If I ever need to figure out which threads are running when testing with Espresso

dumpRunningThreads.java

private void dumpThreads() {
        int activeCount = Thread.activeCount();
        Thread[] threads = new Thread[activeCount];
        Thread.enumerate(threads);
        for (Thread thread : threads) {
            System.err.println(thread.getName() + ": " + thread.getState());
            for (StackTraceElement stackTraceElement : thread.getStackTrace()) {
                System.err.println("\t" + stackTraceElement);
            }
        }
    }