RecyclerView 中的矢量动画

Question

前言
我想在 RecyclerView 中实现一个下载动画。在 onBindViewHolder 和 onViewRecycled 中，我订阅和取消订阅演示者，它检索已下载文件的百分比。我开始动画：

        AnimatedVectorDrawableCompat drawable = AnimatedVectorDrawableCompat.create(context, R.drawable.download_animated);
        if (drawable != null) {
            holder.downloadingIcon.setImageDrawable(drawable);
            drawable.start();
        }

问题
我在动画完成后立即调用了 onViewRecycled 并遵循堆栈跟踪：

java.lang.RuntimeException
at EventRecyclerViewAdapter.onViewRecycled(EventRecyclerViewAdapter.java:271)
at android.support.v7.widget.RecyclerView$Recycler.dispatchViewRecycled(RecyclerView.java:6064)
at android.support.v7.widget.RecyclerView$Recycler.addViewHolderToRecycledViewPool(RecyclerView.java:5835)
at android.support.v7.widget.RecyclerView$Recycler.recycleViewHolderInternal(RecyclerView.java:5800)
at android.support.v7.widget.RecyclerView.removeAnimatingView(RecyclerView.java:1305)
at android.support.v7.widget.RecyclerView$ItemAnimatorRestoreListener.onAnimationFinished(RecyclerView.java:11775)
at android.support.v7.widget.RecyclerView$ItemAnimator.dispatchAnimationFinished(RecyclerView.java:12275)
at android.support.v7.widget.SimpleItemAnimator.dispatchChangeFinished(SimpleItemAnimator.java:304)
at android.support.v7.widget.DefaultItemAnimator.onAnimationEnd(DefaultItemAnimator.java:363)
at android.support.v4.view.ViewPropertyAnimatorCompatJB.onAnimationEnd(ViewPropertyAnimatorCompatJB.java:51)
at android.view.ViewPropertyAnimator$AnimatorEventListener.onAnimationEnd(ViewPropertyAnimator.java:1121)
at android.animation.ValueAnimator.endAnimation(ValueAnimator.java:1149)
at android.animation.ValueAnimator.doAnimationFrame(ValueAnimator.java:1309)
at android.animation.AnimationHandler.doAnimationFrame(AnimationHandler.java:146)
at android.animation.AnimationHandler.-wrap2(AnimationHandler.java)
at android.animation.AnimationHandler.doFrame(AnimationHandler.java:54)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:957)
at android.view.Choreographer.doCallbacks(Choreographer.java:734)
at android.view.Choreographer.doFrame(Choreographer.java:667)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:945)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)

问题
为什么会这样，我该如何解决？

Answer 1

事实证明，notifyItemChanged 导致回收之前的 ViewHolder，因此 onBindViewHolder 和 onViewRecycled 是调用...但在不同的实例。首先 onBindViewHolder 被调用 new ViewHolder 实例。接下来 onViewRecycled 使用 old ViewHolder 调用。
在我的例子中，问题只依赖于一个 id 的模型。它没有明确描述我用来通知更新的 Presenter's View。

RecyclerView 中的矢量动画

Vector animation in RecyclerView

android

android-recyclerview

objectanimator

android-vectordrawable