更改recyclerview滑動速度

   

    
    public static void setScrollSpeed(RecyclerView rv, int velocity){
        try{
            Field field = recyclerView.getClass().getDeclaredField("mMaxFlingVelocity");
            field.setAccessible(true);
            field.set(recyclerView, velocity);
        }catch (Exception e){
            e.printStackTrace();
        }
    }