CODEWITHSUNDEEP
javaandroidfirebasegoogle-cloud-firestore
Tata Fombar
Tata Fombar

Reputation: 349

collectionGroup() is not public. Cannot be accessed from outside package

I want to use collectionGroup() inside a RecyclerView.ViewHolder to query a subcollection on my FirebaseFirestore and I get an error saying:

'collectionGroup(java.lang.String)' is not public in 'com.google.firebase.firestore.FirebaseFirestore'. Cannot be accessed from outside package

class WallHolder extends RecyclerView.ViewHolder {

        private LinearLayout root, llp, image_layout;
        private RelativeLayout rlp;
        private TextView comment, tv_due, tv_pass;
        private Button btn_play;
        private SeekBar seekBar;
        private ImageView imageView[] = new ImageView[3];

        public WallHolder(@NonNull View itemView) {
            super(itemView);

            root = itemView.findViewById(R.id.list_root);

            llp = root.findViewById(R.id.llp);
            rlp = root.findViewById(R.id.rlp);
            comment = root.findViewById(R.id.tv_cmt);
            image_layout = root.findViewById(R.id.img_layout);

            btn_play = llp.findViewById(R.id.btn_play);

            tv_due = rlp.findViewById(R.id.tv_due);
            tv_pass = rlp.findViewById(R.id.tv_pass);
            seekBar = rlp.findViewById(R.id.seek_bar);

            imageView[0] = image_layout.findViewById(R.id.img_1);
            imageView[1] = image_layout.findViewById(R.id.img_2);
            imageView[2] = image_layout.findViewById(R.id.img_3);
        }


        void setData(final Map<String, Object> post) {

            FirebaseFirestore db = FirebaseFirestore.getInstance();
            final StorageReference storageRef = FirebaseStorage.getInstance().getReference();


            //This is where i get the error
            //db.collectionGroup()
            //


            //This code wasn't working so i want to replace it with the code above
            db.collection("Post")
                    //.document(post.get("post_Id").toString())
                    .document("mnk2EqrVmm3upTFYL4eB")
                    .collection("Post_Images")
                    .get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
                        @Override
                        public void onComplete(@NonNull Task<QuerySnapshot> task) {

                            if (task.isSuccessful()) {
                                final List<Bitmap> list = new ArrayList<>();
                                Toast.makeText(WallActivity.this, String.valueOf(task.getResult().size()), Toast.LENGTH_SHORT).show();

                                for (QueryDocumentSnapshot document : task.getResult()){

                                }
                            } else {

                            }

                        }
                    });
        }
    }

Upvotes: 1

Views: 1130

Answers (1)

Alex Mamo
Alex Mamo

Reputation: 138989

You are getting the following error:

'collectionGroup(java.lang.String)' is not public in 'com.google.firebase.firestore.FirebaseFirestore'. Cannot be accessed from outside package

Because in the earlier versions of Firestore, FirebaseFirestore's collectionGroup(String collectionId) method was defined with no modifier, which means that is only accessible within the same class and within the same package.

Since none of those two conditions is fulfilled, you could access that method outside the class or package. So it means that you are not using the latest version.

Starting with May 8th, 2019, the collectionGroup(String collectionId) is made public, so please your upgrade Firestore dependency to:

implementation 'com.google.firebase:firebase-firestore:19.0.0'

And you'll be able to use that method.

Upvotes: 2

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