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Flutter – Pixels Overflow Error while Launching Keyboard

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  • Last Updated : 31 Jan, 2022
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There is a very common pixel overflow error in Flutter whenever there are too many widgets in a Column and they are not able to display completely when Keyboard is opened, then these kinds of Pixel Overflow errors are received. Example :

The code for this UI is :

Dart




import 'package:flutter/material.dart';
  
import 'components.dart';
  
void main() {
  runApp(const MyApp());
}
  
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            mainAxisSize: MainAxisSize.max,
            children: [
              GFGLogo(),
              SizedBox(height: 50),
              MyTextField(label: "username"),
              SizedBox(height: 15),
              MyTextField(label: "password"),
              SizedBox(height: 15),
              MyTextField(label: "confirm password"),
              SizedBox(height: 50),
              MyButton(),
            ],
          ),
        ),
      ),
    );
  }
}


Solution :

The solution to resolve this overflow error is to make your entire widget or in our case the Column scrollable. We can do that by wrapping our Column inside a SingleChildScrollView. Also, wrap the SingleChildScrollView with Center so that the entire UI is centered. After that, it will all work just fine and there will be no overflow errors.

Dart




import 'package:flutter/material.dart';
  
import 'components.dart';
  
void main() {
  runApp(const MyApp());
}
  
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Center(
            child: SingleChildScrollView(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                mainAxisSize: MainAxisSize.max,
                children: [
                  GFGLogo(),
                  SizedBox(height: 50),
                  MyTextField(label: "username"),
                  SizedBox(height: 15),
                  MyTextField(label: "password"),
                  SizedBox(height: 15),
                  MyTextField(label: "confirm password"),
                  SizedBox(height: 50),
                  MyButton(),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}


Output:


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