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I know that by default PagerAdapter loads only the current, next and previous pages.
Is there any way to change it, so it will load each and every page?
Thanks!
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So a Viewpager is an android widget that is used to navigate from one page to another page by swiping left or right using the same activity. So when we use Viewpager, we can add different layouts in one activity and this can be done by using the fragments.
To use ViewPager and tabs, you need to add a dependency on ViewPager and on Material Components to your project. To insert child views that represent each page, you need to hook this layout to a PagerAdapter .
Steps for implementing viewpager: Adding the ViewPager widget to the XML layout (usually the main_layout). Creating an Adapter by extending the FragmentPagerAdapter or FragmentStatePagerAdapter class.
ViewPager2 uses FragmentStateAdapter objects as a supply for new pages to display, so the FragmentStateAdapter will use the fragment class that you created earlier. Create an activity that does the following things: Sets the content view to be the layout with the ViewPager2 .
If you have N pages, you can use setOffscreenPageLimit(N-1), so that it will keep all pages in memory.
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I'm not sure this is an answer, but the whole concept of an adapter (also for lists/grids, etc) is that you don't have all the Views loaded to the memory all the time, but it inflates only what's visible. Think about a ListView with 10000 items, the app would crash if it would try to load them all.
The documentation states somewhere that "setOffscreenPageLimit" can be useful and faster if you know how many pages and content you want to show. If you know the information to be shown and it is not heavy weight "setOffscreenPageLimit" would actually improve your performance because the views are only inflated once.
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