The most popular Android open source project on GitHub continues to be updated....

• The biggest pain point of github is that you can’t use it when you get an open source project. Various errors are reported when importing, and the readme cannot be understood. I recommend a link to everyone. All projects have been tested by myself and there are no problems, and all are configured with detailed steps and supporting videos. Commentary, everyone is welcome to star.

• Project address: https://github.com/open-android/Android

• Welcome to follow the WeChat official account, and we will recommend excellent blog posts, open source projects, and videos to you in the long term.

• WeChat public account name: Android useful programmer

Kotlin video learning

• 01-Course Introduction

http://www.365yg.com/item/6445599306496868878/

• 02_kotlin learning method

http://www.365yg.com/item/6445599300020863502/

• 03_kotlin chooses the coach car

http://www.365yg.com/item/6445599302214484494/

• 04_kotlin hello world

http://www.365yg.com/item/6445599304320025102/

• 05_kotlin variables and output

http://www.365yg.com/item/6445599310758281741/

• 06_kotlin binary basics

http://www.365yg.com/item/6445599308682101262/

• 07_kotlin variables and constants type inference

http://www.365yg.com/item/6445599315044860429/

• 08_kotlin variable value range

http://www.365yg.com/item/6445599360783745550/

• 09_Introduction to kotlin functions

http://www.365yg.com/item/6445599317150401037/

• 10_kotlin language boolean

http://www.365yg.com/item/6445599312981262862/

• 11_kotlin command line interactive terminal

http://www.365yg.com/item/6445601227924308494/

• 12_kotlin function enhancement

http://www.365yg.com/item/6445601229983711757/

• 13_kotlin function homework explanation

http://www.365yg.com/item/6445601232097640974/

• 14_kotlin string template

http://www.365yg.com/item/6445601234282873357/

• 15_kotlin conditional control if and else

http://www.365yg.com/item/6445601236556186126/

• 16_kotlin string comparison

http://www.365yg.com/item/6445751177232515597/

• 17_kotlin null value processing

http://www.365yg.com/item/6445752054030795278/

• 18_kotlin’s when expression

http://www.365yg.com/item/6445754613458010638/

• 19_kotlin’s loop and Range

http://www.365yg.com/item/6445772006804685326/

• 20_Getting started with list and map in kotlin

http://www.365yg.com/item/6445776370827002382/

• 21_kotlin functions and functional expressions

http://www.365yg.com/item/6445777260019450382/

• 22_kotlin default parameters and named parameters

http://www.365yg.com/item/6445778515232031245/

• 23_kotlin conversion between strings and numbers

http://www.365yg.com/item/6445779198962303501/

• 24_kotlin human-computer interaction

http://www.365yg.com/item/6445780073856369165/

• 25_kotlin exception handling

http://www.365yg.com/item/6445781489274585613/

• 26_kotlin recursion

http://www.365yg.com/item/6445782843170750990/

• 27_kotlin tail recursion optimization

http://www.365yg.com/item/6445785393433412110/

• 28_Kotlin new chapter idea introduction

http://www.365yg.com/item/6445786897338860045/

• 29_Kotlin object-oriented introduction

http://www.365yg.com/item/6445788208776086029/

• 30_kotlin static properties and dynamic behavior

http://www.365yg.com/item/6445788927897895438/

• 31_Introduction to object-oriented concepts in kotlin

http://www.365yg.com/item/6445789963647713806/

• 32_kotlin object-oriented practice

http://www.365yg.com/item/6445800737300546061/

• 33_kotlin object-oriented practice-washing machine upgrade

http://www.365yg.com/item/6445795869391323661/

• 34_kotlin object-oriented practice-encapsulation

http://www.365yg.com/item/6445796836392305166/

• 35_kotlin object-oriented - inheritance (open and override)

