Android 我该如何解决；回收器视图无适配器，将数据（订单）从firebase加载到回收器视图时跳过布局错误？

我已经实现了recycler视图，一切正常，但没有显示任何数据

正在显示的错误消息是

E/RecyclerView: No adapter attached; skipping layout

E/RecyclerView：未连接适配器；跳过布局

对于以下代码行

private ArrayList<ModelOrderUser> orderList;
private AdapterOrderUser adapterOrderUser;--------> adapter,arraylist,recyclerView initialization
private RecyclerView orders_user_Rv;

使用数据设置适配器的方法调用（在onCreate方法下）

加载顺序（）；如下图所示

private void loadOrders() {
    //init order list
    orderList = new ArrayList<>();
    //get orders
    DatabaseReference ref = FirebaseDatabase.getInstance().getReference("Users");
    ref.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot snapshot) {
            orderList.clear();
            for (DataSnapshot ds: snapshot.getChildren()){
                String uid = ""+ds.getRef().getKey();
                DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Users").child(uid).child("Orders");
                reference.orderByChild("orderBy").equalTo(firebaseAuth.getUid())
                        .addValueEventListener(new ValueEventListener() {
                            @Override
                            public void onDataChange(@NonNull DataSnapshot snapshot) {
                                if (snapshot.exists()){
                                    for (DataSnapshot ds: snapshot.getChildren()){
                                        ModelOrderUser modelOrderUser = ds.getValue(ModelOrderUser.class);

                                        //add to list
                                        orderList.add(modelOrderUser);
                                    }
                                    //setup adapter
                                    adapterOrderUser = new AdapterOrderUser(HomePage.this, orderList);
                                    //set to recyclerview
                                    orders_user_Rv.setAdapter(adapterOrderUser);
                                }
                            }

                            @Override
                            public void onCancelled(@NonNull DatabaseError error) {

                            }
                        });
            }
        }

        @Override
        public void onCancelled(@NonNull DatabaseError error) {

        }
    });

<androidx.recyclerview.widget.RecyclerView
            android:id="@+id/order_userRv"
            android:layout_below="@id/ordersTv"
            android:layout_marginTop="5dp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
            tools:listitem="@layout/row_order_user"/>

public class AdapterOrderUser extends  RecyclerView.Adapter<AdapterOrderUser.HolderOrderUser> {

private Context oContext;
private ArrayList<ModelOrderUser> orderUserList;

public AdapterOrderUser(Context oContext, ArrayList<ModelOrderUser> orderUserList) {
    this.oContext = oContext;
    this.orderUserList = orderUserList;
}

@NonNull
@Override
public HolderOrderUser onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    // inflate layout
    View view = LayoutInflater.from(oContext).inflate(R.layout.row_order_user, parent, false);
    return new HolderOrderUser(view);
}

@Override
public void onBindViewHolder(@NonNull HolderOrderUser holder, int position) {
    //get data
    ModelOrderUser modelOrderUser = orderUserList.get(position);
    String orderId = modelOrderUser.getOrderId();
    String orderBy = modelOrderUser.getOrderBy();
    String orderCost = modelOrderUser.getOrderCost();
    String orderStatus = modelOrderUser.getOrderStatus();
    String orderTime = modelOrderUser.getOrderTime();

    //set data

    holder.amountTv.setText("Amount: Ksh" +orderCost);
    holder.statusTv.setText(orderStatus);
    holder.orderIdTv.setText("OrderID:"+ orderId);
    //change order status color
    if ("In Progress".equals(orderStatus)){
        holder.statusTv.setTextColor(oContext.getResources().getColor(R.color.colorPrimary));
    }else if ("Completed".equals(orderStatus)){
        holder.statusTv.setTextColor(oContext.getResources().getColor(R.color.green));
    }else if ("Cancelled".equals(orderStatus)){
        holder.statusTv.setTextColor(oContext.getResources().getColor(R.color.red));
    }
    //convert timeStamp to proper format
    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(Long.parseLong(orderTime));
    String formattedDate = DateFormat.format("dd/mm/yyyy", calendar).toString();

    holder.dateTv.setText(formattedDate);

