para aquellos que tienen que implementar una lógica dentro del adaptador RecyclerView, aún pueden usar el enfoque @ernesto combinado con un en scrollListener para obtener información sobre what you want
cómo consultar el RecyclerView. Dentro del adaptador tendrás algo como esto:
@Override
public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
if(manager instanceof LinearLayoutManager && getItemCount() > 0) {
LinearLayoutManager llm = (LinearLayoutManager) manager;
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
}
@Override
public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
int visiblePosition = llm.findFirstCompletelyVisibleItemPosition();
if(visiblePosition > -1) {
View v = llm.findViewByPosition(visiblePosition);
//do something
v.setBackgroundColor(Color.parseColor("#777777"));
}
}
});
}
}