刚刚在我的代码中实现了RecyclerView,取代了ListView。

一切都很好。显示数据。

但是错误消息正在被记录:

15:25:53.476 E/RecyclerView: No adapter attached; skipping layout

15:25:53.655 E/RecyclerView: No adapter attached; skipping layout

对于以下代码:

ArtistArrayAdapter adapter = new ArtistArrayAdapter(this, artists);
recyclerView = (RecyclerView) findViewById(R.id.cardList);
recyclerView.setHasFixedSize(true);
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(this));

正如您所看到的,我已经为RecyclerView附加了一个适配器。 为什么我总是得到这个错误呢?

我读过与这个问题相关的其他问题,但没有一个有用。


当前回答

确保在你的数据绑定或任何你用来显示视图的方法的充气()方法中将attachtorroot属性设置为false:

充气(layoutInflater, parent, false)

其他回答

我因为这个问题失去了16分钟的生命,所以我要承认这个令人难以置信的尴尬的错误,我正在使用Butterknife,我在这个片段中绑定onCreateView中的视图。

花了很长时间才弄清楚为什么我没有布局管理器-但显然,视图是注入的,所以它们实际上不会为空,所以回收器永远不会为空。哎呀!

@BindView(R.id.recycler_view)
RecyclerView recyclerView;

    @Override
public View onCreateView(......) {
    View v = ...;
    ButterKnife.bind(this, v);
    setUpRecycler()
 }

public void setUpRecycler(Data data)
   if (recyclerView == null) {
 /*very silly because this will never happen*/
       LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());
       //more setup
       //...
    }
    recyclerView.setAdapter(new XAdapter(data));
}

如果你遇到这样的问题,跟踪你的视图,使用uiautomatorviewer之类的东西

这个问题是因为您没有为您的RecyclerView添加任何LayoutManager。

另一个原因是因为你在NonUIThread中调用了这个代码。确保在UIThread中调用这个调用。

解决方案是你必须在UI线程中setAdapter之前为RecyclerView添加一个LayoutManager。

recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));

发生这种情况是因为实际的膨胀布局与您在查找recyclerView时引用的布局不同。默认情况下,当你创建片段时,onCreateView方法如下所示: 返回inflater.inflate(出来。< >相关布局,container.false);

相反,单独创建视图并使用它引用recyclerView 视图视图= inflater. inflation (r.p ayler .layout。< >相关布局,container.false); recyclerview = view.findViewById (R.id。< recyclerView ID >); 返回视图;

首先初始化适配器

public void initializeComments(){
    comments = new ArrayList<>();

    comments_myRecyclerView = (RecyclerView) findViewById(R.id.comments_recycler);
    comments_mLayoutManager = new LinearLayoutManager(myContext);
    comments_myRecyclerView.setLayoutManager(comments_mLayoutManager);

    updateComments();
    getCommentsData();

}

public void updateComments(){

    comments_mAdapter = new CommentsAdapter(comments, myContext);
    comments_myRecyclerView.setAdapter(comments_mAdapter);
}

当数据集中发生变化时,只需调用updateComments方法。

我得到了同样的问题,我做的每件事都是正确的,除了在xml文件:

step first 1: initialize recyclerview & List & Adaptor: RecyclerView recyclerview; List<ModelName> list; ProvideBidAdaptor adaptor; step 2: bind it in onCreate- recyclerview = findByViewId(R.id.providerBidRV); recyclerview.setLayoutManager(new LinearLayoutManager(this)); recyclerview.setHasFixedSize(true); list = new ArrayList<>(); step 3: Where you getting response or list - add list- (i am getting from response)> responseList.addAll(response.getResponse()); adaptor = new ProvideBidAdaptor(this, responseList); binding.detailsRV.setAdapter(adaptor);

这是我的xml文件,我实现RecyclerView: 我忘记了线性布局的方向,经过这个修正- RecyclerView附加。

<?xml version="1.0" encoding="utf-8"?>
    <layout>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:context=".activities.Bidding.ProvideBid">

        <include
            android:id="@+id/toolbar"
            layout="@layout/app_toolbar"/>

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/providerBidRV"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
    </LinearLayout>
</layout> 

这是适配器:

    public class ProvideBidAdaptor extends RecyclerView.Adapter<ProvideBidAdaptor.ViewHolder> {
    Context context;
    List<Response> responseList;
    DateTime dateTimeInstance = new DateTime();

    public ProvideBidAdaptor(Context context, List<Response> responseList) {
        this.context = context;
        this.responseList = responseList;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.geo_presence_item_list, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        final Response detailsResponse = responseList.get(position);
        if (!detailsResponse.getUserId().isEmpty()) {

            holder.day.setText(detailsResponse.getDay());
            holder.locationType.setText(detailsResponse.getLocationType());

        }

    }

    @Override
    public int getItemCount() {
        return responseList.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        TextView date,locationType;
        CardView provideBidCV;
        LinearLayout dayLLayout,locationTypeLLayout;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            date = itemView.findViewById(R.id.date_value);
            day = itemView.findViewById(R.id.day_value);
            locationType = itemView.findViewById(R.id.locationType_value);

            locationTypeLLayout = itemView.findViewById(R.id.locationTypeLLayout);

        }
    }
}