Android SDK Manager cannot update

Android SDK Manager failed to update the solution

1. Open the SDK Manager and stop updating the connection;
Looking for tools->options above the interface opens the SDK manager's settings,

2. Select "Force https://... sources to be fetched using http://..." To enforce the use of the HTTPS protocol.

3, WINDOWS open/etc/hosts file in C:\WINDOWS\system32\drivers\etc, add the following two address:

203.208.46.146 dl.google.com203.208.46.146 dl-ssl.google.com

Modify the Hosts file
Windows system:
C:\WINDOWS\system32\drivers\etc\hosts

Mac Ox:
/etc/hosts

Android SDK Manager cannot update