如何在x秒后在Kotlin中的片段之间转换，而无需单击(就像闪屏一样)

import android.os.Bundle
import android.os.Handler
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment

class FragmentA : Fragment() {
    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.fragment_a, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        
        // 在x秒后切换到FragmentB
        Handler().postDelayed({
            val fragmentB = FragmentB()
            requireActivity().supportFragmentManager.beginTransaction()
                .replace(R.id.fragment_container, fragmentB)
                .commit()
        }, x * 1000) // x为秒数，转换为毫秒
    }
}

class FragmentB : Fragment() {
    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.fragment_b, container, false)
    }
}