AndroidAPS/wear/src/main/res/layout/round_activity_home.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" tools:context=".watchfaces.Home" tools:deviceIds="wear_round"
    android:background="@color/black"
    android:id="@+id/main_layout">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:textAlignment="center"
        android:weightSum="1">

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:textAlignment="center"
            android:paddingTop="15dp"
            android:weightSum="1"
            android:layout_gravity="center_horizontal"
            android:gravity="center_horizontal"
            android:layout_marginTop="-5dp">

            <TextView
                android:id="@+id/sgv"
                android:textSize="41sp"
                android:text="---"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#FFFFFF"
                android:layout_gravity="center_horizontal|bottom"
                android:gravity="bottom|right"
                android:paddingRight="5dp"
                android:layout_marginBottom="-2dp"
                android:paddingTop="-2dp" />

            <LinearLayout
                android:orientation="vertical"
                android:layout_width="wrap_content"
                android:layout_height="fill_parent"
                android:weightSum="1"
                android:textAlignment="center"
                android:baselineAligned="false"
                android:layout_gravity="center_horizontal">

                <TextView
                    android:id="@+id/direction"
                    android:textSize="30sp"
                    android:text="--"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:textColor="#FFFFFF"
                    android:textAlignment="center"
                    android:layout_gravity="center_horizontal|bottom"
                    android:gravity="center_horizontal|bottom"
                    android:layout_marginBottom="-5dp"
                    android:layout_marginTop="-2dp"
                    android:textStyle="bold" />

                <TextView
                    android:id="@+id/delta"
                    android:textSize="10sp"
                    android:text="--- mg/dl"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:textColor="#FFFFFF"
                    android:layout_gravity="bottom"
                    android:gravity="center_horizontal|bottom"
                    android:textStyle="bold" />

            </LinearLayout>

        </LinearLayout>

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:background="@color/light_grey"
            android:id="@+id/secondary_layout"
            android:padding="1dp">

            <LinearLayout
                android:orientation="horizontal"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAlignment="center"
                android:layout_gravity="center_horizontal">

                <TextView
                    android:id="@+id/timestamp"
                    android:textSize="8sp"
                    android:text="-- Minutes ago"
                    android:layout_width="wrap_content"
                    android:textAlignment="center"
                    android:textColor="#000000"
                    android:layout_height="wrap_content" />
                <TextView
                    android:id="@+id/uploader_battery"
                    android:textSize="8sp"
                    android:text="Uploader: ---%"
                    android:layout_width="wrap_content"
                    android:textAlignment="center"
                    android:textColor="#000000"
                    android:paddingLeft="10sp"
                    android:layout_height="wrap_content" />
                <TextView
                    android:id="@+id/raw"
                    android:textSize="8sp"
                    android:text=""
                    android:layout_width="wrap_content"
                    android:textAlignment="center"
                    android:textColor="#000000"
                    android:paddingLeft="10sp"
                    android:layout_height="wrap_content" />
                <TextView
                    android:id="@+id/externaltstatus"
                    android:textSize="8sp"
                    android:text="S: no status"
                    android:layout_width="wrap_content"
                    android:textAlignment="center"
                    android:textColor="#000000"
                    android:paddingLeft="10sp"
                    android:layout_height="wrap_content" />

            </LinearLayout>

        </LinearLayout>

        <TextView
            android:id="@+id/watch_time"
            android:textSize="30sp"
            android:text="12:00"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:textColor="#FFFFFF"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAlignment="center"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="-2dp"
            android:layout_marginBottom="-3dp" />

        <lecho.lib.hellocharts.view.LineChartView
            android:id="@+id/chart"
            android:layout_width="match_parent"
            android:layout_height="77dp"
            android:layout_gravity="bottom"
            android:gravity="center_horizontal|top" />

    </LinearLayout>

</RelativeLayout>