就我而言，我只需要从“Android SDK和AVD管理器”中启动Android虚拟设备(AVD)，它就可以工作了

我没有使用代理……然而，我正在使用一个脚本…在这附近。我在公司的防火墙后面

I think some of the answers may have addressed this, however obliquely, but here's what worked for me. Assuming your problem is occurring when you're on a wireless network and you have a LAN card installed, the issue is that the emulator tries to obtain its DNS settings from that LAN card. Not a problem when you're connected via that LAN, but utterly useless if you're on a wireless connection. I noticed this when I was on my laptop. So, how to fix? Simple: Disable your LAN card. Really. Just go to your Network connections, find your LAN card, right click it and choose disable. Now try your emulator. If you're like me, it suddenly ... works!

环境:Windows 7 64位

在我的例子中，我必须在verbose模式下运行模拟器(emulator -verbose -avd Nexus_6_API_25)来找出模拟器检测到两个DNS服务器的事实，如下所示。

模拟器:找到2个DNS服务器:192.168.3.227 192.168.1.1

在检测到的两个DNS服务器中，只有一个有互联网连接，这是模拟器无法上网的原因。

为了成功连接android模拟器到互联网，没有互联网连接的DNS服务器必须从控制面板\网络和互联网\网络连接中禁用

如果您在SDK管理器的工具->选项下是代理，则不要配置代理设置。 当你从命令行运行时，添加-http-proxy:

emulator.exe -avd YOUR_AVD_NAME_HERE -http-proxy PROXY:PORT

为我工作。

您尝试过使用管理权限启动模拟器吗?它适用于我，我运行的是Windows 7 64bit)