FragmentPagerAdapter getItem is not called

KISS Answer:

Simple use FragmentStatePagerAdapter instead of FragmentPagerAdapter.

I got the answer.. Firstly I thought to delete this question as I am doing a very silly mistake but this answer will help someone who is facing the same problem that Instead of FragmentPagerAdapter, use FragmentStatePagerAdapter.

As @BlackHatSamurai mentioned in the comment:

The reason this works is because FragmentStatePagerAdapter destroys
as Fragments that aren’t being used. FragmentPagerAdapter does not.