'boolean android.support.v7.widget.RecyclerView$ViewHolder.shouldIgnore()' on a null object reference when doing recyclerView.addView

Question

Why when I tried to add additional view to recyclerView after recyclerView.setAdapter()

return this error

Attempt to invoke virtual meth         


        

Answer 1

This error occur, because RecyclerView creates its own views (see .onCreateViewHolder() method) - it manages views itself, you cannot add view like that. RecyclerView (that's why it called so) reuses inflated views so it don't have to create new view every time. You should add some data object and bind that object in ViewHolder implementation