Programming VIP

Author: shrimp Mi Jun 1. Improper use of handler? First find out what is improper use of} Handler? Generally, it has the following characteristics: Handler adopts anonymous internal class or internal class extension, and holds the reference of external class {Activity} by default: // Anonymous Inner Class override fun onCreate(savedInst ...

1.log4j fire By the end of 2021, log4j was completely popular. Log4j, as one of the most important components in the whole java ecosystem, was exposed to high-risk vulnerabilities. Because of the vulnerabilities of log4j, countless small partners immediately spent all night fixing bug s. Today, let's not talk about the vulnerability of log4j, ...

Come on, little brother, what's the matter with HandlerThere are too many blogs related to Handler, and there are a large number of random searches, but they basically post the source code and pose when they come up. It's not easy to understand the overall relationship and process in a short timeInterviewer, sit down and listen to my story?This ...

Handler is an asynchronous callback mechanism provided in Android, which can also be understood as a message mechanism between threads. In order to avoid ANR, we usually put some time-consuming operations (such as network request, I/O operation, complex calculation, etc.) into the sub thread for execution. When the sub thread needs to modify th ...