}

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

//view holder class
class HolderOrderUser extends RecyclerView.ViewHolder{

    //views of layout
    private TextView orderIdTv, dateTv, amountTv, statusTv;
    public HolderOrderUser(@NonNull View itemView) {
        super(itemView);

        orderIdTv = itemView.findViewById(R.id.orderIdTv);
        dateTv = itemView.findViewById(R.id.orderDateTv);
        amountTv = itemView.findViewById(R.id.orderamountTv);
        statusTv = itemView.findViewById(R.id.orderStatusTv);
    }
}

private void loadOrders（）{
//初始订单列表
orderList=新的ArrayList（）；
//接到命令
DatabaseReference ref=FirebaseDatabase.getInstance（）.getReference（“用户”）；
ref.addValueEventListener（新的ValueEventListener（）{
@凌驾
public void onDataChange（@NonNull DataSnapshot snapshot snapshot）{
clear（）；
对于（DataSnapshot ds:snapshot.getChildren（））{
字符串uid=“”+ds.getRef（）.getKey（）；
DatabaseReference=FirebaseDatabase.getInstance（）.getReference（“用户”）.child（uid）.child（“订单”）；
reference.orderByChild（“orderBy”）.equalTo（firebaseAuth.getUid（））
.addValueEventListener（新的ValueEventListener（）{
@凌驾
public void onDataChange（@NonNull DataSnapshot snapshot snapshot）{
if（snapshot.exists（））{
对于（DataSnapshot ds:snapshot.getChildren（））{
ModelOrderUser ModelOrderUser=ds.getValue（ModelOrderUser.class）；
//添加到列表中
添加（modelOrderUser）；
}
//安装适配器
adapterOrderUser=新adapterOrderUser（HomePage.this，orderList）；
//设置为recyclerview
订购用户设置适配器（适配器或接收器）；
}
}
@凌驾
已取消公共void（@NonNull DatabaseError）{
}
});
}
}
@凌驾
已取消公共void（@NonNull DatabaseError）{
}
});

recycler视图的XML代码如下所示

private void loadOrders() {
    //init order list
    orderList = new ArrayList<>();
    //get orders
    DatabaseReference ref = FirebaseDatabase.getInstance().getReference("Users");
    ref.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot snapshot) {
            orderList.clear();
            for (DataSnapshot ds: snapshot.getChildren()){
                String uid = ""+ds.getRef().getKey();
                DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Users").child(uid).child("Orders");
                reference.orderByChild("orderBy").equalTo(firebaseAuth.getUid())
                        .addValueEventListener(new ValueEventListener() {
                            @Override
                            public void onDataChange(@NonNull DataSnapshot snapshot) {
                                if (snapshot.exists()){
                                    for (DataSnapshot ds: snapshot.getChildren()){
                                        ModelOrderUser modelOrderUser = ds.getValue(ModelOrderUser.class);

                                        //add to list
                                        orderList.add(modelOrderUser);
                                    }
                                    //setup adapter
                                    adapterOrderUser = new AdapterOrderUser(HomePage.this, orderList);
                                    //set to recyclerview
                                    orders_user_Rv.setAdapter(adapterOrderUser);
                                }
                            }

                            @Override
                            public void onCancelled(@NonNull DatabaseError error) {

                            }
                        });
            }
        }

        @Override
        public void onCancelled(@NonNull DatabaseError error) {

        }
    });

<androidx.recyclerview.widget.RecyclerView
            android:id="@+id/order_userRv"
            android:layout_below="@id/ordersTv"
            android:layout_marginTop="5dp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
            tools:listitem="@layout/row_order_user"/>

public class AdapterOrderUser extends  RecyclerView.Adapter<AdapterOrderUser.HolderOrderUser> {

private Context oContext;
private ArrayList<ModelOrderUser> orderUserList;

public AdapterOrderUser(Context oContext, ArrayList<ModelOrderUser> orderUserList) {
    this.oContext = oContext;
    this.orderUserList = orderUserList;
}

@NonNull
@Override
public HolderOrderUser onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    // inflate layout
    View view = LayoutInflater.from(oContext).inflate(R.layout.row_order_user, parent, false);
    return new HolderOrderUser(view);
}

