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Mark a map

Hi my name's Salvatore and i have to develope a project for my graduation final paper, thx for the time u will decide to spend to help me.

for my project i have to develope a little navigator that shows a path from 2 points. First point is gaven by the local position of the user, provided by a Service that runs in background and everytime refreshes local position, 2 is gaven by tapping on map and placing a marker on map. The app let u navigate so it has to refresh the remaining path by deleting the path already done.

This is the code i've already made. I need methods that show u a path when u mark a location and to refresh the local position to delete the path already made.

http://paste.ofcode.org/DZWsUbkTKw42QWXVFK9RJb

and this is what this produce after i tapped on map
https://www.dropbox.com/s/n9htvd5te64k3f2/Screenshot_2015-07-06-02-41-43.png?dl=0

this is what it should produce and is taken from Google Maps.
https://www.dropbox.com/s/z34os52nqnzwctc/Screenshot_2015-07-06-02-47-16.png?dl=0

without all the buttons and functions.
Just the map with a marker for the destination and user, and a yellow path that refresh itself

Pleas help me i have to finish in two days
Thx for your time
 
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