firestore获取具有更多子集数量的五个文档

CollectionReference collectionRef = db.collection("your_collection");  // 替换为你的集合名称

Query query = collectionRef.orderBy("subset_count", Query.Direction.DESCENDING).limit(5);

query.get()
    .addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
        @Override
        public void onComplete(@NonNull Task<QuerySnapshot> task) {
            if (task.isSuccessful()) {
                for (QueryDocumentSnapshot document : task.getResult()) {
                    // 处理每个文档
                    System.out.println(document.getId() + " => " + document.getData());
                }
            } else {
                // 处理错误
                Log.d(TAG, "Error getting documents: ", task.getException());
            }
        }
    });