Fresh, 2022 advanced Android interview must know 100 questions (interview questions + answer analysis)

2022 The year has quietly arrived , a new year , about Android developers , Also hear 、 I saw a lot of bad news , Many large factories also frequently rush to hot search , This also really makes everyone feel confused about their future .

In fact, in recent years , Many people are constantly singing bad Android Development trend of , although Android It's not as hot as before , With the development of the industry , The requirements of major factories for practitioners are becoming more and more strict , But in fact, those basic knowledge is solid 、 Developers with excellent development skills are still the meat and potatoes of major manufacturers , Many large factories are interested in medium and high-grade products Android Developers are still thirsty for talent .

In order to help you learn better , I'd like to share with you a copy of BAT The boss sorted it out 《2022 Middle and advanced Android Interview must know 100 questions 》, It contains all Android Interview knowledge , It can supply knowledge comprehensively . This document contains Java and Android Two major parts , For reasons of length , Show some knowledge here , There is a free way to get friends in need at the end of the article .

Java part

Section 1 Java Base part

“equals” And “==”、“hashCode” The differences and use scenarios

To talk about Java Member variables , Creation and recycling of local and static variables ？
In the second quarter Java aggregate

Talk about List,Set,Map The difference between ？

HashMap Implementation principle of ？

In the third quarter Java Multithreading

Java What are the ways to use multithreading in ？

How to ensure thread safety ？
The fourth quarter, Java virtual machine

To talk about JAVA Garbage collection mechanism ？
sketch JVM Loading mechanism and loading process of classes in ？

Android part

Section 1 Android The four components are related

Activity And Fragment Several common ways of communication between ？

A brief introduction ContentProvider How to realize data sharing ？

Activity in onNewIntent Method invocation timing and usage scenario ？

Intent Is there a limit on the size of the transmitted data ？ How to solve ？

In the second quarter Android Asynchronous task and message mechanism

HandlerThread Usage scenarios and usage ？

AsyncTask Advantages and disadvantages of ？

Whether the child thread can update UI？ Why? ？

Try to analyze from the perspective of source code Handler Of post and sendMessage Differences of methods and application scenarios ？

In the third quarter Android UI Rendering correlation

Talk about Android Event distribution mechanism of ？

Talk about customization View The process of ？

To talk about Fragment Lazy loading ？

To talk about Activity,View,Window The relationship among the three ？

Please talk Fragment Life cycle of ？

The fourth quarter, Android Performance tuning related

Talk to you about Android Understanding of performance optimization ？

Under what circumstances can memory leakage be caused ？

What circumstances can lead to oom problem ？

Talk about how you optimize App Of the startup process ？

Talk about how to WebView To optimize ？

Section 5 Android Medium IPC

Please answer Android Communication between processes ？

Please tell me about you Binder The understanding of mechanism ?

Talk about AIDL？

Section 6 Android System SDK relevant

Please talk briefly about Android The architecture of the system ？

What is? Lifecycle？ Please analyze its internal principle and usage scenario ？

Please briefly Apk Installation process ？

Section 7 Third party framework analysis

To talk about LeakCanray How it works ？

To talk about RxJava Back pressure principle ？

Section 8 Integrated technology

Please tell me about you MVC and MVP The understanding of the ？

Briefly describe the principle of thermal repair ？

What is? MVVM？ How do you apply it to specific projects ？

Section 9 Data structure

What is bubble sorting ？ How to optimize ？

What is a red-black tree ？ Why red black trees ？

Section 10 Design patterns

What is agent mode ？ How to use ？Android Proxy mode in the source code ？

Let's talk about singleton mode , Builder pattern , Usage scenario of factory mode ？ How to choose ？

Section 11 Computer network

Please briefly Http And Https The difference between ？

Please briefly describe http Process of network request ？

Why do you say Http It is a reliable data transmission protocol ？

Section 12 Kotlin aspect

Please briefly describe what is Kotlin？ What are its characteristics ？

Kotlin Notes in @JvmOverloads The role of ？

stay Kotlin in , What is deconstruction ？ How to use ？

Please talk Kotlin Medium Coroutines, What's the difference between it and thread ？ What are the advantages ？

Kotlin There are several ways to traverse the collection in ？

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