The following code snippet will blink the ImageView . Set the background of ImageView as Transparent.
Animation animation = new AlphaAnimation(1, 0); //to change visibility from visible to invisible
animation.setDuration(1000); //1 second duration for each animation cycle
animation.setInterpolator(new LinearInterpolator());
animation.setRepeatCount(Animation.INFINITE); //repeating indefinitely
animation.setRepeatMode(Animation.REVERSE); //animation will start from end point once ended.
imageButton.startAnimation(animation); //to start animation
