Specifically, my error was:
requires ‘org.eclipse.wst.sse.core 0.0.0′ but it could not be found
The solution is pretty simple: additional Eclipse add-ons are needed before the ADT Plug-in can install, but Eclipse doesn’t know where to find them. To fix this, go back to the “Available Software” wizard (Help->Install New Software…) and add the Eclipse repository for your specific release. Since I had Indigo installed, I used the URL http://download.eclipse.org/releases/indigo/.
After the Eclipse repository was added, I changed “Work With” to “—All Available Sites—“ and proceeded with my ADT install. The wizard was able to find and install the dependencies and install ADT with no problem.
Resources:
- http://developer.android.com/sdk/installing.html
- http://code.google.com/intl/es/eclipse/docs/faq.html#wstinstallerror