Load a 3D android model and add it to the given position

ViroARHelloWorldActivity_createDroidAtPosition.java

/**
 * Load a 3D android model and add it to the given position
 */
private void createDroidAtPosition(Vector position){
        // Create a droid on the surface
        final Bitmap bot = ViroHelper.getBitmapFromAsset(this, "andy.png");
        final Object3D object3D = new Object3D();
        object3D.setPosition(position);
        mScene.getRootNode().addChildNode(object3D);

        // Load the Android model asynchronously.
        object3D.loadModel(Uri.parse("file:///android_asset/andy.obj"), Object3D.Type.OBJ, new AsyncObject3DListener() {
            @Override
            public void onObject3DLoaded(final Object3D object, final Object3D.Type type) {
                // When the model is loaded, set the texture associated with this OBJ.
                Texture objectTexture = new Texture(bot, Texture.Format.RGBA8, false, false);
                Material material = new Material();
                material.setDiffuseTexture(objectTexture);
                object3D.getGeometry().setMaterials(Arrays.asList(material));
            }

            @Override
            public void onObject3DFailed(String s) {
            }
        });

        // Make the object draggable.
        object3D.setDragListener(new DragListener() {
            @Override
            public void onDrag(int i, Node node, Vector vector, Vector vector1) {
                // No-op.
            }
        });
        object3D.setDragType(Node.DragType.FIXED_DISTANCE);
    }