Override animation for notifyItemChanged in RecyclerView.Adapter

Question

Well, I have a RecyclerView with an adapter and everything works great. The items in the ArrayList dataset are being updated periodically. So the items and their elements as well as their position in the list change. This is achieved by simple sorting and manually calling these methods, whenever things happen:

// swapping two items
Collections.swap(items, i, j);
itemsAdapter.notifyItemMoved(i, j);

// adding a new one
itemAdapter.notifyItemInserted(items.size());

// when updating valus
itemAdapter.notifyItemChanged(i);

The latter of which, is the cause of my misery. Every time an item is updated, a little "blink" animation is triggered.

I found a couple of solutions for this:

// disabling all animations
recyclerView.getItemAnimator().setSupportsChangeAnimations(false);

// or

// setting the animation duration to zero,
recyclerView.getItemAnimator().setChangeDuration(0);

But both of these kill the animations when items move (being swapped). I just want to override the one animation and keep all of this magic. Is there a way of doing this? And if it's overriding ItemAnimator, does anyone have a simple example?

Thanks in advance!

Did you find a solution for this. I tried with .setSupportsChangeAnimation(false) but i still get a blink with notifyItemChanged. — Roberto Betancourt, Aug 30 '15 at 21:01

score 124 · Answer 1 · edited Aug 16 '20 at 08:29

124

There is a dedicated method to disable just item changed animations:

((SimpleItemAnimator) myRecyclerView.getItemAnimator()).setSupportsChangeAnimations(false);

Official docs.

edited Aug 16 '20 at 08:29

Deepti

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answered Apr 12 '16 at 11:10

Pablo A. Martínez

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I wanted to remove the built-in "dim" animation when calling notifyItemChanged() -- this worked perfectly. Using AppCompat-v7:25.3.1 – the_dude_abides Aug 17 '17 at 17:04
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this doesn't work well with constraintLayout defined in an item. some of the items slightly move to different positions then show normally again. still doesn't work as expected – Desolator Sep 28 '17 at 06:39
Doesn't really work - https://stackoverflow.com/questions/35766497/disable-onchange-animations-on-itemanimator-for-recyclerview – Cheok Yan Cheng Apr 12 '18 at 23:06
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Strange but animations continue to appear. – CoolMind Apr 26 '18 at 08:47
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perfect answer for my use case. Thank you very much. – Saksham Khurana Oct 08 '18 at 08:00

Alex · Accepted Answer · 2015-09-01T12:37:43.757

Yes, I did.

First, get the source code of DefaultItemAnimator. Take the code and create a class named MyItemAnimator in your project. Then, set the ItemAnimator to a new instance of your modified MyItemAnimator, like so:

recyclerView.setItemAnimator(new MyItemAnimator());

Now, go in the new classes source code and locate the method

animateChangeImpl(final ChangeInfo changeInfo) { ... }

We simply have to locate the method calls changing alpha values. Find the following two lines and remove the .alpha(0) and .alpha(1)

oldViewAnim.alpha(0).setListener(new VpaListenerAdapter() { ... }
newViewAnimation.translationX(0).translationY(0).setDuration(getChangeDuration()).alpha(1).setListener(new VpaListenerAdapter() { ... }

like so

oldViewAnim.setListener(new VpaListenerAdapter() { ... }
newViewAnimation.translationX(0).translationY(0).setDuration(getChangeDuration()).setListener(new VpaListenerAdapter() { ... }

Hacky but spot on. Link to support lib v7 source https://android.googlesource.com/platform/frameworks/support/+/refs/heads/master/v7/recyclerview/src/android/support/v7/widget/DefaultItemAnimator.java — r3flss ExlUtr, Aug 12 '16 at 15:46
this removes the fadeIn/out effects when you show/hide items in the recyclerview item. — Desolator, Sep 28 '17 at 06:36

score 24 · Answer 3 · answered May 10 '17 at 09:13

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Try setting:

mRecyclerview.setItemAnimator(null);

answered May 10 '17 at 09:13

box

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MBH · Answer 4 · 2018-02-19T11:27:31.183

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Kotlin version of @Pablo A. Martínez answer:

(recyclerView.itemAnimator as SimpleItemAnimator).supportsChangeAnimations = false

edited Feb 19 '18 at 11:27

answered Nov 04 '17 at 18:11

MBH

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(recyclerView.itemAnimator as SimpleItemAnimator).supportsChangeAnimations = false – Salmaan Nov 06 '17 at 09:11

score 5 · Answer 5 · edited Dec 19 '17 at 13:07

If you are only modifying the data of Recyclerview means no addition or deletion of item then you should add this line.

mRecyclerview.setHasFixedSize(true);

So that recyclerview will get to know there is no change in size after that you can apply

((SimpleItemAnimator) mRecyclerview.getItemAnimator()).setSupportsChangeAnimations(false);

So that animation will be disappear and code will work like charm :)

score 4 · Answer 6 · answered Nov 20 '15 at 16:04

Slight variation on Alex's answer.

Instead of removing the alpha change altogether, I just reduced it. the only changes needed were:

        //changed alpha from 0
        ViewCompat.setAlpha(newHolder.itemView, 0.5f);

and

        //changed alpha from 0
        oldViewAnim.alpha(0.5f).setListener(new VpaListenerAdapter() {

In both cases, change the 0 to 0.5 This has the effect of removing the flicker associated with the alpha going completely to 0, but keeps the morphing qualities of the item change animation.

score 1 · Answer 7 · answered Jul 29 '16 at 11:05

1

In my case the recyclerview took all the space below toolbar. All I did was changing the layout_height of recyclerview from wrap_content to match_parent and blinking disappeared.

answered Jul 29 '16 at 11:05

Code4Fun

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Override animation for notifyItemChanged in RecyclerView.Adapter

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