android - How to add 2 different queries inside an FirestoreRecyclerAdapter?

Question

I have two queries:

Query firstQuery = ref.orderBy("name", Query.Direction.ASCENDING).limit(10);
getData(firstQuery);

Query secondQuery = ref.orderBy("price", Query.Direction.ASCENDING).limit(10);
getMoreData(secondQuery);

The first method looks like this:

private void getData(Query query) {
    firestoreRecyclerOptions = new FirestoreRecyclerOptions.Builder<ModelClass>().setQuery(query, ModelClass.class).build();
    myFirestoreRecyclerAdapter = new MyFirestoreRecyclerAdapter(firestoreRecyclerOptions);
    recyclerView.setAdapter(myFirestoreRecyclerAdapter);
}

And here is the second method.

private void getMoreData(Query query) {
    firestoreRecyclerOptions = new FirestoreRecyclerOptions.Builder<ModelClass>().setQuery(query, ModelClass.class).build();
    myFirestoreRecyclerAdapter = new MyFirestoreRecyclerAdapter(firestoreRecyclerOptions);
    recyclerView.setAdapter(myFirestoreRecyclerAdapter);
}

Both variables are declared as global:

private FirestoreRecyclerOptions<ModelClass> firestoreRecyclerOptions;
private MyFirestoreRecyclerAdapter myFirestoreRecyclerAdapter;

When the app starts, the elements are displayed in the RecyclerView using the first method. What I want to achieve is that on a button click, when the getMoreData() method is triggered to add the result from the second query in the same adapter, ending up having 20 elements. Now, when I click the button, the elements from the second query will override the first ones.

Answer 1

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