An error occurred while updating the android SDK manager.

I recently found that the SDK cannot be updated when I updated the SDK with the android SDK manager.
I found the relevant information and found the cause was blocked by GFW .....
Update failure prompt:

Failed to fetch URL https://dl-ssl.google.com/android/repository/addons_list-1.xml, reason: No route to host

Solution:
Open the hosts file in c: \ windows \ system32 \ drivers \ etc
Add the 74.125.237.1 dl-ssl.google.com to the last line
The problem is solved successfully ....

The Chinese firewall, which cannot afford to be hurt, is often unable to open webpages, and Google has crashed, so it has to go over the wall. It cannot go to technical forums in the world, and technology lags behind and communication is not allowed, when will it catch up ........., china's economy has developed so fast in recent years because of reform and opening up. Therefore, GFW should also be relaxed. Although there are some disadvantages, the open trend cannot be blocked, and the advantage is greater than the disadvantage. Just like the lockdown of countries in those years, although the aggression and Stability of the sea had been reduced to a certain extent, they could not change the pace of the world and brought about a greater disaster.
This article is from the "Netsky" blog, please be sure to keep this source http://netsky1990.blog.51cto.com/2220666/987405