我在RecyclerView上实施了更多的加载。正常滚动时它工作正常。但是当你快速滚动时（如超快），它会崩溃并提供以下日志
java.lang.NullPointerException: Attempt to read from field 'int android.support.v7.widget.RecyclerView$ItemAnimator$ItemHolderInfo.left' on a null object reference
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:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.support.design.widget.CoordinatorLayout.layoutChild(CoordinatorLayout.java:1087)
at android.support.design.widget.CoordinatorLayout.onLayoutChild(CoordinatorLayout.java:797)
at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:811)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2678)
at android.view.View.layout(View.java:16636)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2171)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1931)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
在android.view.Choreographer.doFrame（Choreographer.java:606）
以下是我设置RecyclerView
NetworkManager.getInstance(this).post(Constants.urlBuilderForListing("get_home_videos", "0"), new RequestResponseListener<JSONObject>() {
@Override
public void onResult(Boolean isSuccess, JSONObject Object) {
loader.setVisibility(View.GONE);
try {
if (isSuccess != null) {
if (isSuccess) {
list.setVisibility(View.VISIBLE);
if (Object.getInt("success") > 0) {
videos = new ArrayList<>();
JSONArray jarray = Object.getJSONArray("msg");
for (int i = 0; i < jarray.length(); i++) {
JSONObject jObj = jarray.getJSONObject(i);
Video video = new Video(jObj.getString("id"),
jObj.getString("cat_id"),
jObj.getString("cat_name"),
jObj.getString("name")
);
videos.add(video);
}
if (videos.size() > 0) {
adapter = new ListAdapter(videos, list, true, video);
adapter.setOnLoadMoreListener(PlayerActivity.this);
list.setAdapter(adapter);
}
} else {
Utils.showSnackBar(view, "No Videos to show right now.");
}
}
} else {
Utils.showSnackBar(view, "No Internet.");
}
} catch (Exception e) {
e.printStackTrace();
}
}
});
这是在调用OnLoadMore的时候
offset += 10;
try {
videos.add(null);
adapter.notifyItemInserted(videos.size() - 1);
} catch (Exception e) {
e.printStackTrace();
}
NetworkManager.getInstance(this).post(Constants.urlBuilderForListing("get_home_videos", String.valueOf(offset)), new RequestResponseListener<JSONObject>() {
@Override
public void onResult(Boolean isSuccess, JSONObject Object) {
videos.remove(videos.size() - 1);
adapter.notifyItemRemoved(videos.size());
adapter.setLoaded();
try {
if (isSuccess != null) {
if (isSuccess) {
list.setVisibility(View.VISIBLE);
if (Object.getInt("success") > 0) {
JSONArray jarray = Object.getJSONArray("msg");
for (int i = 0; i < jarray.length(); i++) {
JSONObject jObj = jarray.getJSONObject(i);
Video video = new Video(jObj.getString("id"),
jObj.getString("cat_id"),
jObj.getString("cat_name"),
jObj.getString("name"));
videos.add(video);
adapter.notifyDataSetChanged();
}
} else {
Utils.showSnackBar(view, "End of list.");
}
}
} else {
Utils.showSnackBar(view, "No Internet.");
}
} catch (Exception e) {
e.printStackTrace();
}
}
});
这里是在xml中实现recyclerview
<android.support.v7.widget.RecyclerView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical"
android:visibility="gone"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
适配器与每个适配器相同。
所以请有人告诉我为什么我会收到这个错误，以及解决这个问题的可行方法是什么。
感谢。