Android + RxJava + Kotlin / Double-Click detection

double-click.kt

 val cellStream = ViewObservable.clicks(newCell, false)

            val doubleClickCellStream = cellStream
                    ?.buffer(cellStream?.debounce(200,TimeUnit.MILLISECONDS))
                    ?.map({ list ->
                        println("list ${list}")
                        listOf(list?.first, list?.count())
                    })
                    ?.filter({ list ->
                        val x = list?.last as Int
                        x >= 2
                    })

            doubleClickCellStream
                ?.observeOn(AndroidSchedulers.mainThread())
                ?.subscribe{ list ->
                    println("asdfasdf ${list}")
                    val cell = list?.first as TextView
                    val cellParent = cell.getParent() as ViewGroup
                    cellParent.removeView(cell)
                }

Hello. I have a problem with this code. The Observable don't support multicast. So the item it emits can only obtained by one subscriber. In my test, the cellStream.debounce can't get any thing. So does it need to add share() just as val cellStream = ViewObservable.clicks(newCell, false).share()