On Wed, Feb 1, 2012 at 7:07 AM, gauri <gauri.v...@gmail.com> wrote:

> When user installs my game, he must have to do registration for the app
> and for that serial number is must.
>

Um ... why? Do you not like to sell software?


> Is there any way in android market for sending/providing information(like
> serial number) to such user who has purchased the app?
>

You probably want the LVL.

Or can we get any information of user like email id for communicating with
> him?
>

Google Checkout has an email address you can use that forwards to the user.

-------------------------------------------------------------------------------------------------
TreKing <http://sites.google.com/site/rezmobileapps/treking> - Chicago
transit tracking app for Android-powered devices

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