android 如何相对某个控件居中对齐

1. 设置偏移

        animalView.setTranslationY(offset);

2. 设置相对顶部居中

        RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
        layoutParams.addRule(RelativeLayout.ALIGN_TOP,view.getId());
        animalView.setLayoutParams(layoutParams);

重点：两个view居中对齐的思路

offset = (bigViewHeight - smallViewHeight)/2;
两个view顶部对齐然后，通过这是偏移将中心线对齐