Using NanoHTTPD in Android

basic_file_nano_template

Add your index.html file to res/raw

Add dep to app gradle file:

    dependencies {
        implementation 'org.nanohttpd:nanohttpd-webserver:2.3.1'
    }

Java class file:
    import fi.iki.elonen.NanoHTTPD;
    public class BasicServer extends NanoHTTPD  {
    
        private Context mCtx;
    
        public BasicServer(Context ctx) throws IOException {
            super(8080);
            mCtx = ctx;
            start(NanoHTTPD.SOCKET_READ_TIMEOUT, false);
        }
    
    
        @Override
        public Response serve(IHTTPSession session) {
            String uri = session.getUri();
    
            if (uri.equalsIgnoreCase("/")) {
                return snapshot(session);
            }
    
            return newFixedLengthResponse(Response.Status.NOT_FOUND,MIME_PLAINTEXT,"Not Found");
        }
    
        private Response indexFile(IHTTPSession session) {
            InputStream x = mCtx.getResources().openRawResource(R.raw.index_html);
            return newFixedLengthResponse(Response.Status.OK,"text/html", x, 2038);
        }
    }