sample/src/main/res/layout/item_view_search_input.xml

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:parentTag="android.widget.FrameLayout">

    <EditText
        android:id="@+id/searchEditText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="16dp"
        android:layout_marginRight="16dp"
        android:layout_weight="1"
        android:backgroundTint="@color/divider"
        android:hint="@string/search"
        android:imeOptions="actionSearch"
        android:inputType="text"
        android:textColorHint="@color/text_color_placeholder" />
</merge>