How to find my application's user in google map?

I am developing 开发者_JS百科an application,I would like publish my application in android market. I want to find what are the user using my application and his location point out in Google map,How to find my user for my application,How to possible?

Thanks all

You need a server, which will collect the information from your app. And the app after installation will send the location info( if it is available ) through internet to your server. After you have the location info, you will be able to put the marks on google maps.