code: public void animateHeart(View imageLovedOn, View imageLovedOff, boolean on) {
          imageLovedOn.setVisibility(View.VISIBLE);
          imageLovedOff.setVisibility(View.VISIBLE);
  
          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1) {
              viewPropertyStartCompat(imageLovedOff.animate().scaleX(on ? 0 : 1).scaleY(on ? 0 : 1).alpha(on ? 0 : 1));
              viewPropertyStartCompat(imageLovedOn.animate().scaleX(on ? 1 : 0).scaleY(on ? 1 : 0).alpha(on ? 1 : 0));
          }
      }
docs: helper method to animate the heart view
  
  @param imageLovedOn
  @param imageLovedOff
  @param on