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
在python中,可以通过id()这个方法来获取对象的内存地址. 但是反过来,怎么获取内存地址上存储的值? 先看一段代码: from ctypes import string_at from sys import getsizeof from binascii import hexlify a = 2333 print(hexlify(string_at(id(a),getsizeof(a)))) 方法详解: getsizeof(object,default)-->int :返回对象的大小, s
一般自定义view需要重写的方法 void onMeasure(int widthMeasureSpec, int heightMeasureSpec) void onSizeChanged(int w, int h, int oldw, int oldh) void onDraw(Canvas canvas) 复制代码 一般自定义ViewGroup需要重新的方法 void onMeasure(int widthMeasureSpec, int heightMeasureSpec) void o
var ent = new Ent(); foreach (var item in ent.GetType().GetProperties()) { var v = (DescriptionAttribute[])item.GetCustomAttributes(typeof(DescriptionAttribute), false); ].Description; item.SetValue(ent,descriptionName+":1"); } private class Enu
有时候我们用数字来区分一些类型,如1:中国银行,2:建设银行,3:工商银行,…….这时候我在代码中通常会定义枚举来与定义的一一对应,并在该枚举值上设置特性来表示所代表的含义,这样避免多处写一些数字来标识所代表的类型.而且后续添加修改也很方便. 首先,自定义一个特性描述类: public class DescriptionAttribute : Attribute { public static readonly DescriptionAttribute Default; public Descr
https://www.luogu.org/problem/P2966 题目描述 Like everyone else, FJ is always thinking up ways to increase his revenue. To this end, he has set up a series of tolls that the cows will pay when they traverse the cowpaths throughout the farm. The cows move
