如何创建片段之间的通信？

Question

我有一个MainActivity，它是一个选项卡式活动。 有两个选项卡，每个选项卡中都有一个片段。 在第一个片段中，我有一个recyclerview，其中包含新闻列表 另外，我应该有一个收藏夹列表。 现在，我只需要在第二个片段中复制新闻的整个列表（第一个片段）。

我创建了一个接口，该接口由第一个和第二个片段实现。 在MainActivity中，我将addOnPageChangelistener（）添加到了viewpager中。我真的不知道如何在Interface方法上传递数据以填充与第一个片段完全相同的第二个片段

NewsFragment（第一个片段）

class NewsFragment : Fragment(),OnFragmentResume {

    lateinit var recyclerView: RecyclerView
    lateinit var progBar: ProgressBar
    var adapterRec:AdapterCust?=null


    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        val view = inflater.inflate(R.layout.news_fragment, container, false)

        recyclerView = view.findViewById(R.id.recyclerView)
        recyclerView.hasFixedSize()
        val itemDecoration = DividerItemDecoration(context, DividerItemDecoration.VERTICAL)
        recyclerView.addItemDecoration(itemDecoration)
        progBar = view.findViewById(R.id.progBar)

        adapterRec = AdapterCust { articolo ->
            val intent = Intent(context, WebViewUrl::class.java)
            val desc = articolo.url
            intent.putExtra("url", desc)
            startActivity(intent)
        }
        recyclerView.adapter = adapterRec

        val task = (SomeNameTask())
        task.execute()

        return view
    }

    inner class SomeNameTask : AsyncTask<Void, Void, List<Articolo>>() {

        override fun onPostExecute(articoli: List<Articolo>) {

            adapterRec?.items = articoli
            val itemSingleton = ItemsSingleton.istance
            itemSingleton.news = articoli
            adapterRec?.completeItemsList = articoli
            progBar.visibility = View.GONE
        }

        override fun doInBackground(vararg params: Void?): List<Articolo>? {

            try {
                val link = "https://api.hnpwa.com/v0/news/1.json"
                val url = URL(link)
                val connection: HttpURLConnection = url.openConnection() as HttpURLConnection
                connection.requestMethod = "GET"
                val inp = BufferedReader(InputStreamReader(connection.inputStream))
                val response = StringBuffer()
                val gson = Gson()
                var input: String? = null

                while ({ input = inp.readLine(); input }() != null) {
                    response.append(input)
                }

                val articoli = gson.fromJson<List<Articolo>>(response.toString(),
                    object : TypeToken<List<Articolo>>() {}.type
                )
                inp.close()
                return articoli
            } catch (e: Exception) {
                return null
            }
        }

        override fun onPreExecute() {
            super.onPreExecute()
            progBar.visibility = View.VISIBLE
        }
    }

    override fun OnFragmentResumed() {
        //  ..miss implementation in the interface method..
    }
}

MainActivity

class MainActivity : AppCompatActivity() {

    lateinit var sectionsPagerAdapter: SectionsPagerAdapter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        sectionsPagerAdapter = SectionsPagerAdapter(this, supportFragmentManager)
        viewPager.adapter = sectionsPagerAdapter


        viewPager.addOnPageChangeListener(object : ViewPager.OnPageChangeListener{

            override fun onPageScrollStateChanged(p0: Int) {
            }

            override fun onPageScrolled(p0: Int, p1: Float, p2: Int) {
            }

            override fun onPageSelected(index: Int){
                ((viewPager.adapter as FragmentPagerAdapter).getItem(index) as? OnFragmentResume)?.OnFragmentResumed() //interface method
            }
        })

        tabs.setupWithViewPager(viewPager)
        setSupportActionBar(toolbar)
    }

收藏夹片段

class FavouriteFragment : Fragment(), OnFragmentResume {

    lateinit var recyclerView: RecyclerView
    var adapterCust:AdapterCust?=null

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        val view = inflater.inflate(R.layout.favourite_fragment, container, false)

        recyclerView = view.findViewById(R.id.recyclerViewFav)
        recyclerView.hasFixedSize()
        val itemDecoration = DividerItemDecoration(context, DividerItemDecoration.VERTICAL)
        recyclerView.addItemDecoration(itemDecoration)

        adapterCust = AdapterCust { articolo ->
            val intent = Intent(context, WebViewUrl::class.java)
            val desc = articolo.url
            intent.putExtra("url", desc)
            startActivity(intent)
        }

        adapterCust!!.items = ItemsSingleton.istance.news
        recyclerView.adapter = adapterCust

        return view

    }

    override fun OnFragmentResumed() {
      // miss implementation..

    }
}