I have MYGallery class extended by Gallery. onSwipe onFling method is not getting called what need to do.

code is as below

public MyGallery(PhotoAlbumDetailActivity context) {
        super(context);
        this.context = context;
        this.setFadingEdgeLength(0);
        //this.setSpacing(10);
    }

public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
  System.out.println("On Fling");
}

in my main activity this.mConverseGallery = new ConverseGallery(this);