Can you remove back button after search view has been clicked (expanded)

Question

I have one activity with action bar. Action bar contains search view. I don't want that back button which appears when search view is clicked. Is it possible to remove it or hide it? That back button is not visible until I click the search view. By the way the following line of code doesn't help.

getSupportActionBar().setDisplayHomeAsUpEnabled(false);

Menu resource

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

<item
    android:id="@+id/action_search"
    android:title=""
    app:showAsAction="always|collapseActionView"
    android:icon="@drawable/ic_action_search"
    app:actionViewClass="android.support.v7.widget.SearchView" />

</menu>

Answer 1

I have been dealing with a similar issue. To simply remove the arrow, I changed app:showAsAction="always|collapseActionView" to app:showAsAction="always". However, now I have a blank space instead of the arrow, which is an issue I have yet to resolve.