Geocoder is not working in android

I am working on a program that takes address as an input from user and navigates the google map to that particular location,i have used getFro开发者_开发技巧mLocationName() method of geocoder but not getting the output, I am little afraid because i am not able to understand the meaning of the below phrase given in the android site

"The Geocoder class requires a backend service that is not included in the core android framework. The Geocoder query methods will return an empty list if there no backend service in the platform. Use the isPresent() method to determine"

if that back end service is not present then how to get it..

but even when i try to use isPresent() method it is giving me compilation error,

plz suggest me, response will be very much appreciated