自考 04735 数据库系统原理 2018版 各章节思维导图 个人整理，供各位考友学习复习使用，其他自考资源会陆续上传
2022-05-25 14:34:31
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unity 2018.4.36f1 最新版 unity3D，亲测可用的unity3D安装程序，注意hub也需要。
2022-05-24 14:05:27
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`id` '行政区划ID',
`ad_code` '行政区划代码',
`area_code` '区号',
`name` '名称',
`pid` '父级ID',
`gmt_create` '创建时间',
`gmt_modified` '更新时间'
2022-05-24 11:01:28
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介绍
NUAA 2018 数据库课程实验，一个基于B/S架构的教务系统，作者 NUAA 161520311
该项目分为前后端两部分，你看到的这部分为前端，即页面部分，此外，该项目还提供了基于Electron的桌面版应用。项目用到的技术栈为nodejs + react+ antd + electron
前端环境配置
在使用之前，你需要安装nodejs，如果未安装，请自行前往官网下载
使用npm安装包管理工具yarn：
npm install -g yarn
使用yarn安装项目依赖：
yarn install
如果中途出现了错误，十有八九是electron无法下载的原因，遇到这种情况你需要为electron和npm设置代理，请自行寻找办法解决
安装完依赖之后，你可以使用：
yarn start
开启前端调试服务器
此时你可以直接访问：
http://localhost:3000/
来查看页面
2022-05-23 17:48:42
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For many people, smartphones have become an extension of themselves. Now running on over
2 billion monthly-active devices, Android is the most common smartphone operating system in use
world-wide, with users installing an average of 50 apps each, resulting in over 94 billion apps downloaded
from the Play app store in 2017 alone.
Ubiquitous and indispensable, smartphones are so advanced and personal that studies have shown
people become anxious if they misplace their device, lose connectivity, or run low on battery.
In the 10 years since launching in 2008, Android has expanded beyond mobile phones to become a
development platform for a wide range of hardware, with 24,000 devices from over 1,300 brands,
including everything from tablets to televisions, watches, cars, and Internet of Things (IoT) devices.
Over the same period, there have been 28 platform and SDK releases.
These innovations, combined with the size of the ecosystem, provide unparalleled opportunities for
developers to create innovative new applications for a global audience of users.
Android offers an open platform for mobile application development. Without artificial barriers, Android
developers are free to write apps that take full advantage of an incredible range of devices. Using Google
Play for distribution, developers can distribute free and paid applications to compatible Android devices
globally.
This book is a hands-on guide to building Android applications for all Android devices. It’s written
based on version 8.1 of the Android SDK, using Android Studio 3.1. Chapter by chapter, it takes
you through a series of sample projects, each introducing new features and techniques to get the
most out of Android. It covers all the basic functionality to get started, as well as the information
for experienced mobile developers to take full advantage of the features of Android, to enhance
existing products or create innovative new ones.
The Android team releases a new major platform every year, a new version of Android Studio
every few months, and incremental changes to Jetpack, such as the support library and Android
Architecture Components, many times each year. With such rapid release cycles, there are regular
changes, additions, and improvements to the tools, platform APIs, and development libraries you’ll
use—and which are described in this book. To minimize the impact of these changes, the Android
engineering team works hard to ensure backward compatibility.
However, future releases will date some of the information provided in this book, and not all active
Android devices will be running the latest platform release. To mitigate this, wherever possible, we
have used backward-compatible support libraries, and included details on which platform releases
support the functionality described—and which alternatives may exist to provide support for users
of devices running earlier platforms.
Further, the explanations and examples included will give you the grounding and knowledge needed
to write compelling mobile applications using the current SDK, along with the flexibility to quickly
adapt to future enhancements.
2022-05-23 17:36:00
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