Android GPS & Location service help

New to android development and trying to create map app that functions as such.

1) Launch mapview 2) Show an icon that represents the users current lo开发者_JAVA百科cation 3) Show icon's that represent local landmarks (example: gyms, restaurant) 4) When users taps any given landmark icon a popup displays name, address, and option to start GPS (turn by turn) direction.

Can this be done in android? Do I have to programmatically enter the lat & lon?

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Yes.This can be done in android.You can find the location through your gps or network(wi-fi or cellular network).But generally gps is pretty time consuming so you use a combination of both the gps and network to determine your location.This link will give you a better idea on how to get the user location http://developer.android.com/guide/topics/location/obtaining-user-location.html.

This is sample code on retrieveing the location.Remember to follow the above links and request for location updates.

 LocationManager locationManager= (LocationManager) getSystemService(context);
        Criteria criteria = new Criteria();
            criteria.setAccuracy(Criteria.ACCURACY_FINE);
            criteria.setAltitudeRequired(false);
            criteria.setBearingRequired(false);
            criteria.setCostAllowed(true);
            criteria.setPowerRequirement(Criteria.POWER_LOW);
            provider = locationManager.getBestProvider(criteria, true);
    Location location = locationManager.getLastKnownLocation(provider)

Here in the above code your latitude and longitude will be stored inside the variable location.Remember to add the location listener and request for location updates.