include "stdafx.h" #include<iostream> #include<vector> #include<string> #include<math.h> #include<iomanip> using namespace std; int main() { float L, R; while (cin>>L>>R) { float len = 2 * 3.1415926*R; i
获取view在屏幕上的绝对坐标在调试时候非常有用. 看如下代码 public class AbsolutePosActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(new DrawLineView(this)); } } public class DrawLineView
final int[] location = new int[2]; view.getLocationOnScreen(location); final int[] location = new int[2]; view.getLocationOnScreen(location); 这样就可以得到该视图在全局坐标系中的x,y值,(注意这个值是要从屏幕顶端算起,也就是索包括了通知栏的高度)//获取在当前屏幕内的绝对坐标 location[0] x坐标 location[1] y坐标 locatio
2015-07-28 17:29:19 这一篇主要看看布局过程 一.布局过程肯定要不可避免的涉及到layout()和onLayout()方法,这两个方法都是定义在View.java中,源码如下: /** * Assign a size and position to a view and all of its * descendants * * <p>This is the second phase of the layout mechanism. * (The first is measur