Hello! I'm new one to this forum, and I also have problem with loading obj models...
Here is some info: I'm using Eclipse and Android SDK 2.1
I'm following this tutorial: http://www.jpct.net/wiki/index.php/Loading_3ds_Models_from_Blender - only changed loading function from 3ds into OBJ(as far I understood from doc's, I don't need mtl, so left it null),
I put my model, a example file from http://people.sc.fsu.edu/~jburkardt/data/obj/obj.html in 'assets' folder

Tried to test it on emulator but crashing like hell  and looks like it's OutOfMemory problem, but how if I only load simple cube file? 

Here is code and log:
source:

package com.threed.jpct.example;

import java.io.*;
import java.lang.reflect.Field;

import javax.microedition.khronos.egl.EGL10;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.egl.EGLDisplay;
import javax.microedition.khronos.opengles.GL10;

import android.app.Activity;
import android.content.res.AssetManager;
import android.content.res.Resources;
import android.opengl.GLSurfaceView;
import android.os.Bundle;
import android.view.MotionEvent;


import com.threed.jpct.*;
import com.threed.jpct.util.BitmapHelper;
import com.threed.jpct.util.MemoryHelper;
/**
* A simple demo. This shows more how to use jPCT-AE than it shows how to write
* a proper application for Android.
* It includes basic activity management to handle pause and resume...
*
* @author EgonOlsen
*
*/
public class HelloWorld extends Activity {
    private String thingName = "temp";
    private int thingScale = 1;//end
private static HelloWorld master = null;

private GLSurfaceView mGLView;
private MyRenderer renderer = null;
private FrameBuffer buffer = null;

private World world = null;
private RGBColor back = new RGBColor(50, 50, 100);

private float touchTurn = 0;
private float touchTurnUp = 0;

private float xpos = -1;
private float ypos = -1;

private Object3D thing = null;
private int fps = 0;

private Light sun = null;
private Camera cam = null;

AssetManager assMan;
InputStream is;
protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
mGLView = new GLSurfaceView(getApplication());
renderer = new MyRenderer();
mGLView.setRenderer(renderer);
setContentView(mGLView);
}

@Override
protected void onPause() {
super.onPause();
mGLView.onPause();
}

@Override
protected void onResume() {
super.onResume();
mGLView.onResume();
}

protected void onStop() {
super.onStop();
}

public boolean onTouchEvent(MotionEvent me) {

if (me.getAction() == MotionEvent.ACTION_DOWN) {
xpos = me.getX();
ypos = me.getY();
return true;
}

if (me.getAction() == MotionEvent.ACTION_UP) {
xpos = -1;
ypos = -1;
touchTurn = 0;
touchTurnUp = 0;
return true;
}

if (me.getAction() == MotionEvent.ACTION_MOVE) {
float xd = me.getX() - xpos;
float yd = me.getY() - ypos;

xpos = me.getX();
ypos = me.getY();

touchTurn = xd / -100f;
touchTurnUp = yd / -100f;
return true;
}

try {
Thread.sleep(15);
} catch (Exception e) {
// No need for this...
}

return super.onTouchEvent(me);
}

protected boolean isFullscreenOpaque() {
return true;
}

class MyRenderer implements GLSurfaceView.Renderer {

private long time = System.currentTimeMillis();
private boolean stop = false;

public MyRenderer() {
}

public void stop() {
stop = true;
}

public void onSurfaceChanged(GL10 gl, int w, int h) {
if (buffer != null) {
buffer.dispose();
}
buffer = new FrameBuffer(gl, w, h);

if (master == null) {

world = new World();
        world.setAmbientLight(150, 150, 150);

sun = new Light(world);
sun.setIntensity(250, 250, 250);

thing = loadModel("assets/model.obj", thingScale);
        thing.build();

world.addObject(thing);

cam = world.getCamera();
cam.moveCamera(Camera.CAMERA_MOVEOUT, 50);
cam.lookAt(thing.getTransformedCenter());

SimpleVector sv = new SimpleVector();
sv.set(thing.getTransformedCenter());
sv.y -= 100;
sv.z -= 100;
sun.setPosition(sv);
//MemoryHelper.compact();

if (master == null) {
Logger.log("Saving master Activity!");
master = HelloWorld.this;
}
}
}

public void onSurfaceCreated(GL10 gl, EGLConfig config) {
}

public void onDrawFrame(GL10 gl) {

try {
if (!stop) {
if (touchTurn != 0) {
thing.rotateY(touchTurn);
touchTurn = 0;
}

if (touchTurnUp != 0) {
thing.rotateX(touchTurnUp);
touchTurnUp = 0;
}

buffer.clear(back);
world.renderScene(buffer);
world.draw(buffer);
buffer.display();

if (System.currentTimeMillis() - time >= 1000) {
Logger.log(fps + "fps");
fps = 0;
time = System.currentTimeMillis();
}
fps++;
} else {
if (buffer != null) {
buffer.dispose();
buffer = null;
}
}
} catch (Exception e) {
Logger.log(e, Logger.MESSAGE);
}
}

