ListView constructor

ListView({Key key, Axis scrollDirection: Axis.vertical, bool reverse: false, ScrollController controller, bool primary, ScrollPhysics physics, bool shrinkWrap: false, EdgeInsetsGeometry padding, double itemExtent, bool addAutomaticKeepAlives: true, bool addRepaintBoundaries: true, bool addSemanticIndexes: true, double cacheExtent, List<Widget> children: const [], int semanticChildCount, DragStartBehavior dragStartBehavior: DragStartBehavior.start })

Creates a scrollable, linear array of widgets from an explicit List.

This constructor is appropriate for list views with a small number of children because constructing the List requires doing work for every child that could possibly be displayed in the list view instead of just those children that are actually visible.

It is usually more efficient to create children on demand using new ListView.builder.

The addAutomaticKeepAlives argument corresponds to the SliverChildListDelegate.addAutomaticKeepAlives property. The addRepaintBoundaries argument corresponds to the SliverChildListDelegate.addRepaintBoundaries property. The addSemanticIndexes argument corresponds to the SliverChildListDelegate.addSemanticIndexes property. None may be null.


  Key key,
  Axis scrollDirection = Axis.vertical,
  bool reverse = false,
  ScrollController controller,
  bool primary,
  ScrollPhysics physics,
  bool shrinkWrap = false,
  EdgeInsetsGeometry padding,
  bool addAutomaticKeepAlives = true,
  bool addRepaintBoundaries = true,
  bool addSemanticIndexes = true,
  double cacheExtent,
  List<Widget> children = const <Widget>[],
  int semanticChildCount,
  DragStartBehavior dragStartBehavior = DragStartBehavior.start,
}) : childrenDelegate = SliverChildListDelegate(
       addAutomaticKeepAlives: addAutomaticKeepAlives,
       addRepaintBoundaries: addRepaintBoundaries,
       addSemanticIndexes: addSemanticIndexes,
       key: key,
       scrollDirection: scrollDirection,
       reverse: reverse,
       controller: controller,
       primary: primary,
       physics: physics,
       shrinkWrap: shrinkWrap,
       padding: padding,
       cacheExtent: cacheExtent,
       semanticChildCount: semanticChildCount ?? children.length,
       dragStartBehavior: dragStartBehavior,