Facebook建立了一个叫做增强交通控制的东西。GitHub页面上的简要总结:

Augmented Traffic Control (ATC) is a tool to simulate network conditions. It allows controlling the connection that a device has to the internet. Developers can use ATC to test their application across varying network conditions, easily emulating high speed, mobile, and even severely impaired networks. Aspects of the connection that can be controlled include: bandwidth latency packet loss corrupted packets packets ordering In order to be able to shape the network traffic, ATC must be running on a device that routes the traffic and sees the real IP address of the device, like your network gateway for instance. This also allows any devices that route through ATC to be able to shape their traffic. Traffic can be shaped/unshaped using a web interface allowing any devices with a web browser to use ATC without the need for a client application.

你可以在GitHub上找到它:https://github.com/facebook/augmented-traffic-control

他们还为此写了一篇博客:https://code.facebook.com/posts/1561127100804165/augmented-traffic-control-a-tool-to-simulate-network-conditions/

你可以使用模拟器。看看这个页面:Android模拟器。请注意下面两个论点:

-netdelay <delay> Set network latency emulation to . Default value is none. See the table in Network Delay Emulation for supported values. -netspeed <speed> Set network speed emulation to . Default value is full. See the table in Network Speed Emulation for supported values. Speeds for reference in increasing kbps: UP DOWN -------- ---------- gsm GSM/CSD 14.4 14.4 hscsd HSCSD 14.4 57.6 gprs GPRS 28.8 57.6 umts UMTS/3G 384.0 384.0 edge EDGE/EGPRS 473.6 473.6 hsdpa HSDPA 5760.0 13,980.0 lte LTE 58,000.0 173,000.0 evdo EVDO 75,000.0 280,000.0 full No limit ∞ ∞

或者在一个实际的设备上，你可以去设置->移动网络->首选的网络类型，并选择可用的最慢的… 当然，这是非常有限的，但对于某些测试目的，这可能足够了。

运行>运行配置，选择Android应用程序，然后进入目标选项卡。按照图中所示进行更改。

正如@VicVu Charles(或任何其他代理工具)所建议的那样，是一种更简单的方法。但我想补充的是，你也可以在你的设备上做到这一点，而不仅仅是genymotion或其他模拟器。过程是一样的:

修改您的设备/模拟器的wifi设置以使用手动代理。然后设置代理主机名和端口 A.将主机名设置为您系统的IP(使用ifconfig/ifconfig获取您pc/mac的IP) B.设置genymotion端口号(查看charles中的proxy Settings)

PS:你的设备/模拟器必须使用相同的wifi，因为你正在使用的ip很可能是私有ip。

这听起来可能有点疯狂，但微波炉是作为微波屏蔽的。因此，把你的设备放在微波炉里(当你的设备在里面的时候不要打开微波炉!)会导致你的信号强度显著下降。这绝对比站在电梯里强……