How to get data from fields, not entire document. Firestore

Question

I am trying to get data from fields on my firebase firestore, but not the whole document. Fields that i want

Here is my code that get the whole document.

db.collection("Reminder").get()
            .addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() {
                @Override
                public void onSuccess(QuerySnapshot queryDocumentSnapshots) {
                    if (!queryDocumentSnapshots.isEmpty()) {
                        List<DocumentSnapshot> list = queryDocumentSnapshots.getDocuments();

                        for (DocumentSnapshot d : list) {
                            dbReminder p = d.toObject(dbReminder.class);
                            p.setId(d.getId());
                            remtasklist.add(p);
                        }
                        adapter.notifyDataSetChanged();

                    }
                }
            });

Thanks in advance. Edit: I updated with the collection pic. Collection

Please show you firebase collection a bit more in that screenshot — Manoj Perumarath, Mar 21 '19 at 15:40
There is no API to get only a specific field. You must read the entire document to get any field in that document. — Doug Stevenson, Mar 21 '19 at 15:41
T@DougStevenson This is an android related question, not a swift one., how can it be a duplicate. — Manoj Perumarath, Mar 21 '19 at 15:52
You need to query the collection and get the specific user you need — Manoj Perumarath, Mar 21 '19 at 15:54

score 0 · Accepted Answer · answered Mar 21 '19 at 15:41

0

You can get specific fields from the documentSnapshot.

 String location = documentSnapshot.getString("inLocation");
 String time = documentSnapshot.getString("time");//assuming time here is string
 String title = documentSnapshot.getString("title");

answered Mar 21 '19 at 15:41

bensadiku

436
3
15

If you don't want to use loops, you have to write your query better `db.collection("Reminder").document("mydocumenthere");`. This way, you can directly get the fields from the document snapshot. – bensadiku Mar 21 '19 at 16:01
ok thanks it works for now, thank you again – Naphussorn Kaibutr Mar 21 '19 at 16:24

How to get data from fields, not entire document. Firestore

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