ViewPager中ParentFragment与Fragment之间的通信

Question

在homeFragment中单击sort按钮时，必须将该值传递给viewpager fragements

我在谷歌上找到了直接放在MainActivity中的片段之间的通信

Answer 1

我试图在stackoverflow的帮助下自己解决这个问题

HomeFragment.kt

    private var sort: Int = 0
    private var sortListener: SortListener? = null


    override fun onActivityCreated(savedInstanceState: Bundle?) {
            super.onActivityCreated(savedInstanceState)
            val childFragment = adapter?.instantiateItem(viewPager, fragmentPosition) as ChildFragment
            setSortListener(childFragment)
        }

    fun userClickinSort(){
sortListener?.onSorted(HomeConstants.SORT_TYPE_NAME)
}
    private fun setSortListener(sortListener: SortListener) {
            this.sortListener = sortListener
        }

注意：在ChildFragment中实现了此SortListener