Good day (alas, not all it is). I will say right away in the development for Android is completely green. The power of my PC does not allow using Android Studio without permanent brakes (this is why I decided to try Eclipse). Immediately to the point and everything in order.
Eclipse installed. Version: 2019-03 (4.11.0). All SDK tools are updated to the latest version via the SDK Manager. Android Support Repositories installed via SDK Manager.
When you create a project, File>New>Other...>Android>Android Application Project produces errors: 
Now regarding the first error, namely finding the name of the Theme.AppCompat.Light style Theme.AppCompat.Light . On the go, I found the solution in the appendix to the project library appcompat . But as always, everything went wrong and the solutions found did not fit my situation, namely the following 2 solutions.
Solution 1: Download Android Support Libraries There should be, as far as I understand, useful libraries including. appcompat . But my SDK Manager doesn’t have this package in Extras. 
Solution 2: Connect the library to the project "manually" To do this, you must first import the library into my Workspace. File>Import...>Android>Existing Android Code Into Workspace> . I found the folder where these libraries are located ... 
BUT! The extensions of the library files are not .jar , but .aar , which is why I have become even more puzzled. 
Now the actual questions I would like to ask are: 1) Do I need to extract .jar from .arr in order to successfully import the library? Why can't I import this .aar library using some tools (if Android Studio somehow works with them)? 2) How is it normal to solve this problem without hand-picking curves? 3) Oh, and here on the offsite installation of these libraries requires access to the Gradle files in the project, alas, I don’t have them. Chyadt?
AndMoreplugin , but I haven’t been interested in its fate for a long time - try it, maybe what happens with it. InAndroid Support Libraries, that in SDK-Manager is also old, and fresh support libraries can be obtained only from Google's Maven repository. - woesss 6:07 pm