http://www.365yg.com/item/6445798149792465422/

• 36_kotlin abstract classes and inheritance

http://www.365yg.com/item/6445799199903580686/

• 37_kotlin object-oriented-polymorphism

http://www.365yg.com/item/6445799900012610061/

• 38_kotlin object-oriented - abstract classes and interfaces

http://www.365yg.com/item/6445803237701321230/

• 39_kotlin object-oriented-delegate and proxy

http://www.365yg.com/item/6445804765518496269/

• 40_kotlin object-oriented - singleton mode

http://www.365yg.com/item/6445805583856566797/

• 41_kotlin object-oriented-enumeration

http://www.365yg.com/item/6445806126301708814/

• 42_kotlin object-oriented-sealed class

http://www.365yg.com/item/6445807030564291085/

• 43_kotlin follow-up recording plan

http://www.365yg.com/item/6445807663321186830/

• 44_kotlin closure (closure)

http://www.365yg.com/item/6446657322759488014/

• 45_Introduction to kotlin functional programming

http://www.365yg.com/item/6447022080331350541/

• 46_kotlin image processing

http://www.365yg.com/item/6448890155515249165/

• 48_kotlin high-order function practice (traditional function demonstration)

http://toutiao.com/item/6451475254085681677/

• 49_kotlin high-order function practice (disadvantages of traditional demand implementation)

http://toutiao.com/item/6451475398579454477/

• 50_kotlin high-order function practice (3)

http://toutiao.com/item/6451477425070014989/

• 51_kotlin high-order function practice-getting started with custom dsl

http://toutiao.com/item/6451483115935236622/

• For more advanced courses, please refer to Tencent Classroom

https://ke.qq.com/course/233042

Project cases

• One line of code to develop an open source China information page

• Add head to RecyView in one minute

• One line of code to implement carousel images

• Realize pull-down refresh and load more data in one minute

• Complete blog in one minute

• Complete the details page in one minute

• Parse XML in one minute

• Complete detailed software in one minute

• Complete comment building in one minute

• One minute login

• Get cookies in one minute

• Post a comment in one minute

• One minute packet capture

Android interview questions

• 1- The difference between Davik process linux process threads

• 2- aidl implements inter-process communication

• 3- messenger implements inter-process communication

• 4- ContentProvider implements inter-process communication

Questions related to performance optimization

• 5- What is a memory leak

• 6- What is memory overflow

• 7- What situations will cause memory leaks

• 8- Avoid program OOM exceptions

• 9- Thread Pool Principle

• 10- UI performance optimization

• 11- Memory Optimization String Optimization

• 12- Common memory optimization methods

• 13- Performance analysis using hierarchyviewer

• 14- Lint specification code for performance analysis

• 15- Performance Analysis to Avoid Memory Jitter

• 16- Introduction to memory detection tools for performance analysis

Questions related to XMPP

• 17- What is XMPP and XMPP data format

• 18- Display format of real-time chat

• 19- TCP and UDP protocols

• 20- Aurora Push Principle

• 21- Basic concepts of XMPP

• 22- Solutions to common message push

Questions related to login

• 23- Internal implementation principle of WeChat scan login

• 24- Tencent QQ three-party login implementation principle

• 25- Why use Token for login

Questions related to development

• 26- How to be forward compatible with old and new interfaces during iterative development

• 27- Application development process

• 28- ViewPager loading too many pages bug demonstration

• 29- Solution to ViewPager loading too many pages

• 30- Silent installation

• 31- Android source code compilation

• 50- TTF modified text font

• 51- Detailed steps for using Sharesdk

• 52- Screen Adaptation

• 53- Interface callback

• 54- XML to VIEW conversion principle

Source code related test questions

• 32- Volley source code 1

• 33- Volley source code 2

• 34- Volley source code three

• 35- OkHttp3 source code one

• 36- OkHttp3 source code 2

• 37- OkHttp3 source code three

• 38- Annotation Framework Principle

• 39- Context principle

• 40- App startup optimization

Android system customization supporting video:

#Part 3 audio and video:

https://github.com/open-android/Android3

#Part 4 Tools

• LeakCanary Memory leak detection tool

• [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a9bdf305a3a4c00015a500b7aac01d2&chapterId=8a9bdf305a3a4c00015a500ba7db01d3&vId=8a9bdf305a3a 4c00015a500bf5120263&videoId=C51690BA657EBB359C33DC5901307461)

• jsoup web page parser

• [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a2c9bed5a3a4c7e015a4aa700eb0a2a&chapterId=8a2c9bed5a3a4c7e015a4aa767150a2b&vId=8a2c9bed5a3a4c7e0 15a4aa7ad870a2c&videoId=D9C78456B7F047A79C33DC5901307461)