@Override
public void onBindViewHolder(@NonNull HolderOrderUser holder, int position) {
    //get data
    ModelOrderUser modelOrderUser = orderUserList.get(position);
    String orderId = modelOrderUser.getOrderId();
    String orderBy = modelOrderUser.getOrderBy();
    String orderCost = modelOrderUser.getOrderCost();
    String orderStatus = modelOrderUser.getOrderStatus();
    String orderTime = modelOrderUser.getOrderTime();

    //set data

    holder.amountTv.setText("Amount: Ksh" +orderCost);
    holder.statusTv.setText(orderStatus);
    holder.orderIdTv.setText("OrderID:"+ orderId);
    //change order status color
    if ("In Progress".equals(orderStatus)){
        holder.statusTv.setTextColor(oContext.getResources().getColor(R.color.colorPrimary));
    }else if ("Completed".equals(orderStatus)){
        holder.statusTv.setTextColor(oContext.getResources().getColor(R.color.green));
    }else if ("Cancelled".equals(orderStatus)){
        holder.statusTv.setTextColor(oContext.getResources().getColor(R.color.red));
    }
    //convert timeStamp to proper format
    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(Long.parseLong(orderTime));
    String formattedDate = DateFormat.format("dd/mm/yyyy", calendar).toString();

    holder.dateTv.setText(formattedDate);

}

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

//view holder class
class HolderOrderUser extends RecyclerView.ViewHolder{

    //views of layout
    private TextView orderIdTv, dateTv, amountTv, statusTv;
    public HolderOrderUser(@NonNull View itemView) {
        super(itemView);

        orderIdTv = itemView.findViewById(R.id.orderIdTv);
        dateTv = itemView.findViewById(R.id.orderDateTv);
        amountTv = itemView.findViewById(R.id.orderamountTv);
        statusTv = itemView.findViewById(R.id.orderStatusTv);
    }
}

适配器线路如下所示

private void loadOrders() {
    //init order list
    orderList = new ArrayList<>();
    //get orders
    DatabaseReference ref = FirebaseDatabase.getInstance().getReference("Users");
    ref.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot snapshot) {
            orderList.clear();
            for (DataSnapshot ds: snapshot.getChildren()){
                String uid = ""+ds.getRef().getKey();
                DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Users").child(uid).child("Orders");
                reference.orderByChild("orderBy").equalTo(firebaseAuth.getUid())
                        .addValueEventListener(new ValueEventListener() {
                            @Override
                            public void onDataChange(@NonNull DataSnapshot snapshot) {
                                if (snapshot.exists()){
                                    for (DataSnapshot ds: snapshot.getChildren()){
                                        ModelOrderUser modelOrderUser = ds.getValue(ModelOrderUser.class);

                                        //add to list
                                        orderList.add(modelOrderUser);
                                    }
                                    //setup adapter
                                    adapterOrderUser = new AdapterOrderUser(HomePage.this, orderList);
                                    //set to recyclerview
                                    orders_user_Rv.setAdapter(adapterOrderUser);
                                }
                            }

                            @Override
                            public void onCancelled(@NonNull DatabaseError error) {

                            }
                        });
            }
        }

        @Override
        public void onCancelled(@NonNull DatabaseError error) {

        }
    });

<androidx.recyclerview.widget.RecyclerView
            android:id="@+id/order_userRv"
            android:layout_below="@id/ordersTv"
            android:layout_marginTop="5dp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
            tools:listitem="@layout/row_order_user"/>

public class AdapterOrderUser extends  RecyclerView.Adapter<AdapterOrderUser.HolderOrderUser> {

private Context oContext;
private ArrayList<ModelOrderUser> orderUserList;

public AdapterOrderUser(Context oContext, ArrayList<ModelOrderUser> orderUserList) {
    this.oContext = oContext;
    this.orderUserList = orderUserList;
}

@NonNull
@Override
public HolderOrderUser onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    // inflate layout
    View view = LayoutInflater.from(oContext).inflate(R.layout.row_order_user, parent, false);
    return new HolderOrderUser(view);
}

@Override
public void onBindViewHolder(@NonNull HolderOrderUser holder, int position) {
    //get data
    ModelOrderUser modelOrderUser = orderUserList.get(position);
    String orderId = modelOrderUser.getOrderId();
    String orderBy = modelOrderUser.getOrderBy();
    String orderCost = modelOrderUser.getOrderCost();
    String orderStatus = modelOrderUser.getOrderStatus();
    String orderTime = modelOrderUser.getOrderTime();

