RecyclerView滚动到指定位置的一种姿势。

recyclerView.scrollToPosition(position);
recyclerView.smoothScrollToPosition(position);

  /**
     * RecyclerView 移动到当前位置，
     *
     * @param manager  设置RecyclerView对应的manager
     * @param n  要跳转的位置
     */
    public static void MoveToPosition(LinearLayoutManager manager, int n) {
        manager.scrollToPositionWithOffset(n, 0);
        manager.setStackFromEnd(true);
    }

final LinearLayoutManager manager = (LinearLayoutManager) recyclerView.getLayoutManager();
int fir = manager.findFirstVisibleItemPosition();
int end = manager.findLastVisibleItemPosition();
final int p = Integer.parseInt(string);
if (p <= fir) {
      recyclerView.scrollToPosition(p);
} else if (p <= end) {   
    int top = recyclerView.getChildAt(p - fir).getTop(); 
    recyclerView.scrollBy(0, top);
} else {    
    recyclerView.scrollToPosition(p);    //先让当前view滚动到列表内
    move = true;
}
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener()
{    
    @Override  
      public void onScrolled(RecyclerView recyclerView, int dx, int dy) { 
        super.onScrolled(recyclerView, dx, dy);  
              if (move) {          
            move = false;     
         int n = p - manager.findFirstVisibleItemPosition(); 
if (n >= 0 && n < recyclerView.getChildCount()) {    
          recyclerView.scrollBy(0, recyclerView.getChildAt(n).getTop()); //滚动到顶部
      }    
  } 
 }
});

    LinearSmoothScroller smoothScroller = new LinearSmoothScroller(this){

        @Override
        protected int getVerticalSnapPreference() {
            return LinearSmoothScroller.SNAP_TO_START;
        }
    };

    recyclerView.getLayoutManager().startSmoothScroll(smoothScroller);

 public static final int SNAP_TO_START = -1; 
 public static final int SNAP_TO_END = 1;
 public static final int SNAP_TO_ANY = 0;