app/src/main/res/layout/activity_calibration.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:background="@color/colorFP2Background">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:background="@color/colorFP2HeaderBackground">

        <TextView
            android:text="@string/app_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:fontFamily="sans-serif-light"
            android:textColor="@color/colorPrimary"
            android:textSize="30sp"/>

    </RelativeLayout>

    <ViewFlipper
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/viewFlipper"
        android:background="@color/colorFP2Background" />

</LinearLayout>