AndroidAPS/app/src/main/res/layout/danars_blescanner_activity.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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".plugins.pump.danaRS.activities.BLEScanActivity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:background="@color/activity_title_background"
        android:orientation="horizontal"
        android:padding="5dp">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:contentDescription="@string/pairing"
            android:src="@drawable/ic_bluetooth_white_48dp" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:layout_gravity="center"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            android:text="@string/pairing"
            android:textAlignment="center"
            android:textAppearance="?android:attr/textAppearanceLarge" />

    </RelativeLayout>

    <ListView
        android:id="@+id/danars_blescanner_listview"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <TextView
        android:id="@+id/danars_blescanner_nodevice"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center"
        android:text="@string/danars_nodeviceavailable"
        android:textColor="#FF7F8288" />

</LinearLayout>