View坐标详解（2）

View中scrollTo() scrollBy() getScrollX() getScrollY()

// scrollTo与scrollBy滑动的都是view的内容
public void scrollTo(int x, int y) {
     if (mScrollX != x || mScrollY != y) {
          int oldX = mScrollX;
          int oldY = mScrollY;
          mScrollX = x;
          mScrollY = y;
          invalidateParentCaches();
          onScrollChanged(mScrollX, mScrollY, oldX, oldY);
          if (!awakenScrollBars()) {
              postInvalidateOnAnimation();
          }
      }
}

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

// getScrollX()与getScrollY()获取的是相对于父容器的偏移量
public final int getScrollX() {
        return mScrollX;
}    
public final int getScrollY() {
        return mScrollY;
}

// 改变View在屏幕上的位置
public void offsetLeftAndRight(int offset)
public void offsetTopAndBottom(int offset)