Action constant returned by DragEvent.Action: Signals the start of a drag and drop operation. The View should return true from its View.OnDragEvent(DragEvent) handler method or Android.Views.View.IOnDragListener.OnDrag(View, Android.Views.DragEvent) listener if it can accept a drop. The onDragEvent() or onDrag() methods usually inspect the metadata from DragEvent.ClipDescription to determine if they can accept the data contained in this drag. For an operation that doesn't represent data transfer, these methods may perform other actions to determine whether or not the View should accept the drag. If the View wants to indicate that it is a valid drop target, it can also react by changing its appearance.

A View only receives further drag events if it returns true in response to ACTION_DRAG_STARTED.