manual update functionality for android app

I am working on Titanium-3.1.1 for android-3.0:

I want the detail description for android app updates on device when latest version of same app updated on google play store. Give the alert for update available and also overwrite/update/upgrade installed app of device with latest version from google play store.

I have change the TiApp.xml as follow:

<android xmlns:android="http://schemas.android.com/apk/res/android">
   <manifest android:versionCode="3" android:versionName="1.05">
   </manifest>
</android>

. Any Solutions?