Sorry if I\'m asking this the wrong way (if I am, let me know what I should be doing instead.) The site warned me not to leave this as an answer and I don\'t have enough rep
As others have noted there is a couple other answers which may solve your problem. However they did not work for me but I did manage to find a work around for my particular issue which may help someone.
I believe my issue was with the proxy server at work. While you can configure the proxy in the SDK manager you can't enter the credentials for it to save.
My workaround was to tether my work laptop to my phone WiFi hotspot when I started up Eclipse so it could bypass the work proxy, then use the normal work network after that.