android - Hide only the Action bar on Scroll not action bar tabs -

i getting issue @ trying hide action bar while scrolling down.then while scrolling up,the action bar have shown again.

for eg:

i referred tutorial.here can see output , respective codes related hide , show action bar.

i showing output till now.

after scrolling down:

the screenshot above shown, hide action bar tab also.but have hide action bar.that's major issue.

after scrolling up:

the screenshot above shows displays action bar tabs.

topratedfragment.java:

import info.androidhive.tabsswipe.r; import android.app.actionbar; import android.content.res.typedarray; import android.os.bundle; import android.support.v4.app.fragment; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.view.viewtreeobserver; import android.view.window; import android.widget.scrollview;  public class topratedfragment extends fragment implements viewtreeobserver.onscrollchangedlistener {      private float mactionbarheight;     private actionbar actionbar;       @override     public view oncreateview(layoutinflater inflater, viewgroup container,             bundle savedinstancestate) {          view rootview = inflater.inflate(r.layout.fragment_top_rated, container, false);          final typedarray styledattributes = getactivity().gettheme().obtainstyledattributes(                 new int[] { android.r.attr.actionbarsize });         mactionbarheight = styledattributes.getdimension(0, 0);         styledattributes.recycle();          actionbar = getactivity().getactionbar();              ((scrollview)rootview.findviewbyid(r.id.parent)).getviewtreeobserver().addonscrollchangedlistener(this);           return rootview;     }       @override     public void onscrollchanged() {          float y = ((scrollview)getactivity().findviewbyid(r.id.parent)).getscrolly();         if (y >= mactionbarheight && actionbar.isshowing()) {             actionbar.hide();         } else if ( y==0 && !actionbar.isshowing()) {             actionbar.show();         }     } } 

fragment_top_rated.xml:

<?xml version="1.0" encoding="utf-8"?>     <scrollview xmlns:android="http://schemas.android.com/apk/res/android"         android:id="@+id/parent"         android:layout_width="fill_parent"         android:layout_height="fill_parent" >          <linearlayout             android:id="@+id/linearlayout1"             android:layout_width="match_parent"             android:layout_height="wrap_content"               android:paddingtop="?android:attr/actionbarsize"              android:orientation="vertical" >                <button                 android:id="@+id/button1"                 android:layout_width="match_parent"                 android:layout_height="wrap_content"                 android:text="button" />              <button                 android:id="@+id/button5"                 android:layout_width="match_parent"                 android:layout_height="wrap_content"                 android:text="button" />                 .                .     </linearlayout>      </scrollview> 

my issue is, while scrolling down have hide action bar not action bar tabs.

i think this library , sample you.

look @ top-right gif animation:

i think sample file called "viewpagertabscrollviewactivity"