简单的小问题
Canvas canvas = sfh.lockCanvas(new Rect(oldX, 0, oldX + length,getWindowManager().getDefaultDisplay().getHeight()));// 关键:获取画布
Log.i("Canvas:",
String.valueOf(oldX) + "," + String.valueOf(oldX + length));
这两行代码什么意思啊?rect里面的四个参数是什么意思啊,
--------------------编程问答-------------------- Rect(int left, int top, int right, int bottom)
Create a new rectangle with the specified coordinates. --------------------编程问答-------------------- 那这四个坐标是根据什么呢?哪里算是原点啊? --------------------编程问答-------------------- 呵呵,学习一下,貌似跟java中的差不多! --------------------编程问答--------------------
Canvas canvas = sfh.lockCanvas(new Rect(oldX, 0, oldX + length,
getWindowManager().getDefaultDisplay().getHeight()));// 关键:获取画布
x,y起点坐标 (oldX, 0)
oldX + length
getWindowManager().getDefaultDisplay().getHeight() 其实是 0 + height
--------------------编程问答-------------------- 哦,谢了
补充:移动开发 , Android