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Analysis of the latest Android high frequency interview questions in 2020 (BAT TMD JD Xiaomi)

2022-04-23 13:10:00 【InfoQ】

Chapter four  Kotlin  relevant

The fifth chapter   Network related

Chapter six   pluggable & Hot repair & modularization & Componentization & Incremental updating &Gradle

Chapter vii.   Picture related

Chapter viii.  Flutter  relevant

[](() Chapter one  Android  relevant



Android  Advanced interviews often have a lot of principle analysis 、 The main reason is that large companies should write frameworks according to the actual situation of the company . But basically no one can write a framework from zero like a genius , Many people start writing frameworks by imitating . And you have to imitate , Then you must first understand the framework source code . So reading the source code is so important . That's why Alibaba Tencent Android The interview will pay so much attention to the analysis of source code principles .

Our first chapter also focuses on Android Interviews are common Framework、binder、EventBus、 Threads and thread pools 、SharedPreferences And many other knowledge points for principle analysis . Help you deeply understand the principle of source code .

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[](() Chapter two   performance optimization



Why is performance optimization so important ？  Just do Android  Application developers know ,APP Performance optimization is a problem that affects product quality and user retention in the development process . Therefore, almost all Internet enterprises will pay attention to the investigation of developers' performance optimization skills ！

This chapter draws （UI）、 Memory 、 Storage 、 stability 、 Optimize power consumption and installation package , The principle of drawing and memory is deeply analyzed from the system , Step by step to gain insight into the underlying causes of performance problems , At the same time, it describes the use of a variety of performance optimization tools , By analyzing typical cases , Get an effective optimization scheme , So as to achieve higher quality applications .

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[](() The third chapter  Java  relevant



Java yes Android Foundation of development , At the same time, it is also the first threshold for large factory interview . Generic 、 Multithreading 、 Reflection 、JVM、Java IO 、 annotation 、 Serialization and so on are not about whether to use them or not , Mainly to check whether your basic skills are solid , Also examining the depth of your skills .

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[](() Chapter four  Kotlin  relevant

《Android Summary of learning notes + Latest mobile architecture video + Big Android interview questions + Project actual combat source code handout 》 Free open source   Hui Xin search official account 【 Advanced programming 】
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Kotlin  be applied to  Android  Development compared to traditional  Java advantage , Depends on  Kotlin  A lot of grammar sugar and more concise and easy to express grammar style can greatly improve the development efficiency , Reduce the amount of code , Reduce maintenance costs . So meituan 、 Ali 、 Tencent and other technical teams are already using kotlin, So it will kotlin Developed by you , Certainly more popular with the interviewer ！

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[](() The fifth chapter   Network related



About computer networks ,HTTP Network communication protocol is very important in any development work ！Android Development interviews are often asked about computer network knowledge , It mainly investigates whether we have systematically studied the operating system and computer composition principle , Because only after we read the operating system can we systematically understand the principle of computer .

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[](() Chapter six   pluggable & Hot repair & modularization & Componentization & Incremental updating &Gradle



Plug in technology can be said to be Android One of the skills a senior engineer must possess , from 2012 The concept of plug-in was put forward （Android edition ）, To 2016 In the past few years, plug-ins have become more and more popular , so to speak , Plug in technology leads Android Technological progress . Hot repair ： Let the application update without reinstallation , Help applications quickly build dynamic repair capabilities . We need to master how to interpret the open source framework through design ideas ！

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[](() Chapter vii.   Picture related



Now? Android The picture loading framework on is very mature , Load frames from the earliest old pictures UniversalImageLoader, Later Google To launch the Volley, Then to the emerging Army Glide and Picasso, Of course, Facebook Of Fresco. Each one is very stable , The functions are also very powerful . And understand the characteristics of each picture library . But their usage scenarios are basically coincident , In other words, we basically only need to focus on Glide Learning and using is enough .

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[](() Chapter viii.  Flutter  relevant



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