RecyclerView复杂布局动态管理GridLayoutManager

@Override
public void onAttachedToRecyclerView(final RecyclerView recyclerView)
{
super.onAttachedToRecyclerView(recyclerView);

RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
if (manager instanceof GridLayoutManager)
{
final GridLayoutManager gridManager = ((GridLayoutManager) manager);
gridManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup()
{
@Override
public int getSpanSize(int position)
{
return TYPE_HEADER == position ? gridManager.getSpanCount() : 1;
}
});
}
}