I am looking for a GPS tracker that be able to show path on a (phone) map without Internet, please help with any clues.
You have two and one half options as far as I am aware:
AI2 Flat Map Tutorial. Use a Canvas to make a map and spot your location.
Use a Map component and make your tracker. Map caches map tiles for areas previous loaded using WIFI. See Offline osm Map - #2 by SteveJG.
Works something like this
Use the LocationSensor. The gps hardware does not need an internet to determine your location. Save a list of coordinates to a List and save in a TinyDb. Recall the list and post your previous locations .. When you get home and access to WIFI post those locations using a LineString and Map and you can see the track of where you have been
Hope this helps.
Thank you. I'll check it.
Happy new year!