现在,我想检查一下android设备是否可以通过网络连接到另一台设备。我可以使用浏览器登录互联网。但是当我使用adb shell
连接到android模拟器并使用ping
命令连接到主机时,它会失败。
kaiwii@ubuntu:~$ adb shell ping 192.168.145.136 PING 192.168.145.136 (192.168.145.136) 56(84) bytes of data. ^C
(192.168.145.136是主持人的IP!)
但是当我ping 127.0.0.1时,它可以工作。所以,我肯定肯定设备支持ping命令。我只是困惑为什么它无法ping主机,而我可以在浏览器中登录互联网。更何况,任何人都可以展示任何其他方法来检查android中的网络能力?
由于
答案 0 :(得分:2)
您使用手机的数据连接连接到互联网,而不是通过主机连接到USB。因此,您的设备与主机之间没有网络连接。此外,由于您的主机没有公共IP地址(它位于多级NAT后面,IP中至少有一个级别可见),因此设备无法通过公共互联网ping您的主机。
关于检查网络连接,您可以尝试以下操作:
ping www.google.com
输出:
/ $ ping -c1 www.google.com
PING www.google.com (74.125.236.51) 56(84) bytes of data.
64 bytes from www.google.com (74.125.236.51): icmp_seq=1 ttl=55 time=40.8 ms
64 bytes from www.google.com (74.125.236.51): icmp_seq=2 ttl=55 time=47.1 ms
--- www.google.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 40.850/43.999/47.148/3.149 ms
busybox ifconfig -a
输出(略微剪掉):
eth0 Link encap:Ethernet HWaddr 5C:4C:A9:FC:B0:C0
inet addr:192.168.2.3 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::5e4c:a9ff:fefc:b0c0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:359 errors:0 dropped:0 overruns:0 frame:0
TX packets:275 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:87543 (85.4 KiB) TX bytes:48382 (47.2 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:620 errors:0 dropped:0 overruns:0 frame:0
TX packets:620 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:74037 (72.3 KiB) TX bytes:74037 (72.3 KiB)
rmnet0 Link encap:Ethernet HWaddr 9E:43:B5:97:81:B1
inet addr:106.197.224.94 Bcast:106.197.224.95 Mask:255.255.255.252
BROADCAST MULTICAST MTU:2000 Metric:1
RX packets:54337 errors:0 dropped:0 overruns:0 frame:0
TX packets:59160 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:32720935 (31.2 MiB) TX bytes:8334589 (7.9 MiB)
<snipped value="rmnet1,rmnet2" />
sit0 Link encap:IPv6-in-IPv4
NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
<snipped value="tunl0,usb0" />
答案 1 :(得分:1)
adb shell ping -c1 www.google.com
如果设备有互联网,将返回以下响应
PING www.google.com (xx.xx.xx.xx) 56(84) bytes of data.
64 bytes from (xx.xx.xx.xx): icmp_seq=1 ttl=61 time=25.3 ms
--- www.google.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 25.332/25.332/25.332/0.000 ms
或者
ping: unknown host www.google.com