Polyline roadOverlay = RoadManager.buildRoadOverlay(road, Color.RED, 5); errors because it is incompatible. My Polyline import is org.osmdroid.api.Polyline; but it needs to be import org.osmdroid.views.overlay.Polyline; . It's all in the versioning but i don't know what version to download. My library versions are
osmbonuspack_v6.0
osmdroid-android-5.0
slf4j-android-1.7.21
Apparently it really it's because of the version. Osmdroid-android should be 5.2 and above. The version of 5.2 will be downloaded here.