title: How to write build time stamp into apk
body: <ol>
  <li>Making some changes in Android Contacts  package</li>
  <li>Using <code>mm</code> (make) command to build this application  </li>
  </ol>
  
  <p>Because I have to change and build this app again and again, so I want to add a build time stamp in the <code>Contacts.apk</code> to check the build time when we runn it in the handset.</p>
  
  <p>As we know, when we run <code>mm</code> command, the <code>Android.mk</code> (makefile) in Contacts package will be called. </p>
  
  <p>And now, we can get the build time using <code>date</code>-macro.</p>
  
  <p>But how we can write this build time stamp into a file that our application can read at runtime? </p>
  
  <p>Any suggestions?</p>