MainActivity.java

public class MainActivity extends AppCompatActivity {

    private PlaceHolderView mDrawerView;
    private DrawerLayout mDrawer;
    private Toolbar mToolbar;
    private PlaceHolderView mGalleryView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mDrawer = (DrawerLayout)findViewById(R.id.drawerLayout);
        mDrawerView = (PlaceHolderView)findViewById(R.id.drawerView);
        mToolbar = (Toolbar)findViewById(R.id.toolbar);
        mGalleryView = (PlaceHolderView)findViewById(R.id.galleryView);
        setupDrawer();
    }

    private void setupDrawer(){
        mDrawerView
                .addView(new DrawerHeader())
                .addView(new DrawerMenuItem(this.getApplicationContext(), DrawerMenuItem.DRAWER_MENU_ITEM_PROFILE))
                .addView(new DrawerMenuItem(this.getApplicationContext(), DrawerMenuItem.DRAWER_MENU_ITEM_REQUESTS))
                .addView(new DrawerMenuItem(this.getApplicationContext(), DrawerMenuItem.DRAWER_MENU_ITEM_MESSAGE))
                .addView(new DrawerMenuItem(this.getApplicationContext(), DrawerMenuItem.DRAWER_MENU_ITEM_GROUPS))
                .addView(new DrawerMenuItem(this.getApplicationContext(), DrawerMenuItem.DRAWER_MENU_ITEM_NOTIFICATIONS))
                .addView(new DrawerMenuItem(this.getApplicationContext(), DrawerMenuItem.DRAWER_MENU_ITEM_TERMS))
                .addView(new DrawerMenuItem(this.getApplicationContext(), DrawerMenuItem.DRAWER_MENU_ITEM_SETTINGS))
                .addView(new DrawerMenuItem(this.getApplicationContext(), DrawerMenuItem.DRAWER_MENU_ITEM_LOGOUT));

        ActionBarDrawerToggle  drawerToggle = new ActionBarDrawerToggle(this, mDrawer, mToolbar, R.string.open_drawer, R.string.close_drawer){
            @Override
            public void onDrawerOpened(View drawerView) {
                super.onDrawerOpened(drawerView);
            }
            @Override
            public void onDrawerClosed(View drawerView) {
                super.onDrawerClosed(drawerView);
            }
        };

        mDrawer.addDrawerListener(drawerToggle);
        drawerToggle.syncState();
    }
}