In the field of Android development, there are three main directions: application development, framework development and Linux driver development. Each direction has its unique characteristics and employment prospects.
App Development
It is the field with the largest number of people and the lowest threshold. Because the technical requirements in this field are relatively low, it attracts a large number of developers. However, due to the repetitive nature of business logic and the lack of in-depth technical accumulation, many developers may feel that their technical progress is slow. In addition, as competition in the mobile Internet market intensifies, the employment situation in application development has become increasingly severe.
Framework Development
It is relatively difficult, but it is the most core part of Android development. This field mainly involves the development of the internal mechanisms and core components of the Android system, such as system-level UI design, network communication, security mechanisms, etc. Since framework development requires an in-depth understanding of the underlying principles of the Android system, the technical requirements for developers are relatively high, but correspondingly, the employment prospects and competitiveness in this field are also good. Currently, with the development of the Internet of Vehicles and the Internet of Things, the demand for framework development is gradually increasing.
Linux driver development
It belongs to the category of embedded development and is somewhat related to Android development, but it is not its main field. This field requires developers to have deep Linux system and kernel-level programming capabilities, so the technical requirements are high. However, due to the limitations and technical difficulties of the embedded development market, the employment prospects in this field are relatively stable, but there is also a certain market demand.
If you still want to engage in Android development, it is recommended that you consider taking the direction of Android framework development. This field has high technical requirements, but correspondingly, its employment prospects and competitiveness are also good . At the same time, through in-depth study of the underlying principles and core component development of the Android system, you can continue to improve your technical level and career development potential. Of course, no matter which direction you choose, you need to continue to learn and improve your technical capabilities to adapt to market changes and needs.
Industry Trends
In the past two days, I have been talking about the Android industry trends with my friends. As college students change careers and graduates, they are pouring into the Android industry crazily. Wanting to get better treatment and opportunities, constantly mastering new skills, and improving business capabilities have become urgent problems that people in the Android industry need to solve. No matter what level of Android engineer you are interviewing, the interviewer will always ask, "Do you know the Framework? Have you seen the underlying source code?", so they still stay at the application development level, do not improve the technology, and have to face the pressure of the Yangtze River to push the waves ahead. . They can only accept the dilemma and even face elimination in the end. Not to mention the appreciation and salary increase
Therefore, how to achieve the goal of technical improvement from application to system is a stage that many junior and intermediate Android people must go through. As someone who has experienced this, I have a deep understanding of the difficulties in the learning process. Therefore, I am keen on collecting and organizing resources and recording the process from stepping on pitfalls to climbing pitfalls. I hope to record what I have learned, the techniques used in actual work, self-study methods, experiences, and some pitfalls I have encountered. One is to organize yourself better, and the other is to be able to share better with the community.
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"Android Framework Source Code Development Revealed"
This study manual deeply analyzes the Android system source code, explains in detail the initialization process of the Android framework and the working principles of the main components. It aims to introduce the core concepts and technologies of the Android Framework through examples and cases, thereby helping developers better understand Android applications. Program design and development. This manual is suitable for programmers with some experience in Android application development. It is hoped that through in-depth study of the Android Framework, it can help developers better understand and master this technology.
Chapter 1 System Startup Process Analysis
The complete startup process of the Android system can be divided into three stages from the perspective of system level: Linux system layer, Android system service layer, and Zygote process model; Knowledge points:
Section 1 Android startup overview,
Section 2 init.rc analysis,
Section 3 Zygote,
Section 4 Interview Questions
Chapter 2 Cross-process Communication IPC Analysis
Binder, as the communication mechanism between Android processes, can be regarded as a driver. In Android, common inter-process communications include system-based ones: phone calls, alarm clocks, etc.; self-created ones like WebView, video playback, audio playback, large picture browsing, etc.
Chapter 3 Handler source code analysis
Section 1 Source Code Analysis
Section 2 Difficult Questions
Section 3 Handler frequently asked interview questions
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