When installing ADT in eclipse in Ubuntu, you may encounter a solution that lacks org. eclipse. wst. sse. core 0.0.0.

Today, the following error occurs when you configure the ADT with eclipse in Ubuntu to configure the Android development environment:
 
1 Cannot complete the install because one or more required items cocould not be found.
 
2 Software being installed: Android Development Tools 8.0.1.v201012062107-82219 (com. android. ide. eclipse. adt. feature. group 8.0.1.v201012062107-82219)
 
3 Missing requirement: Android Development Tools 8.0.1.v201012062107-82219 (com. android. ide. eclipse. adt. feature. group 8.0.1.v201012062107-82219) requires 'org. eclipse. gef 0.0.0 'but it cocould not be found
 
After network query, the downloaded eclipse plug-in is incomplete, resulting in the lack of org. eclipse. wst. sse. core
 
The solution is as follows:
1. In Help-> Install New Software-> "Available Software Sites", find the main update source of your eclipse version, as shown below:
 
1 Indigo-http://download.eclipse.org/releases/indigo
 
My eclipse is 3.7, and the corresponding development code is Indigo. Check the box above and click OK.
 
If it is not 3.7, or there is no corresponding version in the list, for example, Helios 3.6 (Galileo 3.5, Ganymede 3.4, and Europa 3.3 ), click Add in the Help-> Install New Software window, and enter Helios and Location in the Name column.
 
1 http://download.eclipse.org/releases/helios
 
Change indigo to helios. Click OK.
 
After the update, select "Web, XML, Java EE and OSGi Enterprise Development" at the end of the list and click Next to install and update.
 
Then you can install ADT as described in the tutorial.
 
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