PartTwoActivity class setting GridLayoutManager

PartTwoActivity.java

private void initRecyclerView() {
   final RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerView);

   int paddingTop = Utils.getToolbarHeight(PartTwoActivity.this) + Utils.getTabsHeight(PartTwoActivity.this);
   recyclerView.setPadding(recyclerView.getPaddingLeft(), paddingTop, recyclerView.getPaddingRight(), recyclerView.getPaddingBottom());

   recyclerView.setLayoutManager(new GridLayoutManager(this, 3));
   RecyclerAdapter recyclerAdapter = new RecyclerAdapter(createItemList());
 
   //...
}