code: private void setupDrawer() {
  		drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
  		drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.opendrawer,
  				R.string.closedrawer);
  		drawerLayout.setDrawerListener(drawerToggle);
  	}
docs: Sets up the navigation drawer.