how to keep RecyclerView always scroll bottom

Question

I Use Recyclerview Replace with list view I want to keep Recyclerview always scroll bottom.

ListView can use this method setTranscriptMode(AbsListView.TRANSCRIPT_MODE_ALWAYS_SCROLL)

RecyclerView I use method smoothScrollToPosition(myAdapter.getItemCount() - 1)

but when Soft keyboard Pop ,its replace RecyclerView content.

Did you resolve the problem at last? I find setReverseLayout to true will cause the item displayed from top to bottom, it's not suitable for chat. — CodeAlien, Sep 04 '15 at 10:02
you can try my answer: http://stackoverflow.com/a/43647835/6482350 — DysaniazzZ, Apr 28 '17 at 02:23

score 48 · Answer 1 · answered Mar 17 '16 at 12:22

48

If you want to keep the scroll position anchored to the bottom of the RecyclerView, it's useful in chat apps. just call setStackFromEnd(true) to on the LinearLayoutManager to make the keyboard keep the list items anchored on the bottom (the keyboard) and not the top.

answered Mar 17 '16 at 12:22

Kirill Kulakov

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Works only for the first time for me...and yes I am making a chat app – prateek31 Dec 01 '16 at 14:22
This worked. Setting this in the xml file didn't work. – Samuel Robert Jan 23 '17 at 17:42
1

@larrytech wasn't it clear from the answer that should be invoked on the `LinearLayoutManager`? – Kirill Kulakov Feb 21 '17 at 15:00
It doesn't work. It's reversed but it doesn't scroll to the bottom. – User Feb 28 '20 at 12:29

score 37 · Accepted Answer · answered Nov 21 '14 at 06:47

37

This is because RV thinks its reference point is TOP and when keyboard comes up, RV's size is updated by the parent and RV keeps its reference point stable. (thus keeps the top position at the same location)

You can set LayoutManager#ReverseLayout to true in which case RV will layout items from the end of the adapter.

e.g. adapter position 0 is at the bottom, 1 is above it etc...

This will of course require you to reverse the order of your adapter.

I'm not sure but setting stack from end may also give you the same result w/o reordering your adapter.

answered Nov 21 '14 at 06:47

yigit

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thanks,you solve my problem. i use reverseLayout param – lj wang Nov 21 '14 at 08:52
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The layout contents got reversed, but the list didn't scroll to the end. Even stackFromBottom didn't help. – Codevalley Feb 02 '15 at 05:02
Just an addition: Sometimes setting `stackFromEnd` in XML is **not** working while calling the method on code does. – guness Dec 16 '15 at 10:03
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If you set both stackFromEnd=true and setReverseLayout=true it doesn't work. Does anyone know any workaround? – Luccas Correa Jan 22 '16 at 17:21
@LuccasCorrea How did you get it to work? I used llm.setStackFromEnd(true); and mRecyclerView.scrollToPosition(mItemsList.size() - 1); on adding an item at the bottom of the list. Let me know if you found any other way. – Nitin Sethi Mar 24 '16 at 20:03
1

mLinearLayoutManager.setStackFromEnd(true); really helped for keyboard opening fix recyclerView.. Thanks man.. :) – Meet Vora Jun 16 '16 at 12:17
In my case, I set both `reverseLayout` and `stackFromEnd` to true, and sort my data reversely, which works just like a Chat list. – Evi Song Mar 04 '18 at 07:01
I set `reverseLayout` and `stackFromEnd` and sorted the data reversely - everything got reversed but it doesn't scroll to the end. – User Feb 28 '20 at 12:29

score 6 · Answer 3 · edited Mar 25 '16 at 15:24

6

recyclerView.scrollToPosition(getAdapter().getItemCount()-1);

edited Mar 25 '16 at 15:24

Bacteria

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answered Mar 25 '16 at 08:03

jun xia

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This doesn't work well when users scroll up a bit and wish to stay same for the whatever last visible item. – John Pang Jan 08 '17 at 19:38

score 5 · Answer 4 · edited May 23 '17 at 11:33

I have faced the same problem and I solved it using the approach mentioned here. It is used to detect whether soft keyboard is open or not and if it is open, just call the smoothScrollToPosition() method.

A much simpler solution is to give your activity's root view a known ID, say '@+id/activityRoot', hook a GlobalLayoutListener into the ViewTreeObserver, and from there calculate the size diff between your activity's view root and the window size:

final View activityRootView = findViewById(R.id.activityRoot);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
    int heightDiff = activityRootView.getRootView().getHeight() - activityRootView.getHeight();
    if (heightDiff > 100) { 
        recyclerView.smoothScrollToPosition(myAdapter.getItemCount() - 1);
    }
 }
});

Easy!

this works best out of all the answers on this page, however, when you implement the code be sure to check that `myAdapter.getItemCount() > 0` Otherwise when the app starts up without items in the list, it'll crash because it tries to scroll to position -1 — Someone Somewhere, Apr 16 '19 at 15:58

score 1 · Answer 5 · answered Nov 18 '16 at 10:27

I have also faced same problem. But following code help me. I hope this is useful.

In this staus is arraylist.

 recyclerView.scrollToPosition(staus.size()-1);

next one is:- In This you can use adapter class

   recyclerView.scrollToPosition(showAdapter.getItemCount()-1);

how to keep RecyclerView always scroll bottom

5 Answers5

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