Programmer Think

First of all, I read a lot of articles on the Internet, including Guo Linda's articles. They all analyzed the event distribution of ViewGroup and View perfectly. But still confused: how did the Touch Event ViewGroup capture it? The gods all said that Activity,Window,ViewRoot and so on were all involved in the event distribution. How did they p ...

IO Character stream Character streams are IO streams that can read and write characters directly When character stream reads characters, it reads byte data first and then converts them to characters. If character is written, it needs to be converted to bytes before writing out. FileReader The read () method of the FileReader class can be r ...

Previous analysis has said that Windows Manager Service is only responsible for Window management, not for View drawing and layer mixing. This article will analyze how WMS manages windows in the end. When I first came into contact with Android, I felt that Activity seemed to be the encapsulated Window of Google. As long as APP started the new a ...

discuss Android Before the event delivery mechanism, it is important to identify the two basic control types of android: View and ViewGroup. View is a common control, no sub-layout, such as Button, TextView. ViewGroup inherits from View; ViewGroup control, with child controls, such as Linearlayout, Listview, etc. There are three most ...

Through the sweep of Wechat to download, there will be a white screen situation, perhaps because of security considerations or other reasons, it is no longer possible to download the apk through the sweep of Wechat. According to the ideas provided by netizens, this paper sorted out three schemes. 1. Developers applying for Tencent Open Platfor ...

1. definition Separating the construction of a complex object from its representation enables the same construction process to create different representations. 2. introduction The builder model belongs to the creation model. Builder mode is mainly used to create complex objects, users can not care about its construction proce ...

Introduction to GMSSL Project Home Page: http://gmssl.org/ github: https://github.com/guanzhi/GmSSL GMSSL windows + vs2010 compilation Compile and install: http://gmssl.org/docs/install.html Windows is compiled as follows: Compilation error 1. base58.c error C2057: Constant expression should be entered The following errors were mad ...

Recently, I met a problem in my work. I need to judge the running state of the program through the program interface. At first, I thought it was very simple. It was not just a form control to get Button's status and Text. It happened that I did it last year. As the project delivery time approached, I was ready to start solving the problem. Sudd ...

brief introduction See such a question on the SF: For example, for compelling reasons, several global functions need to be written. But I don't want to do that. window.a = function(){} window.b = function(){} window.c = function(){} What's a good way to write this question? Answer: If you use jQuery, you can write as follows $.ex ...

First of all, I support it. iOS The original method is implemented. However, the original method of scanning two-dimensional codes does not support the devices before IOS 7.0, so the original method of generating two-dimensional codes is implemented, while the scanning two-dimensional codes are implemented by zBar sdk (of course, the official z ...