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nFC Connect低功耗蓝牙APP工具的使用 - 创客硬件开发 - 清泛IT社区，为创新赋能！
nRF Connect是一款由NORDIC开发的专门用于低功耗蓝牙测试APP，仅支持安卓平台。这款APP可以扫描和探索低功耗蓝牙设备，并与它们进行通信。它支持许多蓝牙 SIG 采用的配置文件，以及Nordic Semiconductor或Google的Eddystone的设备固件更新...
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...
What is the difference between ng-app and data-ng-app?
...t AngularJS and am confused about what the differences are between the ng-app and data-ng-app directives.
7 Answers
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XMLHttpRequest cannot load file. Cross origin requests are only supported for HTTP
...n your machine.
Here are some options that I use.
Test your web page locally on Firefox, then deploy to your host.
or: Run a local server
Test on Firefox, Deploy to Host
Firefox currently allows Cross Origin Requests from files served from your hard drive
Your web hosting site will allow requ...
Determine what attributes were changed in Rails after_save callback?
I'm setting up an after_save callback in my model observer to send a notification only if the model's published attribute was changed from false to true. Since methods such as changed? are only useful before the model is saved, the way I'm currently (and unsuccessfully) trying to do so is as fol...
How can I find and run the keytool
...2\bin and next 2) keytool -list -v -keystore "C:\AndroidProjects\Project1\app\myapp.keystore"
– Andrew Grow
May 4 '18 at 9:59
2
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create a trusted self-signed SSL cert for localhost (for use with Express/Node)
...dejs/Express. None of them work properly because while the cert gets installed, it is not trusted. here's what I've tried that fails:
...
Write applications in C or C++ for Android? [closed]
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Normally, you have to:
Install Google Android NDK. It
contains libs, headers, makfile
examples and gcc toolchain
Build an executable from your C code
for ARM, optimize and link it with
provided libs if required
Connect to a pho...
dynamically add and remove view to viewpager
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After figuring out which ViewPager methods are called by ViewPager and which are for other purposes, I came up with a solution. I present it here since I see a lot of people have struggled with this and I didn't see any other relevant answers.
First, here's my adapter; ...
Why shouldn't I use “Hungarian Notation”?
...me with its kind (using Joel's example: safe string or unsafe string), so called Apps Hungarian has its uses and is still valuable.
share
edited Sep 26 '08 at 19:56
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