Скачать или смотреть LayoutView Pager: A Lightweight View Pager — Allan Caine

A ViewPager allows a user to scroll through a set of Views, typically by swiping left and right across the device’s screen. Through swipes, the user transitions from view to view.

ViewPagers require an adapter. The developer overrides the adapter’s two methods: getItem(int position):Fragment and getCount():int. The adapter returns the page at a particular index and the total number of pages. Android’s FragmentPagerAdapter and FragmentStatePagerAdapter require that the getItem(int position) method return a Fragment.

Returning a Fragment for each page may be more than what is needed if the view is a simple layout.

This talk will discuss the LayoutViewPager – a lightweight ViewPager. It does not use Fragments. Instead, it accepts as input an array xml file. In turn, the array xml file references layout xml files. Each layout xml file is a page in the LayoutViewPager.

The approach has advantages. All code used to create the Fragments can be eliminated. The details concerning the content of the pages is relegated to xml files. The mechanism for inflating the layout files and correctly displaying them is the responsibility of the LayoutViewPager’s code. So, when the content of the LayoutViewPager needs to be changed, no code changes are required. It is usually enough to simply modify the xml files.

Recorded at https://www.meetup.com/androidkw/even...