Programmer Group

Preface The company is developing a mall project, because of the project needs, it has made an address selector which imitates a lot of spelling, but there is some discrepancy with the implementation method of spelling many, the general effect is similar.Say nothing but the last action map: <figcaption></figcaption& ...

Standard Response and Content-Length Header Since HTTP 1.1, in order to process multiple HTTP requests and responses in a link, the server must return the appropriate Content-Length value along with the response. By default, you do not need to return the Content-Length header for simple requests, such as: def index = Action { Ok("Hello ...

Design sketch: 1. UI Interface Design Using Relative Layout layout, mainly about the design of the middle input account and password. Two Linear Layouts are used to adjust the position by adding controls to them. The gray line is implemented through the control View. The image of the delete button is hidden fir ...

Today, Deploy static resource packages come into our Production environment. Only static resource files, such as database connection information, SQL query statements, are involved in the package. After successful deployment, the following error occurred when starting the service: Exception in thread "main" java.lang.UnsupportedClassVersionErro ...

I. What are reptiles? Web crawlers (also known as web pages) spider It is a kind of automatic grabbing according to certain rules. Web A program or script for information. If the Internet is compared to a large spider web, each node in the spider web has a lot of data. A crawler is like a small spider who finds the website thr ...

Preface A few days ago, I was asked about the difference between getMeasuredWidth and getWidth, so I went back to the source code and reviewed the process of measure/layout/draw. Interested students can read the previous articles. View Drawing System Knowledge Carding (3) - Detailed Measure of Drawing Process View Rendering System Knowledge Ca ...

1. How SAX parses XML documents: Unlike DOM parsing, DOM parsing is to allocate a tree structure in memory according to the hierarchical structure of XML, encapsulating the labels, attributes and text of XML as objects. The advantage is that it is very convenient to add, delete and modify. The disadvantage is that if the file is too large, it ...

I. Preface There are many on-line implementation of this demand, but too many fancy functions are not used, and their own project needs are not suitable for use, but it is too difficult to change the source code, they wrote a. Two. Steps Rewrite either recyclerview or item. I choose to rewrite item here. 2.1 Implementing item l ...

Write at the beginning Today is a holiday, it should be said that this year's summary should be written. But looking back, I haven't written technical texts for a long time. About File Caching Write a lot of code, often in writing EXE (timing tasks) or writing small sites (between the use of data and client calls) need to use caching, data i ...

introduce RecyclerView is similar to ListView in principle: it maintains only a small number of Views and can display a large number of data sets. RecyclerView simplifies data presentation and processing in two ways: Use Layout Manager to determine how each item ...