header_action_bar.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/actionBar"
    style="@style/HeaderActionBar">

    <ImageButton
        android:id="@+id/menuBtn"
        android:contentDescription="@string/cd_menu"
        android:visibility="visible"
        app:srcCompat="@drawable/btn_menu"
        style="@style/HeaderActionButton" />

    <ImageButton
        android:id="@+id/backBtn"
        android:contentDescription="@string/cd_back"
        android:visibility="gone"
        app:srcCompat="@drawable/btn_back"
        style="@style/HeaderActionButton" />

    <TextView
        android:id="@+id/headerTitle"
        android:text="@string/title_default"
        style="@style/HeaderTitle" />

    <ImageButton
        android:id="@+id/searchBtn"
        android:contentDescription="@string/cd_search"
        app:srcCompat="@drawable/btn_search"
        style="@style/HeaderActionButton" />

</LinearLayout>