Installing Eclipse 4 Plugin
The Tutorial shows you Simply & Visually How to Getting-Started Installing New Plugins on the Latest Eclipse 2023-12 R IDE.
The contents give Focus only to the Essential Instructions and Commands so to make the Tut easier to understand ;)

Help >> Install New Software
Click on Add Software Repository
Set Repository URL
Select Packages/Plugins to Install
Reviews Items to Install
Possibly Accept the License
Add Android Integration to Eclipse Platform:
How to Install ADT Eclipse Plugin