Question

I would like to get a recurring call back to invalidate a view. I am sure there is a neat way to do this. I am currently doing this and would like a neater / better solution if possible?

new Thread()
    {
        @Override
        public void run()
        {
            while (!Thread.currentThread().isInterrupted())
            {
                handler.post(new Runnable()
                {
                    public void run()
                    {
                        BannerButton.this.invalidate();
                    }
                });
                try
                {
                    Thread.sleep(50); // yields 20 fps
                } catch (InterruptedException e)
                {
                    Thread.currentThread().interrupt();
                }
            }
        }
    }.start();

For a single shot timer on the UI thread, I do this: (But I cant find a way to do this with repeats)

(new Handler()).postDelayed(new Runnable()
    {
        @Override
        public void run()
        {
            // Do stuff
        }
    }, SPLASH_SHOW_TIME);

Timer looked good, but it calls on a background thread.

Thanks.

Answer 1

Look at the View.postInvalidate() method. This is different from invalidate() as you can do it from any Thread you want. It just posts an invalidate() message in the UI thread Looper

Concerning your second question simply post with some delay the same Runnable at the end of the Runnable in your Handler