Programmer Think

Original text: Xu GongphenomenonHello, everyone. Today we bring you a murder case of RxJava, which is caused by a line of code return null.A while ago, colleagues in the group reported that RxJava crash ed in the debug package, and the exception information captured was incomplete. (that is, the stack we captured does not contain our own code, ...

Handler is a technology that must be used in Android development. It is also very simple to use. Rewrite handler's handleMessage method in the main thread and send messages through handler's sendMessage() method in the sub thread. The Handler mechanism can be well understood through this figure. There are several roles: ActivityThread, Handler ...

With CameraX for video recording, the steps to initialize the camera are much the same as when taking pictures, except that the video capturer VideoCapture is added. There are three main areas of code that need to be modified, described below. The first place is in AndroidManifest. The XML is supplemented with the declaration of recording right ...

In this article, let's take a look at LiveData in Android architecture components. Compared with ViewModel, LiveData has life cycle awareness, that is, it combines ViewModel with lifecycle. When the data of the application is updated, we generally only want to update the UI when the application is visible to the user; Further, if the applicatio ...

The implementation of Lifecycle is similar to ViewModel, which uses fragment to realize its functions. By adding a fragment to the activity, the fragment can receive various life cycle callbacks. The following source code uses version 2.2.0 Introduction to using method I'm not going to talk too much about the usage of lifecycle here. Un ...

Material You It is not only the development direction of the next generation of Material Design, but also a new design vision: it is convenient for you to create personalized style design, meet various needs and adapt to various screens; Jetpack Compose It is a new modern toolkit for building a native Android interface, which can help you bui ...

Python wechat ordering applet course video https://edu.csdn.net/course/detail/36074 Python actual combat quantitative transaction financial management system https://edu.csdn.net/course/detail/35475 Catalogue* 1 FBO and RBO in webgl + 1.1 FramebufferObject + 1.2 true carrier of color accessories and depth template accessories + 1.3 collectio ...

introduction Unix series processes are subprocesses obtained by copying init process or kernel process. The specific details of different implementations are different. Linux provides three kinds of fork, vfork and clone system calls. 1, Unix process overview In Unix, the CPU allocates and schedules resources with the process as the allo ...

1.Material design definition Material design is a new set of interface design language developed by google design engineers based on excellent design principles and combined with rich creativity and science and technology, including visual, sports, interactive special effects and other characteristics. 2. Use of toolbar Toolbar not only inhe ...

1, Create tasks in multiple ways 1. Create task with task name Example: // Create task with task name def Task taskCreatedByName = task taskCreatedByName // def Task taskCreatedByName = task(taskCreatedByName) taskCreatedByName.doLast { println "This is a task created by task name" } Prototype: Task task(String name) throws InvalidU ...