After a look at the source of ViewPager.java.
/**
* Set the number of pages that should be retained to either side of the
* current page in the view hierarchy in an idle state. Pages beyond
this
* limit will be recreated from the adapter when needed.
*
* <p>This is offered as an optimization. If you know in advance the
number
* of pages you will need to support or have lazy-loading mechanisms in
place
* on your pages, tweaking this setting can have benefits in perceived
smoothness
* of paging animations and interaction. If you have a small number of
pages (3-4)
* that you can keep active all at once, less time will be spent in
layout for
* newly created view subtrees as the user pages back and forth.</p>
*
* <p>You should keep this limit low, especially if your pages have
complex layouts.
* This setting defaults to 1.</p>
*
* @param limit How many pages will be kept offscreen in an idle state.
*/
public void setOffscreenPageLimit(int limit);
Hope it helps.
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