正确调用方法“ buildRoadOverlay”

Question

I want to call the method buildRoadOverlay (Method is on the bottom of this post) from OSMdroid. How do I set the parameters correctly?

This method builds a route on a map between two waypoints. It works, as long as I leave out color and width when calling the method. Now I want the color to be green and the width to be 20dp.

This is how I tried it:

Polyline roadOverlay = RoadManager.buildRoadOverlay(road, 7667507, 20);

The app starts, no errors, but the Line RoadOverlay does not get drawn anymore. Either that or it is invisible. I am not sure.

The method I want to call:

public static Polyline buildRoadOverlay(Road road, int color, float width){
        Polyline roadOverlay = new Polyline();
        roadOverlay.setColor(color);
        roadOverlay.setWidth(width);
        if (road != null) {
            ArrayList<GeoPoint> polyline = road.mRouteHigh;
            roadOverlay.setPoints(polyline);
        }
        return roadOverlay;
    }

Answer 1

color is an Android Color . width is a float, in pixels. So try:

Polyline roadOverlay = RoadManager.buildRoadOverlay(road, Color.GREEN, 20.0f);

Putting some transparency on road shape is recommended, so that street names for instance remain visible. So this will be better:

Polyline roadOverlay = RoadManager.buildRoadOverlay(road, 0x8000FF00, 20.0f);

(and yes, I apologize for the javadoc of this method. I will improve it)