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2022 Android interview essential knowledge points, a comprehensive summary
2022-07-07 06:25:00 【Big fish SS】
Preface
All the knowledge points of this article are summarized after personal experience of more than ten first and second tier Internet enterprises , Including the application Android Develop high-frequency knowledge points in all aspects of the post , Mainly for but not limited to Android Fresh interview . All the following knowledge points are sorted and published in Github/Gitbook, It is convenient for everyone to organize and study , Link at the end of the article .
author :Ruheng
link :https://www.jianshu.com/p/3df3d2974234
1 Java
1.1Java Basics
- Java Collections framework
- Java aggregate ——ArrayList
- Java aggregate ——LinkedList
- Java aggregate ——HashMap
- Java aggregate ——TreeMap
- Java aggregate ——LinkedHashMap
- Java Generic
- Java Reflection
- Java annotation
- Java IO
- RandomAccessFile
- Java NIO
- Java Unusual details
- Java The difference between abstract classes and interfaces
- Java Deep copy and light copy
- Java transient keyword
- Java finally And return Execution order
- Java 8 New characteristics
1.2Java Concurrent
- Java There are three ways to create a thread
- Java Thread pool
- Deadlock
- Synchronized/ReentrantLock
- producer / Consumer model
- volatile keyword
- CAS Atomic manipulation
- AbstractQueuedSynchronizer Detailed explanation
- In depth understanding of ReentrantLock
- Java Concurrent sets ——ArrayBlockingQueue
- Java Concurrent sets ——LinkedBlockingQueue
- Java Concurrent sets ——ConcurrentHashMap
1.3Java virtual machine
- Object creation 、 Memory layout and access location
- Java Memory area and memory model
- Java Class loading mechanism and class loader details
- JVM Garbage collection algorithm and garbage collector details
- JVM How to judge whether the object is dead ?
2 Android
2.1Android Basics
- Activity All round analysis
- Service All round analysis
- BroadcastReceiver All round analysis
- ContentProvider All round analysis
- Fragment Detailed explanation
- Android Message mechanism
- Android Event distribution mechanism
- AsyncTask Detailed explanation
- HandlerThread Detailed explanation
- IntentService Detailed explanation
- LruCache Principle analysis
- Window、Activity、DecorView as well as ViewRoot The relationship between
- View measurement 、 Layout and drawing principle
- Android Virtual machine and compiling process
- Android Interprocess communication mode
- Android Bitmap Compression strategy
- Android Animation summary
- Android Process priority
- Android Context Detailed explanation
2.2Android Advanced
- Android Multi thread breakpoint continuation
- Android Global exception handling
- Android MVP Model details
- Android Binder Mechanism and AIDL Use
- Android Parcelable and Serializable The difference between
- One APP From Startup to main page, it shows the process that has gone through ?
- Android Performance optimization summary
- Android Summary of memory leaks
- Android Layout optimization include、merge、ViewStub Use
- Android Authority handling
- Android Principle of thermal repair
- Android Getting started with plug-in
- VirtualApk analysis
- Android Push technology analysis
- Android Apk setup script
- PopupWindow and Dialog difference
2.3 Open source framework
- OkHttp analysis
- Retrofit analysis
- EventBus analysis
3 data structure
- The linear table
- Stacks and teams
- Trees
The foundation of the tree
Other common trees
Union checking set
B- Trees ,B+ Trees ,B* Trees
- chart
The foundation of the picture
A topological sort
Kruskal Algorithm
Prim Algorithm
Dijkstra Algorithm
Floyd Algorithm
- Hash lookup
- Sort
- Massive data processing
4 Algorithm
- The finger of the sword offer
- LeetCode
5 Design patterns
- Create pattern
Simple factory model
Factory method model
Abstract factory pattern
The singleton pattern
Builder pattern
- Structural mode
Adapter mode appearance mode
Decorator mode
The proxy pattern
- Behavioral patterns
Command mode
Iterator pattern
Observer mode
The strategy pattern
Template method pattern
6 computer network
- TCP/IP
- HTTP
- HTTPS
7 operating system
- summary
- Processes and threads
- memory management
8 database
- SQL sentence
Github Address :https://github.com/LRH1993/android_interview
summary
This is the end of it , Put a little benefit at the end of the article , The following is a story about Flutter Learning ideas and direction , Engaged in Internet development , The most important thing is to learn technology well , And learning technology is a slow and hard road , You can't rely on a moment of passion , It's not like you can learn it in a few days and nights , We must form the habit of studying hard at ordinary times , More effective learning needs to be achieved .
Because of the large amount of content, I only put a general outline , If you need to learn mind mapping in more detail, you can scan the QR code below for free .
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