Programmer Think

Achieve goals We can find that in the live broadcast system, the rotation chart is a very important part of the system page. Today, let's take a look at how the rotation effect of the live broadcast system is realized. You can manually scroll left and rightCan rotate automaticallyStrong customization Realization idea The first though ...

Use notification First, a NotificationManager is needed to manage notifications, which can be obtained by calling the getsystem service () method of Context. The getSystemService() method receives a string parameter to determine which service to obtain from the system. Here we pass in Context NOTIFICATION_ Service is enough. Run the progr ...

I Hilt introduction Hilt is the product of secondary packaging of Android official on the basis of relying on Dagger. Students who have studied Dagger will find that as a dependency injection framework, Dagger has powerful functions, but the high learning threshold makes the landing cost of Dagger on Android very high. In order to solve the ab ...

In app development, we need to use app resources, such as text, pictures, Activity, Service or broadcastReceiver. getApplicationContext() is often used to get a Context object. So what exactly is this Context?Introduction to Context classContext means context, context, background, environment, etc. Context is a core function class to maintain t ...

Experiment 12 SQL + content Provider experiment 1, Experimental purpose Be familiar with the use of Content Provider; 2, Experimental content 1. Implement the calling of ContentProvider and ContentResolver through URI; 2. Realize the functions of ContentProvider on database SQLite: add, delete, modify and query; 3. The table structure of th ...

This article is based on the ideas required by the project to learn from the improved ideas of other bloggers. The ideas will be the same, but this article does belong to my original creation, and the reference link will be displayed at the end of the article (ah, good official...) Let's talk about the functional requirements of the project, ...

RxJava operator application Import and stock in: api("io.reactivex.rxjava3:rxjava:3.1.0") api('io.reactivex.rxjava3:rxandroid:3.1.0') Operator classification Create Operator Complex data traversal just fromArray fromIterable range Timed task interval intervalRange Nested callback asynchronous events create ...

objective Simple call and less repetitive code Independent of third-party libraries (only including Retrofit+Okhttp + collaboration) You can start immediately even if you don't understand the collaborative process at all (template code) What does it mean to write Kotlin code in Kotlin's way? Compare the following two codes: mViewModel.wx ...

Type Type is widely used in reflection and is mainly used to obtain types. For example: whether it is a generic type, whether it is a variable type, and so on. Get more information through its subclasses. It has five subclasses: Class, GenericArrayType, ParameterizedType, TypeVariable and WildcardType. Among them, only Class is an entit ...

Chapter 7 in depth understanding of ContentProvider 7.1 general This chapter focuses on the implementation of ContentProvider, SQLite, Cursor query and close functions and the ContentResolver openAssetFileDescriptor function. In order to help readers further understand the knowledge points of this chapter, the author specially selects ...