A stateful widget is implemented by two classes: a subclass of StatefulWidget and a subclass of State . The state class contains the widget’s mutable state and the widget’s build() method. When the widget’s state changes, the state object calls setState() , telling the framework to redraw the widget.
Read moreWhen should you use a stateful widget instead of a stateless widget?
Stateless widget is useful when the part of the user interface you are describing does not depend on anything other than the configuration information and the BuildContext whereas a Stateful widget is useful when the part of the user interface you are describing can change dynamically .19 Mar 2021
Read moreHow do you set a state in flutter?
setState method Null safety Notify the framework that the internal state of this object has changed. Whenever you change the internal state of a State object, make the change in a function that you pass to setState: setState(() { _myState = newValue; }); The provided callback is immediately called synchronously.
Read moreWhat is MainAxisSize min in Flutter?
MainAxisSize.min says, squeeze the rows together and leave unused space (100) at the end (or beginning or both ends depending on alignment)
Read moreHow do you use crossAxisAlignment in Flutter?
Using mainAxisAlignment in a Row lets you align the row’s children horizontally (e.g. left, right). The cross axis to a Row ‘s main axis is vertical. So using crossAxisAlignment in a Row lets you define, how its children are aligned vertically . In a Column , it’s the opposite.19 Ara 2018
Read moreWhat is main axis alignment Flutter?
MainAxisAlignment is a property of Column widget. It is used to arrange children widgets into vertically format according to given axis . Today we would use the Column widget and make children widget into single column format in flutter.
Read moreWhy is state in Flutter?
State is information that (1) can be read synchronously when the widget is built and (2) might change during the lifetime of the widget. It is the responsibility of the widget implementer to ensure that the State is promptly notified when such state changes, using State. setState.
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