Question

我有一个Card对象，其中有一个“兴趣”对象列表。我正在尝试将卡存储在Firestore上，以便以后再取回。但是，每次我成功将“ CArd”存储在数据库中时，我都无法对设备上的每个卡对象进行更改。具体来说，我无法修改其中列表中的每个兴趣。即。我无法向HashMap中的每张卡添加新兴趣：cardNameToCard

有人可以帮助我了解我在做什么错吗？我怀疑CardMap中每张卡的内存指针都在变化。我尝试为每个新列表和每个新卡添加新适配器。我还尝试制作一张重复的卡，然后将该数据传递给函数，然后等待回调。存储数据的MainActivity函数：

` 公共静态MapcardNameToCard = new HashMap <>（）; fs.storeCards（cardName，duplicateCardMapping，new MyCallBack（）{

                    @Override
                    public void onCardStoredCallback(Map<String, Card> returnedCardMap) {

                        //cardNameToCard.putAll(returnedCardMap);
                        for(String cardName:returnedCardMap.keySet()){
                            cardNameToCard.get(cardName).setStoredInterests(returnedCardMap.get(cardName).storedInterests);
                        }

这是一张卡片的样子：

    String userEmailId;
    String cardName;
    List<Interest> storedInterests;
    boolean visible;

这是我在Firestore中的存储功能：它检查Card是否存在于数据库中。如果有，它将更新，否则将创建一个新文档



    //need to confirm if working properly or not!
    public void storeCards(final String cardName, final Map<String,Card>cardNameToCard, final MyCallBack myCallBack) {
        Log.d(TAG,"STORING CARDS");
        FirebaseFirestore db=FirebaseFirestore.getInstance();

        db.collection("cards")
                .whereEqualTo("cardName",cardName)
                .whereEqualTo("userEmailId",Main3Activity.getThisUser().getEmail())
                .get()
                .addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() {
                    @Override
                    public void onSuccess(QuerySnapshot queryDocumentSnapshots) {
                        Set<String> cardNamesUpdated=new HashSet<>();
                        for(QueryDocumentSnapshot documentSnapshot:queryDocumentSnapshots){
                            String idOfThisCard=documentSnapshot.getId();
                            cardNamesUpdated.add((String) documentSnapshot.getData().get("cardName"));
                            Card x=cardNameToCard.get(cardName);
                            List<Interest> interestCurrent=x.getStoredInterests();
                            List<Interest> alternateList=new ArrayList<>();
                            for(Interest i:interestCurrent){
                                if(i.getName().isEmpty()||i.getName()==null){
                                    alternateList.add(new Interest("",cardName));
                                }else {
                                    alternateList.add(i);
                                }
                                Log.d(TAG,"I AM ADDING "+i.getName());
                            }
                            cardNameToCard.get(cardName).storedInterests=alternateList;
                            updateOneCard(idOfThisCard, Objects.requireNonNull(cardNameToCard.get(cardName)).convertToMap(),cardNameToCard,myCallBack);//updating this guy
                        }
                        //cardNameSet.removeAll(cardNamesUpdated);//the guys who are new and need to be added as brand new cards
                        if(queryDocumentSnapshots.size()==0)//if we did not get any result on our search for this card\
                            addNewCard(cardName,cardNameToCard,myCallBack);
                    }
                });

    }

addNewCard和updateOneCard：


    //need to confirm if working properly or not!
    private void addNewCard(final String x, final Map<String, Card> cardNameToCard, final MyCallBack myCallBack) {
        //to ensure that the schema does not change in case of no interests added by user, we will create a blank interest
        if(cardNameToCard.get(x).getStoredInterests().isEmpty()){
            //Main3Activity.cardNameToCard
            Interest blankInterest=new Interest("",x);
            Card cardToReplace=cardNameToCard.get(x);
            cardToReplace.storedInterests=(new ArrayList<Interest>(Arrays.asList(new Interest[]{blankInterest})));
            cardNameToCard.replace(x,cardToReplace);
            Log.d(TAG,"WE HAVE ADDED A BLANK INTEREST IN CARDNAME "+x);
        }
        FirebaseFirestore db=FirebaseFirestore.getInstance();
        db.collection("cards")
                //.add(cardNameToCard.get(x).convertToMap())
                .add(cardNameToCard.get(x).convertToMap())
                .addOnSuccessListener(new OnSuccessListener<DocumentReference>() {
                    @Override
                    public void onSuccess(DocumentReference documentReference) {
                        Log.d(TAG,"WE HAVE ADDED A NEW CARD"+x);
                        myCallBack.onCardStoredCallback(cardNameToCard);
                    }
                });
    }

    private void updateOneCard(String idOfThisCard, final Map<String, Object> data, final Map<String, Card> cardNameToCard,final MyCallBack myCallBack) {
        FirebaseFirestore db=FirebaseFirestore.getInstance();
        db.collection("cards")
                .document(idOfThisCard)
                .set(data)
                .addOnSuccessListener(new OnSuccessListener<Void>() {
                    @Override
                    public void onSuccess(Void aVoid) {
                        Log.d(TAG,"WE HAVE UPDATED AN EXISTING CARD "+data.get("cardName"));
                        myCallBack.onCardStoredCallback(cardNameToCard);
                    }
                });
    }```



Any help would be appreciated!!!

Android：每次将文档存储在Firestore中时，都无法通过RecyclerView修改文档中的列表。有什么问题？

0 个答案: