A handle to the location of a widget in the widget tree . This class presents a set of methods that can be used from StatelessWidget. build methods and from methods on State objects. BuildContext objects are passed to WidgetBuilder functions (such as StatelessWidget. build), and are available from the State.
Read moreWhat is build () in Flutter?
build method Null safety Describes the part of the user interface represented by this widget . The framework calls this method when this widget is inserted into the tree in a given BuildContext and when the dependencies of this widget change (e.g., an InheritedWidget referenced by this widget changes).
Read moreHow many types of builders are there in Flutter?
Flutter Design Patterns: 18 — Builder.
Read moreWhat is the use of builder widget in Flutter?
A builder function is a Flutter design pattern in which widgets provide a callback interface to the widget tree with dynamic (often layout-specific) parameters .
Read moreWhat is 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).
Read moreWhat are layout widgets in Flutter?
Single-child layout widgets Align . A widget that aligns its child within itself and optionally sizes itself based on the child’s size . AspectRatio. A widget that attempts to size the child to a specific aspect ratio.
Read moreWhat is layout Flutter?
In Flutter, almost everything is a widget—even layout models are widgets . The images, icons, and text that you see in a Flutter app are all widgets. But things you don’t see are also widgets, such as the rows, columns, and grids that arrange, constrain, and align the visible widgets.
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