I'm new to game development andengine. I want to add ParallaxBackground but I don't know how to change background on player move. I'm using arrow for moving a player. Now my question is where I write the code parallaxBackground.setParallaxValue(5); I was written this line in onAreaTouched method of arrow but it not work. please help me. Thanks.

Code

private Camera mCamera;
private static  int CAMERA_WIDTH = 800;
private static  int CAMERA_HEIGHT = 480;

private BitmapTextureAtlas bgTexture;
private ITextureRegion bgTextureRegion;

@Override
protected void onCreateResources() {
    
    BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/");
    bgTexture = new BitmapTextureAtlas(getTextureManager(),2160,480,TextureOptions.REPEATING_BILINEAR);
    bgTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(bgTexture, this, "background.png", 0, 0);
    bgTexture.load(); 
}
@Override
protected Scene onCreateScene() {

    this.getEngine().registerUpdateHandler(new FPSLogger());
    
    Scene scene = new Scene();
    scene.setBackground(new Background(Color.BLACK));
        
    final ParallaxBackground parallaxBackground = new ParallaxBackground(0, 0, 0);
    final VertexBufferObjectManager vertexBufferObjectManager = this.getVertexBufferObjectManager();
    
    parallaxBackground.attachParallaxEntity(new ParallaxEntity(0.0f, new Sprite(0, CAMERA_HEIGHT - this.bgTextureRegion.getHeight(), this.bgTextureRegion, vertexBufferObjectManager)));
    scene.setBackground(parallaxBackground);

Robot robot = new Robot();
    
    // add Player
    final AnimatedSprite animatedRobotSprite = new AnimatedSprite(robot.centerX, robot.centerY, 122, 126, (ITiledTextureRegion) robotTextureRegion, getVertexBufferObjectManager());
    scene.attachChild(animatedRobotSprite);
    animatedRobotSprite.animate(new long[]{1250,50,50});

            
    // add right arrow button
    Sprite rightArrowSprite = new Sprite(0, CAMERA_HEIGHT-70, rightArrowTextureRegion, getVertexBufferObjectManager()){
        
        @Override
        public boolean onAreaTouched(TouchEvent pSceneTouchEvent,float pTouchAreaLocalX, float pTouchAreaLocalY) {
            
            switch (pSceneTouchEvent.getAction()) {
            
            case TouchEvent.ACTION_DOWN:
                moveRight = true;
                parallaxBackground.setParallaxValue(5);
                break;
            
            case TouchEvent.ACTION_MOVE:
                moveRight = true;
                break;
            
            case TouchEvent.ACTION_UP:
                moveRight = false;
                break;

            default:
                break;
            }
            return super.onAreaTouched(pSceneTouchEvent, pTouchAreaLocalX, pTouchAreaLocalY);
        }
    };
    scene.attachChild(rightArrowSprite);
    
    scene.registerTouchArea(rightArrowSprite);
    
    scene.setTouchAreaBindingOnActionDownEnabled(true);
    
    scene.setTouchAreaBindingOnActionMoveEnabled(true);

    scene.registerUpdateHandler(new IUpdateHandler() {
        
        @Override
        public void reset() {
            
        }
        
        @Override
        public void onUpdate(float pSecondsElapsed) {
                    
            if ( moveRight ){
                animatedRobotSprite.setPosition(animatedRobotSprite.getX()+speedX, animatedRobotSprite.getY());
                                    
                
            }
        }
    });
            
    return scene;
}