Programmer Think

EventBus official website usage method Step 1: define events Subscribed event class public static class MessageEvent { /* Additional fields if needed */ } Step 2: prepare subscribers The @ Subscribe annotation declaration is required for the subscription method. You can set the thread to handle the event, etc @Subscribe(threadMode = Th ...

preface In the previous article, we mainly explained the knowledge points corresponding to Kotlin string, number type and standard library function. In this article, we will explain the knowledge points related to Kotlin set. 1. List set 1.1 read only set val list = listOf("json", "jack", "jacky") fun main{ //Read only list; Cannot writ ...

Basic configuration and file path description of Camera driver The driver configuration path is: \ device\sprd\platform\board\camera\sensor_config.xmlThe path of the driver code is: \ vendor \ SPRD \ modules \ libcamera \ sensor \ sensor_ Under DRV \ classic, there are drivers from various sensor manufacturers, such as Galaxy core, Superpix, S ...

1. General   in the previous chapter Source code details the init process of Android 9.0 § system startup process (phase I) and Source code details the init process of Android 9.0 system startup process (phase II) Explained that after the first two phases of init, the attribute system and SELinux system have been established, but ...

Android animation can act on View/ViewGroup, activity and Fragment to achieve cool interaction effects. After several days of exploration, we have made clear the use of all kinds of animation and the implementation principle of animation, which is recorded below.Although there are several categories of Android animation, the implementation core ...

prefaceAndroid event distribution mechanism is the foundation that Android developers must understandThere are a large number of articles on Android event distribution mechanism on the Internet, but there are some problems: incomplete content, unclear ideas, no source code analysis, complex simple problems and so onToday, I will comprehensively ...

usage method The use method is very simple, according to Official documents The introduction is divided into three steps. Step 1: define events public static class MessageEvent { } Step 2: prepare subscribers Define subscription methods to handle received events. @Subscribe(threadMode = ThreadMode.MAIN) public void onMessageEvent(Messa ...

RecyclerView actual useMake a list with RecyclerView. Display test data.This example is divided into the following steps:Determine the data. Analog data is used here.Design UI and presentation.Write layout and adapter.Analog dataA skillful woman can't make bricks without rice. Simulation data is simulation demand.Create a new DataTest class and ...

Android gets results from other activities: registerForActivityResult()brief introductionActivity Result APIs can replace the startActivityForResult method to start an activity to obtain resultsActivity Result APIs can replace the requestPermissions method to request runtime permissionsbackgroundStarting an activity (whether in this application ...

1, Role of JNI: 1. Make JAVA interact with other local languages (C, C + +); 2. Call C, C + + and other language codes in JAVA code or C, C + + call JAVA code. Because JAVA has the characteristics of cross platform, the interaction ability between JAVA and local code is weak. Using JNI feature can enhance the interaction ability between JAVA ...