黑莓编程区别滚轮和轨迹球

     protected boolean trackwheelRoll(int amount,int status,int time)
    {
        //todo
        return super.trackwheelRoll(amount,status,time);
    }

   protected boolean navigationMovement(int dx,int dy,int status,int time)
    {
        if(status == KeypadListener.STATUS_FOUR_WAY) //轨迹球
        {
            if(dx 〉 0)
            {
                //向右滚动
            }
            else if(dx 〈 0)
            {
                //向左滚动
            }
            else if(dy 〉 0)
            {
                //向下滚动
            }
            else if(dy 〈  0)
            {
                //向上滚动
            }
        }
        else if(status ==  KeypadListener.STATUS_TRACKWHEEL)//滚轮
        {
            if(dy 〉 0)
            {
                //向下滚动
            }
            else if(dy 〈 0 )
            {
                //向上滚动
            }
        }
        return super.navigationMovement(dx,dy,status,time);
    }