我已经设法使用notifydatasetchanged不断刷新listview中的数据。但是，每次我添加一组新数据时，前一组数据总是会更改为当前数据。有没有办法在每次“notifydatasetchanged”后保留前一组数据？
这是我的密码：

private ArrayList<Model_inputs> inputsList;
    boolean isActive = false;
    private Adapter_inputs adapter_inputs;

    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Button refresh_btn = view.findViewById(R.id.refresh);

        refresh_btn.setOnClickListener(new View.OnClickListener(){
            public void onClick(View view){

                if(!isActive) {
                    isActive = true;
                    Toast.makeText(getContext(), "Refreshing...", Toast.LENGTH_SHORT).show();
                    newInputs();
                }
                else if(isActive){
                    isActive = false;
                    Toast.makeText(getContext(), "Refreshing Stopped", Toast.LENGTH_SHORT).show();
                }
            }
        });

        inputsList = new ArrayList<>();
        Model_inputs inputs = new Model_inputs("Text1", "Text2", "Text3", "Text4");
        inputsList.add(inputs);
        ListView listView = (ListView) getActivity().findViewById(R.id.InputValue_LV);
        adapter_inputs = new Adapter_inputs(requireActivity(), R.layout.row_inputs, inputsList);
        listView.setAdapter(adapter_inputs);

    }

    public void newInputs(){

        inputsList.add(new Model_inputs("Text1", "Text2", "Text3", "Text4"));
        adapter_inputs.notifyDataSetChanged();

        if (isActive) {
            refresh(1000);
        }
    }

    public void refresh(int milliseconds){
        final Handler handler = new Handler();

        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                newInputs();
            }
        }, milliseconds);
    }