private void _crossfadeViews(final View begin, View end, int duration) {
    _crossfadeRunning = true;

    end.setAlpha(0f);
    end.setVisibility(View.VISIBLE);
    end.animate().alpha(1f).setDuration(duration).setListener(null);
    begin.animate().alpha(0f).setDuration(duration).setListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            begin.setVisibility(View.GONE);
            _crossfadeRunning = false;
        }
    });
}