",
              style: TextStyle(
                color: Colors.black,
                fontSize: 20,
              ),
            ),
            SizedBox(
              height: 5,
            ),
            Container(
              constraints: BoxConstraints(
                maxHeight: 300.0,
              ),
              child: ListView.separated(
                  shrinkWrap: true,
                  itemBuilder: (context, index) {
                    return ListTile(
                      title: Text("Falta de Sinal"),
                      subtitle: Text("João"),
                      trailing: Text("20mb"),
                    );
                  },
                  separatorBuilder: (context, index) {
                    return Divider(
                      height: 16,
                    );
                  },
                  itemCount: 16),
            ),
          ],
        ),
      ),
    );
  }
}

It depend on your layout. you can use MediaQuery.of(context).size.height / 3 to get relative height, reference this https://medium.com/flutter-community/a-guide-to-using-screensize-in-flutter-a-more-readable-approach-901e82556195 — chunhunghan, Oct 23 '19 at 00:44

score 0 · Answer 3 · answered Jul 24 '21 at 15:56

0

Adding height is a good option, But u should go with the Expanded inside column

answered Jul 24 '21 at 15:56

aayush bajaj

13
4

score 0 · Answer 4 · answered Dec 13 '21 at 12:55

I am answering it because Nobody mention why do we get this ,

So , this is usually caused by the contents being too big for the RenderFlex . By applying a flex factor (e.g. using an Expanded widget or Flexibel which is also kind of Expanded widget) to force the children of the Widgets RenderFlex to fit within the available space instead of being sized to their natural size. You can visit even this for more clearity Flutter (Dart): Exceptions caused by rendering / A RenderFlex overflowed. Also this https://docs.flutter.dev/testing/common-errors hope this is helpful.

score -1 · Answer 5 · answered Apr 19 '21 at 17:24

-1

inside your column use mainAxisSize,will prevent the issue Column( mainAxisSize: MainAxisSize.min, children: [ ) ], ),

answered Apr 19 '21 at 17:24

Germanus Xavier

33
2

score -1 · Answer 6 · edited Apr 20 '21 at 08:29

-1

Column( mainAxisSize: MainAxisSize.min, children: <Widget>[ Text( filename, style: TextStyle( color: dsecondaryColor, fontWeight: FontWeight.bold), ) ], ),

edited Apr 20 '21 at 08:29

Oleksii Kyslytsyn

2,458
2
27
43

answered Apr 19 '21 at 17:34

Germanus Xavier

33
2

3

Welcome to Stack Overflow. Please read [answer]. – ChrisGPT was on strike Apr 20 '21 at 00:29

A RenderFlex overflowed by 729 pixels on the bottom. in SingleChildScrollView

6 Answers6