If you are planning about to develop a Android apps for your City which will acting as a guide for your city. Then , this application is for you. Using this application user will be able to find the restaurant ,hotels, bank etc list of this city.Just, following some guide you can develop this application. Then if you want to submit it on Google Play , you can. Also, you can use it as business purpose using Google Admob or Local Ad.

Demo: http://codecanyon.net/item/city-guide-android-application/4069365