ViewPager2 default position

Question

I'm creating a slideshow with ViewPager2. For example, the slideshow has 3 items and I want to show the second item when the activity opens. I use setCurrentItem(int item, boolean smoothScroll) method but it doesn't work and nothing happens. How can I achieve it?

viewPager.adapter = adapter viewPager.setCurrentItem(1, true) 

Answer 1

I think an easier more reliable fix is to defer to next run cycle instead of unsecure delay e.g

viewPager.post {   viewPager.setCurrentItem(1, true) } 

Answer 2

setCurrentItem(int item, boolean smoothScroll) works correctly in ViewPager but in ViewPager2 it does not work as expected. Finally, I faced this problem by adding setCurrentItem(int item, boolean smoothScroll) method into a delay like this:

Handler().postDelayed({      view.viewPager.setCurrentItem(startPosition, false) }, 100)