I'm using this query for the recycler view:
private void load() {
list.clear();
Query query = firebaseFirestore.collection(collection_name).orderBy("time", Query.Direction.DESCENDING);
query.addSnapshotListener(new EventListener<QuerySnapshot>() {
@Override
public void onEvent(@Nullable QuerySnapshot queryDocumentSnapshots, @Nullable FirebaseFirestoreException e) {
if (queryDocumentSnapshots.size() == 0) {
noDataText.setVisibility(View.VISIBLE);
} else {
noDataText.setVisibility(View.INVISIBLE);
/*
for (DocumentChange documentChange: queryDocumentSnapshots.getDocumentChanges()) {
if (documentChange.getType() == DocumentChange.Type.ADDED) {
String documentID = documentChange.getDocument().getId();
Data data = documentChange.getDocument().toObject(Data.class).withId(documentID);
list.add(data);
recyclerAdapter.notifyDataSetChanged();
} else if (documentChange.getType() == DocumentChange.Type.MODIFIED) {
String documentID = documentChange.getDocument().getId();
Data data = documentChange.getDocument().toObject(Data.class).withId(documentID);
if (documentChange.getOldIndex() == documentChange.getNewIndex()) {
// Item changed but remained in same position
list.set(documentChange.getOldIndex(), data);
recyclerAdapter.notifyItemChanged(documentChange.getOldIndex());
} else {
// Item changed and changed position
list.remove(documentChange.getOldIndex());
list.add(documentChange.getNewIndex(), data);
recyclerAdapter.notifyItemMoved(documentChange.getOldIndex(), documentChange.getNewIndex());
}
recyclerAdapter.notifyDataSetChanged();
} else if (documentChange.getType() == DocumentChange.Type.REMOVED) {
list.remove(documentChange.getOldIndex());
recyclerAdapter.notifyItemRemoved(documentChange.getOldIndex());
}
}
*/
for (DocumentChange documentChange : queryDocumentSnapshots.getDocumentChanges()) {
if (documentChange.getType() == DocumentChange.Type.ADDED) {
String documentID = documentChange.getDocument().getId();
Data data = documentChange.getDocument().toObject(Data.class).withId(documentID);
list.add(data);
recyclerAdapter.notifyDataSetChanged();
} else if (documentChange.getType() == DocumentChange.Type.MODIFIED) {
String documentID = documentChange.getDocument().getId();
Data data = documentChange.getDocument().toObject(Data.class).withId(documentID);
list.remove(data);
list.clear();
list.add(data);
recyclerAdapter.notifyDataSetChanged();
} else if (documentChange.getType() == DocumentChange.Type.REMOVED) {
String documentID = documentChange.getDocument().getId();
Data data = documentChange.getDocument().toObject(Data.class).withId(documentID);
list.remove(data);
recyclerAdapter.notifyDataSetChanged();
}
}
}
}
});
}
You will notice that there are 2 for() loops. The first is commented so for sure it will not affect the code. And the other which is being used right now.
The problem is that when there is only 1 document in firestore and when I delete that document, the textView is visible when this queryDocumentSnapshots.size() == 0 is reached. But the the document deleted is still shown in the view.
I tried the solution given here but nothing has changed.
What's the problem?
