Which of the following methods updates a ListView when an element is added to the data set?
A) notify( )
B) notifyAll( )
C) notifyDataSetChanged( )
D) notifyDataSetInvalidate( )

Question

Quizplus · Accepted Answer

notifyDataSetChanged() is the method used to notify the ListView that the underlying dataset has changed and that it needs to update itself. This will cause the ListView to re-draw itself and display any new elements that were added to the dataset. notify() and notifyAll() are not methods that are used for updating a ListView. notifyDataSetInvalidate() is a method that is used to indicate that the entire dataset has become invalid and that the ListView should be reloaded, which is not necessary when a single element is added.

Which of the Following Methods Updates a ListView When an Element