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After nearly ten years of development, Android technology optimization has been changing with each passing day. Now Android 10.0 has been released, and Android system performance has been very smooth, which can be completely comparable to iOS in experience. In the hands of major manufacturers, changing the source code and customizing the system made the Android native system become a mixed bag, and then in the hands of development engineers at different levels, because the technical level is uneven, even if many mobile phones are running with very high software performance , There is still a lag when opening the application.
APP performance optimization has become a comprehensive quality that developers should have, and it is also a guarantee that developers can complete high-quality application works.
Ali P8 is the boss, yes, it is the boss. National Day spent a whole week to optimize the knowledge points of Android-360° all-round performance, as well as WeChat, Taobao, Douyin, Toutiao, Gaode maps, Youku, etc. The practical experience of 10,000 users APP in performance optimization has been integrated into a set of systematic knowledge notes PDF, from theory to practice, involving all the knowledge points of Android performance optimization, up to 721 pages of e-book! I believe that after reading this document, you will have a more systematic and in-depth understanding of the Android performance tuning knowledge system and various solutions.
Due to the excessive content of the document, in order to avoid affecting everyone's reading experience, only part of the content is shown in screenshots. The 721-page detailed and complete version of [Android-360° Performance Tuning] document collection method: like + follow, then private message The keyword [666] can get a free way to receive it!
First of all, let’s talk about the general interview process for technical positions in Baidu, Tencent, and Alibaba.
- Written test (if introducted, written test can generally be omitted)
2. Telephone interview (one round, there may be a telephone interview or not)
3. On-site interview (3-4 rounds)
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Round 1: Basic technical interview, interview content includes: resume questions, basic computer knowledge, algorithm knowledge/interview questions
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Round 2-3: Advanced technical interview. The content of the interview includes: business-related knowledge, algorithm knowledge/interview questions
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Round 4: Leader interview or HR interview. The content of the interview is mainly the legendary behavior interview (bahavior interview), mainly chat, and then look at your three views
1. The following is the feeling of the mental journey
1. Resume : Basically do not brush people
2. Written test : The test is relatively broad, as long as the foundation is not too bad, and the character is not too bad.
3. Interview : The interviewer asks based on your resume, so it is not difficult . But he will dig deeper step by step in the field you know to see where your limits are. For example, the technology used in the project, the technical books you have read, and the skills you feel good at are all entry points. He uses this more to understand your focus on technology.
Then there is the algorithm, the basic data structure should be used, and the commonly used sorting and search algorithms should be used, and the code will be handwritten.
Then every detail of the project must be understood, and the technology used must be studied in depth. The reason why I fell on both sides is because too many things are in a state of half-knowledge. The interviewer's evaluation of me is: Many things are not enough if they can be used. You have to analyze the principle in depth, and you need to understand the different things. Things, but a class of things.
I feel that the initial questions still depend on the interviewer, but it is still an essential process to improve my professional skills and thinking
2. As an Android senior developer, what technologies need to be mastered
Now interviews tend to pay more attention to basics and depth, and there are many new technologies that will be asked, including audio, artificial intelligence, hybrid development, and even low-level and full-stack aspects.
New technologies are emerging in endlessly. From kotlin last year to Flutter, technology iterations, will you become complacent?
The number of recruitments on the mobile terminal has decreased, but there are more and more mid-to-high-end positions. There are two days of ice and fire, are you on the edge?
Having been a technical code farmer for many years, I don’t want to be content with the status quo. I always want to make a
breakthrough in the project. I don’t know how to start?
So in the following I have sorted out some technical points that senior engineers should know from 5 aspects:
1. If you want to become an architect, you need to master the technical points!
①The first stop of architect growth: UML modeling
- AOP aspect-oriented architecture design
- Implement Taobao-style login framework
- Application of Forward Engineering and Reverse Engineering in UML Diagram
②The second stop of the architect: Analyze the Android system source code without dead ends
- Android Handler source code analysis and its handwritten Handler architecture
- Message linked list principle and reuse mechanism
- Binder core principle and architecture design
- Activity process jump
- Source code analysis of APP startup process
③Android event bus framework design: EventBus ④Component
and plug-in
framework design
⑤Database framework design ⑥OkHttp network access framework design
⑦Glide loading framework design
⑧RxJava2
⑨MVP implementation architecture construction
2. As an Android bottom development engineer, what technical points should you master?
①Basic knowledge: linux.MakeFile.Shell syntax
②AndroidStudio compilation So principle ③Audio and
video capture coding
④Opencv principle and application
⑤Core technology of QQ audio and video call mastering ⑥Artificial
intelligence and smart home
3. As mobile development, how can we break through the bottleneck?
Learn custom controls, NDK, architecture design, mixed development engineers (React native, Weex), performance optimization, and complete commercial project development. To learn technology, we must not only know what it is, but also know why. Our goal is to become Android Senior engineer
At last
Taking into account the length of the article, I made these questions and answers, as well as the questions I encountered in many years of interviews, and some interview materials into PDF documents. If you need a friend, you can send a private message to me [Interview] for free
Click here to receive a summary of Android interview materials
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