text: <?xml version="1.0" encoding="utf-8"?>
  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent" >
  
      <TextView
          android:id="@+id/textView1"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_alignParentTop="true"
          android:layout_centerHorizontal="true"
          android:layout_marginTop="80dp"
          android:gravity="center"
          android:text="@string/location_text"
          android:textAppearance="?android:attr/textAppearanceMedium" />
  
      <Button
          android:id="@+id/disable_tracking_button"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_below="@+id/textView1"
          android:layout_centerHorizontal="true"
          android:layout_marginTop="38dp"
          android:onClick="disableTracking"
          android:text="@string/disable_tracking_button" />
  
  </RelativeLayout>