nanoHTTPD - How to run as a single background thread in Android?

Question

My application is to use nanoHTTPD as an alternative to pressing buttons and keying in text on an Android UI for automation and regression test I currently have a main UI thread and a customized nanoHTTPD running in a different thread. Consider each HTTP request will be serviced very quickly in the UI thread. I think my model could be simplified if I could force nanoHTTPD to NOT start a new thread for each incoming request. I would not mind the blocking I/O model at all for my use cases. I see there is a pluggable strategy for threading. Can the below be modified such that only one web request is active at a time (blocking model)?

public static class DefaultAsyncRunner implements AsyncRunner {
    private long requestCount;

    @Override
    public void exec(Runnable code) {
        ++requestCount;
        Thread t = new Thread(code);
        t.setDaemon(true);
        t.setName("NanoHttpd Request Processor (#" + requestCount + ")");
        t.start();
    }
}

I could probably also do more elaborate message queues but "dumbing-down" to nanoHTTPD in one thread seems simplest.