it appears there might be a few reasons why there might be no internet connection for an emulator, in my case i was working from home where i have a wireless connection then came into the office and plugged in direct, however although my wireless connection was disconnected it was not disabled resulting in no emulator connection. my understanding is that when it starts up it looks for a network adapter and if there is any conflict here it might result in no internet connection. to resolve go to Start > Settings > Network Connections right click on Wireless Network Connection (if you are not using wireless) and select disable

我认为有时候重启虚拟设备就足够了。: -)

我在Win7 64位上遇到了类似的问题。尝试禁用我的hamachi和virtualbox适配器，但没有工作。尝试以管理员身份启动avd，但没有工作。最后，我使用这个网站上的信息禁用了teredo隧道适配器，它工作了: http://www.mydigitallife.info/2007/09/09/how-to-disable-tcpipv6-teredo-tunneling-in-vista/

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!

在eclipse中转到DDMS

在DDMS下选择模拟器控制，其中包含电话状态 在电话状态包含数据——>选择Home，这将启用您的互联网连接，如果您想禁用模拟器的互联网连接，那么——>选择None

(注意:只有当运行eclipse的PC/笔记本电脑有活跃的internet连接时，才会启用internet连接。)

在Android模拟器中，打开飞机模式，然后再关闭，对我来说很管用。