I'm creating an app on Android Studio with Java and Firestore that lets users make publications and show them on a Fragment with a RecyclerView. The users create a profile (name, avatar) that gets saved in a document named after the user UID inside a collection named "Users". The publications are saved into another collection named "Posts" (title, content, picture, avatar, name).
I wrote two queries, one to get the title and content from the posts from the "Posts" collection, as well as the UID, to then do the other query that gets the name and picture from the poster and then all of those fields go inside a "Post" object and sent to the ArrayList that fills the RecyclerView.
Problem: The posts load perfectly on the RecyclerView but the user picture (the one I'm getting from a different collection) is giving me lots of problems. Sometimes it loads, sometimes it doesn't, and sometimes it loads only for the first post or even the first three posts. I don't understand what could be wrong. I'm posting the code:
private void loadPosts() {
Query postQuery = collectionReferencePosts.orderBy("timestamp", Query.Direction.DESCENDING);
postQuery.get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
@Override
public void onComplete(@NonNull Task<QuerySnapshot> task) {
for (QueryDocumentSnapshot document : task.getResult()) {
Post post = new Post();
post.setTitle(document.getString("title"));
post.setContent(document.getString("content"));
post.setImage(document.getString("image"));
String posterUid = document.getString("useruid");
DocumentReference docRef = collectionReferenceUsers.document(posterUid);
docRef.get().addOnSuccessListener(new OnSuccessListener<DocumentSnapshot>() {
@Override
public void onSuccess(DocumentSnapshot documentSnapshot) {
post.setName(documentSnapshot.getString("name").toString());
post.setAvatar(documentSnapshot.getString("image").toString());
}
});
postList.add(post);
postAdapter.notifyDataSetChanged();
}
}
});
}
