Make DocumentsUI of Android 11 compile in Android Studio（使DocumentsUI能在Android Studio上单编运行）

整合了零售行业常用移动便携式打印机demo（打印机主流的指令类型ESC命令集+CPCL命令集+TSPL命令集）合集以及商米台式收银机打印demo

1. 项目采用 Kotlin 语言编写，结合 Jetpack 相关控件，`Navigation`，`Lifecyle`，`DataBinding`，`LiveData`，`ViewModel`等搭建的 **MVVM** 架构模式； 2. 通过**组件化**，**模块化**拆分，实现项目更好解耦和复用，[ARouter](https://github.com/alibaba/ARouter) …

HenCoder Plus 三期的课上代码分享

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High-performance, scalable time-series database designed for Industrial IoT (IIoT) scenarios

Flutter makes it easy and fast to build beautiful apps for mobile and beyond

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A Java API for generating .java source files.