First run of Android Studio. Unable to access Android SDK add-on list

Question

Rather than doing so many steps click on set-proxy click on auto set-proxy and then click on check box and then ok you are done

Turn off your firewall, and check if it works perfectly, then add android.bat to trusted files in your windows firewall and restart firewall.

First of all you must be connected to the internet.

1. Clear any DNS settings that might be present in your network adapter or router.
2. Either turn off the firewall (windows or antivirus's) completely or add an exception.
3. Stop any other application that might be using internet hence slowing it down.
4. Close android studio completely and run SDK Manager to update all the components that are awaiting an update, especially addons.

Then run android studio.

I have the same issue under Ubuntu 14.04.

I setup my proxy in the network config system (it is ok with internet browser).

I setup my proxy with environment variables http_proxy and https_proxy.

As I use 64 bit machine, I also did:

sudo apt-get install libncurses5:i386 libstdc++6:i386 zlib1g:i386

$ javac -version
javac 1.7.0_80