How to know whether a RecyclerView / LinearLayoutManager is scrolled to top or bottom?

Question

Currently I am using the follow code to check whether SwipeRefreshLayout should be enabled.

private void laySwipeToggle() {     if (mRecyclerView.getChildCount() == 0 || mRecyclerView.getChildAt(0).getTop() == 0) {         mLaySwipe.setEnabled(true);     } else {         mLaySwipe.setEnabled(false);     } } 

But here is the problem. When it's scrolled to another item's view's boundary mRecyclerView.getChildAt(0).getTop() also returns 0.

Is there something like RecyclerView.isScrolledToBottom() or RecyclerView.isScrolledToTop()?

EDIT: (mRecyclerView.getChildAt(0).getTop() == 0 && linearLayoutManager.findFirstVisibleItemPosition() == 0) kind of does the RecyclerView.isScrolledToTop(), but what about RecyclerView.isScrolledToBottom()?

Answer 1

The solution is in the layout manager.

LinearLayoutManager layoutManager = new LinearLayoutManager(this);  // Add this to your Recycler view recyclerView.setLayoutManager(layoutManager);  // To check if at the top of recycler view if(layoutManager.firstCompletelyVisibleItemPosition()==0){     // Its at top }  // To check if at the bottom of recycler view if(layoutManager.lastCompletelyVisibleItemPosition()==data.size()-1){     // Its at bottom } 

EDIT

In case your item size is larger than the screen use the following to detect the top event.

RecyclerView recyclerView = (RecyclerView) view; LinearLayoutManager linearLayoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();  int pos = linearLayoutManager.findFirstVisibleItemPosition();  if(linearLayoutManager.findViewByPosition(pos).getTop()==0 && pos==0){     return true; } 

PS: Actually, if you place the RecyclerView directly inside the SwipeRefreshview you wouldn't need to do this