Android-RecyclerView notifyDatasetChanged不更新布局视图

Question

I have an Adapter for a RecyclerView . The adapter has a property size, that can be either SMALL or LARGE.

Depending on the property, the layouts loaded for viewholders will be different.

I have a button to change this property, however after I set it, and if I call notifyDataSetChanged() the views are not updated.

I have also tried requestLayout and invalidate without success. This is, onCreateViewHolder is never called again.

Answer 1

notifyDataSetChanged() call onBindViewHolder() when using RecyclerView.It doesnot call onCreateViewHolder. You can try setAdapter() for the above problem.

Answer 2

One way to do is like calling

recyclerView.setAdapater(new YourCustomRecylcerViewAdapter(yourProperty, listToUpdate))

whenever you change the property. This will invoke the onCreateViewHolder() of adapter.

Answer 3

Well I got it, it was because before onCreateViewHolder , getItemViewType is called.

If no new view is set then it won't be called. So I had to create a new viewType for each of the small views and problem solved :).