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《2022 newest Android Summary of advanced interview questions 》

Android The four components are related

Activity And Fragment Several common ways of communication between ？
LaunchMode Application scenarios of ？
BroadcastReceiver And LocalBroadcastReceiver What's the difference? ？
about Context, How much do you know ?
IntentFilter What is it? ？ What are the usage scenarios ？
To talk about startService and bindService The difference between , Life cycle and usage scenarios ？
Service How to keep alive ？
A brief introduction ContentProvider How to realize data sharing ？
When switching between horizontal and vertical screens Activity Life cycle of ?
Activity in onNewIntent Method invocation timing and usage scenario ？
Intent Is there a limit on the size of the transmitted data ？ How to solve ？
say something ContentProvider、ContentResolver、ContentObserver The relationship between ？
say something Activity Loading process ？

Android Asynchronous task and message mechanism

HandlerThread Usage scenarios and usage ？
IntentService Application scenarios and use gestures ？
AsyncTask Advantages and disadvantages of ？
Talk to you about Activity.runOnUiThread The understanding of the ？
Whether the child thread can update UI？ Why? ？
Talk about Handler Mechanism and principle ？
Why create in child thread Handler Would throw exceptions ？
Try to analyze from the perspective of source code Handler Of post and sendMessage Differences of methods and application scenarios ？
Handler There is Loop Dead cycle , Why not block the main thread , What is the principle ?

Android Performance tuning related

Talk to you about Android Understanding of performance optimization ？
Under what circumstances can memory leakage be caused ？
Customize Handler How to effectively avoid memory leakage when ？
What circumstances can lead to oom problem ？
ANR Scenarios and solutions ？
Talk about Android Memory optimization in ？
Talk about the skills of layout optimization ？
Android Picture optimization scheme in ？
Android Native Crash How to analyze and locate the problem ？
Talk about how to give apk Slimming ？
Talk about how you optimize App Of the startup process ？
Talk about the steps of code obfuscation ？
Talk about App Power optimization ？
Talk about how to WebView To optimize ？
How to handle the loading of large drawings ？
Talk about how to optimize network requests ？
Please talk about how to load Bitmap And prevent memory overflow ？

Android UI Rendering correlation

Android Make up the difference between animation and attribute animation ？
Window and DecorView What is it? ?DecorView How to communicate with Window To make a connection ?
Briefly Android in UI Refresh mechanism of ？
LinearLayout, FrameLayout,RelativeLayout Which is more efficient , Why? ？
Talk about Android Event distribution mechanism of ？
Talk about customization View The process of ？
in the light of RecyclerView What optimizations have you made ？
Talk about how to optimize ListView？
Talk about customization LayoutManager The process of ？
What is? RemoteViews？ What are the use scenarios ？
Talk about getting View Several methods of width and height ？
Talk about interpolator and estimator ？
getDimension、getDimensionPixelOffset and getDimensionPixelSize Differences among the three ？
Please talk about... In the source code StaticLayout Usage and application scenarios ？
used ConstraintLayout Do you ？ What are its characteristics ？
About LayoutInflater, How it passes inflate Method to get the specific View Of ？
To talk about Fragment Lazy loading ？
Talk about RecyclerView Cache mechanism ？
Please talk View.inflate and LayoutInflater.inflate The difference between ？
Please talk invalidate() and postInvalidate() Differences of methods and application scenarios ？
Talk about customization View And customization ViewGroup？
To talk about SurfaceView And TextureView Usage scenarios and usage ？
To talk about RecyclerView.Adapter How are the refresh methods different ？
Talk to you about Window and WindowManager The understanding of the ？
To talk about Activity,View,Window The relationship among the three ？
I know WindowInsets Do you ？ What applications does it have ？
Android in View Differences between several common displacement modes ？
Why? ViewPager nesting ViewPager, Inside ViewPager Scrolling is not blocked ？
Please talk Fragment Life cycle of ？
Please talk about what is synchronization barrier ？
To talk about ViewDragHelper How it works ？
Talk about the screen refresh mechanism ？

