very low Quality need help

[dubbox]

Hey guys i am loading a serialized object and the quality is very very low
it a model of a building which im using to move inside but you cannot recognize anything i dont know if its a problem in lighting or in rendering you cant even see a difference between the sidewalls and the floor cause its both grey
im jusing a sun and an ambient ligth and GLSurfaceView.Renderer

please help i dont know what i am missing here to make it look realistic the model is created in blender and there it looks awesome even not rendered just in the object view

[dubbox]

another question

the old question still needs an answer but i want to ask you guys something else
i know that you can paint with blit things like strings textures but how can i integrate real buttons in my app like in a gui do i just make an image like a button and wait for the image to be clicked or is there another option?

[EgonOlsen]

Does the model have textures? Or at least some different diffuse colors for the different parts? It might be worth a try to place a light source at the camera's position and move it accordingly. It's most likely either an export problem from Blender or just bad choosen lighting.
About the GUI: Yes, that's basically the way to go. You can create a simple GUI framework based on this approach in almost no time.