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App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
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最新版拓展下载：
de.ullisroboterseite.ursai2pahomqtt.aix
MQTT（Message Queuing Telemetry Transport：消息队列遥测传输）
MQTT 发明于 1999 年，为物联网设计的轻量级协议，基于TCP协议实现。
MQTT协议文档：https://mqtt.org/
MQTT服务质...
AppInventor2能实现不跳转相机直接预览拍照吗？ - App应用开发 - 清泛IT社...
...s://github.com/XomaDev/pro-c ... kumaraswamy/camerax
免费提供一个.aix供下载：
KIO4_Gradient 拓展：布局中的颜色渐变 - App Inventor 2 中文网 - 清泛IT...
..._____________________- 渐变的示例。 p187_渐变.aiacom.KIO4_Gradient.aix_____________________________________________
- 设计。_____________________________________________
- 块。___________________________
原版：合成颜色貌似有bug，alpha好像默认是0，设置了100，也...
App Inventor 2 SideBarV2 侧边栏拓展 · App Inventor 2 中文网
...
（详细用法待完善）
拓展下载
.aix 拓展下载：
co.com.dendritas.SidebarV2.zip
您的改进建议 联系方式： 不需要回复的可留空~ 意见反馈（300字以内）： ...
Pro Camera 扩展：专业级自定义相机，提供滤镜、降噪、对焦等高级功能 · A...
...常工作。
下载链接
com.kumaraswamy.camerax.aix
功能概述
扩展特性
使用最新的 Camera API
相机滤镜功能
降噪模式
预览和输出的增强模式
相机对焦锁定和解锁
距离手动对...
How to know what the 'errno' means?
... not thread safe while strerror_r() is thread safe. MT-Safe or Thread-Safe functions are safe to call in the presence of other threads. MT, in MT-Safe, stands for Multi Thread. -p26, The GNU C Library char * strerror(int errnum ) [Function] Preliminary: | MT-Unsafe race:strerror | AS-Unsafe heap i18...
How to change plot background color?
...e ‘T10’ categorical palette (which is the default color cycle);
a “CN” color spec, i.e. 'C' followed by a single digit, which is an index into the default property cycle (matplotlib.rcParams['axes.prop_cycle']); the indexing occurs at artist creation time and defaults to black if the cycle...
Find all files in a directory with extension .txt in Python
...f in os.listdir(path) if f.endswith('.txt')]
>>> text_files
['euc-cn.txt', 'euc-jp.txt', 'euc-kr.txt', 'euc-tw.txt', ... 'windows-950.txt']
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What are the advantages of using nullptr?
...ere doesn't seem to be an advantage. But consider the following overloaded functions:
void f(char const *ptr);
void f(int v);
f(NULL); //which function will be called?
Which function will be called? Of course, the intention here is to call f(char const *), but in reality f(int) will be called! ...
Is there a method that works like start fragment for result?
...{
private lateinit var sharedViewModel: SharedViewModel
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
activity?.run {
sharedViewModel = ViewModelProviders.of(activity).get(SharedViewModel::class.java)
}
}
...