By virtual device do you mean an extra virtual network device? Assuming you're using the ARM emulator, this can be done by passing extra options to qemu.
I'm going to also assume (1) you are running Linux (Mac I believe is okay, too) as I do not know how to do this on Windows; and (2) you have tunctl (on Ubuntu, this can be installed with sudo apt-get install uml-utilities). You can create a TUN/TAP device with: sudo tunctl -u <username> -t tap0 You can install the TUN/TAP device on the emulator with: emulator -qemu -net nic -net user -net nic -net tap,ifname=tap0,script=no,downscript=no I have found the script=no and downscript=no options to be useful for avoiding errors when the emulator shuts down. You can confirm the TUN/TAP device is running with: adb shell netcfg You should see something like this: lo UP 127.0.0.1/8 0x00000049 00:00:00:00:00:00 eth0 UP 10.0.2.15/24 0x00001043 52:54:00:12:34:56 eth1 DOWN 0.0.0.0/0 0x00001002 52:54:00:12:34:57 tunl0 DOWN 0.0.0.0/0 0x00000080 00:00:00:00:00:00 gre0 DOWN 0.0.0.0/0 0x00000080 00:00:00:00:00:00 Notice the eth1 device; this corresponds to tap0 that you just created. To confirm, on the emulator run: ifconfig eth1 up 10.11.12.2 netmask 255.255.255.0 On the host, open up a new terminal window and run: sudo ifconfig tap0 up 10.11.12.1 netmask 255.255.255.0 sudo tcpdump -n icmp -v -i tap0 Finally, on the emulator run: route add default gw 10.11.12.1 dev eth1 ping -c 5 10.11.12.1 You should get output similar to: 09:58:13.187475 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 10.11.12.2 > 10.11.12.1: ICMP echo request, id 26881, seq 1, length 64 09:58:13.187489 IP (tos 0x0, ttl 64, id 35773, offset 0, flags [none], proto ICMP (1), length 84) 10.11.12.1 > 10.11.12.2: ICMP echo reply, id 26881, seq 1, length 64 09:58:14.190013 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 10.11.12.2 > 10.11.12.1: ICMP echo request, id 26881, seq 2, length 64 09:58:14.190028 IP (tos 0x0, ttl 64, id 35774, offset 0, flags [none], proto ICMP (1), length 84) 10.11.12.1 > 10.11.12.2: ICMP echo reply, id 26881, seq 2, length 64 09:58:15.192087 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 10.11.12.2 > 10.11.12.1: ICMP echo request, id 26881, seq 3, length 64 09:58:15.192103 IP (tos 0x0, ttl 64, id 35775, offset 0, flags [none], proto ICMP (1), length 84) 10.11.12.1 > 10.11.12.2: ICMP echo reply, id 26881, seq 3, length 64 09:58:16.194919 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 10.11.12.2 > 10.11.12.1: ICMP echo request, id 26881, seq 4, length 64 09:58:16.194935 IP (tos 0x0, ttl 64, id 35776, offset 0, flags [none], proto ICMP (1), length 84) 10.11.12.1 > 10.11.12.2: ICMP echo reply, id 26881, seq 4, length 64 09:58:17.196961 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP (1), length 84) 10.11.12.2 > 10.11.12.1: ICMP echo request, id 26881, seq 5, length 64 09:58:17.196977 IP (tos 0x0, ttl 64, id 35777, offset 0, flags [none], proto ICMP (1), length 84) 10.11.12.1 > 10.11.12.2: ICMP echo reply, id 26881, seq 5, length 64 HTH, Eric On Wednesday, 29 August 2012 20:12:48 UTC-4, MW choi wrote: > > Hi All. > > I want to add virtual device on emulator. so I have built SDK on platform > source. > And I am searching about goldfish in googling > But I don't know how to approach it. > > Please help me anyone, anything. > > Thanks, > MW > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en