What is expanded widget?

What is expanded widget?

A widget that expands a child of a Row, Column, or Flex so that the child fills the available space. Using an Expanded widget makes a child of a Row, Column, or Flex expand to fill the available space along the main axis (e.g., horizontally for a Row or vertically for a Column).

What is the difference between expanded and flexible widgets?

So, if the child in flexible knows its height (in Column and width in Row) then it will take the mentioned height. But if the height is not mentioned then it will take the remaining height and it will act like an expanded widget. And expanded widget will always take remaining height (or width).

Where do you use the expanded flutter?

Expanded widget in flutter comes in handy when we want a child widget or children widgets to take all the available space along the main-axis (for Row the main axis is horizontal & vertical for Column). Expanded widget can be taken as the child of Row, Column, and Flex.

What is spacer in flutter?

Spacer creates an adjustable, empty spacer that can be used to tune the spacing between widgets in a Flex container, like Row or Column. The Spacer widget will take up any available space, so setting the Flex. mainAxisAlignment on a flex container that contains a Spacer to MainAxisAlignment.

What is SizedBox in flutter?

SizedBox is a built-in widget in flutter SDK. It is a simple box with a specified size. It can be used to set size constraints to the child widget, put an empty SizedBox between the two widgets to get some space in between, or something else. It is somewhat similar to a Container widget with fewer properties.

How do you make expansion tiles in flutter?

Create a new dart file called expansion_title_demo. dart inside the lib folder. In this screen, we will create a list with the help of a list view builder in which the expansion tile widget will be used and initialize the list data into the expansion tile widget. Let’s understand it with the help of a reference.

How do you expand and collapse in flutter?

To expand/collapse views in Flutter we can use the Expansion tile widget. It is quite easy and interesting. So, now what is Expansion Tile? – A single line list tile with a trailing button that expands or collapses the tile to reveal or hide the children.

What is flexible and expanded flutter?

Flexible is a built-in widget in flutter which controls how a child of base flex widgets that are Row, Column, and Flex will fill the space available to it. The Expanded widget in flutter is shorthand of Flexible with the default fit of FlexFit.

What is Stack widget in Flutter?

The stack is a widget in Flutter. It contains a list of widgets and places them on top of each other. And it places their children on top of each other like a stack of books. In other words, stack developers would overlap multiple widgets on one screen. As you can add different images or colors using containers in it.

How do I add a space between widgets?

To provide space in the widgets, we can use padding property, as padding adds space to the outermost part of the widget. In order to add padding, assign the values to padx and pady.

What is the difference between container and SizedBox?

The main advantage seems to be that SizedBox can be const and won’t even create a new instance during runtime. Thanks to the magic of open source, you don’t have to guess too much. Container is basically just a convenience widget which sometimes saves you to nest 4 other widgets.