如何实现RecyclerView的ItemAnimator禁用notifyItemChanged的动画 [英] How to implement ItemAnimator of RecyclerView to disable the animation of notifyItemChanged

问题描述

在我的项目中，我需要在 notifyItemChanged 时禁用 RecyclerView 的更改"动画.

我在RecyclerView的源代码中进行了调查，并重写了android.support.v7.widget.DefaultItemAnimator如下:

私有静态类ItemAnimator扩展了DefaultItemAnimator{@覆盖public boolean animateChange(RecyclerView.ViewHolder oldHolder, RecyclerView.ViewHolder newHolder, int fromX, int fromY, int toX, int toY) {if(oldHolder != null){oldHolder.itemView.setVisibility(View.INVISIBLE);dispatchChangeFinished(oldHolder, true);}if(newHolder != null){dispatchChangeFinished(newHolder, false);}返回假；}}

但我不确定我是否符合 Google 文档的规范:RecyclerView.ItemAnimator.animateChange

根据我对源代码的理解，如果我没有正确覆盖该方法，oldHolder不会被回收.

请帮我弄清楚如何以正确的方式覆盖animateChange.

解决方案

我找到了删除 animateChange 的正确解决方案.

很简单.Google 已实现该功能.

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

文档:setSupportsChangeAnimations>

In my project I need disable the "change" animation of RecyclerView while notifyItemChanged.

I investigated in the source of RecyclerView and had overridden android.support.v7.widget.DefaultItemAnimator as below:

private static  class ItemAnimator extends DefaultItemAnimator
{
    @Override
    public boolean animateChange(RecyclerView.ViewHolder oldHolder, RecyclerView.ViewHolder newHolder, int fromX, int fromY, int toX, int toY) {
        if(oldHolder != null)
        {
            oldHolder.itemView.setVisibility(View.INVISIBLE);
            dispatchChangeFinished(oldHolder, true);
        }

        if(newHolder != null)
        {
            dispatchChangeFinished(newHolder, false);
        }

        return false;
    }
}

But I am not sure if I match the spec of the Google document: RecyclerView.ItemAnimator.animateChange

According to my understanding source code, if I do not override the method properly, the oldHolder will not be recycled.

Please help me figure out how to override animateChange in a correct way.

解决方案

I have found the correct solution to just remove the animateChange.

It's very simple. Google has implemented the functionality.

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

Documentation: setSupportsChangeAnimations

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