Flutter Container example

To size a Container that resides inside another Container, you need to set the alignment property of the parent Container . Otherwise, the child Container won’t care about the width and height you set for it and will expand to its parent’s constraints.

A constraint is just a set of 4 doubles: a minimum and maximum width, and a minimum and maximum height . Then the widget goes through its own list of children. One by one, the widget tells its children what their constraints are (which can be different for each child), and then asks each child what size it wants to be.

A constraint is just a set of 4 doubles: a minimum and maximum width, and a minimum and maximum height . Then the widget goes through its own list of children. One by one, the widget tells its children what their constraints are (which can be different for each child), and then asks each child what size it wants to be.

In Flutter, to vertically center a child widget inside a Container, you can wrap the child widget with Column and add mainAxisAlignment: MainAxisAlignment. center to it .

In Flutter, to vertically center a child widget inside a Container, you can wrap the child widget with Column and add mainAxisAlignment: MainAxisAlignment. center to it .