Recyclerview findViewHolderForAdapterPosition returns null after scroll to new position - android-recyclerview

Question

RecyclerView recyclerView;
MyAdapter mAdapter;
List<ItemData> itemsData;
Global glb;
LinearLayoutManager llm;
private int valData() {
String tmpStr;
Cursor c;
int position=0;
enter code here
AutoCompleteTextView tTbl = (AutoCompleteTextView) findViewById(R.id.tblNam);
tmpStr = tTbl.getText().toString();
c = db.rawQuery("SELECT * FROM tblDts WHERE tblNam = '" + tmpStr + "'", null);
if (c.getCount() == 0) {
showMessage("Error", "Table Name Not Found");
c.close();
tTbl.requestFocus();
return 1;
}
c.close();
for (int i = 0; i < itemsData.size(); i++) {
tmpStr = itemsData.get(i).getTitle().toString();
c = db.rawQuery("SELECT * FROM itmDts WHERE itmNam = '" + tmpStr + "';", null);
if (c.getCount() == 0) {
c.close();
//llm.scrollToPositionWithOffset(i,0);
//recyclerView.smoothScrollToPosition(i);
//recyclerView.scrollToPosition(i);
i tried all the above scroll procedure, when i using getChildAt its return only view of the before scroll and not the new one
//View vw = llm.getChildAt(0);
tmpStr="";
when rise the findviewholderforadapterpostion in between current display views there has been it shows correctly but if i rise non display position it returns null
RecyclerView.ViewHolder vh = recyclerView.findViewHolderForAdapterPosition(i);
View vw = vh.itemView;
AutoCompleteTextView tTa=(AutoCompleteTextView)vw.findViewById(R.id.item_title);
tmpStr =tTa.getText().toString();
showMessage(llm.getChildCount()+"Error" + position, "Item Name Not Found" + tmpStr);
//recyclerView.setLayoutManager(lm);
return 1;
}
c.close();
}
return 0;
}
}
}

Answer 1

I am always facing with these kind of problems on Android platform. And most of my problems fixed with thread sleep :) This is not a proper way but could not found any other way. Just you need to add 100 ms sleep after scrolled the next item.
Following code is for Xamarin.Android.
public async static void FocusNextItem(Android.Support.V7.Widget.RecyclerView recyclerView, int nextPosition)
{
recyclerView.ScrollToPosition(nextPosition);
var viewHolder = recyclerView.FindViewHolderForAdapterPosition(nextPosition);
if (viewHolder == null)
{
await System.Threading.Tasks.Task.Delay(100);
viewHolder = recyclerView.FindViewHolderForAdapterPosition(nextPosition);
}
viewHolder?.ItemView?.RequestFocus();
}