The latest interview experience of Android manufacturers in 2022, Android view+handler+binder

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Recently found some readers , The interview message mentioned job hopping . among , There are several programming veterans , Said they were engaged in Android  Years of development , The salary is still turning around , Job hopping and promotion are not very smooth , Very confused . This is obviously a bottleneck period .

In terms of the current environment , It is indeed more difficult to succeed in job hopping this year than in previous years . An obvious feeling ： This year's interview , On one or two sides , It's all tested Android Programmer's technical precipitation .

Recently, nearly  100  Taoali 、 teng  

《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 】

  News 、 Meituan 、 Netease and other companies 2019  Interview questions for , Sort out the technical points into a large and complete “Android  Architects ” Interview questions （ In fact, it took a lot more energy than expected ）, Contains the context of knowledge  +  Branch details , Due to limited space , Here is a part of it in the form of pictures .

Due to the large number of interview questions involved, it leads to a long space , According to the range of frequently asked questions involved in these interview questions, I have summarized and made an advanced learning roadmap ??????? And the answers to the interview questions are shared with you for free , At the end of the article, there is a free way to get ！

View Interview topics

• View Sliding way of

• View Event distribution mechanism of

• View Loading process of

• View Of measure layout  and  draw technological process

• Customize view Some points to pay attention to

• ACTION_DOWN No interception ,ACTION_MOVE ACTION_UP Will it still intercept

Multithreading project

• What is thread

• State of thread

• Thread creation

• Thread the interrupt

• Thread Why can't you use stop Method to stop the thread

• Reentry locks and conditional objects , Synchronization method and synchronization code block

• volatile keyword

• java Memory model

• Atomicity   visibility   Orderliness

• Thread pool ThreadPoolExecutor

• The type of thread pool

• Thread synchronization mechanism and principle , Illustrate with examples

• arrayList And linkedList The time complexity of reading and writing

• Why? HashMap Thread unsafe （hash Collision and expansion lead to ）

• The difference between process threads

• Binder The memory copy process of

• Tradition IPC The communication principle of the mechanism （2 Secondary memory copy ）

• Java Memory model （ Remember that the stack is a memory partition , It's not a model ）

• Class loading process

• When will class initialization be triggered

• The parental commission model

• The benefits of the parental delegation model

• The conditions for deadlock are , How to avoid deadlock

• App Start process

• Android Single thread model

• RecyclerView Can replace... In many ways ListView,Google Why didn't you put ListView Draw an old line ？

• HashMap How to ensure that the elements are evenly distributed

Data structure interview topic

• Introduction to common data structures

• What do concurrent collections know about ？

• list java Sets of and inheritance relationships between sets

• Introduction to container classes and the differences between them

• List,Set,Map The difference between

• HashMap Implementation principle of

• HashMap how put data （ from HashMap Explanation of source code ）？

• HashMap how get data ？

• When two objects hashcode identical , When there is a collision ,HashMap How to deal with it

• If you have two keys hashcode identical , How to get a value object ？

• hashMap How to expand

• ConcurrentHashMap Implementation principle of

• ArrayMap and HashMap Comparison of

• HashTable Realization principle

• HashMap and HashTable The difference between

• HashMap And HashSet The difference between

• HashSet And HashMap How to judge the repetition of set elements ？

• aggregate Set Realization Hash How to prevent collision

• ArrayList and LinkedList The difference between , And application scenarios

Conclusion

• Now with the short video , Tiktok , The popularity of Kwai Fu NDK Module development is becoming more and more important , More and more enterprises need this talent , Along with that, more and more people are learning this area , The development of audio and video , It's often more difficult , And the more difficult technology is NDK The technology inside .

• Audio and video / High definition big picture / Artificial intelligence / live broadcast / Tiktok and so on are the most closely linked with users this year , The technology most related to our life has been looking for the final technology landing platform , It used to be windows System , Now it's the mobile system , In the mobile system, there are also Android Most of them are premise , therefore AndroidNDK Technology is a necessary skill for us .

• Study well NDK, One of them is about C/C++,jni,Linux The foundation needs to be learned , besides , Audio and video codec technology , Streaming protocol ,ffmpeg These are necessary skills for audio and video development , and

• OpenCV/OpenGl/ These are the necessary knowledge of image processing , Here are all the information I collected and some pictures I made in those years , Because I felt that video would be a big trend in those years . So I made some preparations in advance . Now share it with everyone .