RelativeLayout rl = (RelativeLayout)findViewById(R.id.crpl_bars);

        AlphaAnimation anim = (AlphaAnimation) AnimationUtils.loadAnimation(this, R.anim.fade_in);

        anim.setRepeatMode(Animation.RESTART);
        anim.setRepeatCount(Animation.INFINITE);
        LayoutAnimationController controller = new LayoutAnimationController(anim, 0.5f);

        rl.setLayoutAnimation(controller);
        rl.setLayoutAnimationListener(new AnimationListener() {

            @Override
            public void onAnimationStart(Animation animation) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }

            @Override
            public void onAnimationEnd(Animation animation) {
                // TODO Auto-generated method stub

            }
        });

        rl.startLayoutAnimation();