Problem importing .so lib file into game

Hey there!

Due to some missing opengl calls for vbos I want to use the opengl native wrapper from libgdx.
I have the wrapper class in my project folder and copied the libandroidgles20.so into libs/armeabi

The problem is that I get a UnsatisfiedLinkError at this line:

static {	System.loadLibrary("androidgl20");}

It seems that I need to specifiy that the lib should be built in the project...

Does anyone know how to do this?
Note: I do not have NDK installed, because I think I don´t need it for just using it...

Thanks in advance!