hi I'm getting information from web with jsoup and coroutine and I want to show data in recyclerview All the information is well received but the RecyclerView does not show anything and the view is not updated
fun myCoroutine(): ArrayList<DataModel> {
val listx = arrayListOf<DataModel>()
GlobalScope.launch { // launch new coroutine in background and continue
Log.d("asdasdasd", "start")
var doc: Document = Jsoup.connect("http://5743.zanjan.medu.ir").timeout(0).maxBodySize(0).ignoreHttpErrors(true).sslSocketFactory(setTrustAllCerts()).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")
listx.add(DataModel(cols.get(2).text(),strhref))
Log.d("asdasf",cols.get(2).text())
}
}
}
return listx
}
private fun getData() {
itemsData = ArrayList()
itemsData = myCoroutine()
adapter.notifyDataSetChanged()
adapter = RVAdapter(itemsData)
}
and this is oncreate
var itemsData = ArrayList<DataModel>()
adapter = RVAdapter(itemsData)
val llm = LinearLayoutManager(this)
itemsrv.setHasFixedSize(true)
itemsrv.layoutManager = llm
getData()
itemsrv.adapter = adapter
This code has numerous bugs (getData, for instance, never sets the adapter onto the RecyclerView), but the biggest issue is that you're not actually waiting for listx to be populated - you're returning it immediately before it's populated. You need to either move the population of the adapter to the coroutine and run that part on the UI thread dispatcher, or use a callback, or dispatch it to the UI thread. Launching a coroutine and returning immediately doesn't make the data get populated when something tries to use it.
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