activity_find_my_phone.xml

<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"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="org.kde.kdeconnect.Plugins.FindMyPhonePlugin.FindMyPhoneActivity">



    <Button
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:text="@string/findmyphone_found"
        android:textSize="50dp"
        android:id="@+id/bFindMyPhone"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />




</RelativeLayout>