[学习总结]1、View的scrollTo 和 scrollBy 方法使用说明和区别

时间：2014-05-09 15:44:10 阅读：277 评论：0 收藏：0 [点我收藏+]

参考资料：http://blog.csdn.net/vipzjyno1/article/details/24577023 非常感谢这个兄弟！

先查看这2个方法的源码：

scrollTo：

 1  /**
 2      * Set the scrolled position of your view. This will cause a call to
 3      * {@link #onScrollChanged(int, int, int, int)} and the view will be
 4      * invalidated.
 5      * @param x the x position to scroll to
 6      * @param y the y position to scroll to
 7      */
 8     public void scrollTo(int x, int y) {
 9         if (mScrollX != x || mScrollY != y) {
10             int oldX = mScrollX;
11             int oldY = mScrollY;
12             mScrollX = x;
13             mScrollY = y;
14             invalidateParentCaches();
15             onScrollChanged(mScrollX, mScrollY, oldX, oldY);
16             if (!awakenScrollBars()) {
17                 postInvalidateOnAnimation();
18             }
19         }
20     }

scrollBy：

 1 /**
 2      * Move the scrolled position of your view. This will cause a call to
 3      * {@link #onScrollChanged(int, int, int, int)} and the view will be
 4      * invalidated.
 5      * @param x the amount of pixels to scroll by horizontally
 6      * @param y the amount of pixels to scroll by vertically
 7      */
 8     public void scrollBy(int x, int y) {
 9         scrollTo(mScrollX + x, mScrollY + y);
10     }