Trying to make my program wait/sleep without interrupting the rest of my code in java

Ive been trying to make my program register a bunch of android listeners for the phones sensors, wait for 2 seconds to allow them to collect data, then unregister the listeners. However, every time i run the code, it simply throws out an error and continues. What could i be doing wrong?

try {
        waitThread(2000);
        wait();
    }catch (Exception exception){
        Log.e("Error", "Could not wait1");
    }

==================

public void waitThread(int millis){
    new Thread(new Runnable() {
        @Override
        public void run() {
            try {
                Thread.sleep(millis);
                notifyAll();
            }catch (Exception exception){
                Log.e("Error", "Could not wait");
            }
        }
    });
}