如何在没有动画的情况下更新 RecyclerView 项目？

Question

I have a RecyclerView . When I click a button inside an item in RecyclerView , I want to change the color of a View in that item. The following is my code and it works fine. But, the problem is the item will have an animation which is ugly. I want to update the item without the animation. How should I do that? By the way, I don't want to turn off the animation, only for this click event.

  public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        public ImageView imageView;
        public Button button;

        public ItemViewHolder(View view) {
            super(view);
            //do something
            button.setOnClickListener(this);
        }

        @Override
        public void onClick(View view) {
            //change color
            notifyItemChanged(getAdapterPosition());
        }
    }

Answer 1

Try this

notifyItemChanged(position, Object);

This will update the position without animating it as we are passing our Object in it.

Try this and do let me know.

For Kotlin you can use

notifyItemChanged(int position, @Nullable Object payload)

Answer 2

根据Rakshit 的回答，在Kotlin 1.2 中，以下代码可以正常工作：

notifyItemChanged(position, Unit)

Answer 3

recyclerView.getItemAnimator().setChangeDuration(0);

或者这个。

Answer 4

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

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

Ref.: https://developer.android.com/reference/androidx/recyclerview/widget/SimpleItemAnimator

Answer 5

Try this

csRecyclerView.getItemAnimator().setChangeDuration(0);

for more information RecyclerView.ItemAnimator

Answer 6

in kotlin : recyclerView.itemAnimator = null

in java : recyclerView.setItemAnimator(null);

developer said : A null return value indicates that there is no animator and that item changes will happen without any animations.

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

Answer 7

Try this:

    public ItemViewHolder(View view) {
                    super(view);
                    //do something
                    button.setOnClickListener(new View.OnClickListener()
                    {
                        @Override
                        public void onClick(View v)
                        {
                             holder.itemView.setBackgroundColor(Color.parseColor("#000000"));

                notifyDataSetChanged();

                    });;
                }
}