ActionBar does not show title with spinner

Question

我的ActionBar標題或活動瓷磚不顯示與Spinner下拉式添加。任何想法是什麼錯？我已經做了很多的研究，但我沒有看到問題

public class MainActivity extends ListActivity implements ActionBar.OnNavigationListener{ 

private static final int EDITOR_ACT_REQUEST = 504; 
private static final int MENU_DELETE_ID = 1002; 
private ActionBar actionBar; 
private ArrayList<SpinnerNavItem> navSpinner; 
private TitleNavigationAdapter adapter; 
String curdate; 
private int currentNoteId; 
private ArgueDataS datasource; 
List<ArgueItem> argueList; 
public static ArrayAdapter<String> add; 
private ArgueItem note; 
TextView day; 
String datastring; 


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

    actionBar = getActionBar(); 
    actionBar.setDisplayShowTitleEnabled(true); 
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST); 

    // Spinner title navigation data 
    navSpinner = new ArrayList<SpinnerNavItem>(); 
    navSpinner.add(new SpinnerNavItem("Argue Time", R.drawable.alarm)); 
    navSpinner.add(new SpinnerNavItem("Top 10", R.drawable.topten)); 

    adapter = new TitleNavigationAdapter(getApplicationContext(), navSpinner); 

    // assigning the spinner navigation  
    actionBar.setListNavigationCallbacks(adapter, this); 

Answer 1

你應該改變

actionBar.setDisplayShowTitleEnabled(true); 

到

actionBar.setDisplayShowTitleEnabled(false);