Failed to fetch URL http://dl-ssl.google.com/android/repository/repository.xml,

Failed to fetch URL https://dl-ssl.google.com/android/repository/addons_list-2.xml, reason: Connection to https://dl-ssl.google.com refused
  
Failed to fetch URL http://dl-ssl.google.com/android/repository/repository.xml, reason:
  
  
  
Reprinted, I hope to help everyone, and thank you for the friends who provided this solution.
Solve the difficulty of accessing Google servers in China:
1. Start Android SDK Manager;
2. Open the main interface, select "Tools", "Options..." in turn, and the "Android SDK Manager - Settings" window will pop up;
3. In the "Android SDK Manager - Settings" window, fill in mirrors.neusoft.edu.cn and 80 in the "HTTP Proxy Server" and "HTTP Proxy Port" input boxes, and select "Force https://… sources to be fetched using http://…” check box; 4. Click the “Close” button after the setting is completed to close the “Android SDK Manager – Settings” window and return to the main interface;
5. Select "Packages", "Reload" in turn.