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APP inventer 2 出现Runtime Error：No virtual method isDeniedPermission...
ble蓝牙App编译成apk后运行报错：
问题原因：
用的广州服务器，版本太老（约5年前的版本）导致的，不但apk运行会报错，AI伴侣大概率也会。建议使用中文网（https://www.fun123.cn）平台，和MIT同步更新的。
参考：https://com...
按键可见性的延时设置 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
大家好，咨询请教一个问题， APP上面的 按键 当按下一个按键 设置2号按键可见性为假 （这个功能可以实现），但 在设定时间内，比如一个小时，或者更长时间后， 让原先的2号按键的可见性从原来的假 恢复成真
用“计时...
大佬们，串口输出的文本字符怎么不能比较，也不能转换数字类型？ - App应用...
...建一个demo，就测试一下文本和数字的转换，应该是没有问题的。保险一点，一开始定义一个全局变量赋初始值（文本or数字），就能定下来它的初始类型。
BLE 接收BLE模块发来的信息 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...... ml#RegisterForBytes
请先自行研究一下，如果遇到具体的问题，请再继续跟帖提问，谢谢。
请问输入文件要往哪放? - App应用开发 - 清泛IT社区，为创新赋能！
...看文件）理论上，读写方法都是这样写路径，如果运行有问题，请贴出具体的报错截图。
2、更强大的文件管理功能，可以使用FileTools拓展：https://www.fun123.cn/reference/components/storage.html#FileTools
3、如果仅仅是为了App退出保存一些...
Invalid argument supplied for foreach()
... This is the only thing that worked for me. For some reason, PHP didn't believe that the multidimensional array I built was actually an array of arrays.
– Justin
Jul 29 '15 at 20:21
...
PHP parse/syntax errors; and how to solve them
...
What are the syntax errors?
PHP belongs to the C-style and imperative programming languages. It has rigid grammar rules, which it cannot recover from when encountering misplaced symbols or identifiers. It can't guess your coding intentions.
Most impo...
When and why I should use session_regenerate_id()?
Why and when should I use the session_regenerate_id() function in php?
Should I always use it after I use the session_start() ?
I've read that I have to use it to prevent session fixation, is this the only reason?
...
What's the best way to get the last element of an array without deleting it?
...nce. In this answer I will share my findings with you, benchmarked against PHP versions 5.6.38, 7.2.10 and 7.3.0RC1 (expected Dec 13 2018).
The options (<<option code>>s) I will test are:
option .1. $x = array_values(array_slice($array, -1))[0]; (as suggested by rolacja)
option .2. $x...
How to show google.com in an iframe?
...ilar to Google style. Google CSE works with web and images search.
google.php
<script>
(function() {
var cx = 'xxxxxxxxxxxxxxxxxxxxxx';
var gcse = document.createElement('script');
gcse.type = 'text/javascript';
gcse.async = true;
gcse.src = 'https://cse.google.com/cse....