samples/wearable/Notifications/Application/src/main/res/layout/background_picker.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/bg_picker_label"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="@dimen/editor_item_padding_top"
        android:paddingTop="@dimen/editor_item_padding_top"
        android:paddingBottom="@dimen/editor_item_padding_top"
        android:text="@string/bg_picker_label"/>

    <HorizontalScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <LinearLayout
            android:id="@+id/bg_picker_container"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
            <ImageView
                android:id="@+id/bg_none"
                android:background="@drawable/selected_background"
                style="@style/bg_picker"
                android:layout_width="@dimen/image_picker_item_side"
                android:layout_height="@dimen/image_picker_item_side"
                android:src="@android:color/background_light"/>
            <ImageView
                android:id="@+id/bg1"
                style="@style/bg_picker"
                android:layout_width="@dimen/image_picker_item_side"
                android:layout_height="@dimen/image_picker_item_side"
                android:tag="bg_1"
                android:src="@drawable/bg_1"/>
            <ImageView
                android:id="@+id/bg2"
                style="@style/bg_picker"
                android:layout_width="@dimen/image_picker_item_side"
                android:layout_height="@dimen/image_picker_item_side"
                android:tag="bg_2"
                android:src="@drawable/bg_2"/>
            <ImageView
                android:id="@+id/bg3"
                style="@style/bg_picker"
                android:layout_width="@dimen/image_picker_item_side"
                android:layout_height="@dimen/image_picker_item_side"
                android:tag="bg_3"
                android:src="@drawable/bg_3"/>
            <ImageView
                android:id="@+id/bg4"
                style="@style/bg_picker"
                android:layout_width="@dimen/image_picker_item_side"
                android:layout_height="@dimen/image_picker_item_side"
                android:tag="bg_4"
                android:src="@drawable/bg_4"/>
            <ImageView
                android:id="@+id/bg5"
                style="@style/bg_picker"
                android:layout_width="@dimen/image_picker_item_side"
                android:layout_height="@dimen/image_picker_item_side"
                android:tag="bg_5"
                android:src="@drawable/bg_5"/>
        </LinearLayout>

    </HorizontalScrollView>

</LinearLayout>