Animate views with a nice fadeIn effect before drawing. Src : https://medium.com/@Sserra90/android-writing-a-compound-view-1eacbf1957fc#.kpfvw4b7n

animateBeforeDraw.java

//Animate views with a nice fadeIn effect before drawing
        getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
            @Override
            public boolean onPreDraw() {

                getViewTreeObserver().removeOnPreDrawListener(this);

                if(mPOI.hasFacebookRating())
                    ViewCompat.animate(mFacebookTv).alpha(1).setDuration(500);
                    
                return false;
            }
        });
    }