Android Wear BoxInsetLayout doesn't work on Moto 360

Question

I'm trying to make an Android Wear app that has two pages. I created:

• InsetActivity
• GridViewPager
• FragmentGridPagerAdapter
• Two classes extended from CardFragment
• Two custom layout files that use BoxInsetLayout

One of the layout files is as follows:

<android.support.wearable.view.BoxInsetLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/history_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/background">

    <FrameLayout
        android:id="@+id/frame_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_box="all">

        <android.support.wearable.view.WearableListView
            android:id="@+id/history_list"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

        </android.support.wearable.view.WearableListView>
    </FrameLayout>
</android.support.wearable.view.BoxInsetLayout>

InsetActivity.isRound() returns true, but BoxInsetLayout.isRound() returns false.

Two error messages are shown in console:

E/RecyclerView﹕ No adapter attached; skipping layout

What's wrong?