Prior to update the SDK has been unsuccessful, has been timeout, the network from 1m to fiber, and then Baidu, basically let the change hosts file, but that IP address has no effect, was the pit miserable. This problem is related to the source, the following ping out of the IP to be effective.
Under Linux:
Open Terminal
Ping dl-ssl.google.com
You can see that the connection is very slow
Change Address
Ping dl.google.com
See the IP address is: 203.208.48.129 (this address will change, please use the actual ping to prevail)
Execute sudo gedit/etc/hosts below
Open the Hosts file
Add the following line: 203.208.48.129 dl-ssl.google.com
Save to take effect. Open the Android SDK again to see how it works. My speed from the original 50k changed to 5000k ...
Under Windows:
Run-cmd and Ping
Windows hosts in the C\WINDOWS\SYSTEM32\DERIVERS\ETC directory
Also at the end add 203.208.48.130 (this is I ping out under Windows) dl-ssl.google.com
Update Android SDK timeout failed