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Android emulator-5554 offline
...esn't work, go to emulated device and enable developer options > enable usb debugging
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Is it possible to install APK file if more than one emulators/devices are connected [duplicate]
...ore information about each device like this: c1cd3890098c08f0 device usb:337641472X product:rubenswifixx model:SM_T360 device:rubenswifi transport_id:5 0123456789ABCDEF device usb:336592896X product:HR935 model:HR935 device:HR935 transport_id:3
– Joshua Pinter
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Capturing mobile phone traffic on Wireshark
... all interfaces
For Android 4.0+ phones: Android PCAP from Kismet uses the USB OTG interface to support packet capture without requiring root. I haven't tried this app, and there are some restrictions on the type of devices supported (see their page)
For Android phones: tPacketCapture uses the Andro...
Why do we need C Unions?
... inheritance.
E.g.
Connection
/ | \
Network USB VirtualConnection
If you want the Connection "class" to be either one of the above, you could write something like:
struct Connection
{
int type;
union
{
struct Network network;
struct U...
How can I get the external SD card path for Android 4.0+?
...mp; (file.listFiles().length > 0) ) { // it is a real directory (not a USB drive)...
Log.d(TAG, "External Storage: " + file.getAbsolutePath() + "\n");
}
}
}
}
Alternatively, you might use System.getenv("EXTERNAL_STORAGE") to retrieve the primary External...
What happens to an open file handle on Linux if the pointed file gets moved or deleted
... directory.
If on the other hand the underlying device disappears (e.g. USB unplug) then the file handle won't be valid any more and is likely to give IO/error on any operation. You still have to close it though. This is going to be true even if the device is plugged back in, as it's not sensible...
【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
...包括：低功耗，使用纽扣电池就可以运行数月至数年。快连接，毫秒级的连接速度，传统蓝牙甚至长达数分钟。远距离，长达数百米的通信距离，而传统蓝牙通常10米左右。
蓝牙联盟沿用经典蓝牙的规范内容，为低功耗蓝牙定...
App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
...ssage Queuing Telemetry Transport：消息队列遥测传输）
客户端连接参数
连接信息
身份标识
认证信息
连接控制
连接到服务器
连接建立和终止方法
连接状态
连接状态变更事件
建立连...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...逻辑的实现，为了做到这些，网络框架帮助应用程序管理连接，管理输入输出缓冲区，处理具体的发包收包等细节和错误的处理，处理流控，并且允许应用层注入封包，解包，新建连接时处理，断开连接时处理，收到包后处理包...
App Inventor 2 低功耗蓝牙 BlueToothLE 拓展 · App Inventor 2 中文网
...
扫描
详细接入步骤：
开始扫描 -> 获取BLE设备列表 -> 连接指定设备（也可指定MAC地址连接）-> 设备指定服务uuid和特征uuid 发送 / 接收 数据。
广播
现在常规便宜芯片并无蓝牙协议栈，只能通过人工拼包用最简单的蓝牙广...