How to know if a RecyclerView has enough content to scroll?

Question

Currently I am using a RecyclerView with a LinearLayout Manager and an EditText as HeaderView for filtering the content of the list.

I would like to hide the EditText if the content of the RecyclerView is smaller than the RecyclerView itself.

Is there any way to "ask" the Recyclerview or the LayoutManager if its content can scroll?

Thank you all.

score 4 · Accepted Answer · answered Jul 16 '15 at 16:58

4

RecyclerView can't scroll anymore when the item at last position is completely visible.

In condition that would sound as:

mRecyclerView.getLayoutManager().findLastCompletelyVisibleItemPosition() == mRecyclerViewAdapter.getItemCount() - 1;

answered Jul 16 '15 at 16:58

Nikola Despotoski

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make sure, that `layout_height` is set to `match_parent`, otherwise, you will get a different height (initial default height), and therefore a different number for the last visible element. – Javatar Feb 16 '17 at 17:22

score 1 · Answer 2 · answered Sep 06 '18 at 11:42

An answer that also accounts for dynamic screen sizes.

mRecyclerView.getViewTreeObserver().addOnScrollChangedListener(() -> {

    if (mRecyclerView.canScrollVertically(1) && //still scrolling
        mRecyclerView.computeVerticalScrollRange() >= mRecyclerView.getHeight()) { //Big enough for scrolling

        return;  //we still scrolling so early out.
        }

    DoMyFunction();
}

score 0 · Answer 3 · answered Jul 14 '15 at 14:26

0

do you mean this:

https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager.html#canScrollVertically()

if(recyclerView.getLayoutManager().canScrollVertically()){
    // do stuff
} else{
    // do other stuff
}

answered Jul 14 '15 at 14:26

Budius

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Alternative, `recyclerView.getLayoutManager().findLastCompletelyVisibleItemPosition() == adapter.getItemCount() -1;` – Nikola Despotoski Jul 15 '15 at 09:02
@NikolaDespotoski quite more complicated, uh? – Budius Jul 15 '15 at 09:05
Budius thank you but to me your code always return true even if the recyclerView does not scroll. @NikolaDespotoski thank you I'll try your method later. – Leonardo Medori Jul 15 '15 at 14:04
@NikolaDespotoski Your solution works for me, thank you very much. – Leonardo Medori Jul 16 '15 at 14:43
@LeonardoMedori Good. I have posted it as answer. – Nikola Despotoski Jul 16 '15 at 16:58

How to know if a RecyclerView has enough content to scroll?

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