Android: include build number and date

gistfile1.txt

    <property environment="env"/>
    <condition property="build.number" value="${env.BUILD_NUMBER}" else="unknown">
        <isset property="env.BUILD_NUMBER"/>
    </condition>
    <exec command="date" outputproperty="build.date"/>


    <target name="update-buildinfo">
        <echo>updating build number and date to ${build.number} and ${build.date}</echo>
        <echo file="res/values/buildinfo.xml"
>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;resources&gt;
    &lt;string name="build_number"&gt;${build.number}&lt;/string&gt;
    &lt;string name="build_date"&gt;${build.date}&lt;/string&gt;
&lt;/resources&gt;
</echo>
    </target>