More information: shimo.im/docs/9pWDKR… **

Technical knowledge of Android performance tuning has become a required skill in the job search process. It suddenly occurred to me that bytedance’s interview is often asked about the knowledge of Android performance tuning, and this time I almost got caught up in the three aspects because of the performance tuning. Fortunately, I had seen the PDF document of Android360° comprehensive performance tuning compiled by Tencent. So that I could successfully get the offer of Bytedance Android post.

Let’s take a look at the summary of Android360° performance tuning in all aspects:

After nearly ten years of development, Android technology is changing with each passing day. Now Android 10.0 has been released, and the performance of Android system has been very smooth, which can completely match the experience of iOS. To the hands of the major manufacturers, change the source code, custom system, so that the Android native system becomes mixed, and then to the hands of different levels of development engineers, because of the uneven technical level, even if many mobile phones in the running software performance is very high, open the application is still stuck.

APP performance optimization has become a comprehensive quality that developers should have, which is also a guarantee that developers can complete high-quality application works. At present, there are a large number of online articles about Android performance optimization, but they are not comprehensive enough. Now Tencent has made a summary of Android 360° performance optimization in all aspects, as long as 180,000 words PDF document, has been launched on the Internet, has brought a lot of help to many Android development technicians. I was also one of the beneficiaries, which played a decisive role in my offer to Bytedance. I’ll share it with you in my spare time so that it can help more Android developers.

Due to space constraints, each chapter has more detailed content, so I can’t show all the content in this article, only screenshots of the part, the full version of the PDF document is packaged, you just need to click the ** quick access channel :(click here) download! Sincerity full!! **

Chapter one, design ideas and code quality optimization

First, six principles

1. Principle of single responsibility

2. Liskov Substitution Principle

3, Dependence Inversion Principle

4. Interface Segregation Principle

5. Demeter Principle

Composite Reuse Principle

Second, design mode

Generally speaking, design patterns can be divided into three categories:

There are five types of creation patterns: Factory method pattern, Abstract Factory pattern, singleton pattern, Builder pattern,

Prototype pattern.

Structural mode, altogether seven: adapter mode, decorator mode, agent mode, appearance mode, bridge mode

Type, combination mode, enjoy yuan mode

Data structure

  • An array of
  • The stack
  • The queue
  • The list
  • The tree
  • figure
  • The heap
  • Hash table

Four, algorithm

1 sorting algorithm

4.2 Search Algorithm

Chapter two, program performance optimization

Optimization of startup speed and execution efficiency

1. Cold startup and hot startup parsing

2. Solution for APP startup black and white screen

3. APP lag analysis and solution

4. StrictMode for optimization of startup speed and execution efficiency

Systrace and TraceView

  • The introduction of Systrace
  • Systrace keeps track of code
  • How Systrace works
  • Systrace data analysis
  • Systrace example
  • The introduction of TraceView
  • How TraceView works
  • Data analysis of TraceView
  • TraceView example

Layout detection and optimization

1. Hierarchical layout optimization

2. Overrender

Fourth, memory optimization

First, memory leaks

Locate memory leaks

3. Memory jitter

OnTrimMemory and onLowMemory

Fifth, OutOfMemeory

Six, effective reduction of memory occupancy suggestions

Optimization of power consumption

Doze and StandBy modes

Battery Historian

Iii. Use and advantages of JobScheduler and WorkManager

Optimize network transmission and data storage

Define message formats in Google Protobut files

2. 7Z ultimate compression

WebP uses image optimization

APK size optimization

1. APK slimming

Ii. Confusion principle of wechat resources

Eight, screen adaptation

I. Summary of screen configuration scheme

Hook technology to achieve full screen adaptation

Chapter three: Optimization of development efficiency

Git distributed version control system

1. Scenario introduction of enterprise efficient continuous integration platform

2. GIT distributed version control system

3. GIT branch management

Automatic build system Gradle

First, Groovy development environment construction

Gradle is a plugin for Android

2. Basic use of Gradle Transform API

Gradle and Android plugins

Gradle is a plugin for Android

2. Basic use of Gradle Transform API

Third, custom plug-in development

Chapter four: Practice of APP performance optimization in first-line large factories

1. Startup optimization of Alipay APP: Optimize the startup performance of Android terminal by rearranging the layout of the installation package. Optimization practice of Douyin BoostMultiDex: Reduce the initial startup time of APP by 80% on the lower version of Android

2, fluency in Android lag frame loss cause analysis application Bao, Iflyme input method barrier-free services caused by the machine lag analysis toutiao graphic details page second practice

3. APK size optimization Practice of Douyin in APK packet size resource optimization

4, layout optimization youku APP responsive layout technology full analysis

5, network optimization mobile phone Taobao in the network link optimization Baidu APP in the network depth optimization practice

6. Reveal the optimization project of browsing APP performance for 11 billion users of Mobile Taobao Double eleven

7. Autonavi APP full-link source code dependency analysis

8. Complete OOM experience sharing

9. Wechat Android terminal memory optimization practice

The above is the summary of Tencent’s 180,000 words on the performance tuning of Android360° in all aspects. Due to space constraints, there are more subdivided contents in each chapter, so it is not possible to show all the contents in the article. Only screenshots can be taken to show part of the contents. Those who need the full PDF can download it for free at GitHub. Be a diligent and upward person, study harder, seize the center, ning jing not miscellaneous, ning designed not more.

For more information: [shimo.im/docs/9pWDKR…]

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