Distance and Navigation

Need a Simple Android project with Source Code. Only 3 Screens 1) Screen which will take Source and Destination, Then Click a Start Button 2) Screen which shows Map with Source and Destination and a TextView with Distance Traveled (This should be changes as we move), One Button to Complete the Ride and One more textview to show the Total Distance traveled when you click the Complete Button. Please note this should be actual distance travelling. 3) On the second screen there should be a Navigation Icon, When clicked on this It should take to the Mobile Maps App with the the Navigation but as this App opens in the background the Distance Calculation should work and When I come back from the Navigation App it should show the proper Distance. For someone who has worked earlier with Maps this should be very easy and should be able to complete in no time.