Android Development Guide! In-depth analysis of the complete process of job-hopping from the beginning to the end, knowing that the upturn is crazy!

preamble

This article hopes to help understand some concepts in official documents by uncovering some hidden technical details of React.

Readers can see this article as a supplement to the official document

The writing method I use is a question-answer method, that is, first according to the usage rules given in the official document, propose Why, and then we will answer these Why according to the actual debugging, and finally systematically organize these Why into How, if you have A better way of writing, also welcome to leave a message to discuss

In addition, for the reading experience, I will not paste too much source code to avoid interrupting readers' thoughts.

Android basics

1.Activity

1. What is Activity?
2. Please describe the life cycle of Activity
...

2.Service
3.Broadcast Receiver32
4.ContentProvider
5.ListView
6.Intent
7.Fragment

1. How to transfer values between
Fragment and Activity 2. Describe the life cycle of Fragment
3. The difference between the replace and add methods of Fragment
...

Android Advanced

1. Java

1. What is the Java memory model and thread management?
2. How do DVM and ART optimize JVM? Do you think there is room for optimization?
3. What is the class file structure at the bytecode level?
...

2. Advanced UI (★★★★★)

1. What are the principles and calculation rules of MeasureSpec?
2. What is the most complicated view you have ever written? What are the complexities encountered?
3. How does Android interact through Activity?
...

3. Android performance optimization (★★★★★)

1. What is the direction to optimize the performance of the Android app?
2. Under what circumstances will lead to performance optimization and how to avoid it?
3. Have you ever used leakCanary? What is its monitoring principle?
4. Is the profile proficient? What aspects of performance can be used to analyze? Do you master its principle?
5. In the face of UI lag, what aspects should we analyze and solve?
...

4. Android source code (★★★★)

1. What is the event distribution mechanism? Why should the designer set up interception?
2. How does Android render through View?
3. What is the process of installing Android App?
...

Open source framework combat

1. Which frameworks and platforms have been used in development (★★★★★)

EventBus (event processing)
xUtils (network, image, ORM)
JPush (push platform ) Youmeng (
statistics platform) Youmi (youmi
) (advertising platform)
Baidu map
bmob (server platform, SMS verification, email verification, third-party payment )
Alibaba Cloud OSS (Cloud Storage)
……

2. Which custom controls have you used (★★★★)

3. Custom control: the realization process of drawing a circle (★★)

4. Custom control: the realization process of the Ferris wheel (★★)

5. Custom control: the implementation process of drag-and-drop sortable GridLayout (★★)

6. The realization process of flow layout (★★★★)

7. The **** process of the project (★★★★★)

8. Common interview questions in the project

9. How is instant messaging done? (★★★★★)

10. Six principles of design patterns (★★★)

11. Third party login (★★★★)

12. Third party payment (★★★★★)

13. Analysis of common frameworks (★★★★★)

JAVA interview questions

1. JAVA basics

1. What are the reference types in Java?
2. What is overloading, what is rewriting, and what is the difference?
3. The difference between String, StringBuffer and StringBuilder
4. How are the keywords final and static used
...

2. Design patterns in JAVA (★★★★)

1. What are the design patterns you know?
2. Singleton design patterns
3. Factory design patterns
...

Full analysis of Flutter related interview questions

1. DART section

Features of the Dart language?
Some important concepts of Dart?
What does the "..." in Dart mean?
How does Dart multitasking work in parallel?
Is Dart passed by value or by reference?

2. FLUTTER section

1. Why is flutter native?
2. Talk about several features/pros and cons of flutter
3. Comparison of Flutter and RN.
...

Android high-frequency interview questions collection

A collection of Android high-frequency interview questions collected by Tencent, Ali, Baidu, Meituan, ByteDance, JD, etc. (Part of the interview questions are displayed, the complete questions and answer analysis can be obtained at the end of the article)

1. Android event distribution mechanism
2. Android view drawing mechanism and loading process
3. The loading process of the four major components of android, please introduce in detail
4. Activity startup mode
...
51. Memory leak
52. Over-drawing, lagging optimization
53 . apk slimming
54. The formation of ANR, what is the time limit for ARN to appear on each component?
...

Many things that are asked in interviews are based on principles.

**To become a senior Android engineer, you must master a lot of basic knowledge. **In work, these principles can greatly help us understand technology, and in interviews, it can help us deal with the difficulties of interviewers from big factories.