大约有 1,200 项符合查询结果(耗时:0.0133秒) [XML]

https://www.tsingfun.com/it/ai2/2694.html 

app inventor拍照的照片如何保存到手机相册? - App Inventor 2 中文网 - ...

...存到手机相册?问:你好!小朋友在做APP时,调用照相机模块拍的照片要存到相册里,指定了图像位址,但还是实现不了,是什么原因呀?首先,这个照相机拍照完成事件中这个参数是图片的路径,是只读 问:你好!小朋友在...
https://bbs.tsingfun.com/thread-2312-1-1.html 

ble蓝牙的标识符怎么确定的 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

...回答,仅参考------------------------------您好!关于蓝牙发送模块中的 ServiceUUID,这是一个非常关键的概念,尤其是在使用 BLE(低功耗蓝牙)时。下面我来为您详细解释一下:什么是 ServiceUUID?ServiceUUID 是蓝牙服务的唯一标识符(UU...
https://bbs.tsingfun.com/thread-2366-1-1.html 

低功耗蓝牙接收串口16数据 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

低功耗蓝牙模块用串口助手发送16进制数据,手机接收数据一直在跳变(没电脑没发数据也在跳变)。接收到的是10进制的数据通过调用AsciiConversion1模块转化和提取转化都不行。波特率设置为9600,这个很重要!! 经过测试,...
https://bbs.tsingfun.com/thread-2973-1-1.html 

App Inventor接入Supabase:开源免费的后端新选择 - App Inventor 2 拓展 -...

...tor扩展组件,你可以使用Supabase的以下核心功能: 功能模块说明Auth认证邮箱注册、手机验证、匿名登录、OAuth第三方登录PostgreSQL数据库强大的关系型数据操作,支持复杂查询Realtime订阅数据库变化实时通知App文件存储云端文件...
https://bbs.tsingfun.com/thread-3120-1-1.html 

App如何处理硬件上报的高频数据? - 创客硬件开发 - 清泛IT社区,为创新赋能!

用户提问: 手机APP端订阅并接受下位机蓝牙模块上传的指令或数据,有时候可能会拥堵,就是在同一个时间节点连续收到很多条下面发来的消息或数据, 例如下位机会随机报错上传各个模块的硬件故障信息,很可能会同一时...
https://stackoverflow.com/ques... 

What's the bad magic number error?

... Take the pyc file to a windows machine. Use any Hex editor to open this pyc file. I used freeware 'HexEdit'. Now read hex value of first two bytes. In my case, these were 03 f3. Open calc and convert its display mode to Programmer (Scientific in XP) to see Hex and Decimal...
https://stackoverflow.com/ques... 

What does value & 0xff do in Java?

... What does the x mean in that notation? x isn't a number or a hex number? – Callat Dec 5 '16 at 18:56 3 ...
https://stackoverflow.com/ques... 

How to hash a string into 8 digits?

...# Use hashlib >>> import hashlib >>> int(hashlib.sha1(s).hexdigest(), 16) % (10 ** 8) 58097614L >>> # Use hash() >>> abs(hash(s)) % (10 ** 8) 82148974 share | i...
https://stackoverflow.com/ques... 

PHP: How to generate a random, unique, alphanumeric string for use in a secret link?

... Do note that md5 returns hexadecimal values, meaning the character set is limited to [0-9] and [a-f]. – Thijs Riezebeek May 15 '15 at 16:59 ...
https://stackoverflow.com/ques... 

Scatterplot with too many points

...is is (and probably more appropriate for the number of points you have) is hexagonal binning: ggplot(df,aes(x=x,y=y)) + stat_binhex() And there is also regular old rectangular binning (image omitted), which is more like your traditional heatmap: ggplot(df,aes(x=x,y=y)) + geom_bin2d() ...