Preface:
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.
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