How to Solve ʺHorizontal viewport was given unbounded heightʺ Error in Flutter
Introduction
The “Horizontal viewport was given unbounded height” error in Flutter is a common issue that developers face when building responsive layouts. This error occurs when a widget with unbounded height is used inside a horizontal viewport. In this blog post, we will discuss the causes of this error and provide solutions to fix it.
Understanding the Error
The “Horizontal viewport was given unbounded height” error is caused by using a widget with unbounded height inside a horizontal viewport. This can happen when using widgets like `ListView`, `SingleChildScrollView`, or `Column` inside a `Row` or `Flex` widget. To fix this error, we need to provide a bounded height to the widget.
Providing a Bounded Height
To provide a bounded height to a widget, we can use the `SizedBox` or `Container` widget. For example, if we are using a `ListView` inside a `Row`, we can wrap the `ListView` with a `SizedBox` and provide a fixed height.
“`dart
Row(
children: [
SizedBox(
height: 200,
child: ListView(
children: [
// list items
],
),
),
],
)
“`
Using Expanded or Flexible Widgets
Another way to fix this error is to use `Expanded` or `Flexible` widgets. These widgets can be used to divide the available space among multiple widgets. For example, if we are using two `ListView` widgets inside a `Row`, we can use `Expanded` widgets to divide the space equally.
“`dart
Row(
children: [
Expanded(
child: ListView(
children: [
// list items
],
),
),
Expanded(
child: ListView(
children: [
// list items
],
),
),
],
)
“`
Wrapping with a Container
We can also wrap the widget with a `Container` and provide a fixed height. This can be useful when we want to add additional styles to the widget.
“`dart
Row(
children: [
Container(
height: 200,
child: ListView(
children: [
// list items
],
),
),
],
)
“`
Conclusion
The “Horizontal viewport was given unbounded height” error in Flutter can be fixed by providing a bounded height to the widget. We can use `SizedBox`, `Container`, `Expanded`, or `Flexible` widgets to provide a bounded height. By using these widgets, we can create responsive layouts and avoid this common error.
FAQ
1. What causes the “Horizontal viewport was given unbounded height” error in Flutter?
The error is caused by using a widget with unbounded height inside a horizontal viewport.
2. How can I fix the “Horizontal viewport was given unbounded height” error in Flutter?
We can fix the error by providing a bounded height to the widget using `SizedBox`, `Container`, `Expanded`, or `Flexible` widgets.
3. Can I use `ListView` inside a `Row` widget in Flutter?
Yes, we can use `ListView` inside a `Row` widget, but we need to provide a bounded height to the `ListView` widget.
4. What is the difference between `SizedBox` and `Container` widgets in Flutter?
Both `SizedBox` and `Container` widgets can be used to provide a bounded height to a widget, but `Container` widget provides additional styles and features.
5. How can I divide the available space among multiple widgets in Flutter?
We can use `Expanded` or `Flexible` widgets to divide the available space among multiple widgets in Flutter.
