fragment inside fragment {Kotlin}

Question

is there any possible way to put a fragment inside a fragment?

I tried to put a viewPager in a fragment and write the code on OnCreatedView but it gives me error!!!

I tried this one but the fragments goes for every fragment in the activity!

pageradapter.kt

class pagerAdapter(fm:FragmentManager):FragmentStatePagerAdapter(fm){

override fun getItem(position: Int): Fragment? {
     return when(position){
        0-> Fragment1()
        1-> Fragment2()
        else -> null
    }

}


override fun getCount(): Int {
    return 2
}
 fun rotatePosition(position: Int):Int{
    return (count -1)-position
}

class pagerAdapter(fm:FragmentManager):FragmentStatePagerAdapter(fm){

override fun getItem(position: Int): Fragment? {
     return when(position){
        0-> Fragment1()
        1-> Fragment2()
        else -> null
    }

}


override fun getCount(): Int {
    return 2
}
 fun rotatePosition(position: Int):Int{
    return (count -1)-position
}

pageradapter2.kt

class pagerAdapter2(fm: FragmentManager):FragmentStatePagerAdapter(fm){

override fun getItem(position: Int): Fragment? {
    return when(position){
        0-> BlankFragment()
        else->null
    }
}

/**
 * Return the number of views available.
 */
override fun getCount(): Int {
    return 1
}

MainActivity.kt

class MainActivity : AppCompatActivity() {

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    val pagerAdapter2 = pagerAdapter2(supportFragmentManager)
    val pager1= findViewById<View>(R.id.pager2) as ViewPager
    pager1.adapter = pagerAdapter2

    val adapter = pagerAdapter(supportFragmentManager)
    val pager = findViewById<View>(R.id.pager) as ViewPager
    pager.adapter = adapter
    pager.setCurrentItem(adapter.rotatePosition(0), false)
}

P.S. The first Answer solved my problem.

Answer 1

If you are adding fragment for an activity you use either fragmentManager or supportFragmentManager.

If you are adding fragment for a fragment - you should use childFragmentManager, accessing fragmentManager from fragment will lead to using the same one that activity does.