osmdroid-mapsforge: Unable to add marker and draw poly line on the map

[vidhyablrgithub]

Marker m = new Marker(mMapView);
m.setTextLabelBackgroundColor(2);
//m.setTextLabelFontSize(fontSizeDp);
m.setTextLabelForegroundColor(6);
m.setTitle("hello world");
//must set the icon to null last
m.setIcon(null);
m.setPosition(new GeoPoint(x,y));
mMapView.getOverlays().add(m);

I am unable to add marker. It does not show up on the map. Please help.

[spyhunter99]

does the map show up at all?

[LostRat]

Include this somewhere to force redraw (maybe only required after deleting Marker?):

mMapView.invalidate();