@Override
    public void showConfirmationView() {

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
            GUIUtils.showViewByRevealEffect(mConfirmationContainer,
                mFabButton, GUIUtils.getWindowWidth(this));

         else
            GUIUtils.startScaleAnimationFromPivot(
                (int) mFabButton.getX(),(int) mFabButton.getY(),
                mConfirmationContainer, null);

        animateConfirmationView();
        startClosingConfirmationView();
    }
Show a confirmation view with a reveal animation if the android version
is v21 or higher, otherwise the view visibility is set to visible without
an animation
HackVG/app/src/main/java/com/hackvg/android/views/activities/MovieDetailActivity.java