Wavefront obj loader material problem

I use Bill Duney wavefront obj loader. I’m new in opengles and it was really helpful.
I exported a revit file to dwg and then open it with blender/google sketchUp and then to wavefront obj.
Next, add my files to your loader and got strange results.
The project load correctly vertex and normals but does a strange results with materials (I use only material, without textures). The one file is loaded with some materials on different faces the other, doesn’t load materials but after a click makes the model green.
If you have a minute and could help me out, please.
I uploaded the project here.

Thanks for answering,

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