public void listenState()

in firestore/app/src/main/java/com/google/example/firestore/DocSnippets.java [829:855]

22 lines of code
5 McCabe index (conditional complexity)


    public void listenState() {
        // [START listen_state]
        db.collection("cities")
                .whereEqualTo("state", "CA")
                .addSnapshotListener(new EventListener<QuerySnapshot>() {
                    @Override
                    public void onEvent(@Nullable QuerySnapshot snapshots,
                                        @Nullable FirebaseFirestoreException e) {

                        if (e != null) {
                            Log.w(TAG, "listen:error", e);
                            return;
                        }

                        for (DocumentChange dc : snapshots.getDocumentChanges()) {
                            if (dc.getType() == Type.ADDED) {
                                Log.d(TAG, "New city: " + dc.getDocument().getData());
                            }
                        }

                        if (!snapshots.getMetadata().isFromCache()) {
                            Log.d(TAG, "Got initial state.");
                        }
                    }
                });
        // [END listen_state]
    }