There are several ways Carlos
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Use an ActivityStarter and intents to open Google’s Navigator app. This link provides basic information https://groups.google.com/forum/#!msg/mitappinventortest/3d7bFyGM508/pNsqAb9hBQAJ
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HOW TO use the new Map Control to plot a route on a map and post driving distance and time for that path. is useful too if you can be happy with a map showing the route without the turn by turn directions.
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Again a different way is OpenStreetMap without the Map Component
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If you are experienced with JSON and willing to get a Google Map API, you can use the Google Directions API .
Is this what you want to do?