Kotlin aspect

Please briefly describe what is Kotlin？ What are its characteristics ？
Kotlin Notes in @JvmOverloads The role of ？
Kotlin in List And MutableList The difference between ？
Kotlin Several common ways to implement singleton in ？
Talk to you about Kotlin Medium data Keyword understanding ？ What are the characteristics compared with ordinary classes ？
What are delegate properties ？ Please briefly talk about its usage scenario and principle ？
Please give an example of Kotlin in with And apply Application scenarios and differences of functions ？
Kotlin in Unit The role of type and its relationship with Java in Void The difference between ？
Kotlin in infix The principle and usage scenario of keywords ？
Kotlin What are the visibility modifiers in ？ Compared with Java What's the difference? ？
You feel Kotlin And Java What problems should be paid attention to in hybrid development ？
stay Kotlin in , What is deconstruction ？ How to use ？
Talk about kotlin Construction method in ？ What are the precautions ？
Talk about Kotlin Medium Sequence, Why does it handle collection operations more efficiently ？
Please talk Kotlin Medium Coroutines, What's the difference between it and thread ？ What are the advantages ？
Kotlin How to safely handle nullable types ？
say something Kotlin Medium Any And Java Medium Object What are the similarities and differences? ？
Kotlin Does the data type in have implicit conversion ？ Why? ？
Kotlin There are several ways to traverse the collection in ？

Android Medium IPC

Please answer Android Communication between processes ？
Please tell me about you Binder The understanding of mechanism ？
Talk about AIDL？

Android System SDK relevant

Please talk briefly about Android The architecture of the system ？
SharedPreferences Is it thread safe ？ its commit and apply What's the difference ？
Serializable and Parcelable The difference between ?
Please give us a brief introduction Android 7.0 New features ？
Talk about ArrayMap and HashMap The difference between ？
In a nutshell LruCache Principle ？
Why recommend SparseArray Instead of HashMap？
PathClassLoader and DexClassLoader What's the difference ？
say something HttpClient And HttpUrlConnection The difference between ？ And talk about why the former was replaced ？
What is? Lifecycle？ Please analyze its internal principle and usage scenario ？
To talk about Android Signature mechanism of ？
Talk about Android apk Build process ？
Briefly Android 8.0、9.0 What new features have been added ？
Talk about Android10 What has been updated ? How to adapt ?
Please briefly Apk Installation process ？
Java And JS How code is muted ？ Have you done relevant optimization ？
What is? JNI？ Let's talk about how to realize Java And C++ Intermodulation of ？
Please briefly start by clicking the icon app Startup process ？

Third party framework analysis

To talk about LeakCanray How it works ？
To talk about EventBus Principle ？
Talk about interceptors in network requests （Interceptor）？
To talk about Glide Cache mechanism ？
ViewModel What problems do you want to solve ？ And briefly talk about its internal principle ？
Please talk about the dependency injection framework ButterKnife Implementation principle of ？
To talk about RxJava Back pressure principle ？

Integrated technology

Please tell me about you MVC and MVP The understanding of the ？
Introduce what you know Android Several storage methods ？
Briefly describe the principle of thermal repair ？
Talk about how to adapt to more models ？
Please talk about how you carry out multi-channel packaging ？
MVP How do you deal with Presenter Layer to prevent memory leakage ？
How to calculate the memory space occupied by a picture ？
Have you met 64k problem , How to solve ？
How to optimize Gradle The speed of building ？
How to get Android Unique equipment ID？
To talk about Android P Ban http What's the impact on our development ？
What is? AOP？ stay Android What application scenarios does it have in ？
What is? MVVM？ How do you apply it to specific projects ？
Please talk about how you realize data embedding ？
If you realize the breakpoint upload function , What do you think should be done ？
webp and svg What are the characteristics of the pictures in different formats ？ How to be in Android Use in ？
Tell me how you do unit testing ？ And how to apply it to MVP and MVVM in ？
about GIF What are the ideas and suggestions for image loading ？
Why migrate the project to AndroidX？ How to migrate ？

Data structure

What is bubble sorting ？ How to optimize ？
Please use Java Implement a simple single linked list ？
How to reverse a single linked list ？
Talk about your understanding of time complexity and space complexity ？
Talk about how to judge a linked list into a ring ？
What is a red-black tree ？ Why red black trees ？
What is a quick sort ？ How to optimize ？
Talk about circular queues ？
How to judge the cross of single linked list

Design patterns

Please briefly talk about singleton mode ？
How much do you know about the six basic principles of object orientation ？
Please list several common factory patterns and explain their usage ？
Talk about the design patterns and usage scenarios used in the project ？
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 ？
Talk about your understanding of prototype patterns ？
Please talk about the principle of strategy mode and its application scenario ？
The difference between static agent and dynamic agent , What scenarios to use ？
Let's talk about the usage scenario of the responsibility chain model ？

Computer network

Please briefly Http And Https The difference between ？
say https,udp,socket difference ？
Please briefly describe http Process of network request ？
To talk about TCP/IP Three handshakes , Four waves ？
Why do you say Http It is a reliable data transmission protocol ？
TCP/IP What are the layers of the agreement ？TCP and HTTP branch
Which floor do you belong to ？

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