Start the youtube player in a simple way

Don't spend time on reinventing the wheel. If your app needs to play a youtube video, just start the youtube player like this:

startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.youtube.com/watch?v=cxLG2wtE7TM")));

Reloading a WebView every x seconds

If you load a page using WebView and want to reload that page to show the latest updates etc. java has an easy solution for that:

ScheduledExecutorService exec = Executors.newSingleThreadScheduledExecutor();
        exec.scheduleAtFixedRate(new Runnable() {
          @Override
          public void run() {
              Shout.loadUrl("http://www.bengaard.com/OB/shoutstart.php?konto="+konto);
          }
        }, 10, 20, TimeUnit.SECONDS);

So this piece of code simply reloads the page every 20 seconds with a 20 second initial delay which is very ideal for updating my shoutbox. Of course, you can change the WebView with whatever code you need to execute between fixed intervals.

Login using your Google account

Since 99,99% of all android users have a gmail account it can sometimes be useful to use that email address as a login or username for the users of your app. Here's how to do it:

protected AccountManager accountManager;

accountManager = AccountManager.get(getApplicationContext());
        Account[] accounts = accountManager.getAccountsByType("com.google");
        

The variable accounts will now hold an array of all the google accounts ever used on the phone. So to get the first account/email address registered on the phone try something like

konto = accounts[0].name;

You can then use the account name/email address for login, shoutbox name, etc. etc.