To solve this, you should get the data from the database as a Map
:
yourDocumentReference.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
@Override
public void onComplete(@NonNull Task<DocumentSnapshot> task) {
if (task.isSuccessful()) {
DocumentSnapshot document = task.getResult();
if (document.exists()) {
Map<String, Object> map = document.getData();
if (map.size() == 0) {
Log.d(TAG, "Document is empty!");
} else {
Log.d(TAG, "Document is not empty!");
}
}
}
}
});
To check a document only for existens it doesn't mean that is empty. The document can exist (like in your screenshot) but has no properties set. Because every document in a Cloud Firestore database is a Map, you can use size()
method to see if is empty or not.