The Android sample uses the Teapot.java file to define the features of an object to render in OpenGL. You can see how the rendering is done in ImageTargetRenderer.java's renderFrame() function. In order to render something different, you will need to read out the vertex coordinates from you model file (.obj/.fbx) and feed them into a vertex array in OpenGL. You can find some more information on this here: https://library.vuforia.com/articles/Solution/Working-with-Vuforia-and-OpenGL-ES#How-To-Render-Static-3D-Models-using-OpenGL-ES
Hello achyut505,
The Android sample uses the Teapot.java file to define the features of an object to render in OpenGL. You can see how the rendering is done in ImageTargetRenderer.java's renderFrame() function. In order to render something different, you will need to read out the vertex coordinates from you model file (.obj/.fbx) and feed them into a vertex array in OpenGL. You can find some more information on this here: https://library.vuforia.com/articles/Solution/Working-with-Vuforia-and-OpenGL-ES#How-To-Render-Static-3D-Models-using-OpenGL-ES
Thanks,
-Vuforia Support