ViewUtil.java 文件源码

private static Animator createColorAnimator(Object target, String propertyName, @ColorInt int startColor, @ColorInt int endColor) {
    ObjectAnimator animator;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        animator = ObjectAnimator.ofArgb(target, propertyName, startColor, endColor);
    } else {
        animator = ObjectAnimator.ofInt(target, propertyName, startColor, endColor);
        animator.setEvaluator(new ArgbEvaluator());
    }

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        animator.setInterpolator(new PathInterpolator(0.4f, 0f, 1f, 1f));
    }
    animator.setDuration(PHONOGRAPH_ANIM_TIME);
    return animator;
}