Android 判断Recycleview滑动到顶部还是底部

方法1

mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {

            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                Log.i(TAG, "--------------------------------------");
                if(mRecyclerView.canScrollVertically(1)){
                    Log.i(TAG, "direction 1: true");
                }else {
                    Log.i(TAG, "direction 1: false");//滑动到底部
                }
                if(mRecyclerView.canScrollVertically(-1)){
                    Log.i(TAG, "direction -1: true");
                }else {
                    Log.i(TAG, "direction -1: false");//滑动到顶部
                }
            }
        });

方法2

mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
            public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                //根据自己的应用场景，也可以在这里调用
            }
            
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                Log.i(TAG, "--------------------------------------");
                LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
                int firstCompletelyVisibleItemPosition = layoutManager.findFirstCompletelyVisibleItemPosition();
                Log.i(TAG, "firstCompletelyVisibleItemPosition: "+firstCompletelyVisibleItemPosition);
                if(firstCompletelyVisibleItemPosition==0)
                    Log.i(TAG, "滑动到顶部");

                int lastCompletelyVisibleItemPosition = layoutManager.findLastCompletelyVisibleItemPosition();
                Log.i(TAG, "lastCompletelyVisibleItemPosition: "+lastCompletelyVisibleItemPosition);
                if(lastCompletelyVisibleItemPosition==layoutManager.getItemCount()-1)
                    Log.i(TAG, "滑动到底部");
            }
        });

方法3：

recycleview.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                
            }

            @Override
            public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                int topRowVerticalPosition = (recyclerView == null || recyclerView.getChildCount() == 0) ? 0 :
                        recyclerView.getChildAt(0).getTop();
               if( topRowVerticalPosition >= 0){
               //滑动到顶部
               }
            }
        });

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原文链接：https://blog.csdn.net/lylodyf/article/details/80950000