app/src/main/res/menu/menu_ledger_search.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/ledger_search"
        android:icon="@drawable/ic_search_black_24dp"
        android:title="@string/ledger_search"
        app:showAsAction="always"
        app:actionViewClass="androidx.appcompat.widget.SearchView"/>

</menu>