feeling

There is a 80/20 rule that works in many places in the world, and I think it works in Android development as well. As an Android developer, you may only use 20 percent of what you know about Android development, but 80 percent of it you may not be able to use. Xiaobian think should: seize the center, ning Jing not miscellaneous, ning designed not more.

Interviewers, on the other hand, may only know 20% of what you know, and there’s not enough time in an interview to show you all you know. Instead, they focus on the 20% that are most commonly encountered during development.

At this point, the depth of your understanding of these issues is particularly important. You answered 10 questions, each of which was only a superficial analysis, and you won’t be able to give the interviewer more credit for being thorough and thorough about a question.

This doesn’t mean that when you’re preparing for a job change or interview, you should focus on a few topics that interest you, cram them in, and leave everything else out.

One of the easiest and safest ways to beat the interviewer in an interview is to complete a complete set of questions before summarizing yourself.

This is how I successfully joined bytedance from a small factory. Of course, the biggest “contribution” is a very systematic set of Android factory interview questions I collected before (with in-depth answer analysis).

Next, please allow me to share with you this great “hero”, if you are preparing for the New Year interview or job-hopping, I believe it will be very helpful to you. Due to the length of the reasons, only partial screenshots show, need a complete PDF document friends can like + attention, at the end of the package to get!

Spring Recruitment + Jinsanyin Four big factory Interview questions collection

Java based

Android based

Android extension knowledge

Android open source library source code analysis

2020 (Tencent, Alibaba, Baidu, Meituan, Bytedance, JD.com, etc.)

As a programmer, you will be eliminated until you reach 35, but the age from 25 to 32 is the golden stage for the career development of an Internet programmer. You must have your own plan for the expansion of business scope, the breadth of technology and the depth of improvement, which will help you to have a sustainable development path in career development, rather than stagnating.

An Android architect learning roadmap is attached below:
  • Essential skills for architects to build foundations

At present, the mainstream Android APP development language is Java language, the biggest feature of Java language is to improve the possibility of software interaction, it can be said that almost all applications of Android phones are written using Java language.

Key points of knowledge: 1. In-depth understanding of Java generics 2. Simple annotations 3. Concurrent programming 4. Data transfer and serialization 5

  • Design ideas read open source frameworks

With the continuous development of Internet enterprises, there are more and more modules in product projects, and the user experience requirements are getting higher and higher. It is more and more difficult to achieve the purpose of small steps and rapid iteration, so plug-in technology is born. Without plug-in technology, meituan and Taobao, which integrate a large number of “apps”, would be several gigabytes in size.

As a result, Android mobile development today is not hotfix, plug-in, componentized, and 80% of interviews fail.

Key points of knowledge: 1, hot repair design 2, plug-in framework design 3, component framework design 4, picture loading framework 5, network access framework design 6, RXJava responsive programming framework design

  • 360° all-round performance tuning

In the hands of development engineers at different levels, due to the uneven technical level, even though many mobile phones have very high performance of scoring software, there is still a lag phenomenon when opening applications.

In addition, as product content iterates and features become more complex, the UI pages become richer, which can become a barrier to smooth operation. To sum up, 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.

1. Design ideas and code quality optimization

2. Program performance optimization

  • Optimization of startup speed and execution efficiency
  • Layout detection and optimization
  • Memory optimization
  • Optimize the power consumption
  • Network transmission and data storage optimization
  • APK size optimization

3. Optimization of development efficiency

  • Git, a distributed version control system
  • Automated build system Gradle

4. Actual project combat

  • startup
  • fluency
  • The practice of Douyin in APK packet size resource optimization
  • Youku responsive layout technology full analysis
  • Network optimization
  • Mobile Taobao Double 11 performance optimization project revealed
  • Autonavi APP full link source code dependency analysis
  • Complete the OOM experience sharing
  • Wechat Android terminal memory optimization practice

  • Android framework architecture

Android FrameWork architecture (advanced UI+FrameWork source code) this piece of knowledge is the most users today, we call Android2013~2016 technology.

Android developers also tend to be familiar with the “used” code because they are used to online Copy code. The familiar is that they work with it almost every day and Copy it every day. What is strange is that although I deal with these codes every day, I have not studied the principle of these codes and the connotation of the code.

This knowledge points: 1, advanced UI promotion 2, Android kernel components 3, large project essential IPC 4, data persistence and serialization 5, Framework kernel parsing

  • NDK Module Development (Audio and Video series)

NDK (Native Development Kit) A software Development Kit based on a Native programming interface that allows you to leverage C and C++ code in Android applications. Programs developed with this tool run directly locally, rather than on a virtual machine.

In Android, the NDK is a collection of tools that extend the Android SDK. The NDK provides a set of tools to help developers quickly develop dynamic libraries in C or C++, and automatically package so and Java applications together as APK.

This article knowledge key points: 1, NDK development of C/C++ introduction 2, JNI module development 3, Linux programming 4, bottom picture processing 5, audio and video development 6, machine learning

  • Flutter learning is advanced

2019 is undoubtedly the year that Flutter technology is in full swing.

Every mobile developer has been fascinated by the features and ideas that Flutter brings with it: “rapid development, expressive and flexible UI, native performance”, from superapps to standalone apps, from pure Flutter to hybrid stacks, Developers have been exploring and applying Flutter technology in a variety of scenarios and are facing a variety of challenges.

Build your first Flutter development environment in Windows. Write your first Flutter APP. Get started with the Flutter Dart language.

  • Wechat small program development

Wechat small program as one of the more popular programming development application scenarios, favored by the market, which makes many developers greedy. But for beginners, it is completely confused, do not know the micro channel small program development and production need to learn those knowledge, friends in need can refer to this article.

This knowledge key points: 1, small program overview and introduction 2, small program UI development 3, API operation 4, shopping mall project combat

  • Android related source code interpretation as long as programmers, whether Java or Android, if not to read the source code, only look at THE API document, it is just stay in the fur, which is unfavorable to the establishment of our knowledge system and complete and the promotion of actual combat technology.

Due to space reasons, the above complete study notes PDF if necessary, you can click the like + comment support little brother,Click here to get it for free!

More information on the Android architecture is available for free here