1. Photo album, cropped library TakePhoto
https://github.com/crazycodeboy/TakePhoto
2 A few lines of code to quickly integrate the QR code scanning function
https://github.com/yipianfengye/android-zxingLibrary
3. Imitation ios mobile button
https://github.com/kyleduo/SwitchButton
https://github.com/zcweng/ToggleButton
4. Customize Android crash interface: CustomActivityOnCrash
https://github.com/Ereza/CustomActivityOnCrash
5. Library for creating Android drawer layout: MaterialDrawer
https://github.com/mikepenz/MaterialDrawer
6.android photoview image zoom function ImageView
https://github.com/chrisbanes/PhotoView
7. ios-like dialog
https://github.com/saiwu-bigkoo/Android-AlertView
8.glide-transformations - Android class library that provides image transformation for Glide
https://github.com/wasabeef/glide-transformations
9.GlidePalette A library that can easily use Palette when Glide is loaded.
https://github.com/florent37/GlidePalette
10. Flow layout
https://github.com/hongyangAndroid/FlowLayout
11. The code tool class that Android developers have to collect
https://github.com/huangkunkun/AndroidUtilCode
12.logger Common log tool
https://github.com/orhanobut/logger
13. Alternative use library for joda-time date
https://github.com/JodaOrg/joda-time
14. Fragmentation fragment alternative library plus imitation edge return
https://github.com/YoKeyword/Fragmentation
15.FlycoTabLayout imitates TabLayout, with indicator
https://github.com/H07000223/FlycoTabLayout
16.BaseRecyclerViewAdapterHelper Powerful adapter for recyclerview
https://github.com/CymChad/BaseRecyclerViewAdapterHelper
17. The bottom layer of the festival player is the open source player of
Bilibili https://github.com/lipangit/JieCaoVideoPlayer
18. The selector
imitates ios
https://github.com/saiwu-bigkoo/Android-PickerView
flat style
https://github.com/gzu-liyujiang/AndroidPicker
19. Network framework
NoHttp
https://github.com/yanzhenjie/NoHttp
okgo
https://github.com/jeasonlzy/okhttp-OkGo