• pinyin4j Pinyin and Chinese character conversion
• [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a2c9bed5a3a4c7e015a4aa63c6309a4&chapterId=8a2c9bed5a3a4c7e015a4aa6800909a5&vId=8a2c9bed5a3a4c7e 015a4aa6b4a609a6&videoId=170FDD1C8418EF049C33DC5901307461)

• Gson
• [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a2c9bed5a3a4c7e015a3ad9a490030d&chapterId=8a2c9bed5a3a4c7e015a3ab4a8fc01ba&vId=8a2c9bed5a3a4c7e015 a3bddf83c0862&videoId=43F77AE0DB66FB6C9C33DC5901307461)

• BridgeWebView android and js intermodulation
• [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a2c9bed5a3a4c7e015a3bbffc6107ed&chapterId=8a2c9bed5a3a4c7e015a3b06a0be0698&vId=8a2c9bed5a3a4c7e015a 3adf255203f2&videoId=C00D92795CD598059C33DC5901307461)

• RxjavaUtils

• [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a2c9bed5a3a4c7e015a3add4703037f&chapterId=8a2c9bed5a3a4c7e015a3add6c480380&vId=8a2c9bed5a3a4c7e015a 3adda8f30381&videoId=0208419D0BB20CAB9C33DC5901307461)

• Zxing

• Logger

Part 5 image loading

* [Picasso](https://github.com/open-android/Picasso)
* [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a2c9bed5a3a4c7e015a3bbffc6107ed&chapterId=8a2c9bed5a3a4c7e015a3affe39a046a&vId=8a2c9bed5a3a4c7e015a3b 0451f105b8&videoId=B33E67E868CDB1D19C33DC5901307461)

![](http://upload-images.jianshu.io/upload_images/4037105-ece55ae2ca9b3003.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

• Picasso-transformations
• [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a2c9bed5a3a4c7e015a3bbffc6107ed&chapterId=8a2c9bed5a3a4c7e015a3afea6140464&vId=8a2c9bed5a3a4c7e015a3 b0482c10627&videoId=A9996ED78AAC2B7B9C33DC5901307461)

![](http://upload-images.jianshu.io/upload_images/4037105-e317677935993817.gif?imageMogr2/auto-orient/strip)

• Glide
• [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a2c9bed5a3a4c7e015a3bbffc6107ed&chapterId=8a2c9bed5a3a4c7e015a3aff408e0467&vId=8a2c9bed5a3a4c7e015a3 b03c546046b&videoId=068DCD08470172549C33DC5901307461)

![](http://upload-images.jianshu.io/upload_images/4037105-ece55ae2ca9b3003.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

• Universal-Image-Loader
• [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a2c9bed5a3a4c7e015a3bbffc6107ed&chapterId=8a2c9bed5a3a4c7e015a3ad76a12029c&vId=8a2c9bed5a3a4c7e015a 3b0428540549&videoId=1E1712DA85A8B6A99C33DC5901307461)

![](http://upload-images.jianshu.io/upload_images/4037105-84f750f7e494bdf6.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

• Glide-transformations

• [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a2c9bed5a3a4c7e015a3bbffc6107ed&chapterId=8a2c9bed5a3a4c7e015a3b0c9441077a&vId=8a2c9bed5a3a4c7e015 a3b03f3bd04da&videoId=13CAE14707B5911C9C33DC5901307461)

  

#Part 6 Database

• GreenDao

• [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a9bdf305a3a4c00015a5008c0b900b0&chapterId=8a9bdf305a3a4c00015a5008fcca00b1&vId=8a9bdf305a3 a4c00015a500a10a300b2&videoId=5665D92F3A2D1BFA9C33DC5901307461)

• OrmLite

• [Complementing video](https://www.boxuegu.com/web/html/video.html?courseId=172&sectionId=8a9bdf305a3a4c00015a500ad0490141&chapterId=8a9bdf305a3a4c00015a500afc6c0142&vId=8a9bdf305a3a 4c00015a500b24cf0143&videoId=471D4682107323DF9C33DC5901307461)