Introduction to Android: Broadcast Sender and Broadcast Receiver

Reference resources: Introduction to Android: Broadcast Sender and Broadcast Receiver - xiazdong - CSDN Bloghttp://blog.csdn.net/xiazdong/article/details/7768807   I. Broadcast Sender-Broadcast Receiver Introduction     1. Broadcast Receiver   Broadcast recipients simply refer to the Java class that receives broadcast intentions. This Java clas ...

Posted on Sun, 26 May 2019 15:07:38 -0700 by scottreid1974

Use of iOS WK WebView and Problems encountered

Introduction to WK WebView UIWebView has existed since iOS 2 and WK WebView from iOS 8. There is no doubt that WK WebView will gradually replace the heavy UIWebView. Simple tests show that UIWebView takes up too much memory, and the peak memory is exaggerated. WKWebView pages are also loading faster, but not as much as memory. Here are some oth ...

Posted on Sun, 26 May 2019 14:54:19 -0700 by 25lez25

Redux Advanced Series 3: How to Design action, reducer, selector

Redux Advanced Series: 1. React+Redux project structure best practices2. How to Design State Reasonably In the previous two articles, we introduced the organization of the Redux project structure and how to design State. In this article, we will continue to introduce how to design action, reducer, selector based on the previous two articles. St ...

Posted on Sun, 26 May 2019 14:45:54 -0700 by steviemac

profile analysis of python program

Operating system: CentOS 7.3.1611_x64 python version: 2.7.5 Problem description 1. Python developed program is very slow in the use process, want to determine which section of code is slower; 2. Python programs occupy a lot of memory in the process of using, and want to determine which code caused it. Solution Using profile an ...

Posted on Sun, 26 May 2019 14:44:27 -0700 by TouranMan

Sprboot/cloud (12) Advancement of Unified Anomaly Processing

Sprboot/cloud (12) Advancement of Unified Anomaly Processing Preface stay Sprboot / cloud (2) Specification response format and unified exception handlingThis blog has mentioned the use of @ExceptionHandler to handle various types of exceptions. This approach is also widely used on the Internet. Today, this blog will introduce a unified way to ...

Posted on Sun, 26 May 2019 14:35:14 -0700 by POG1

Kotlin - Package, Class, Interface and Object Basic Grammar of Program Core Components (1)

Introduction First two chapters Kotlin - Basic Grammar of Variables, Attributes and Functions of the Soul Composition of Programs (I) and Kotlin - Basic Grammar of Variables, Attributes and Functions of the Soul Composition of Programs (2) This chapter summarizes the basic structure elements and organization form of Kotlin's algorithm from th ...

Posted on Sun, 26 May 2019 14:25:41 -0700 by gurechan

Short Practice - Database Basis (I)

** 1. Syntax for creating tables: ** CREATE TABLE STUDENT( SID NUMBER NOT NULL PRIMARY KEY, STUNAME VARCHAR(30) NOT NULL, STUAGE NUMBER , ADDRESS VARCHAR(100), TEL NUMBER ); 2. Insert information INSERT INTO STUDENT(SID,STUNAME,STUAGE,ADDRESS,TEL)VALUES(1,'Zhang San',20,'Tianjin Airport',17602684398) 3. Insert sp ...

Posted on Sun, 26 May 2019 14:14:35 -0700 by nagrgk

An Example of SQL Statistics-mysql Implementation

1 /*Table structure for table `stuscore` */ 2 3 DROP TABLE IF EXISTS `stuscore`; 4 5 CREATE TABLE `stuscore` ( 6 `id` int(11) NOT NULL AUTO_INCREMENT, 7 `name` varchar(20) DEFAULT NULL, 8 `subject` varchar(20) DEFAULT NULL, 9 `score` varchar(20) DEFAULT NULL, 10 `stuid` varchar(10) DEFAULT NULL, 11 PRIMARY KEY (`id`) 12 ...

Posted on Sun, 26 May 2019 14:02:09 -0700 by p2grace

iOS Deeply Understanding GCD Part 1 (Deeper Understanding of Parallel, Serial, Asynchronous and Synchronization)

Deeper Understanding of Parallel, Serial, Asynchronous and Synchronization Single understanding: Parallel: It means that the tasks in the queue (block s) are not executed one by one, but are executed at the same time, and there is no sequence. Serial: Tasks in the queue are executed one after another, and the first is executed before the second ...

Posted on Sun, 26 May 2019 13:53:59 -0700 by pplexr

Using Bessel Curve to Realize Animation

Bezier curve, also known as Bezier curve or Bezier curve, is a mathematical curve applied to two-dimensional graphics applications. You can think of him as all kinds of curves we know mathematically. Using Bessel curve to realize animation is to use Bessel curve as the trajectory of animation. Path class is indispensable to the realizati ...

Posted on Sun, 26 May 2019 12:55:28 -0700 by martins