Programmer Group

This film is a detailed analysis of Drawer Layout and a summary of the problems encountered in development. DrawerLayout is a control supporting side-slip effect in SupportLibrary. In the development, it mainly cooperates with Navigation View + Toolbar to realize side-slip menu and see the effect concretely. This effect template can be ...

When you see the above effect, you will think of letting the artist cut a round corner picture with imageview, which is also a way to achieve, it is more convenient to achieve, and do not need to do any compatible adaptation; in fact, android system provides CardView control, which is also very convenient to achieve, but also can achieve som ...

Recently, I tried to make a PC and simply recorded the key parts. The System.IO.Ports class is mainly used in c# serial communication, but it is very convenient in fact. The final results are as follows: Don't forget the following Fill in the configuration of serial port We can get the list of ports on this machine by GetPortNames method. Note ...

Ultimately, context managers may be almost as important as subroutine s themselves. At present, we only know the fur of the context manager... Basic has with statements, and many languages have them. However, with sentences play different roles in different languages and do simple things. Although it can avoid using dots to find attributes cons ...

0x00 Packaging Prerequisites This time, it is only encapsulated in the function interface layer, which was originally intended to be encapsulated in business class calls. There are still many knowledge points to review, so it is abandoned. Now let's talk about the guidelines for encapsulating interfaces: 1. Interface single responsibility ...

In the last issue, we learned about the use of ViewAnimator and ViewSwitcher components. Have you mastered them? In this installment, we will learn about the two sub-components of ViewSwitcher, ImageSwitcher and TextSwitcher.     ImageSwitcher   ImageSwitcher and ImageSwitcher inherit ViewSwitcher, so they have the same characteristics ...

python provides powerful built-in functions, so let's take a look at what these functions do. Absolute value of abs(). print(abs(-1)) print(abs(0)) Operation result 1 0 abs all() passes on an iteratable object, each worth bool value of which returns Ture for Ture, one for False, and the result for False. print(all(i for i in range(10)))# ...

I. directory 1. Introduction to Python The founder of python, Guido van Rossum, is now a particularly frequent development language. Main application areas: Cloud Computing: The hottest language in cloud computing. Typical applications are OpenStack. WEB Development: Many excellent WEB frameworks, many large websites are Python development, su ...

In this paper, Huffman coding is used to compress and decompress files (text files). Firstly, the overall idea of the project is introduced: Huffman coding compression file is actually to count the frequency of each character in the file, then generate the corresponding encoding for each character, and then save each character in the compresse ...

Introduction to this section: This section brings you ProgressBar (progress bar) and SeekBar (drag bar) in Android basic UI control. There are many application scenarios of ProgressBar, such as when users log in, when the background is making requests and waiting for the server to return information, the progress bar will be used at this time; ...