ADT requires 'org.eclipse.wst.sse.core 0.0.0' but it could not be found

Question

I've just encountered exactly the same problem in Eclipse 3.6 (Helios). After plenty of Googling I came across this link:

http://code.google.com/intl/es/eclipse/docs/faq.html#wstinstallerror

During installation, there's an error about requiring org.eclipse.wst.sse.ui. How do I fix that?

The Google Plugin for Eclipse depends on other specific Eclipse components, such as WST. Your installation of Eclipse may not yet include all of them, but they can be easily installed by following these instructions. Eclipse 3.6 (Helios)

1. Select Help > Install New Software...
2. Click the link for Available Software Sites.
3. Ensure there is an update site named Helios. If this is not present, click Add... and enter http://download.eclipse.org/releases/helios for the Location.
4. Now go through the installation steps; Eclipse should download and install the plugin's dependencies.

(There are examples in that page for 3.5 (Galileo), 3.4 (Ganymede) & 3.3 (Europa) for anyone with different versions)

The exact same steps work for 3.7 (Indigo) as well.

Just use http://download.eclipse.org/releases/indigo for the location.

Juno: http://download.eclipse.org/releases/juno

Kepler: http://download.eclipse.org/releases/kepler

Note: Step four is not necessary. Only steps one to three are necessary.

For Eclipse 3.7 or Indigo the winning URL is

http://download.eclipse.org/releases/indigo

And for 3.8 it is

http://download.eclipse.org/releases/juno

I encountered the same problem in eclipse 3.7 indigo

and I have done the folowing:

1. help->install new software

2. click on "available software sites"

3. select all entries (CTRL-A) and remove them

4. add new entry at location http://download.eclipse.org/releases/indigo/

5. now add again the ADT location http://dl-ssl.google.com/android/eclipse/

If you're downloaded and installed a Classic version of eclipse you are missing the essential Java Development Tools required by the Android SDK etc

I found that installing the Eclipse Java Development Tools & Java EE Tools solved this problem for me in Eclipse 3.7.

It seems obvious to many Java Developers but to those new to the IDE and JAVA etc it's important to note that they don't installed come with the "classic" version of Eclipse.

Adding the link to the Helios repo http://download.eclipse.org/releases/helios wasn't enough.

In windows 7

Run the eclipse as administrator

goto Windows->Preferences->Instal/update->check "all version of available softwares" and apply--> ok

goto Help->Install new software-> add-->put the URL add or ADT zip file -->ok

thats all and its working....

I was also browsing these answers,but I couldn't get any answer to my problem.But through hit and trial I found the following solution. First of all update your eclipse by going on Help-> Check for updates .Then, go to Install New Software and give adt location(local or url),then do check Contact all update sited during install to find required software and it would do the rest.

I am not sure whether this solution works well for other,but it worked for me and hope it works for some troubled developer out there