android - 调用 notifyitemchanged 后的动画问题

Question

我有一个 ImageView，其中使用 Glide 加载图像。当我执行了 like 操作后，使用 notifyItemChanged(position) 通知回收器 View 适配器。它会导致图像闪烁 2 次。任何人都可以在这里帮助我。

这部分代码在 notifyItemChanged(position) 被调用时执行:

    Glide.with(mContext)
    .load(mainImage)
    .placeholder(R.color.grey_light)
    .diskCacheStrategy(DiskCacheStrategy.ALL)
    .into(listItemHolder.mSingleAttachmentImage);

提前致谢。

Answer 1

方案一:

ItemAnimator animator = mRecyclerView.getItemAnimator();
if (animator instanceof SimpleItemAnimator) {
    ((SimpleItemAnimator) animator).setSupportsChangeAnimations(false);
}

ref https://github.com/bumptech/glide/issues/1599

---

方案二:

notifyItemChanged(int position) > notifyItemRangeChanged(int positionStart, int itemCount) > notifyItemRangeChanged(positionStart, itemCount, null) ;

/**
         * Notify any registered observers that the item at <code>position</code> has changed with an
         * optional payload object.
         *
         * <p>This is an item change event, not a structural change event. It indicates that any
         * reflection of the data at <code>position</code> is out of date and should be updated.
         * The item at <code>position</code> retains the same identity.
         * </p>
         *
         * <p>
         * Client can optionally pass a payload for partial change. These payloads will be merged
         * and may be passed to adapter's {@link #onBindViewHolder(ViewHolder, int, List)} if the
         * item is already represented by a ViewHolder and it will be rebound to the same
         * ViewHolder. A notifyItemRangeChanged() with null payload will clear all existing
         * payloads on that item and prevent future payload until
         * {@link #onBindViewHolder(ViewHolder, int, List)} is called. Adapter should not assume
         * that the payload will always be passed to onBindViewHolder(), e.g. when the view is not
         * attached, the payload will be simply dropped.
         *
         * @param position Position of the item that has changed
         * @param payload Optional parameter, use null to identify a "full" update
         *
         * @see #notifyItemRangeChanged(int, int)
         */
        public final void notifyItemChanged(int position, Object payload) {
            mObservable.notifyItemRangeChanged(position, 1, payload);
        }

注意@param payload 可选参数，使用null来标识“完整”更新

您可以使用 notifyItemChanged(position,position) 并在 RecyclerView.Adapter.onBindViewHolder() 中执行 changeView