在列表中获取文档中的所有字段-Firestore Java [英] Get all fields in a document in a list - Firestore Java

问题描述

我正在尝试将所有字段从文档移到ListView.我已经尝试过foreach循环，但无法正常工作.

I am trying to get all fields from a document to a ListView. I have tried foreach loop but it is not working.

dbRef.collection("Shopkeeper Own Shops").document("[e-mail]")
            .get()
            .addOnSuccessListener(new OnSuccessListener<DocumentSnapshot>() {
        @Override
        public void onSuccess(DocumentSnapshot documentSnapshot) {
            // Get all fields to a list
        }
    });

推荐答案

要将文档中所有属性的所有值添加到列表中，请使用以下代码行:

To add all the value of all properties within a document to a list, please use the followig lines of code:

dbRef.collection("Shopkeeper Own Shops").document("[e-mail]").get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
    @Override
    public void onComplete(@NonNull Task<DocumentSnapshot> task) {
        if (task.isSuccessful()) {
            DocumentSnapshot document = task.getResult();
            if (document.exists()) {
                List<String> list = new ArrayList<>();

                Map<String, Object> map = document.getData();
                if (map != null) {
                    for (Map.Entry<String, Object> entry : map.entrySet()) {
                        list.add(entry.getValue().toString());
                    }
                }

                //So what you need to do with your list
                for (String s : list) {
                    Log.d("TAG", s);
                }
            }
        }
    }
});

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