Return the number of views available.
This method may be called by the ViewPager to obtain a title string to describe
the specified page.
This method should be called by the application if the data backing this adapter
has changed and ass
Called when the host view is attempting to determine if an item's position has
changed. Returns #POS
Create the page for the given position. The adapter is responsible for adding
the view to the contai
Called to inform the adapter of which item is currently considered to be the
"primary", that is the
Called when the a change in the shown pages has been completed. At this point
you must ensure that a
Called when a change in the shown pages is going to start being made.
Restore any instance state associated with this adapter and its pages that was
previously saved by #
Remove a page for the given position. The adapter is responsible for removing
the view from its cont
Determines whether a page View is associated with a specific key object as
returned by #instantiateI