How to force Admob to refresh on Android

Question

I have an app with Admob ads on it but I find that when I use it the ad almost never refreshes because I don\'t change activities, instead I just update a text view when but

Answer 1

    //New AdRequest 

    ScheduledExecutorService scheduleTaskExecutor = Executors.newScheduledThreadPool(5);


scheduleTaskExecutor.scheduleAtFixedRate(new Runnable() {
  public void run() {
        runOnUiThread(new Runnable() {
            public void run() {
                 AdRequest adRequest = new AdRequest.Builder().build();
                adView.loadAd(adRequest);
            }
        });
    }

}, 0, 30, TimeUnit.SECONDS);