AndroidAPS/app/src/main/res/layout/rileylink_status_history.xml

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/constraintLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="info.nightscout.androidaps.plugins.PumpCommon.hw.rileylink.dialog.RileyLinkStatusHistory">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <TextView
            android:id="@+id/rileylink_historystatus"
            android:layout_width="match_parent"
            android:layout_height="10px"
            android:layout_below="@id/medtronic_historytop"
            android:layout_gravity="center_horizontal"
            android:gravity="center_horizontal" />

        <android.support.v7.widget.RecyclerView
            android:id="@+id/rileylink_history_list"
            android:layout_width="match_parent"
            android:layout_height="fill_parent"
            android:layout_below="@+id/rileylink_historystatus" />

    </LinearLayout>

</android.support.constraint.ConstraintLayout>