【Purpose】
I want to write a program that uses ViewPager2 to switch images. In the reference book I'm using, I selected ViewPager, but in my Android studio, there is only ViewPager2, and if I select that, even if I write the code according to the reference book, it does not compile.

[Code]

package com.example.myslideshow
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.fragment.app.Fragment
import androidx.fragment.app.FragmentPagerAdapter
import kotlinx.android.synthetic.main.activity_main. *
class MainActivity: AppCompatActivity () {
    class MyAdapter (fm: androidx.fragment.app.FragmentManager): FragmentPagerAdapter (fm) {
        private val resources = listOf (
            R.drawable.slide00, R.drawable.slide01,
            R.drawable.slide02, R.drawable.slide03,
            R.drawable.slide04, R.drawable.slide05,
            R.drawable.slide06, R.drawable.slide07,
            R.drawable.slide08, R.drawable.slide09
        )
        // Number of views to display
        override fun getCount (): Int {
            return resources.size
        }
        // Receives the page number as an argument, creates an instance of ImageFragment and returns it
        override fun getItem (position: Int): Fragment {
            return ImageFragment.newInstance (resources [position])
        }
    }
    override fun onCreate (savedInstanceState: Bundle?) {
        super.onCreate (savedInstanceState)
        setContentView (R.layout.activity_main)
        pager.adapter = MyAdapter (supportFragmentManager)
    }
}

【error】
This is where the compile error comes from

pager.adapter = MyAdapter (supportFragmentManager)

error contents:

Type mismatch.
Required:
(RecyclerView.Adapter<RecyclerView.ViewHolder!>? .. RecyclerView.Adapter<*>?)
Found:
MainActivity.MyAdapter

I don't use RecyclerView ...
But this articleViewPager vs ViewPager2Is it because i am using ViewPager2 that you find RecyclerView and say "Yeah"? I'm guessing. But I don't know the solution