// make custom spinner (use icon image)
<TextView
    android:id="@+id/spinner_first"
    android:layout_width="0dp"
    android:layout_height="36dp"
    android:layout_weight="1"
    style="?android:attr/spinnerItemStyle"
    android:background="@drawable/spinner_back"
    android:drawableRight="@drawable/icon_search_more"
    android:drawableEnd="@drawable/icon_search_more"/>