Flutter commonly uses keys when it needs to uniquely identify specific widgets within a collection . Using keys also helps Flutter preserve the state of StatefulWidget s while they’re being replaced with other widgets or just moved in the widget tree.
Read moreWhy do we need widgets in Flutter?
Flutter widgets are built using a modern framework that takes inspiration from React. The central idea is that you build your UI out of widgets. Widgets describe what their view should look like given their current configuration and state .
Read moreWhat is the use of stateful widget in flutter?
Stateful Widgets are the ones that change its properties during run-time . They are dynamic i.e., they are mutable and can be drawn multiple times within its lifetime. It can change its appearance in response to events triggered by user interactions or when it receives data.
Read moreWhen we use a stateful widget which class we need to extend?
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 moreWhat are the widget types in Flutter?
There are broadly two types of widgets in Flutter. State-full Widgets and Stateless Widgets . The names are self-explanatory.
Read moreWhat is the widget in Flutter?
Widgets are the central class hierarchy in the Flutter framework . A widget is an immutable description of part of a user interface. Widgets can be inflated into elements, which manage the underlying render tree. Widgets themselves have no mutable state (all their fields must be final).
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