ActivityPartTwo class

ActivityPartTwo.java

public class PartTwoActivity extends ActionBarActivity {

    private Toolbar mToolbar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        setTheme(R.style.AppThemeGreen);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_part_two);

        initToolbar();
        initRecyclerView();
    }

    private void initToolbar() {
        mToolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(mToolbar);
        setTitle(getString(R.string.app_name));
        mToolbar.setTitleTextColor(getResources().getColor(android.R.color.white));
    }

    private void initRecyclerView() {
        final RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        RecyclerAdapter recyclerAdapter = new RecyclerAdapter(createItemList());
        recyclerView.setAdapter(recyclerAdapter);
        recyclerView.setOnScrollListener(new HidingScrollListener(this));
    }

    private List<String> createItemList() {
        List<String> itemList = new ArrayList<>();
        for(int i=0;i<20;i++) {
            itemList.add("Item "+i);
        }
        return itemList;
    }
}