Why is the kotlin language not popular now? What's your opinion?

I see a problem in Zhihu , After looking at the detailed description of the problem, I should ask whether it is popular in the field of Android development , On this point can only Kotlin stay Android The field will only become more and more popular , Not to mention other big factories Android One will be added to the recruitment requirements “ Be familiar with Kotlin” or “ be familiar with Kotlin Language is preferred

2017 year Google announce Kotlin Become Android After the official language , about Android For developers ,Kotlin It is a necessary programming language

Kotlin Why is it worth learning

1. Extremely high production efficiency Kotlin

Kotlin It has concise grammar and modern grammatical characteristics , So that users can spend less time , To a higher standard , To get more done . let me put it another way , That is to say, with Java Just the opposite ： The early development efficiency is higher , There are fewer online problems in the medium term , Later code is easier to maintain .

2. Strong compatibility

Kotlin It can be done with Java Mixed programming , This is especially important , Otherwise ,Kotlin The attraction of will be greatly reduced . Because in our actual work , In most cases, new functions are developed on the basis of old projects , Push down the whole module or even the program and use Kotlin rewrite , In fact, it is very unrealistic .

Kotlin Strong compatibility , Let's reuse the former Java Code , It also allows us to move from Java Migrate to Kotlin, Don't worry about rewriting a lot of code at once , Thus new problems arise .

3. Embrace the future ,Kotlin The development prospect of is very broad

Now, except for big factories , Many small and medium-sized companies are recruiting Android Developers are required to be familiar with Kotlin, Many people go to study Kotlin, However, many people are having Java Knowledge base and use experience , Learn again Kotlin.

Of course Java Experience learning Kotlin, This is both a kind of help , It is also an obstacle . stay Kotlin Early stage of learning ,Java Experience can help us master its grammar quickly , But later , In our minds Java The stereotype will limit our further improvement .

This is also what many people are learning kotlin Some problems often appear in , Mainly learning kotlin Time is short A relatively systematic learning route , Most of them learn from some scattered blogs , There is no effective way to connect all the knowledge points .

Trying to figure this out , Then we must master Kotlin The core knowledge of , understand Kotlin Programming ideas , Many people are caught off guard at work , The reason for this is that most people only know kotlin Surface , I don't understand Kotlin Application scenarios and Kotlin The underlying implementation principle .

《Kotlin A complete set of notes from introduction to principle to actual combat 》 It has been sorted out , If you need a full version , You can click the portal directly to ！

The first module the first module ：kotlin Basic introduction

• The base type
• Operators and Expressions
• Flow control statement ( The order , Branch , loop )
• Arrays and collections
• Functions and lambda expression
• object-oriented

Second module ：Kotlin Advanced and collaborative

• abnormal
• Generic
• annotation
• Kotlin and Java Call each other
• Kotlin Of DSL And customization DSL
• Kotlin Application and practice of collaborative process

Third module ：Kotlin Analysis of source code of synergetic principle

• Collections Source code
• Xiecheng source code map
• Suspend function
• launch
• Dispatchers How it works
• CoroutineScope
• Channel
• Flow

Through research Kotlin Source code , Deepen the relationship Kotlin understand , meanwhile , You can also explore its underlying principles . such as ,Kotlin How the hang function of a coroutine hangs ？Kotlin How does the collaboration process connect with the thread ？

The fourth module ：Kotlin Project actual combat case （ This module mainly analyzes the video and supporting source code ）

Most of the actual combat cases are video teaching , This set is specially shared here Kotlin From introduction to principle to actual combat video and supporting documents If you need to learn systematically Kotlin Little buddy