Firebase数据库路径的子项未通过DataSnapshot for loop（Android Studio）连接

Question

我的android项目连接到firebase时出现问题。我想在recyclerview中显示firebase数据库的子元素。为此，我创建了以下代码来将数据保存在arraylist中。但是在附加路径的子项时存在一个问题——代码不会将项添加到列表中：|。对数据库的引用或eventlistener中是否存在错误？

private void loadDataOutfitDetail(String userID, String weatherToday){
        // set the firebase path for loading the images of the clothes
        databaseRefOutfit = FirebaseDatabase.getInstance().getReference(userID + "/" + weather1 + "/ID1" + "/details");

        // clear the list for showing only the filtered weather
        uploadDetails.clear();

        // get data out
        databaseRefOutfit.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                for (DataSnapshot postSnapshot : dataSnapshot.getChildren()){
                    UploadDetails upload = postSnapshot.getValue(UploadDetails.class);
                    // add items to list
                    uploadDetails.add(upload);
                }

                // update the recyclerview
                outfitAdapter.notifyDataSetChanged();
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {
                Toast.makeText(getActivity(), databaseError.getMessage(), Toast.LENGTH_SHORT).show();
            }
        });
    }

我的Firebase数据库具有以下结构：

USERID
   outfit
      weather1
         ID1
            details
               desciption: Here is a description
               name: MyName
            imageUpperPart
               name: image1
         ID2
            details
               description: Here is another description
               name: NewName
            imageUpperPart
               name: image2

如何将details节点的值添加到arraylist uploadDetails？

谢谢你，基维德：）

Answer 1

将引用更改为以下内容：

DatabaseReference ref = FirebaseDatabase.getInstance().getReference(userID).child("outfit").child("weather1").child("ID1").child("details");

引用中缺少节点装备。