item_order_header.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#F8F8F8"
    >
    <TextView
        android:id="@+id/tv_list_num"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text=""
        android:textSize="16sp"
        android:textColor="#888888"
        android:layout_marginTop="@dimen/dp_10"
        android:layout_marginStart="@dimen/dp_10"
        android:layout_marginBottom="5dp"
        />

</RelativeLayout>