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Service and Characteristic are not published by the connected device -...
Service and Characteristic are not published by the connected device，报错如下：
问题原因：硬件/蓝牙芯片问题导致的，比如A硬件测试好的，换了B硬件没有修改uuid，就出现这个报错。
由于B硬件没有发布这些特征，就会报这个错误。
Android - Dynamically Add Views into View
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Use the LayoutInflater to create a view based on your layout template, and then inject it into the view where you need it.
LayoutInflater vi = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = vi.inflate(R.layout.your_layout, null);
// fill in...
Convert NSData to String?
...ivateKey puts the pointer to the output buffer p at the end of the buffer and waiting for further input, and buf is still pointing to the beginning of your buffer.
The following code works for me where pkey is a pointer to an EVP_PKEY:
unsigned char *buf, *pp;
int len = i2d_PrivateKey(pkey, NULL)...
Is it possible to use a div as content for Twitter's Popover
... a <div> inside the popover. Potentially, I would like to use php and mysql in there, but if i could get a div to work i think i can figure out the rest. I tried setting data-content to a div ID, but it didnt work.
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How to request a random row in SQL?
How can I request a random row (or as close to truly random as is possible) in pure SQL?
28 Answers
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How can I determine the current line number in JavaScript?
...nism for determining the line number of the currently executing statement (and if so, what is it)?
8 Answers
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How can I remove or replace SVG content?
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Thanks, however if i remove a chart and then immediately try to add a new chart, it does not get added? Any suggestion, thank you.
– codingbbq
Feb 25 '15 at 10:24
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What purpose does a tag serve inside of a tag?
...e been on a "view source" spree lately on websites with interesting design and content. One of those websites, Squarespace , has blocks of <script> tags inside of a <noscript> tag, like so:
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Can I make a user-specific gitignore file?
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For user-specific and repo-specific file ignoring you should populate the following file: $GIT_DIR/info/exclude
Usually $GIT_DIR stands for: your_repo_path/.git/
shar...
How to test if parameters exist in rails
I'm using an IF statement in Ruby on Rails to try and test if request parameters are set. Regardless of whether or not both parameters are set, the first part of the following if block gets triggered. How can I make this part ONLY get triggered if both params[:one] and params[:two] is set?
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