数组列表注意的点mutableListOf<ArrayList<Int>>()

//两个数组用于装子视图
private val childArray = mutableListOf<ArrayList<Int>>()

val seChildArray = ArrayList<Int>()
    for (i in 0..5){
        seChildArray.add(i)
    }
    childArray.add(seChildArray)
    seChildArray.clear()
    seChildArray.add(5)
    seChildArray.add(6)
    Log.v("lfl","${childArray[0].size}")  得出的结果是2
}
当添加到

 childArray.add(seChildArray)之后在改变seChildArray中的值，chilArray中的值也会改变