Android Action Bar, adding action buttons

I'm trying to add button to the Action Bar with no luck. There are no errors. Button is in the @drawable. But it doesn't show up. What am I doing wrong?

(It asks me to add more details, but I have nothing more to add)

test activity :

import android.content.Intent; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import android.view.Menu; import android.view.MenuInflater; import android.view.View; import android.widget.Button; public class test extends ActionBarActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.test); setupCREATEbut(); } private void setupCREATEbut() { Button CREATEbut = (Button) findViewById (R.id.appenter2); CREATEbut.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v){ Intent intent = new Intent(v.getContext(), MainActivity.class); startActivityForResult(intent,0); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.topmenu, menu); return super.onCreateOptionsMenu(menu); } } 

test xml :

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="rs.test"> <LinearLayout android:id="@+id/centerblock" android:layout_width="400dp" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:orientation="vertical" > <RelativeLayout android:id="@+id/relcenterblock" android:layout_width="fill_parent" android:layout_height="415dp" > <Button android:id="@+id/appenter2" android:layout_width="160dip" android:layout_height="160dip" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:background="@drawable/bigroundbutton" android:gravity="center" android:text="@string/request" android:textColor="#ffffff" android:textSize="30sp" /> </RelativeLayout> </LinearLayout> </RelativeLayout> 

topmenu xml :

 <menu xmlns:android="http://schemas.android.com/apk/res/android" > <item android:id="@+id/action_search" android:icon="@drawable/ic_action_toprightmenu" android:title="@string/toprightmenu"/> </menu>