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Expanded Class in Flutter
In Flutter, we can use the Expanded class to resize widgets dynamically within a Row, Column, or Flex container. The Expanded widget allows us to specify how much space a child widget should occupy relative to the other widgets in the container. In this blog post, we will explore how to use the Expanded class in Flutter with examples.
Using the Expanded class
The Expanded class in Flutter allows us to resize widgets dynamically within a Row, Column, or Flex container. We can use the Expanded widget to specify how much space a child widget should occupy relative to the other widgets in the container. Here is an example of how to use the Expanded widget:
Row(
children: <Widget>[
Expanded(
child: Text('Widget 1'),
),
Expanded(
child: Text('Widget 2'),
),
Expanded(
child: Text('Widget 3'),
),
],
)ā
In this example, we use the Row widget to create a horizontal container for our widgets. We then use the Expanded widget to specify that each child widget should occupy an equal amount of space within the container. The Text widgets will resize dynamically based on the available space in the container.
We can also use the flex property of the Expanded widget to specify a ratio for how much space each child widget should occupy relative to the other widgets in the container. Here is an example of how to use the flex property:
Row(
children: <Widget>[
Expanded(
flex: 2,
child: Text('Widget 1'),
),
Expanded(
flex: 3,
child: Text('Widget 2'),
),
Expanded(
flex: 1,
child: Text('Widget 3'),
),
],
)ā
In this example, we use the flex property to specify a ratio of 2:3:1 for how much space each child widget should occupy. The Text widgets will resize dynamically based on the available space in the container, but the widget with flex: 3 will occupy more space than the widgets with flex: 2 and flex: 1.
Conclusion
we explored how to use the Expanded class in Flutter to resize widgets dynamically within a Row, Column, or Flex container. We learned how to use the Expanded widget to specify how much space a child widget should occupy relative to the other widgets in the container and how to use the flex property to specify a ratio for how much space each child widget should occupy. With the Expanded widget, we can create flexible and dynamic layouts in our Flutter applications.