View的背景颜色渐变变化

属性动画去操作

ValueAnimator colorAnim = ObjectAnimator.ofInt(topBar,"backgroundColor",        getActivity().getResources().getColor(R.color.green_new)        ,  getActivity().getResources().getColor(R.color.trans2));colorAnim.setDuration(3000);colorAnim.setEvaluator(new ArgbEvaluator()); colorAnim.setRepeatCount(ValueAnimator.INFINITE);colorAnim.setRepeatMode(ValueAnimator.REVERSE);colorAnim.start();