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

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="info.nightscout.androidaps.plugins.Overview.Dialogs.CalibrationDialog">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:padding="10dp">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:padding="10dp"
                android:text="@string/overview_calibration_bg_label"
                android:textAppearance="?android:attr/textAppearanceLarge" />

            <TextView
                android:id="@+id/overview_calibration_units"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:layout_marginBottom="10dp"
                android:textAppearance="?android:attr/textAppearanceSmall" />

            <info.nightscout.utils.NumberPicker
                android:id="@+id/overview_calibration_bg"
                android:layout_width="130dp"
                android:layout_height="40dp"
                android:layout_gravity="center_horizontal"
                android:layout_marginBottom="20dp"
                android:layout_marginLeft="30dp"
                android:layout_marginRight="30dp" />


            <include layout="@layout/mdtp_done_button" />

        </LinearLayout>

    </ScrollView>

</FrameLayout>