i have install android studio 2.2.2 on my Desktop and it works well with new created project but the problem when i open a project created in an older or newer version of 2.2.2 i got error message unknown host 'service.gradle.org' as attached image please click here
i tried to set up gradle home path for downloaded project but doesn't fix the problem
also i tried this solution but it doesn't work too
File > Settings > Appearance & Behavior > System Settings > HTTP Proxy [Under IDE Settings] Enable following option Auto-detect proxy settings
please any help or suggestions