Android : Service to fetch data from a server

Once logged in, my application should control without interruption in a database on a server if there is a tuple with the id of the taxi logged in. When found, the service has to stop and call an activity to display the information of the person who booked the taxi. Once the booking is canceled will have to start the service. What is the best solution? Should I use an intent service? you can give me an example of how I use the service with the code? Thanks in advance