Animation : View/Layout AlphaAnimation

AlphaAnimation alphaAnimation = new AlphaAnimation(0.0f, 1.0f);
alphaAnimation.setDuration(250);
alphaAnimation.setRepeatMode(1);
alphaAnimation.setAnimationListener(new AnimationListener(){

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

    }

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

    }

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

    }

});
contentView.startAnimation(alphaAnimation);