在片段和协程中使用 Recyclerview 不起作用

using Recyclerview in fragment and coroutines not work

你好我在片段和协程中使用了 recyclerview,但是 recyclerview 没有更新并且是空的

这是我从网络获取数据的代码,我在 OnCreateView 中编写了它

launch {
            val operation = async(Dispatchers.IO) {
                Log.d("asdasdasd", "start")
                var doc: Document = Jsoup.connect("http://5743.zanjan.medu.ir").timeout(0).maxBodySize(0).ignoreHttpErrors(true).get()
                val table: Elements = doc.select("table[class=\"table table-striped table-hover\"]")
                for (myTable in table) {
                    val rows: Elements = myTable.select("tr")
                    for (i in 1 until rows.size) {
                        val row: Element = rows.get(i)
                        val cols: Elements = row.select("td")
                        val href: Elements = row.select("a")
                        val strhref: String = href.attr("href")
                        itemsData.add(CircularModel(cols.get(2).text(),strhref,"2019",""))
                    }
                }
            }
            operation.await() // wait for result of I/O operation without blocking the main thread

            // update views
            activity?.runOnUiThread{
                adapter = CircularAdapter(itemsData, this@CircularFragment)
                adapter.notifyDataSetChanged()
                rc.adapter = adapter
            }
        }

我检查了一下,itemsData 不为空,但我不知道为什么 recyclerview 没有更新

将适配器设置为 Recycler 后尝试调用 adapter.notifyDataSetChanged()

尝试使用 withContext(Dispatchers.Main) 而不是 activity?.runOnUiThread{ 语法从协程访问主线程