android – 从Fragment添加项目到操作栏的选项菜单然后更改方向后崩溃

private String[] mapNames;
@Override
public void onCreate(Bundle savedInstanceStatE) {
    super.onCreate(savedInstanceStatE);
    setHasOptionsMenu(true);
    // init an String array `mapNames` which is used when populaTing submenu
    // ...
}
@Override
public void onCreateOptionsMenu(Menu menu,MenuInflater inflater) {

    inflater.inflate(R.menu.fragment_maps,menu);

    SubMenu mapNamesMenu = menu.findItem(R.id.map_names).getSubMenu();
    mapNamesMenu.clear();
    for (int i=0; i<mapNames.length; i++) {
        mapNamesMenu.add(1,i,Menu.NONE,mapNames[i]);
    }

    super.onCreateOptionsMenu(menu,inflater);
}

在res / menu / fragment_maps.xml中我有

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://scheR_806_11845@as.android.com/apk/res/android">
    <item
        android:id="@+id/map_names"
        android@R_908_6964@="Maps"
        android:icon="@drawable/maps_32"
        android:showAsAction="always|withText">
        <menu>
            <item android:id="@+id/placeholder_maps" />
        </menu>
    </item>
</menu>

在旋转手机之前一切正常.方向更改后,此菜单变得不可访问(单击图标时没有任何反应).然后,如果我再次旋转手机,我会收到此错误：

FATAL EXCEPTION: main
android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running?
at android.view.ViewRoot.setView(ViewRoot.java:532)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
at android.view.Window$LocalWindowManager.addView(Window.java:424)
at android.widget.PopupWindow.invokePopup(PopupWindow.java:912)
at android.widget.PopupWindow.showAsDropDown(PopupWindow.java:824)
at com.actionbarsherlock.internal.widget.IcsListPopupWindow.show(IcsListPopupWindow.java:226)
at com.actionbarsherlock.internal.view.menu.@R_696_9407@opupHelper.tryShow(@R_696_9407@opupHelper.java:129)
at com.actionbarsherlock.internal.view.menu.@R_696_9407@opupHelper.show(@R_696_9407@opupHelper.java:102)
at com.actionbarsherlock.internal.view.menu.Action@R_696_9407@resenter.onSubMenuSELEcted(Action@R_696_9407@resenter.java:273)
at com.actionbarsherlock.internal.view.menu.MenuBuilder.dispatchSubMenuSELEcted(MenuBuilder.java:263)
at com.actionbarsherlock.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:892)
at com.actionbarsherlock.internal.view.menu.ActionMenuView.invokeItem(ActionMenuView.java:510)
at com.actionbarsherlock.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:145)
at android.view.View.performClick(View.java:2494)
at android.view.View$PerformClick.run(View.java:9122)
at android.os.Handler.handleCallBACk(Handler.java:587)
at android.os.Handler.dispatchmessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3806)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)

任何想法如何解决？我使用的是Android 2.3.6

编辑：见test repository