This is my first time using stackoverflow because I am really desperate to solve this issue.
I am developing an app that contains information about bus stops in my country (Google maps does not work if I try to go from X to Y on a bus) so I decided to do it myself. I already tracked every stop of many buses.
I show each bus stop as overlays in my osmdroid map view, I get this information from a internal database that as I said I collected the information and is not online.
What I want to do now, is to get the user's location (lat, long) and tell him/her the closets bus stops to him/her location. I already looked at Osmdroid bonuspack and the POI feature, but what I understood is that these places (restaurants, bus stops, hospitals, etc) are already on a server.
How can I implement a POI function on my application with local information. I would appreciate any help, this is something I want to do for my community.
Thank you everyone and sorry for my poor English. I am doing my best.
You already have the coordinates of bus stops in your database, and they are displayed in an overlay. You can also get the current users location. What you want to achieve is a matter of calculating the geographical distance between two points (the user's location and a bus stop).
You don't have to implement a suitable formula yourself, e.g. have a look at the GeoPoint class. There's a distanceTo(final IGeoPoint other) method. You can instantiate a GeoPoint with known coordinates or simply use Overlay methods.
You could also achieve the same thing by querying only the bus stops that are within a certain radius of the user's location (maybe have a look at the BoundingBox)
If you want to use libraries like the BonusPack, look at the provider implementations. You could simply write your own provider for your bus stops. Have a look at e.g. this one.