洛漠O_o的专栏

MeasureSpec测量规格/** * A MeasureSpec encapsulates the layout requirements passed from parent to child. * MeasureSpec是父控件传给子控件的布局条件 * Each MeasureSpec represents a requirement for either the width or t

1.View的工作流程measure 测量View的宽高；measure完成之后，通过getMeasuredWidth(),getMeasuredHeight()可以获取控件的宽高，大部分View宽高就是测量的宽高 layout 确定View在父容器中放置的位置，四个顶点坐标及View实际宽高 完成后可通过getTop(),getBottom(),getLeft(),getRight()获取