1<RelativeLayout
2    xmlns:android="http://schemas.android.com/apk/res/android"
3    xmlns:lb="http://schemas.android.com/apk/res-auto"
4    android:layout_width="match_parent"
5    android:layout_height="match_parent"
6    >
7  <androidx.leanback.widget.VerticalGridViewEx
8      android:id="@+id/gridview"
9      android:layout_width="match_parent"
10      android:layout_height="match_parent"
11      android:clipToPadding="false"
12      android:focusable="true"
13      android:focusableInTouchMode="true"
14      android:background="#00ffff"
15      android:horizontalSpacing="12dip"
16      android:verticalSpacing="24dip"
17      lb:numberOfColumns="3"
18      lb:columnWidth="150dip"
19      android:paddingBottom="12dip"
20      android:paddingLeft="12dip"
21      android:paddingRight="12dip"
22      android:paddingTop="12dip" />
23</RelativeLayout>
24