Android-ActionSherlock导航栏按钮不会调用相应的操作

Question

我已经能够将共享窗口小部件以及ListNavigation放在我的操作栏上。 但是，当我单击它们时，“共享”按钮不提供共享选项，并且ListNavigation也不带我进入我选择的列表项。

这是我必须设置的代码：

public class MainActivity extends SherlockActivity implements ActionBar.OnNavigationListener
{
    Dialog dialog;

    private TextView mSelected;
    private String[] mLocations;

    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTheme(R.style.Theme_Sherlock_Light);

        //setContentView(R.layout.list_navigation);
        mSelected = (TextView)findViewById(R.id.text);

        mLocations = getResources().getStringArray(R.array.locations);


        Context context = getSupportActionBar().getThemedContext();
        ArrayAdapter<CharSequence> list = ArrayAdapter.createFromResource(
                context, R.array.locations, R.layout.sherlock_spinner_item);
        list.setDropDownViewResource(R.layout.sherlock_spinner_dropdown_item);

        getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
        getSupportActionBar().setListNavigationCallbacks(list, this);        

and here is my menu inflater and other relevant methods:

    public boolean onCreateOptionsMenu(Menu menu)
    {       
        MenuInflater inflater = getSupportMenuInflater();
        inflater.inflate(R.menu.main_menu, menu);
        return true;
    }

    private Intent createShareIntent() 
    {   
        Intent shareIntent = new Intent(Intent.ACTION_SEND);
        shareIntent.setType("text/plain"); //shareIntent.setType("image/*");

        shareIntent.putExtra(Intent.EXTRA_TEXT,"Mobile apps to plan and start your busienss, covering business ideas, business planning, marketing and fundraising.");
        shareIntent.putExtra(Intent.EXTRA_SUBJECT, "Check out http://www.myurl.com");

        return shareIntent;
    }    

当我选择菜单项之一时，永远不会调用此方法：

public boolean onNavigationItemSelected(int itemPosition, long itemId) 
{        
    if ( itemPosition == 0 )
    {
        Intent myIntent = new Intent(MainActivity.this, MainActivity.class);
        MainActivity.this.startActivity(myIntent);          
    }
    else
    if ( itemPosition == 1 )
    {
        Intent myIntent = new Intent(MainActivity.this, LearnActivity.class);
        MainActivity.this.startActivity(myIntent);          
    }        
    else
    if ( itemPosition == 2 )
    {
        Intent myIntent = new Intent(MainActivity.this, ServicesActivity.class);
        MainActivity.this.startActivity(myIntent);          
    }        
    else
    if ( itemPosition == 3 )
    {
        Intent myIntent = new Intent(MainActivity.this, GiveBackActivity.class);
        MainActivity.this.startActivity(myIntent);
    }                

    return true;
}    

这是我的main_menu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android">  

<item android:id="@+id/menu_item_share"         
android:showAsAction="ifRoom"         
android:title="Share"         
android:actionProviderClass="android.widget.ActionProvider" />  

<item
android:id="@+id/menuSort"
android:showAsAction="ifRoom"
android:actionLayout="@layout/action_sort"  />

</menu>

有谁知道为什么共享小部件或ListNavigation在选择时都不会调用其相应方法？

引导模拟器时，我还会收到以下两个错误/警告：

[2013-06-27 08:43:57 - actionbarsherlock] 'default' is not a best match for any device/locale combination.
[2013-06-27 08:43:57 - actionbarsherlock] Displaying it with ', , Locale Language ___Region __, sw320dp, w320dp, h533dp, Normal Screen, Long screen aspect ratio, Portrait Orientation, Normal, Day time, High Density, Finger-based touchscreen, Soft keyboard, No keyboard, Hidden navigation, Trackball navigation, Screen resolution 800x480, API Level 15' which is compatible, but will actually be displayed with another more specific version of the layout.

以下是该应用程序的屏幕元素如何变灰的屏幕截图：

而且，如果我在代码中放置了一条调试语句，似乎onNavigationItemSelected（）方法将不断被循环调用，例如每分钟100次左右。

谢谢！ -亚历克斯

Answer 1

看来您已经注释了实际连接导航侦听器的行：

// getSupportActionBar().setListNavigationCallbacks(list, this);

我没有看到onOptionsItemSelected(MenuItem) ，即按下操作栏按钮时会调用它。

另外，不知道你是否忘了@Override上标注onNavigationItemSelected和onCreateOptionsMenu ，但它无法显示。