android - How to avoid gap between action bar and list in List navigation mode? -

i have activity ab + list navigation mode. in manifest file android:configchanges="orientation|screensize" set activity. when open list ab , rotate device in landscape mode list still visible, there gap between ab , list (due ab changes it's heigh while orientation change).

how correctly handle situation or how can avoid @ all?

this situation similar both devices api 8+ , 11+

portrait

and landscape

edited. i've created sample project android 4.0+ w/o abs. result same

private actionbar mactionbar; private static string[] array = {"item1","item2","item3","item4","item4"};

@override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      mactionbar = getactionbar();     arrayadapter<string> adapter = new arrayadapter<string>(mactionbar.getthemedcontext(), android.r.layout.simple_spinner_item, array);     adapter.setdropdownviewresource(android.r.layout.simple_spinner_dropdown_item);     mactionbar.setnavigationmode(actionbar.navigation_mode_list);     mactionbar.setlistnavigationcallbacks(adapter, new onnavigationlistener() {          @override         public boolean onnavigationitemselected(int itemposition, long itemid) {             log.d("tag", "item position " + itemposition);             return true;         }     }); } 

<application     android:allowbackup="true"     android:icon="@drawable/ic_launcher"     android:label="@string/app_name"     android:theme="@style/apptheme" >     <activity         android:name="com.example.ablmtest.mainactivity"         android:label="@string/app_name"         android:configchanges="orientation|screensize" >         <intent-filter>             <action android:name="android.intent.action.main" />              <category android:name="android.intent.category.launcher" />         </intent-filter>     </activity> </application>