Check out the onTap method for the overlay class: http://code.google.com/android/add-ons/google-apis/reference/index.html
When someone taps the overlay it will call the onTap method, with GeoPoint P having the point that has been tapped. This won't display all the information that the google maps app displays from a favorites, though. I don't think that information is part of the google maps API, but rather is proprietary to google maps app. I could be wrong. You can display your own information about a favorites, when it's tapped with the onTap method though.
EDIT: Of course you could do most of the same stuff the google maps app does. From the GeoPoint information you could display the address when it is tapped. Put a :"Driver To" link on the map for them to click on, and then call the navigation app with an Intent, specifying the address in the parameters.
2nd EDIT: I wrote a small gps program once, here is the code I used to translate a lat/lon location to an address:
First you would get the lat and longitude from the GeoPoint provided in the onTap method of your overlay:
int lat = p.getLattitudeE6();
int long = p.getLongitudeE6();
Then create a Geocoder object:
Geocoder geoCoder = new Geocoder (getApplicationContext());
address="Could Not determine location."; //initinalize the address to not found
try {
//Use android.location.Location to get an address from a geoCoder object.
android.location.Location locs = geoCoder.getFromLocation (lat, long, 10); // get the address for the lat and long from the GeoPoint
if (locs.get(0) !=null) address=locs.get(0).toString(); //get the string representation of the address from locs
} catch (Exception e) {
//System.out.println ("location: "+e);
}
— modified on Feb 12, 2011, 6:18:26 AM
