如何使用Hashmap在firebase firestore android中添加Map<String、Object>元素？一个商店数据库

implementation 'com.google.firebase:firebase-firestore:23.0.0'

HashMap<String, Object> itemData = new HashMap<>();
itemData.put("name", "商品名称");
itemData.put("price", 9.99);
itemData.put("quantity", 10);
// 添加其他属性...

FirebaseFirestore db = FirebaseFirestore.getInstance();

db.collection("items")
    .add(itemData)
    .addOnSuccessListener(new OnSuccessListener<DocumentReference>() {
        @Override
        public void onSuccess(DocumentReference documentReference) {
            Log.d(TAG, "数据添加成功！文档ID：" + documentReference.getId());
        }
    })
    .addOnFailureListener(new OnFailureListener() {
        @Override
        public void onFailure(@NonNull Exception e) {
            Log.w(TAG, "数据添加失败", e);
        }
    });