val pop = alarm_first()
val fm = FragmentManager
pop.show( fm , "name")

class alarm_first : DialogFragment() {
override fun onCreateView(inflater: LayoutInflater?, container:
 ViewGroup?, savedInstanceState: Bundle?): View {

    var myView = inflater!!.inflate(R.layout.fragment_alarm_first
            , container, false)

    return myView
}}

val fm = FragmentManager

val fm = fragmentManager

val pop = alarm_first()
val fm = FragmentManager
pop.show(fm, "name")

val pop = alarm_first()
val fm = this@YourActivityName.fragmentManager
pop.show(fm, "name")