How many threads are used to load an webpage in webview?

Question

I implemented a custom version of cookiemanage to overcome the problem of cookies being stored retrived in the same place for webview (when assigning a custom cookiemanager to default cookiehandler before initializing webview ).
This custom class uses thread local to create a new store for each thread, so i could have varius webview instance not using the same cookiestore.Well, it doesn´t work because
webview apperantly creates about 20 threads for loading (login) a webpage.I´m guessing webview uses several threads to load an webpage, because in my custom implementation of cookiemanager each thread that request
CookieHandler.getdefault() get a new cookie store, i did this with threadlocal.
My question to the experts is ::
- Is my teory correct and weview creats several threads to load a page or i´m missing something where?
- Also having my problem is there an way i can restrict webview so it only creates one thread or at least only one thread that call cookiemanager.getDefault()?
Even not knowing the answers to the above , any details on webview inside working relating thread could be helpfull.
Many Thanks
André

Answer 1

To print all Threads;
class Equitus {
    public static void main(String[] arg) {
        new Equitus().run();
    public void run() {
        ThreadGroup tg = Thread.currentThread().getThreadGroup();
        for(ThreadGroup parent; (parent=tg.getParent()) != null; tg=parent) ;
        Thread[] threads;
        do {
            threads = new Thread[tg.activeCount()];
        } while (tg.enumerate(threads)!=threads.length);
        System.out.println(java.util.Arrays.toString(threads));
}