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App Inventor 2 经典蓝牙(SPP) 硬件接入:hc05 · App Inventor 2 中文网

... 显示已配对的SPP经典蓝牙列表: 选择一个蓝牙设备进行连接: 断开当前连接的设备: 错误处理: 常见问题解决 Error 515: Not connected to a Bluetooth device. ...
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Open new Terminal Tab from command line (Mac OS X)

Is it possible to open a new tab in Mac OS X's terminal from the command line in a currently opened tab? 13 Answers ...
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When I catch an exception, how do I get the type, file, and line number?

... import sys, os try: raise NotImplementedError("No error") except Exception as e: exc_type, exc_obj, exc_tb = sys.exc_info() fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1] print(exc_type, fname, exc_tb.tb_li...
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How to list active / open connections in Oracle?

... substr(b.username,1,10) username, -- b.server, substr(b.osuser,1,8) os_user, substr(b.program,1,30) program from v$session b, v$process a where b.paddr = a.addr and type='USER' order by spid; shar...
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Can't find the 'libpq-fe.h header when trying to install pg gem

I am using the Ruby on Rails 3.1 pre version. I like to use PostgreSQL, but the problem is installing the pg gem. It gives me the following error: ...
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Location Services not working in iOS 8

My app that worked fine on iOS 7 doesn't work with the iOS 8 SDK. 26 Answers 26 ...
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What is `mt=8` in iTunes links for the App Store?

...values): 1 Music 2 Podcasts 3 Audiobooks 4 TV Shows 5 Music Videos 6 Movies 7 iPod Games 8 Mobile Software Applications 9 Ringtones 10 iTunes U 11 E-Books 12 Desktop Apps So, to answer your question, the "mt=8" in iTunes links simply identifies it as being of type 'Mobile Sof...
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How to programmatically take a screenshot on Android?

... // image naming and path to include sd card appending name you choose for file String mPath = Environment.getExternalStorageDirectory().toString() + "/" + now + ".jpg"; // create bitmap screen capture View v1 = getWindow().getDecorView().getRootView(); v1.se...
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What's the difference between deadlock and livelock?

...atedly triggered. This can be avoided by ensuring that only one process (chosen randomly or by priority) takes action. share | improve this answer | follow | ...
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How do I fix the Visual Studio compile error, “mismatch between processor architecture”?

...introduced with the new Visual Studio 11 Beta and .NET 4.5, although I suppose it might have been possible before. First, it really is just a warning. It should not hurt anything if you are just dealing with x86 dependencies. Microsoft is just trying to warn you when you state that your project is ...