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Preface The official Android description of Canvas is that the Canvas class holds all Draw-related methods. To get to Draw, you need four elements: 1 Bitmap for carrying pixel information, 2 Canvas for managing Draw related methods, 3 drawing primitives (e.g., Rect, Path, text, Bitmap), and 4 a brush (for describing the color and style of an ...

brief introduction WebSocket is a new communication protocol of HTML5. It realizes two-way communication between browser and server. Socket.IO is an open source framework, which is completely implemented by JavaScript, based on Node.js and supports WebSocket protocols for real-time communication and cross-platform. This article will be based ...

Notes on the Use of input Tags in Android Recently encountered a demand, html page has a <input type="file"/> tag to call the client's photo taking and photo selection function, in iOS can be normally set up to take photos, select photos. But there's no response on Android, and that's what I expected. Of course, I'll find ...

Paint, the "pen" used to draw graphics We know some basic uses of Paint before: paint.setAntiAlias(true);//anti-aliasing paint.setColor(Color.RED); //setpc paint.setStyle(Style.FILL);//Setting Fill Style paint.setStrokeWidth(10);//Set Brush Width, Unit px paint.setShadowLayer(10, 15, 15, Color.GREEN);//Setting Shadows However, ...

Continue with the card design from the previous blog, and we'll continue from WeChat To find some clues, let's start by looking at an interface that is the default public number in WeChat, mainly to publish the latest developments on Tencent News. As we can see, it uses a card layout similar to the one we used in the previous article.So, let' ...

WeChat has already started mars, but there are few related articles on the market, even if there are many such as using xlog, so this time I hope to be able to analyze from stn, which is directly used for the bottom communication of im.To be more comprehensive, let's start with samples.First of all, WeChat explicitly replaced JSON and xml with ...

MVP mode Android MVP Pattern Android MVP mode1 It's nothing new, and I've used this design pattern extensively in my own projects. When the project is more and more large and complex, and more and more R&D personnel are involved, the advantages of MVP model are fully demonstrated. Guide: MVP mode is a variant of MVC mode on An ...

First, show the results of the project operation: The initial login interface: (1) Choose to remember the password: Click login to jump to Activity 02 page: (2) When logged in again: Cancel remembering passwords: Click login and jump to Activity 02 page. When you open the project again, it will return to the state of empty initial ac ...

After several days of tossing and turning, this App has basically been completed. Part of it is a custom SwitchBar. I have seen many other people's solutions online. They are all based on the system's own SwitchBar. They just modify some background image resources or something. The effect is not very ideal. The following is my solution. First p ...

AoP Before reading, let's take a look at some questions about burial sites and see if this article is useful for you. The entry and exit of each page need buried statistics. Many button clicks require statistical reporting. The performance data of some functions need statistics. Well, if you encounter these problems, then tell you that AOP ...