Caeser wrote:
> How to upgrade Android app without losing data ? 

Upgrading an Android app does not lose data by default.

> If app is already installed on device, it is not
> allowing the same app to install again. and one need to uninstall then
> reinstall app again.

You can upgrade an application in-place without removing any of that
application's data (e.g., preferences, databases).

-- 
Mark Murphy (a Commons Guy)
http://commonsware.com | http://twitter.com/commonsguy

Android Training...At Your Office: http://commonsware.com/training

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