What is life cycle of Flutter?

A widget is either stateful or stateless. If a widget can change—when a user interacts with it, for example—it’s stateful. A stateless widget never changes . Icon , IconButton , and Text are examples of stateless widgets.

Stateless widget overrides the build() method and returns a widget . For example, we use Text or the Icon is our flutter application where the state of the widget does not change in the runtime. It is used when the UI depends on the information within the object itself.

The tldr version is that State objects are long lived, but StatefulWidget s (and all Widget subclasses) are thrown away and rebuilt whenever configuration changes . It’s very inexpensive ie cheap for Flutter to rebuild a mutable widget.

Lifecycle of Flutter App, is the demonstration of how the app will change its State . It helps in understanding the concept behind the smooth flow of our apps. Flutter has majorly two types of widgets i.e. , Stateless and Stateful Widget.