Bottom overflowed by pixels when keyboard appears

Why This Happens

In Flutter, when the keyboard appears, the Scaffold resizes its body to accommodate it. If the body contains a Column with fixed-height children, this resize can cause overflow. Set resizeToAvoidBottomInset to false or wrap content in SingleChildScrollView.

The Problem

Scaffold(
  body: Column(
    children: [
      SizedBox(height: 200),
      TextField(), // Keyboard causes overflow
      SizedBox(height: 400),
    ],
  ),
)

The Fix

Scaffold(
  body: SingleChildScrollView(
    child: Column(
      children: [
        SizedBox(height: 200),
        TextField(),
        SizedBox(height: 400),
      ],
    ),
  ),
)

Step-by-Step Fix

1. 1

   Identify the error

   Look at the overflow error that appears only when the keyboard is shown. This tells you the layout does not accommodate the keyboard.

2. 2

   Find the cause

   Check if the Scaffold body has a non-scrollable Column with fixed heights that exceed the reduced screen space when the keyboard is open.

3. 3

   Apply the fix

   Wrap the Column in SingleChildScrollView, or set Scaffold's resizeToAvoidBottomInset to false if scrolling is not desired.