Eclipse Cannot Install Android ADT plugin

If Eclipse shows error like this when installing  Android ADT plugin

Software being installed: Android Development Tools 11.0.0.v201105251008-128486 (com.android.ide.eclipse.adt.feature.group 11.0.0.v201105251008-128486) Missing requirement: Android Development Tools 11.0.0.v201105251008-128486 (com.android.ide.eclipse.adt.feature.group 11.0.0.v201105251008-128486) requires 'org.eclipse.wst.sse.core 0.0.0' but it could not be found


It can be resolved like this

1.Goto Help->Install New Software.

2.Click On "Available Software Sites".

3.Click ADD and add location (if the eclipse version is galileo )
      "http://download.eclipse.org/releases/galileo "

5.Now try to install Android ADT plugin it will work .