public Location getInstanceLocation() {
    if (locationTracker == null) {
        Filter filter = null;
        try {
            filter = context.createFilter(Location.INSTANCE_FILTER);
        } catch (InvalidSyntaxException e) {
            // ignore this. It should never happen as we have tested the
            // above format.
        }
        locationTracker = new ServiceTracker(context, filter, null);
        locationTracker.open();
    }
    return (Location) locationTracker.getService();
}