title: Include jar file on .apk
body: <p>I'm developing an application that use Google messaging. Hence, I need to include the gcm.jar in the final .apk file.</p>
  
  <p>I added the jar file in Eclipse using project properties but still I don't think the file included in .apk file because I'm getting the message:</p>
  
  <pre><code>java.lang.NoClassDefFoundError: com.google.android.gcm.CMRegistrar
  </code></pre>
  
  <p>Hence, I wonder how to include the jar in .apk file?</p>