android中View的scrollBy(int x,int y)和scrollTo(int x,int y)的区别

先看看Google的官方文档的解释

public void scrollBy (int x, int y)

Added in  API level 1

Move the scrolled position of your view. This will cause a call to onScrollChanged(int, int, int, int) and the view will be invalidated.

Parameters

x	the amount of pixels to scroll by horizontally
y	the amount of pixels to scroll by vertically

public void scrollTo (int x, int y)

Added in  API level 1

Set the scrolled position of your view. This will cause a call to onScrollChanged(int, int, int, int) and the view will be invalidated.

Parameters

x	the x position to scroll to
y	the y position to scroll to

解释：

scrollBy(int x,int y)意思就是将view移动x和y那么远的距离；而scrollTo(int x, int y)意思就是将view移动到（x,y）坐标的位置上去。以下是scrollBy(int x,int y)的源码

  public void scrollBy(int x, int y) {
        scrollTo(mScrollX + x, mScrollY + y);
    }

意思就显而易见了。