大约有 39,000 项符合查询结果(耗时:0.0270秒) [XML]

https://bbs.tsingfun.com/thread-1828-1-1.html 

Error 507: unable to connect. is the device turned on? 无法连接,设备...

...能是蓝牙设备问题未开机之类的,也可能是连接相关的代写的不对,用的错误的地址连接等。 一般来说多是使用 hc05 经典蓝牙连接出现的问题,配对后没通电开机,会报这个错误。配对后硬件发生变更比如配对修改了等...
https://bbs.tsingfun.com/thread-2024-1-1.html 

AppInventor有没有扫二维的功能? - App应用开发 - 清泛IT社区,为创新赋能!

AppInventor 条扫描器可以实现二维功能。 不过得注意:将使用外部扫仪 设置为 “假”,否则会因没有外部扫描仪设备而报错。设置假后,就是直接利用设备的摄像头进行条的识别,内部采用ZXing(Java库)进行条...
https://bbs.tsingfun.com/thread-2159-1-1.html 

BLE 蓝牙APP 接收不到来自蓝牙模块的讯息 - App应用开发 - 清泛IT社区,为创新赋能!

...是否成功发送。 如需更具体的问题解决服务,请右侧扫联系在线客服。
https://bbs.tsingfun.com/thread-2225-1-1.html 

输入-选中项索引值-查看下拉框中的选中项内容 - App Inventor 2 中文网 - ...

...于显示输入的索引值对应的选择项内容,网上查看了下编过程,但文字叙述还是一头雾水没理解,恳求一这段过程的代截图,,,,,,,
https://bbs.tsingfun.com/thread-2303-1-1.html 

安全工具将程序标记为病毒 - App应用开发 - 清泛IT社区,为创新赋能!

...备案或国外软件,安全扫描标记为病毒,是因为没有备案?问deepseek,说不应该是备案,程序采用注册机制,用数据库验证注册名和注册,别的都是纯粹计算。详见这个帖子:https://bbs.tsingfun.com/thread-2138-1-1.html 要上架应用...
https://bbs.tsingfun.com/thread-2508-1-1.html 

微信小程序:运行环境加载失败(2,101) - 用户反馈 - 清泛IT社区,为创新赋能!

...。将其打开,时间立即校正为正确的北京时间。 再次扫进入体验版小程序,一切正常了。 猜测加载体验版/测试版小程序可能是使用https请求,于是会验证时间戳,导致运行环境加载失败。 以上是可能的原因,仅供参考。
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What are .dex files in Android?

...ograms are compiled into .dex (Dalvik Executable) files, which are in turn zipped into a single .apk file on the device. .dex files can be created by automatically translating compiled applications written in the Java programming language. Dex file format: 1. File Header 2. String Table 3. Clas...
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Python: how to print range a-z?

...m' To do the urls, you could use something like this [i + j for i, j in zip(list_of_urls, string.ascii_lowercase[:14])] share | improve this answer | follow ...
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How to build Qt for Visual Studio 2010

...s 4.8.6 for Windows (Visual Studio 2008, 218 MB)", but by clicking on the "zip" link above it. On that link, you get a big zip file like "qt-everywhere-opensource-src-4.8.6.zip". Unzip this into a folder and make its path something nice and small, for example "E:\Qt" Visual Studio Command Prompt...
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knitr Markdown highlighting in Emacs?

... to a recent (therefore supported) version of Emacs. Extract the polymode.zip in a directory where you keep Emacs material, e.g.: ~\conf\emacs and change the resulting polymode-master dir to polymode Add this in your init file (and if you used different names above, change names below accordi...