FireStore无法调用API回调

Question

我调用了以下方法，但是我看不到任何回叫。

 Log.d(TAG,"adding to firebase");
        // Create a new user with a first and last name
        Map<String, Object> user = new HashMap<>();
        user.put("first", "rambo");
        user.put("last", "Lovelace");
        user.put("born", 1815);


db.collection("aks")
                .add(user)
                .addOnSuccessListener(new OnSuccessListener<DocumentReference>() {
                    @Override
                    public void onSuccess(DocumentReference documentReference) {
                        Log.d(FIRE_TAG, "akshay:DocumentSnapshot added with ID: " + documentReference.getId());
                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        Log.d(FIRE_TAG, "akshay:Error adding document", e);
                    }
                })
                .addOnCanceledListener(new OnCanceledListener() {
                    @Override
                    public void onCanceled() {
                        Log.w(FIRE_TAG,"akshayoncancel listner");
                    }
                })
                .addOnCompleteListener(new OnCompleteListener<DocumentReference>() {
                    @Override
                    public void onComplete(@NonNull Task<DocumentReference> task) {
                        Log.w(FIRE_TAG,"on completed listner");
                    }
                });

Log.d（TAG，“ done”）;

我看到控制台上印有“添加到firebase”和“完成”，但是没有调用成功/失败回调。为什么这样？