If you want to enable the Android log, the first thing you need to do is make the LogCar View visible.
Eclipse > Window > Customize Perspective > Shortcuts > Submenus : Show View > Categories : Android > LogCat
To open the view, clicking Window > Show View > LogCat
In your Android project, import android.util.Log;
Then using the static variable Log to keep trace of your target.
Ex: Log.d("DEBUG", "message");
 Driving Direction (Route Path)
 Android – Update current location by LocationProvider