ANDROID PROJECT -google map :xml syntax error

I'm using Android for a project.

here is my code of xml file of google map

<RelativeLayout xmlns:android="http://ift.tt/nIICcg"
xmlns:tools="http://ift.tt/LrGmb4"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${relativePackage}.${activityClass}" >

<fragment android:id="@+id/maps_fragment" android:layout_width="match_parent"
    android:layout_height="match_parent" android:name="com.google.android.gms.maps.SupportMapFragment"/>
</RelativeLayout>

The error I am receiving is:

invalid page preference path: XML SYNTAX ERROR