Animation从左边开始缩放

默认缩放是从中心点开始的，在网上找答案时发现很多朋友也有和我一样的需求，从左端开始，把一个View从0到1展开，代码如下：

        ObjectAnimator animator1 = ObjectAnimator.ofFloat(mDownloadingProgressViewUpper, "pivotX", 0.0f, 0.0f);

        ObjectAnimator animator2 = ObjectAnimator.ofFloat(mDownloadingProgressViewUpper, "scaleX", 0.0f, 1.0f);

        AnimatorSet set = new AnimatorSet();

        set.play(animator1).with(animator2);

        set.setDuration(1000);

        set.start();