sometimes I'm replacing all the data from my ArrayList datasource like so:
private ArrayList data;
public void replaceAll(ArrayList newItems) {
this.data.clear();
for (int i = 0; i < newItems.size(); i++) {
this.data.set(i, newItems.get(i));
}
notifyDataSetChanged();
}
but if for example this.data.size() == 50; and newItems.size() == 30; and thus data changed from 50 children to 30, after I run notifyDataSetChanged() my RecyclerView scrolls to the next child.
(i.e if I was on position 15, it goes to 16)
This ONLY happens when the newData size is less than the old, and I can't figure why.
p.s1: I tried running:
int childCntWeLostAfterMutation = data.size() - newData.size();
notifyItemRangeChanged(0, newData.size());
notifyItemRangeRemoved(newData.size(), childCntWeLostAfterMutation);
but then things get worse. It scrolls a lot further behind, and it totally messes up the visible position.
p.s2: Please don't tell me to smoothScrollToPosition, it's super messy and I don't think it will work on my scenario.
p.s3: I am already using setHasStableIds(true) and my public long getItemId(int position) returns a unique ID for every child.
Please help!
