samples/wearable/DelayedConfirmation/Wearable/src/main/res/layout/main_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.wearable.view.BoxInsetLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_height="match_parent"
    android:layout_width="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:background="@color/grey"
        app:layout_box="top">

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:onClick="onStartTimer"
            android:text="@string/start_timer"/>

        <android.support.wearable.view.DelayedConfirmationView
            android:id="@+id/delayed_confirmation"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:src="@drawable/ic_launcher"
            app:circle_color="@color/blue"
            app:circle_radius="@dimen/circle_radius"
            app:circle_radius_pressed="@dimen/circle_radius_pressed"
            app:circle_padding="@dimen/circle_padding"
            app:circle_border_width="@dimen/circle_border_normal_width"
            app:circle_border_color="@color/white"/>

    </LinearLayout>
</android.support.wearable.view.BoxInsetLayout>