How to share user location into google map in android?

I want to make application in which user is online through google account. and also can share it's locaton in google map. and also he/she can find his/her online friends through google map and chat with them.

How to sh开发者_如何学JAVAare my location to google map in android? How can implement this feature in my own android application?

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This application exists, its called Google Latitude