我想通过传递它的名字来加载片段，但是它不起作用，请任何人帮助我。下面是代码--------------------------------

fun loadFragment(request: String)
    {
        val ft = supportFragmentManager.beginTransaction()
        ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
        var fragment: Fragment? = null
        if(request.equals(getString(R.string.keywords),ignoreCase = true))
        {
            fragment=AddNewKeyword()
        }
        ft.replace(R.id.containerLayout, fragment!!)
        ft.commit()

    }