Как добавить табы в public class MainActivity extends FragmentActivity?

**Я хочу добавить табы в MainActivity где setContentView 
R.layout.nav_drawer_main **
    `SuppressLint("NewApi")
    public class MainActivity extends  FragmentActivity {
    private DrawerLayout mDrawerLayout;
    private ListView mDrawerList;
    private ActionBarDrawerToggle mDrawerToggle;
    // nav drawer title
    private CharSequence mDrawerTitle;
    // used to store app title
    private CharSequence mTitle;
    // slide menu items
    private String[] navMenuTitles;
    private TypedArray navMenuIcons;
    private ArrayList<NavDrawerItem> navDrawerItems;
    private AdapterNavDrawerList adapter;
    // declare dbhelper and adapter object
    static DBHelper dbhelper;
    AdapterMainMenu mma;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.nav_drawer_main);`