如何在Recyclerview中多次显示相同的firebase用户数据？

Question

我正在开发一个应用程序，其中我在Recyclerview中向用户显示数据。我使用了一个显示URL预览的库。 我的问题 每个用户都有Video1，video2和videet3节点，我想在我想在第二个video2中显示的第一个项目视图中显示每个用户的数据3次IE，以及在第三个Video3中。因此，每个用户都会有3个项目视图。以下是我的代码。请询问您是否需要任何澄清。预先感谢

[！[数据库策略] [1]] [1] [1]：https：//i.sstatic.net/xjqqt.png

Adapter类

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {

    Context context;
    ArrayList<ModelClass> modelClass = new ArrayList<>();

    public MyAdapter(Context context, ArrayList<ModelClass> modelClass) {
        this.context = context;
        this.modelClass = modelClass;
    }

    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        return new MyViewHolder(LayoutInflater.from(context).inflate(R.layout.gig_display_layout, parent, false));
    }

    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {

                holder.urlEmbeddedView.setURL(modelClass.get(position).getVideo1(), new URLEmbeddedView.OnLoadURLListener() {
                    @Override
                    public void onLoadURLCompleted(URLEmbeddedData data) {
                        holder.urlEmbeddedView.title(data.getTitle());
                        holder.urlEmbeddedView.description(data.getDescription());
                        holder.urlEmbeddedView.host(data.getHost());
                        holder.urlEmbeddedView.thumbnail(data.getThumbnailURL());
                        holder.urlEmbeddedView.favor(data.getFavorURL());
                    }
                });

    }

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

    class MyViewHolder extends RecyclerView.ViewHolder{
        URLEmbeddedView urlEmbeddedView;


        public MyViewHolder(@NonNull View itemView) {
            super(itemView);
            urlEmbeddedView = itemView.findViewById(R.id.urlView);
        }
    }
}

模型类

公共类模型clupper clupper class modelclass {

    public String  name, video1, video2, video3, videos;
    int showVideoCount = 1;
    int lifeTimeClicks = 0;
    int lifeTimeClicksOnProfile = 0;
    int dailyClicksOnProfile = 0;
    int dailyClicksByYou = 0;

    public ModelClass(String name, String video1, String video2, String video3) {
        this.name = name;
        this.video1 = video1;
        this.video2 = video2;
        this.video3 = video3;
    }
 public ModelClass() {
    }
  public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getVideo1() {
        return video1;
    }

    public void setVideo1(String video1) {
        this.video1 = video1;
    }

    public String getVideo2() {
        return video2;
    }

    public void setVideo2(String video2) {
        this.video2 = video2;
    }

    public String getVideo3() {
        return video3;
    }

    public void setVideo3(String video3) {
        this.video3 = video3;
    }

homefragment

  dRef.addListenerForSingleValueEvent(new ValueEventListener() { // singleValueEvent will only call the firebase database once
            @Override
            public void onDataChange(@NonNull DataSnapshot snapshot) {
                list = new ArrayList<ModelClass>();
                for (DataSnapshot dataSnapshot : snapshot.getChildren()) {
                    ModelClass modelClass = dataSnapshot.getValue(ModelClass.class);
                    list.add(modelClass);
                    Collections.shuffle(list); // This will shuffle the links
                }
                MyAdapter adapter  = new MyAdapter(getActivity(), list);
                recyclerView.setAdapter(adapter);
                adapter.notifyDataSetChanged();

Answer 1

SIR使用嵌套的回收库，在XML中的主要项目视图内使用另一个Recyclerview。

例如：
mainacitivty.xml

<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<android.support.v7.widget.RecyclerView
    android:id="@+id/rv_item"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"/>

</android.support.constraint.ConstraintLayout>

firstitem.xml：

            <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:app="http://schemas.android.com/apk/res-auto"
                android:orientation="vertical"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">
            
                <android.support.v7.widget.CardView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:cardBackgroundColor="#f3f3f3"
                    app:cardElevation="8dp"
                    android:layout_margin="12dp">
                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_margin="12dp"
                        android:orientation="vertical">
                        <TextView
                            android:id="@+id/tv_item_title"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:padding="12sp"
                            android:textSize="18sp"
                            android:text="Item Title"/>
//recycler for video
                        <android.support.v7.widget.RecyclerView
                            android:id="@+id/rv_sub_item"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"/>
                    </LinearLayout>
                </android.support.v7.widget.CardView>
            
            </LinearLayout>
        

subitem.xml（用于显示视频）：

 <?xml version="1.0" encoding="utf-8"?>
           <FrameLayout
                xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">
            
                <android.support.v7.widget.CardView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_margin="12dp">
                    <RelativeLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content">
                        
                            <TextView
                                android:id="@+id/tv_sub_item_title"
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:textStyle="bold"
                                android:text="Sub item title"/> //Video
                      
                    </RelativeLayout>
                </android.support.v7.widget.CardView>
            
            </FrameLayout>

您已经拥有Mainitem的模型和适配器，现在创建模型和模型SubItem的适配器（用于视频），现在在MainiteMadapter的OnBindViewHolder中，SET SUBITEM布局，也在MainiteMadapter的ItemViewholder中初始化。

，例如这样的东西

  @Override
    public void onBindViewHolder(@NonNull ItemViewHolder itemViewHolder, int i) {
   
     LinearLayoutManager layoutManager = new LinearLayoutManager(
                    itemViewHolder.rvSubItem.getContext(),
                    LinearLayoutManager.VERTICAL,
                    false
            );
     // Create sub item view adapter
      SubItemAdapter subItemAdapter = new SubItemAdapter(item.getSubItemList());
    
            itemViewHolder.rvSubItem.setLayoutManager(layoutManager);
            itemViewHolder.rvSubItem.setAdapter(subItemAdapter);
            itemViewHolder.rvSubItem.setRecycledViewPool(viewPool);

 }

    class ItemViewHolder extends RecyclerView.ViewHolder {
            private TextView tvItemTitle;
            private RecyclerView rvSubItem;
    
            ItemViewHolder(View itemView) {
                super(itemView);
                tvItemTitle = itemView.findViewById(R.id.tv_item_title);
                rvSubItem = itemView.findViewById(R.id.rv_sub_item);
            }
        }