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通信连接组件 · App Inventor 2 中文网
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为 Android 应用启动另一个 App Inventor。 首先通过下载源代码并使用文件资源管理器或解压缩utility，找到一个名为“youngandroidproject/project.properties”的文件，找出另一个程序的的类。
文件的第一行将开始使用“main=”...
Check for internet connection availability in Swift
...eachable && !needsConnection)
}
}
This works for both 3G and WiFi connections. I've also uploaded it to my GitHub with a working example.
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Can Android do peer-to-peer ad-hoc networking?
Is it possible to set up Android in ad-hoc peer-to-peer wifi mode? For example, I would like to have one phone broadcast a message, and have all peers in the network receive the broadcast, without having a server. I would like to use wifi since bluetooth range is more limited.
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Location Manager Error : (KCLErrorDomain error 0)
...ur location
Press OK
Besides that, even if you are not connected to wifi, you can set a location in simulator through top menu items Debug>Location and to make it permanent follow steps above
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Easiest way to detect Internet connection on iOS?
...m to see an example on how to determine host reachability, reachability by WiFi, by WWAN etc. For a very simply check of network reachability, you can do something like this
Reachability *networkReachability = [Reachability reachabilityForInternetConnection];
NetworkStatus networkStatus = [netw...
一分钟读懂低功耗蓝牙(BLE) MTU交换数据包 - 创客硬件开发 - 清泛IT社区，...
...Z全面的数据及数据解析）
下载链接：
http://www.viewtool.com/index.php/22-2016-07-29-02-11-32/205-hollong-4-0-4-1-ble
4. MTU 请求（REQEUST）
完整数据（以下关注蓝色标注部分）
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How to get IP address of the device from code?
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If you are on a local network (e.g. Wifi or emulator), you will get a private IP address. You can get the proxy IP address through a request to a specific website which gives you the proxy address, e.g. whatismyip.akamai.com
– Julien Krone...
Live-stream video from one android phone to another over WiFi
...eo streaming feature from an android phone to another android phone over a WiFi connection but I can't seem to find anything useful. I looked on android developers for sample code, stackoverflow, google, android blogs but nothing. All I can find are some sort of phone-to-desktop or desktop-to-phone ...
How can I programmatically get the MAC address of an iphone
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}
}
Adapter names vary depending on the simulator/device as well as wifi or cell on the device.
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Android微信智能心跳方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...支持GCM的设备上，采用和微信类似的长连接+心跳策略，WIFI和手机网络下的心跳间隔都为4分45秒，心跳5次后，主动断开连接再重连。
在支持GCM的设备上，主要靠GCM来激活WhatsApp，WhatsApp启动后，会建立一个与服务器的长连接，直...