android - Draw path traced by device using maps api v2 -

i developing android application trace device movement.i able current location how can draw route set of points collected during trip

define list points.

list< latlng> points = new list< latlng>();

//add points in list

points.add(new latlng(lat1,lng1)); // point1  points.add(new latlng(lat2,lng2)); // point2 , on.

// define polylineoptions

polylineoptions polylineoptions = new polylineoptions();  polylineoptions.addall(points);  polyline route = googlemap.addpolyline(polylineoptions);

// marker use markeroptions

Error