foreword
Among the Android developer skills, if you want to enter a big factory, generally having a better education may have an advantage. But if you rely on hard power, there is also a chance, such as dying on the Framework. Framework knowledge is widely used in various fields of Android, and its importance is obvious.
Becoming an Android Framework master is also a very scarce talent in the current recruitment process, which can be your stepping stone.
Framework, as the Android framework layer, provides many APIs for App to call, but many mechanisms are packaged by Framework for App to use. If you don't know the principles of these mechanisms, it is difficult to optimize on this basis.
Knowledge of Android Framework is widely used in various fields:
Frame drop monitoring
, function instrumentation,
slow function detection,
ANR monitoring,
startup monitoring
...
these all require a deep understanding of Framework. Only those who are familiar with the Framework layer can know how to do monitoring, what mechanism to use to monitor, where to insert function stubs, which class, which method and which attribute should be reflected by the reflection call...
The importance of mastering Android Framework knowledge is self-evident.
.
Framework is like an evergreen skill tree, no matter it is general development or chief architecture, CTO can draw enough technical nourishment from it. Ordinary development often only stays at the stage of " used" or even "heard " of Framework, and there are even some Android engineers who have worked for more than 5 years, while technical backbones and architects often need to have a thorough understanding of the source code of the underlying principles . To put it bluntly, knowing how to use is one aspect, but knowing why is a more scarce ability.
What I want to share with you here is a copy of Ali's internal Android Framework layer learning manual shared to me by a friend of Ali. This is a P7 boss at their place who stayed up late until the early morning every day, and it took half a month to sort it out
Due to the excessive content of the document, in order to avoid affecting your reading experience, only some of the content is shown here with screenshots! (At the end of the article, there is also a small benefit of using the ChatGPT robot!! Don’t miss it)
"Android Framework Source Code Development Secret"
This learning manual deeply analyzes the Android system source code, explains in detail the initialization process of the Android framework and the working principle of the main components, and aims to introduce the core concepts and technologies of the Android Framework through examples and cases, so as to help developers better understand Android applications Program design and development.
This manual is suitable for programmers with certain experience in Android application development, hoping to help developers better understand and master this technology through in-depth study of Android Framework.
Chapter 1 System Startup Process Analysis
The complete startup process of the Android system can be divided into three stages: the Linux system layer, the Android system service layer, and the Zygote process model from the perspective of the system level; knowledge points: the
first
section Android startup overview,
the second section init.rc analysis,
the third section Section Zygote,
Section 4 interview questions
Chapter 2 Cross-process Communication IPC Analysis
As a mechanism for Android inter-process communication, Binder can be regarded as a driver. In Android, common inter-process communication such as system class: phone calls, alarm clocks, etc.; self-created: like WebView, video playback, audio playback, large image browsing, etc.
Chapter 3 Handler Source Code Analysis
Section 1 Source Code Analysis
Section 2 Difficult Questions
Section 3 Handler Frequently Asked Interview Questions
Friends in need scan the QR code below to get it! ! ! !
At the same time, a WeChat group chat robot based on chatGPT was built here to answer difficult technical questions for everyone 24 hours a day.
At the same time, a WeChat group chat robot based on chatGPT was built here to answer difficult technical questions for everyone 24 hours a day .
