Preface
The following questions are all encountered during the interview in the Android communication group. If you have good questions or good insights, welcome to share, and the host will maintain this post for a long time.
Reference analysis : Guo Lin, Hongyang, Yugang, Geek Time, Tencent Class...
Content Features : Clearly organized, including graphical representations that are easier to understand.
Content summary : Including Handler, Activity-related, Fragment, service, layout optimization, AsyncTask-related
, Android event distribution mechanism, Binder, Android advanced essential: AMS, WMS, PMS, Glide, Android componentization and plug-in and other interview questions and technologies Stack!
Handler related knowledge, interview must ask!
Frequently asked points:
What is the relationship between Handler Looper Message?
What is the data structure of Messagequeue? Why use this data structure?
How to create Handler in child thread? How does
Handler post method work?
The principle of Android message mechanism and source code analysis
Android Handler message mechanism
Activity related
Startup mode and usage scenario?
onNewIntent() and onConfigurationChanged()
onSaveInstanceState () and onRestoreInstanceState()
How do activities start?
Start mode and usage scenarios
onSaveInstanceState and
onRestoreInstanceState use onConfigurationChanged use and problem solving
Activity start process analysis
Fragment
Fragment life cycle and Activity comparison
How to communicate between
Fragment startActivityForResult
Fragment overlap problem
Fragment explore
Fragment overlap, how to communicate
Fragment life cycle
Service related
The running thread of the process keep alive Service (all life cycle methods are in the main thread)
How to start the Service and how to stop
the callback method in ServiceConnection in which thread?
The difference between startService and bingService The
general routine
of process keep-alive Everything you need to know about process keep-alive
Android layout optimization of ViewStub, include, merge
When to use ViewStub, include, merge?
What is their principle?
ViewStub, include, merge concept analysis
Android layout optimization ViewStub, include, merge use and source code analysis
BroadcastReceiver related
Registration method, priority,
broadcast type, difference,
broadcast usage scenarios and principles,
Android broadcast dynamic static registration,
common usage and process analysis,
broadcast source code analysis
AsyncTask related
Is AsyncTask executed serially or in parallel?
AsyncTask with the changes of Android version
AsyncTask is fully resolved
serial or parallel
Android event distribution mechanism
The difference between onTouch and onTouchEvent, the calling sequence
dispatchTouchEvent, onTouchEvent, onInterceptTouchEvent method sequence and usage scenarios
Sliding conflict, how to resolve
event distribution mechanism
event distribution analysis
dispatchTouchEvent, onTouchEvent, onInterceptTouchEvent method usage scenario analysis
Android View drawing process
Briefly describe
the points that need attention in the onMeasure, onlayout, and ondraw methods of the View drawing process
How to customize the View
view redraw mechanism
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Android LayoutInflater principle analysis, take you step by step in-depth understanding of View (1)
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Android view state and redraw process analysis, take you step by step in-depth understanding of View (2)
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Android view state and redraw process analysis, take you step by step in-depth understanding of View (3)
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The realization method of Android custom View, take you step by step in-depth understanding of View (4)
Android Window, Activity, DecorView and ViewRoot
The relationship between Window, Activity, DecorView and ViewRoot
Android's core Binder multi-process AIDL
Common IPC mechanism and usage scenarios
Why does Android use binder for cross-process transmission
problems caused by multi-process
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Analysis of AIDL use
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Binder principle analysis
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Binder bottom analysis
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Multi-process communication mode and the problems it brings
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Comparison of multi-process communication methods
Android advanced essentials: AMS, WMS, PMS
AMS, WMS, PMS creation process
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AMS, WMS, PMS full analysis
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AMS startup process
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Analysis of WindowManagerService startup process
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PMS startup process analysis
Android ANR
Why does ANR happen?
How to locate ANR?
How to avoid ANR?
What is ANR,
how to avoid it and the analysis method of
Android performance optimization ANR detailed explanation
Android memory related
Note: Memory leak and memory overflow are two concepts
Under what circumstances will memory leaks?
How to prevent memory leaks?
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The difference between memory leak and overflow
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OOM concept and Android memory management mechanism
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Possibility of memory leak
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Ways to prevent memory leaks
Android screen adaptation
Screen adaptation related terms analysis The
current popular screen adaptation methods
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Screen adaptation terms and concept analysis
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Toutiao Technology Adaptation Program
Android caching mechanism
LruCache uses extremely principle
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Android caching mechanism
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LruCache usage and principles
Android performance optimization
Positioning and how to optimize the power consumption of the memory cpu
method frequently used to optimize the performance of
how to avoid UI Caton
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Performance optimization full analysis, tool usage
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Best practices for performance optimization
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Know the high praise article
Android MVC、MVP、MVVM
Which one should I choose? Pros and cons
Ren Yugang's Article: Design Pattern Selection
Android Gradle knowledge
These two official articles are basic enough. You
must post the official document: Configuration and Build
Gradle Tips and Tricks
Gradle plug-in understanding is just fine
Gradle custom plug-in method
Comprehensive understanding of Gradle-execution timing
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Gradle series one
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Gradle series two
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Gradle series three
RxJava
Use process, characteristics, principles to analyze
RxJava nouns and how to use
Rxjava observer pattern principles to analyze
Rxjava subscription process, thread switching, source code analysis series
OKHTTP 和 Retrofit
OKHTTP completely analyzes the
use process of Retrofit, and the mechanism is explained in detail. How does Retrofit work
from HTTP to Retrofit
?
The most popular image loading library: Glide
Guoshen series Glide analyzes the
most complete analysis of Android image loading framework (1), the basic usage of Glide, the
most complete analysis of Android image loading framework (2), understands the execution process of Glide from the perspective of source code, the
most complete analysis of Android image loading framework (3) , In-depth exploration of Glide's caching mechanism, the
most comprehensive analysis of Android image loading framework (4), the most comprehensive analysis of Glide's callback and monitoring
Android image loading framework (5), Glide's powerful image transformation function, the
most comprehensive analysis of Android image loading framework ( Six), explore Glide's custom module function, the
most comprehensive analysis of the Android image loading framework (7), realize the Glide image loading function with progress, the
most comprehensive analysis of the Android image loading framework (8), and give you a comprehensive understanding of the usage of Glide 4
Android componentization and plug-inization
Why use componentization?
How do the components communicate?
How to jump between components?
Android plug-in and hot fix knowledge combing
Why use componentization
- Android completely componentized program practice
- Android completely componentized demo released
- Android is completely componentized-code and resource isolation
- Android is completely componentized-UI jump upgrade and transformation
- Android is completely componentized-how to use Arouter
History of plug-in framework
Deep understanding of Android plug-in technology
Android plug-in and hot fix knowledge combing
Due to space limitations, the detailed information of the document is too comprehensive, and the details are too much, so only some of the knowledge points are screenshots for a rough introduction. Each small node has more detailed content!
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