firestore-fetch-data

firestore-fetch-data.java

// @see Firebase Performance
Traces.start(Traces.COLLABORATORS_TIME);

// Fetch collaborators list from Firestore
Collaborator.getAll(new OnCompleteListener<QuerySnapshot>() {
    @Override
    public void onComplete(@NonNull Task<QuerySnapshot> task) {
        if(task.isSuccessful()) {
            mCollaborators = task.getResult();
            CollaboratorsAdapter.this.notifyDataSetChanged();
        }
        Traces.stop(Traces.COLLABORATORS_TIME);
    }
});

// Collaborator.java#getAll
public static void getAll(OnCompleteListener<QuerySnapshot> listener) {
    FirebaseFirestore.getInstance()
            .collection(FirestoreCollections.RESOURCES).get().addOnCompleteListener(listener);
}