用户发送的是 8n1 的格式，但是ai2的串口貌似不支持这种格式。写串口正常，读串口为空，len为0。 目前经过测试验证，应该是 \n 作为结束符的。发送时，也是。 ai2使用 physicaloid 库完成的串口功能。

我使用的是demo程序进行测试，拓展程序链接： https://www.fun123.cn/reference/extensions/NotificationStyle.html 结果无论点什么按键都会报错： edu.mit.appinventor.aicompanion3: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be...

各位大佬好 我刚开始学习 APP INVENTOR编程。 尝试写了一个与MQTT服务器通讯的小程序。 这个小程序在手机当前程序状态运行正常 手机切换到别的应用 也运行正常。 但是 当手机屏幕熄灭 ， 刚熄灭的时候 还能正常接收MQTT的信...

由于assets路径在AI伴侣和apk中不一样，且现在安卓权限收紧，试过了好几种路径都不能正常加载 assets 中的 html文件。Google到直接使用这个地址就可以了，完美！http://localhost/<NAME OF YOUR ASSETS HTML FILE>.html 测试aia见附件，可以...

...个子系统账号尚未完美统一，这个后续不断迭代解决这些问题的。下一步的计划是申诉并一步步解决App的上架问题（由于腾讯平台的各种原因，有一定的障碍，但是我们会坚定推进并一步步解决遇到的问题）。 // 全新VI元素 ...

用户反馈：打开，手机横屏/竖屏切换，按钮有时候会闪烁下，有时候会没有文字。

...一名学生，升级VIP会员后，可以随时随地在线编程，遇到问题提问都能及时得到详细解答，我的App开发技能得到了极大的提升！另外，我享受到VIP学生价格优惠，非常划算！ ...

...g is to use a memory barrier, which indicates both to the compiler and the CPU that no memory access may be reordered across this point. Placing such barriers around our volatile variable access ensures that even non-volatile accesses won't be reordered across the volatile one, allowing us to write ...

...f thread pools and Fork/Join are alike: Both want to utilize the available CPU power the best they can for maximum throughput. Maximum throughput means that as many tasks as possible should be completed in a long period of time. What is needed to do that? (For the following we will assume that there...

...... obviously non-float are smaller than strings and floats, and thus more CPU friendly in assembly. String to string comparison in all languages is slower than something that can be compared in 1 instruction by the CPU. Even comparing 8 byte (64bit) on a 32bit CPU is still faster than a VARCHAR(2)...