小编xox*_*_89的帖子

在新的RecyclerView中,我们可以使用wrap_content高度(或宽度).所以谷歌修复了错误 - https://code.google.com/p/android/issues/detail?id=74772
但最终并非一切都很顺利.
从RecyclerView中删除项目时,我尝试使用消失的动画.所以我使用适配器的方法 - notifyItemRemoved(int)与任何参数和RecyclerView导致NullPointerException.

Xml代码:

...
    <RecyclerView
        android:id="@+id/RecyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scrollbars="vertical"
        android:overScrollMode="always"/>
    ...

日志:

E/AndroidRuntime: FATAL EXCEPTION: main
 java.lang.NullPointerException
     at android.support.v7.widget.SimpleItemAnimator.animateDisappearance(SimpleItemAnimator.java:78)
     at android.support.v7.widget.RecyclerView.animateDisappearance(RecyclerView.java:3246)
     at android.support.v7.widget.RecyclerView.access$700(RecyclerView.java:147)
     at android.support.v7.widget.RecyclerView$4.processDisappeared(RecyclerView.java:422)
     at android.support.v7.widget.ViewInfoStore.process(ViewInfoStore.java:231)
     at android.support.v7.widget.RecyclerView.dispatchLayoutStep3(RecyclerView.java:3086)
     at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2914)
     at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3277)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1021)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1663)
     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1521)
     at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1663)
     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1521)
     at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
     at android.view.View.layout(View.java:14015) …