ViewPager has a public function setOffscreenPageLimit (http://developer.android.com/reference/android/support/v4/view/ViewPager.html#setOffscreenPageLimit(int)), What is it? Her
setOffscreenPageLimit() is normally, we use to set limit of pages that will set in idle state. this method we use when you have a long list of pages in view pager. this method keep away to occurred low memory error and also beneficial when you set lazy loading on pager.