i use the here rest api every day: standard map tiles, aerial, geocoding, poi's, routing. plus leaflet. i've cobbled together a video for you. too big to upload here, so go to
http://www.georgieapps.com/tuiles.mp4 to download. it shows most of the features. the map tiles in the video happen to be osm, but the user can switch to here maps on the fly. all the views (webview, listview, dialogs, etc) and webviewextras are b4a. no java, but certainly javascript for the webview. if you were looking to use, eg, osmdroid with here, then you would have to have more knowledge. sorry, not sure what you think a wrapper will do for you.