Hi, The short answer is It cant be done that way. Or at least not in an easy way.
Thats because SQLite is designed to work with just a single process. So, the only way to make this wor is if you create a "Database server APP" a single app runing in the android device doing the access to SQLite databases and manage the comunication between PCs and server via http.
you have this options:
1 Develop an pseudo Android Server app to use concurrent conections in SQLite, you can exchange data with json like in
this example, the lib you have to learn its
2. Use a Linux distro for raspberry pi, this way you can make the app in B4J a web app with concurrent access.
[WebApp] Concurrent access to SQLite databases
3. Use a Linux distro for raspberry pi and install SQL server.
In any case you have to learn HttpUtils2