    //set data

    holder.amountTv.setText("Amount: Ksh" +orderCost);
    holder.statusTv.setText(orderStatus);
    holder.orderIdTv.setText("OrderID:"+ orderId);
    //change order status color
    if ("In Progress".equals(orderStatus)){
        holder.statusTv.setTextColor(oContext.getResources().getColor(R.color.colorPrimary));
    }else if ("Completed".equals(orderStatus)){
        holder.statusTv.setTextColor(oContext.getResources().getColor(R.color.green));
    }else if ("Cancelled".equals(orderStatus)){
        holder.statusTv.setTextColor(oContext.getResources().getColor(R.color.red));
    }
    //convert timeStamp to proper format
    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(Long.parseLong(orderTime));
    String formattedDate = DateFormat.format("dd/mm/yyyy", calendar).toString();

    holder.dateTv.setText(formattedDate);

}

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

//view holder class
class HolderOrderUser extends RecyclerView.ViewHolder{

    //views of layout
    private TextView orderIdTv, dateTv, amountTv, statusTv;
    public HolderOrderUser(@NonNull View itemView) {
        super(itemView);

        orderIdTv = itemView.findViewById(R.id.orderIdTv);
        dateTv = itemView.findViewById(R.id.orderDateTv);
        amountTv = itemView.findViewById(R.id.orderamountTv);
        statusTv = itemView.findViewById(R.id.orderStatusTv);
    }
}

公共类适配器OrderUser扩展了RecyclerView.Adapter{
私人语境；
私有ArrayList orderUserList；
公共适配器OrderRuser（上下文oContext、ArrayList orderUserList）{
this.oContext=oContext；
this.orderUserList=orderUserList；
}
@非空
@凌驾
public HolderOrderUser onCreateViewHolder（@NonNull ViewGroup父级，int viewType）{
//充气布局
视图=LayoutFlater.from（oContext）.充气（R.layout.row\u order\u user，parent，false）；
返回新的HolderOrderUser（视图）；
}
@凌驾
BindViewHolder上的公共无效（@NonNull HolderOrderUser holder，int位置）{
//获取数据
ModelOrderUser ModelOrderUser=orderUserList.get（位置）；
字符串orderId=modelOrderUser.getOrderId（）；
字符串orderBy=modelOrderUser.getOrderBy（）；
字符串orderCost=modelOrderUser.getOrderCost（）；
字符串orderStatus=modelOrderUser.getOrderStatus（）；
字符串orderTime=modelOrderUser.getOrderTime（）；
//设置数据
holder.amountTv.setText（“金额：Ksh”+订单成本）；
holder.statusTv.setText（订单状态）；
holder.orderIdTv.setText（“OrderID:+OrderID”）；
//更改订单状态颜色
如果（“进行中”。等于（订单状态））{
holder.statusTv.setTextColor（oContext.getResources（）.getColor（R.color.colorPrimary））；
}否则，如果（“已完成”。等于（订单状态））{
holder.statusTv.setTextColor（oContext.getResources（）.getColor（R.color.green））；
}否则，如果（“已取消”。等于（订单状态））{
holder.statusTv.setTextColor（oContext.getResources（）.getColor（R.color.red））；
}
//将时间戳转换为正确的格式
日历=Calendar.getInstance（）；
calendar.setTimeInMillis（Long.parseLong（orderTime））；
字符串formattedDate=DateFormat.format（“dd/mm/yyyy”，calendar）.toString（）；
holder.dateTv.setText（格式化日期）；
}
@凌驾
public int getItemCount（）{
返回orderUserList.size（）；
}
//视图持有者类
类HolderOrderUser扩展了RecyclerView.ViewHolder{
//布局视图
私有文本视图orderIdTv、dateTv、amountTv、statusTv；
public-HolderOrderUser（@NonNull-View-itemView）{
超级（项目视图）；
orderIdTv=itemView.findviewbyd（R.id.orderIdTv）；
dateTv=itemView.findViewById（R.id.orderDateTv）；
amountTv=itemView.findViewById（R.id.orderamountTv）；
statusTv=itemView.findViewById（R.id.orderStatusTv）；
}
}

正如您所看到的，我已将适配器连接到recycler视图，我不知道为什么数据无法显示，也不知道为什么会弹出错误