问题
I follow this steps for setting External dependencies:
https://github.com/libgdx/libgdx/wiki/Dependency-management-with-Gradle
(section: External Dependencies Examples >> universal-tween-engine using maven)
After do that, i check maven repo direcory and the files are there:
C:\Users\Admin.m2\repository\aurelienribon\tweenengine\6.3.3

Executing gradlew bat for rebuilding the project returns no errors:

I'm missing something because in Eclipse didn't see the references to Tween engine:

And obviously, if i try to add a reference to Tween Engine on my code i get an error:

How can i set up a new reference on existing gradle project, using libGDX for using Tween Engine in this case?
回答1:
You did everything correct, but just adding the dependencies will not refresh the dependencies in eclipse.
You have to mark all related projects in eclipse, right click them and perform a Gradle -> Refresh Dependencies
. Depending on what exactly you have changed, you might even need to do a Gradle -> Refresh All
.
This will update the dependencies in eclipse and you will find the needed classes.
来源:https://stackoverflow.com/questions/23314348/update-gradle-references-to-include-maven-local-jars-libgdx-tween-engine