永不结束列表适配器列表视图

Question

看完一篇教程后，我创建了一个永无止境的列表视图适配器视图。我成功实现了它。但是所提出的问题假设最初我的数据库中只有14个列表。那么我将如何处理呢？在排序中，我不想重复我的列表。在我目前的情况下，我知道我在这里丢失了一些东西。但是我在这里想念的地方找不到它吗？

我的代码是：

public void getUserList(final SwipeMenuListView listView){
    final ProgressDialog loading = ProgressDialog.show(this, "", "Downloading...", false, false);
    StringRequest stringRequest = new StringRequest(Request.Method.GET, ServerLinks.USERLIST+"/" + userID, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            try {
                JSONObject object = new JSONObject(response);
                int responseCode = object.getInt("code");
                LayoutInflater li = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                fview = li.inflate(R.layout.footer_view,null);
                mhandler = new myHandler();
                ArrayList<Model> POIListUser = new ArrayList<>();
                if (responseCode == 200) {
                    JSONArray obj = object.getJSONArray("data");
                    indexMapping = new HashMap<>();
                    idMapping = new HashMap<>();
                    int ListLength = obj.length();
                    for (int k = 0; k < ListLength; k++) {
                        String jsonList = obj.getString(k);
                        JSONObject objValues = new JSONObject(jsonList);
                        String POIId = objValues.getString("id");
                        String POIName = objValues.getString("name");
                        String POIAddress = objValues.getString("address");
                        String POILat = objValues.getString("latitude");
                        String POILong = objValues.getString("longitude");
                        String POIImage = objValues.getString("image");
                        String POICategory = objValues.getString("category");
                        String POICreatedDate = objValues.getString("created_at");
                        indexMapping.put(k,POIId);
                        idMapping.put(POIId,POIName);
                        POIListUser.add(new Model(R.drawable.sample,POIName,POIAddress,POILat,POILong,POICategory,POICreatedDate));
                    }
                    POIListAdapter = new ListAdaper(POIListActivity.this,POIListUser);
                    loading.dismiss();
                    listView.setAdapter(POIListAdapter);

                    listView.setOnScrollListener(new AbsListView.OnScrollListener() {
                        @Override
                        public void onScrollStateChanged(AbsListView view, int scrollState) {

                        }

                        @Override
                        public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
                            if(view.getLastVisiblePosition() == totalItemCount - 1 && listView.getCount() >= 10 && !isLoading){
                                Thread thread = new ThreadGetMoreData();
                                thread.start();
                            }
                        }
                    });

                } else if(responseCode == 600){
                    preferences.edit().clear().apply();
                    startActivity(new Intent(getApplicationContext(), LoginActivity.class));
                    finish();
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            loading.dismiss();
            Log.d(TAG, "onErrorResponse: " + error.getMessage());
            Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_SHORT).show();
        }
    }){
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String, String> params = new HashMap<String, String>();
            params.put("Content-Type", "application/json");
            params.put("token", OAuth);
            params.put("x-api-key", ServerLinks.API_KEY);
            return params;
        }
    };;

    int socketTimeout = 30000;
    RetryPolicy policy = new DefaultRetryPolicy(socketTimeout,
            DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
            DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);

    stringRequest.setRetryPolicy(policy);

    RequestQueue requestQueue = Volley.newRequestQueue(this);
    requestQueue.add(stringRequest);
}

AND要在线程中获取更多数据，

public class  myHandler extends Handler {
    @Override
    public void handleMessage(Message msg) {
        switch (msg.what){
            case 0:
                listView.addFooterView(fview);
                break;
            case 1:
                ((ListAdaper) POIListAdapter).addListIntemAdapter((ArrayList<Model>)msg.obj);
                listView.removeFooterView(fview);
                isLoading = false;
                break;
                default:
                    break;

        }
        super.handleMessage(msg);
    }
}

private ArrayList<Model> getMoreData() {
    ArrayList<Model> lst = new ArrayList<>();
    lst.add(new Model(R.drawable.sample,"Some Company","Some Address","89.86876","78.876478","Bar","24-874-7873"));
    return lst;
}
public class ThreadGetMoreData extends Thread {
    @Override
    public void run() {
        mhandler.sendEmptyMessage(0);
        ArrayList<Model> lstResult = getMoreData();
        try {
            Thread.sleep(7000);
        } catch (Exception e){
            Log.e(TAG,e.getMessage());
        }

        Message msg = mhandler.obtainMessage(1,lstResult);
        mhandler.sendMessage(msg);

        super.run();
    }
}

任何帮助将不胜感激。