    private Object3D loadModel(String filename, float scale) {
assMan = getResources().getAssets();
is = new InputStream() {
@Override
public int read() throws IOException {
return 0;
}
};
        Object3D[] model = Loader.loadOBJ(is, null, scale);
        Object3D o3d = new Object3D(0);
        Object3D temp = null;
        for (int i = 0; i < model.length; i++) {
            temp = model[i];
            temp.setCenter(SimpleVector.ORIGIN);
            temp.rotateX((float)( -.5*Math.PI));
            temp.rotateMesh();
            temp.setRotationMatrix(new Matrix());
            o3d = Object3D.mergeObjects(o3d, temp);
            o3d.build();
        }
        return o3d;
    }
}
}





log:
07-25 22:33:48.269: WARN/ActivityManager(65): Activity idle timeout for HistoryRecord{44ffd098 com.threed.jpct.example/.HelloWorld}
07-25 22:33:48.549: INFO/dalvikvm-heap(466): Grow heap (frag case) to 13.402MB for 6378722-byte allocation
07-25 22:33:51.678: INFO/dalvikvm-heap(466): Forcing collection of SoftReferences for 9568078-byte allocation
07-25 22:33:51.798: ERROR/dalvikvm-heap(466): Out of memory on a 9568078-byte allocation.
07-25 22:33:51.798: INFO/dalvikvm(466): "GLThread 8" prio=5 tid=7 RUNNABLE
07-25 22:33:51.809: INFO/dalvikvm(466):   | group="main" sCount=0 dsCount=0 s=N obj=0x44e85270 self=0x11f848
07-25 22:33:51.809: INFO/dalvikvm(466):   | sysTid=472 nice=0 sched=0/0 cgrp=default handle=1283576
07-25 22:33:51.809: INFO/dalvikvm(466):   | schedstat=( 10442697916 807643615 403 )
07-25 22:33:51.828: INFO/dalvikvm(466):   at java.lang.AbstractStringBuilder.enlargeBuffer(AbstractStringBuilder.java:~97)
07-25 22:33:51.828: INFO/dalvikvm(466):   at java.lang.AbstractStringBuilder.append0(AbstractStringBuilder.java:157)
07-25 22:33:51.838: INFO/dalvikvm(466):   at java.lang.StringBuffer.append(StringBuffer.java:215)
07-25 22:33:51.838: INFO/dalvikvm(466):   at com.threed.jpct.Loader.loadBinaryFile(Loader.java:1076)
07-25 22:33:51.850: INFO/dalvikvm(466):   at com.threed.jpct.Loader.loadTextFile(Loader.java:71)
07-25 22:33:51.850: INFO/dalvikvm(466):   at com.threed.jpct.Loader.loadOBJ(Loader.java:302)
07-25 22:33:51.850: INFO/dalvikvm(466):   at com.threed.jpct.Loader.loadOBJ(Loader.java:207)
07-25 22:33:51.858: INFO/dalvikvm(466):   at com.threed.jpct.example.HelloWorld$MyRenderer.loadModel(HelloWorld.java:218)
07-25 22:33:51.858: INFO/dalvikvm(466):   at com.threed.jpct.example.HelloWorld$MyRenderer.onSurfaceChanged(HelloWorld.java:148)
07-25 22:33:51.878: INFO/dalvikvm(466):   at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1325)
07-25 22:33:51.878: INFO/dalvikvm(466):   at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1116)
07-25 22:33:51.928: INFO/ActivityManager(65): Displayed activity com.threed.jpct.example/.HelloWorld: 14353 ms (total 418702 ms)
07-25 22:33:51.958: WARN/dalvikvm(466): threadid=7: thread exiting with uncaught exception (group=0x4001d800)
07-25 22:33:52.078: ERROR/AndroidRuntime(466): FATAL EXCEPTION: GLThread 8
07-25 22:33:52.078: ERROR/AndroidRuntime(466): java.lang.OutOfMemoryError
07-25 22:33:52.078: ERROR/AndroidRuntime(466):     at java.lang.AbstractStringBuilder.enlargeBuffer(AbstractStringBuilder.java:97)
07-25 22:33:52.078: ERROR/AndroidRuntime(466):     at java.lang.AbstractStringBuilder.append0(AbstractStringBuilder.java:157)
07-25 22:33:52.078: ERROR/AndroidRuntime(466):     at java.lang.StringBuffer.append(StringBuffer.java:215)
07-25 22:33:52.078: ERROR/AndroidRuntime(466):     at com.threed.jpct.Loader.loadBinaryFile(Loader.java:1076)
07-25 22:33:52.078: ERROR/AndroidRuntime(466):     at com.threed.jpct.Loader.loadTextFile(Loader.java:71)
07-25 22:33:52.078: ERROR/AndroidRuntime(466):     at com.threed.jpct.Loader.loadOBJ(Loader.java:302)
07-25 22:33:52.078: ERROR/AndroidRuntime(466):     at com.threed.jpct.Loader.loadOBJ(Loader.java:207)
07-25 22:33:52.078: ERROR/AndroidRuntime(466):     at com.threed.jpct.example.HelloWorld$MyRenderer.loadModel(HelloWorld.java:218)
07-25 22:33:52.078: ERROR/AndroidRuntime(466):     at com.threed.jpct.example.HelloWorld$MyRenderer.onSurfaceChanged(HelloWorld.java:148)
07-25 22:33:52.078: ERROR/AndroidRuntime(466):     at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1325)
07-25 22:33:52.078: ERROR/AndroidRuntime(466):     at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1116)
07-25 22:33:52.168: WARN/ActivityManager(65):   Force finishing activity com.threed.jpct.example/.HelloWorld


Any advices?
Btw. Sorry for my english...