Android SDK requires android developer toolkit version 17.0.0 or above

Question

I am having this weird issue when I was trying to merge my projects from eclipse to netbeans. Now when trying to rerun eclipse I get this error

\"Android

Answer 1

Had the same problem. Tried to update through Help > Check for Updates, but was getting an alert message like this:

Contacting software sites has encountered a problem

And after that the update process failed. Googled and found the solution.

You just need to add one line in eclipse.ini, which is located in Eclipse folder. Add this line to the end of the file:

-Djava.net.preferIPv4Stack=true

And after that the update process went normally.

The problem lies in the fact that the upload process goes through IPv6, but the internet service provider supports IPv4.

Source (russian)