How to change Fragment Kotlin

Question

I'm starting in Kotling and I don't know how to change between fragments, I have tried this code:

val manager = supportFragmentManager
    val transaction = manager.beginTransaction()
    transaction.add(R.layout.fragment_information.toInt(), ComplainFragment())
    transaction.commit()

R.layout.fragment_information.toInt()

But i have an error with this parameter because it doesn't find the fragment Id.

Answer 1

I usually use replace to change between fragments. Also change R.layout.fragment_information to R.id.fragment_layout_id only, so no need toInt()

transaction.replace(R.id.fragment_layout_id, fragment)

Here is my suggestion.

    var fragment: Fragment? = null

            when (itemId) {
                        R.id.fragment_information -> {
                            fragment = ComplainFragment()
                        }
            }

            if (fragment != null) {
                    val transaction = supportFragmentManager.beginTransaction()
                    transaction.replace(R.id.fragment_layout_id, fragment)
                    transaction.commit()
            }