title: ViewPager image gallery loading
body: <p>I have a ListView with item's. Each item is ViewPager.
  In ViewPager I pass PagerAdapter with array of image urls.
  Because of such design there are to many images loading at the same time.
  How to not start image loading of all viewpager items before swipe action?
  I want my app to start loading only the image from the first page..</p>