This library is based on the Http protocol and encapsulates the OkHttp network request framework. It is easier to use than Retrofit, supports RxJava, RxJava2, supports custom caching, and supports batch breakpoint download management and batch upload management functions. Completely imitating WeChat's image selection library, it comes with rectangular image cropping and circular image cropping functions, which can be downloaded and used if necessary. Similar to Qzone, WeChat Moments, Weibo homepage, etc., the Jiugongge control that displays pictures automatically determines the size of the picture and the size of the control according to the number of pictures, uses the Adapter mode to set the picture, provides external interface callbacks, and uses the interface to load pictures, supporting arbitrary Image loading frameworks such as: Glide, ImageLoader, xUtils3, Picasso, etc., support click on the image to preview the large image in full screen.