NumberPicker.java 文件源码

private void scaleRect(Rect rect, float scale) {
    if (scale != 1.0f) {
        rect.left = (int) (rect.left * scale + 0.5f);
        rect.top = (int) (rect.top * scale + 0.5f);
        rect.right = (int) (rect.right * scale + 0.5f);
        rect.bottom = (int) (rect.bottom * scale + 0.5f);
    }
}