我想獲得如下圖所示的鍵值。我正在使用 firebase 回收器適配器來檢索來自鍵的數據，但現在我想獲取鍵值?，F在我正在使用的代碼僅檢索數據 this 。 private void setFirebaseRecyclerAdapterKarangan() {        firebaseRecyclerOptionsKarangan = new FirebaseRecyclerOptions.Builder<UserAlphaKaranganClick>()                .setQuery(databaseReference.child("userAlphaKaranganClick").child(userUid), UserAlphaKaranganClick.class)                .build();    firebaseRecyclerAdapterKarangan = new FirebaseRecyclerAdapter<UserAlphaKaranganClick, UserAlphaActivityLogKaranganViewHolder>(firebaseRecyclerOptionsKarangan) {        @Override        protected void onBindViewHolder(@NonNull final UserAlphaActivityLogKaranganViewHolder holder, final int position, @NonNull final UserAlphaKaranganClick model) {            //We need to convert to become string since it is from long            holder.getTextViewClick().setText(String.valueOf(model.getClick()));            holder.getTextViewLike().setText(String.valueOf(model.getLike()));        }        @NonNull        @Override        public UserAlphaActivityLogKaranganViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {            View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.user_alpha_activity_log_karangan_item, viewGroup, false);            return new UserAlphaActivityLogKaranganViewHolder(view);        }    };    //Display    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getApplicationContext());    linearLayoutManager.setStackFromEnd(true);    linearLayoutManager.setReverseLayout(true);    firebaseRecyclerAdapterKarangan.startListening();    recyclerView2.setAdapter(firebaseRecyclerAdapterKarangan);    recyclerView2.setLayoutManager(linearLayoutManager);}爪哇安卓火力基地