It's enough to read this article to analyze the principle in depth

Preface

Reality is ,99% The professional , No future when you get older . No future is the fate of most ordinary people , People with good prospects don't have to wait until they are old . It doesn't matter whether there is a future or not , No matter what you do , A healthy mind is always the first .

From my personal point of view 30 The feeling of a multi-year-old coder ： It's true that age pressure is increasing . For example, young people in their twenties , Maybe you know everything , Familiar with the group . Sometimes I wonder if I'm not intelligent enough , Is the ability of self-study too poor , Is the foundation not good , Is everyone else working overtime , You know, 30 The sense of crisis of people in their twenties .

Collector's Edition （1）—— senior  UI  promotion

Section 1 、 Touch event distribution mechanism

• Preface

• brief introduction

• Distributed objects

• Components that distribute Events

• The core method of distribution

• Event distribution process

• summary

In the second quarter 、View  Rendering mechanism

1、 Why  16ms2、 Why?  16ms  If you don't finish the drawing, you'll get stuck 3、 Rendering principle 4、 Over drawing （overdraw）* testing .5、Overdraw  Treatment plan of 6、 Reduce unnecessary levels ： Skillfully use  Hierarchy Viewer

In the third quarter 、 Commonly used  View

1、RecycleView2、CardView  Use 3、ViewPager4、WebView

The fourth quarter, 、 Layout  ViewGroup

1、UI  Description of 2、 User interface layout 3、  stay  Android  Several common  View  Layout 4、  Several important layouts

Section 5 、 Customize  View  actual combat

1、Canvas2、 Paint3、 Introduce resources .4、 Use

Collector's Edition （2）——Android  Component kernel

Section 1 、Activity  The call stack

1、 origin 2、Activity form 3、 Life cycle 4、Activity Start and destroy process 5、Activity The process of recreating 6、Android Task stack Introduction

In the second quarter 、Fragment Management and kernel

• 1、Fragment Transaction management source code analysis
  1.1 summary 1.2 Analysis entrance 1.3 The code analysis

• 2、Fragment Transition animation
  2.1 Standard transition animation ：2.2 Custom transition animation 2.3 android.app.Fragment

• 3、 Fragment nesting Fragment Use getChildFragmentManager
  In the third quarter 、Service Kernel principle

• One  startService And bindService The difference between
  1、 Life cycle differences 2、 How does the caller get the bound Service Methods 3、 Both use startService Use again bindService The situation of 4、 Local services and remote services 5、 Code instance 6、 stay AndroidManifest.xml in Service Element common options

• Two   Multithreading IntentService How it works  &  Source code analysis
  2.1.1 Flow diagram 2.1.2  Particular attention 2.2.  Source code analysis

• 2.3.  Source code summary III 、 Front desk service and notification 3.1  What is front desk service 3.2  notice
  The fourth quarter, 、 Communication scheme between components in kernel
  One 、Activity And Fragment Communication interaction between two 、Service and Activity Mutual communication three 、 Intent Transfer data size limit
  Section 5 、 Communication scheme between components
  One 、ViewModel  And  View  Communication II 、EventBus Source code analysis

• 

Collector's Edition （3）—— It's necessary for large projects IPC

Section 1 、Binder  Principle of mechanism

Abstract Introduction 1. Object oriented  Binder IPC2.Binder  Model 3.Binder  agreement

In the second quarter 、 other  IPC  The way

• IPC  Of  6  Ways of planting
  1.Bundle2. Use file sharing 3.Messenger4.AIDL5.ContentProvider6.Socket

Collector's Edition （4）—— Data persistence

Section 1 、Android file system

1. Preface 2. Internal storage 3  External storage 4  Access permissions 5  Detailed explanation Android Authority mechanism 6  Usability check 7  Public documents （ Shared files ）8  Private documents 9  Cache file

In the second quarter 、 Lightweight Kv Persistence

1、SharedPreferences Detailed explanation and principle analysis 2、 WeChat MMKV Source code analysis

In the third quarter 、 embedded database  SQLite

1、 function 2、 internal structure 3、 data type

Collector's Edition （5）——Framework  Kernel parsing

Section 1 、XMS  Kernel Management

• One 、AMS  family
  1、AMS Start process 2、Lifecycle3.ActivityStackSupervisor#startSpecificActivityLoc4.ActivityStackSupervisor#getProcessRecordLocked()5.Instrumentation#execStartActivity()6.ActivityManagerNative#onTransact()7.ActivityManagerService#startActivity()
  Two 、WMS

• 1.WMS summary
  Window management is the transfer station of window animation input system Surface management

• 2.WMS The birth of
  3、 ... and 、PackageMS start-up

• PackageMS Related framework classes 2.PackageMS The boot process

In the second quarter 、Handler Message mechanism

Handler summary 1、Handler The most common way to use it ：2、 Communication between two subthreads 3 Handler Add

In the third quarter 、 Layout loading and resource system

1、LayoutManager2、Resources  and  AssetManager

Full preparation for the interview

Some basic knowledge and theories must be memorized , To understand the back , Sum up in your own words and recite it .

although  Android  It's not as hot as it was a few years ago , It's past the era when you can find high paying jobs with four components . It just means  Android  The posts below the intermediate level are saturated ,

At present, there is still a lack of senior engineers

, I can clearly feel that there are many more senior positions after the national day , So it's important to try to be a senior engineer .

Okay , I hope that's helpful .

Next, I'll sort out some Android Learning materials ,

Interested friends can pay attention to my free collection method

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