Android - ObjLoader from Android Gaming Book error

Android - ObjLoader from Android Gaming Book error

I apologize for asking such a question, but I am lost and cannot figure
out what to do. I am reading the book Beginning Android Games 2nd Edition.
I actually finished reading the book just today. I planned on making my
own small 3D Game, just to test my knowledge. Well, my issue is that the
ObjLoader that we made for the framework in the book won't show my .obj
file. It either just crashes, shows some triangles, or fills have the
screen a grayish color. I have tried making these .obj files in AutoDesk
Maya 2013, Wings 3D, and Blender. But none of them show my object I
designed. Even just a simple cube. Again, I'm sorry for asking such a
question, but I would like to know if there is something special I need to
do during exporting to get this ObjLoader to load it? I know for a fact
that I am doing the loading correct. It works for the .obj provided. Here
is the ObjLoader's code(straight from the book). Thanks in advance.
package com.badlogic.androidgames.framework.gl;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import com.badlogic.androidgames.framework.impl.GLGame;
public class ObjLoader {
public static Vertices3 load(GLGame game, String file) {
InputStream in = null;
try {
in = game.getFileIO().readAsset(file);
List<String> lines = readLines(in);
float[] vertices = new float[lines.size() * 3];
float[] normals = new float[lines.size() * 3];
float[] uv = new float[lines.size() * 2];
int numVertices = 0;
int numNormals = 0;
int numUV = 0;
int numFaces = 0;
int[] facesVerts = new int[lines.size() * 3];
int[] facesNormals = new int[lines.size() * 3];
int[] facesUV = new int[lines.size() * 3];
int vertexIndex = 0;
int normalIndex = 0;
int uvIndex = 0;
int faceIndex = 0;
for (int i = 0; i < lines.size(); i++) {
String line = lines.get(i);
if (line.startsWith("v ")) {
String[] tokens = line.split("[ ]+");
vertices[vertexIndex] = Float.parseFloat(tokens[1]);
vertices[vertexIndex + 1] = Float.parseFloat(tokens[2]);
vertices[vertexIndex + 2] = Float.parseFloat(tokens[3]);
vertexIndex += 3;
numVertices++;
continue;
}
if (line.startsWith("vn ")) {
String[] tokens = line.split("[ ]+");
normals[normalIndex] = Float.parseFloat(tokens[1]);
normals[normalIndex + 1] = Float.parseFloat(tokens[2]);
normals[normalIndex + 2] = Float.parseFloat(tokens[3]);
normalIndex += 3;
numNormals++;
continue;
}
if (line.startsWith("vt")) {
String[] tokens = line.split("[ ]+");
uv[uvIndex] = Float.parseFloat(tokens[1]);
uv[uvIndex + 1] = Float.parseFloat(tokens[2]);
uvIndex += 2;
numUV++;
continue;
}
if (line.startsWith("f ")) {
String[] tokens = line.split("[ ]+");
String[] parts = tokens[1].split("/");
facesVerts[faceIndex] = getIndex(parts[0], numVertices);
if (parts.length > 2)
facesNormals[faceIndex] = getIndex(parts[2],
numNormals);
if (parts.length > 1)
facesUV[faceIndex] = getIndex(parts[1], numUV);
faceIndex++;
parts = tokens[2].split("/");
facesVerts[faceIndex] = getIndex(parts[0], numVertices);
if (parts.length > 2)
facesNormals[faceIndex] = getIndex(parts[2],
numNormals);
if (parts.length > 1)
facesUV[faceIndex] = getIndex(parts[1], numUV);
faceIndex++;
parts = tokens[3].split("/");
facesVerts[faceIndex] = getIndex(parts[0], numVertices);
if (parts.length > 2)
facesNormals[faceIndex] = getIndex(parts[2],
numNormals);
if (parts.length > 1)
facesUV[faceIndex] = getIndex(parts[1], numUV);
faceIndex++;
numFaces++;
continue;
}
}
float[] verts = new float[(numFaces * 3)
* (3 + (numNormals > 0 ? 3 : 0) +
(numUV > 0 ? 2 : 0))];
for (int i = 0, vi = 0; i < numFaces * 3; i++) {
int vertexIdx = facesVerts[i] * 3;
verts[vi++] = vertices[vertexIdx];
verts[vi++] = vertices[vertexIdx + 1];
verts[vi++] = vertices[vertexIdx + 2];
if (numUV > 0) {
int uvIdx = facesUV[i] * 2;
verts[vi++] = uv[uvIdx];
verts[vi++] = 1 - uv[uvIdx + 1];
}
if (numNormals > 0) {
int normalIdx = facesNormals[i] * 3;
verts[vi++] = normals[normalIdx];
verts[vi++] = normals[normalIdx + 1];
verts[vi++] = normals[normalIdx + 2];
}
}
Vertices3 model = new Vertices3(game.getGLGraphics(), numFaces
* 3,
0, false, numUV > 0, numNormals > 0);
model.setVertices(verts, 0, verts.length);
return model;
} catch (Exception ex) {
throw new RuntimeException("couldn't load '" + file + "'", ex);
} finally {
if (in != null)
try {
in.close();
} catch (Exception ex) {
}
}
}
static int getIndex(String index, int size) {
int idx = Integer.parseInt(index);
if (idx < 0)
return size + idx;
else
return idx - 1;
}
static List<String> readLines(InputStream in) throws IOException {
List<String> lines = new ArrayList<String>();
BufferedReader reader = new BufferedReader(new
InputStreamReader(in));
String line = null;
while ((line = reader.readLine()) != null)
lines.add(line);
return lines;
}
}