How to support devices with and without GPS?

My appl开发者_如何学编程ication designed to be used with GPS. But in some cases, there is no need for GPS(in office use) and would be fine on tablet.

Android Market won't let those tablets to download/install app because of manifest. Is there any way I can target both devices?

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You might want to look into submitting multiple APKs to the Marketplace. Then you can create two separate versions of the application with different requirements, and it will be completely invisible to the end user.