реселлер просмотр чата с нумерацией страниц сверху в андроид

Question

Я работаю над привратником и плоским пользовательским чатом, все хорошо, когда я загружаю больше из нумерации повторных просмотров. мои первые данные разбивки на страницы (загрузка 20 за раз) работают нормально, но при загрузке большего количества предыдущего списка (загрузка 20 за второй раз) данные объединяются со списком, и размер списка равен 30.

Это мой код здесь,

public class GatekeeperInfoActivity  extends BaseActivity implements View.OnClickListener , MyComplaintListner  {
private RecyclerView mRecyclerView;
private GateInfoAdapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
private List<GateInfoPojo> mList;
Context ctx;
String visitor_id,id,cid;
M_Shared_Pref m_shared_pref;
ImageView back_button, img;
private MyDialog dialog;
TextView complaint,subject,msg,from_name_txt;
ImageView attach;
String from_id,from_name,from_mobile;
String id_rwa,new_id;
public static final int DISMISS_TIMEOUT = 2000;
LinearLayout ll_no_data;

int limit =0;
int limit_refresh;
static int nums;
private appconfig.EndlessRecyclerOnScrollListener scrollListener;
LinearLayoutManager linearLayoutManager;
public int overallXScrol = 0;
Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.rwa_view_info);
    ctx = GatekeeperInfoActivity.this;

    dialog = new MyDialog(this);
    m_shared_pref = new M_Shared_Pref(GatekeeperInfoActivity.this);
    visitor_id = m_shared_pref.getPrefranceStringValue(App_Info.Visitor_ID);
    id = m_shared_pref.getPrefranceStringValue(App_Info.Flat_User_Id);
    cid = m_shared_pref.getPrefranceStringValue(App_Info.Flat_User_Id_cid);

    Bundle bundle = this.getIntent().getExtras();
    from_id = bundle.getString("id");
    from_name = bundle.getString("name");
    from_mobile = bundle.getString("mobile");



    id_rwa = getIntent().getStringExtra("id_rwa");

    if (from_id != null && !from_id.isEmpty() && !from_id.equals("null"))
    { new_id = from_id; }

    else{ new_id = id_rwa; }
    System.out.println("check:check"+from_id+":"+id_rwa);

    ///// using this   new_id

    mList = new ArrayList<GateInfoPojo>();
    mRecyclerView = findViewById(R.id.my_recycler_view);

    mRecyclerView.setHasFixedSize(true);
    mLayoutManager = new LinearLayoutManager(this);
    linearLayoutManager = new LinearLayoutManager(this);
    mRecyclerView.setLayoutManager(linearLayoutManager);
    mAdapter = new GateInfoAdapter(mList, ctx);

    button = findViewById(R.id.button);
    ll_no_data = findViewById(R.id.ll_no_data);


    mAdapter.setMyClickListener(this);
    mRecyclerView.setAdapter(mAdapter);


    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            limit_refresh = nums+limit;
            limit = limit_refresh;
            if(nums>=20){
                //  item_progress_bar.setVisibility(View.VISIBLE);
                InfoJson();
            }
        }
    });




    img = findViewById(R.id.pic);
    from_name_txt = findViewById(R.id.from_name_txt);

    attach = findViewById(R.id.attach);
    msg = findViewById(R.id.msg);
    complaint = findViewById(R.id.complaint);
    subject = findViewById(R.id.subject);

    back_button = findViewById(R.id.back_button);
    back_button.setOnClickListener(this);
    attach.setOnClickListener(this);

    if(NetWorkCheck.checkConnection(GatekeeperInfoActivity.this)){
        mList.clear();
        InfoJson();
    }
    else{
        TastyToast.makeText(getApplicationContext(), "Internet connection is disable", TastyToast.LENGTH_LONG, TastyToast.WARNING);
    }

}



@Override
public void onClick(View v) {
    switch (v.getId()){
        case R.id.back_button:
            finish();
            break;


        case R.id.attach:
            if(msg.getText().toString().length()>0){
                submitReply(msg.getText().toString(),new_id);
            }
            else{
                TastyToast.makeText(getApplicationContext(), "Enter Message", TastyToast.LENGTH_LONG, TastyToast.INFO);

            }
            break;
    }
}


public void InfoJson() {
    dialog.ShowProgressDialog();
    RequestQueue requestQueue = Volley.newRequestQueue(this);
    StringRequest stringRequest = new StringRequest(Request.Method.POST, Constant.Base_Url+"AllChatWithUser.php?", new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            try {
                dialog.CancelProgressDialog();

                JSONObject obj = new JSONObject(response);
                String error = obj.getString("error");


                nums = obj.getInt("nums");
                System.out.println("limit_limit_num"+nums);
                if(nums>=1) {
                    if (error.equals("true")) {
                        from_name_txt.setText("GateKeeper : " + obj.getString("names"));
                        JSONArray tower = obj.getJSONArray("Flat");

                        for (int i = 0; i < tower.length(); i++) {
                            JSONObject jsonnew = tower.getJSONObject(i);

                            GateInfoPojo actor = new GateInfoPojo();
                            String id = jsonnew.getString("id");
                            String Reply_From = jsonnew.getString("reply_from");
                            String message = jsonnew.getString("message");
                            String reply_date = jsonnew.getString("send_time");
                            String usertype = jsonnew.getString("usertype");

                            actor.setId(id);
                            actor.setReply_from(Reply_From);
                            actor.setMessage(message);
                            actor.setSend_time(reply_date);
                            actor.setUsertype(usertype);

                            if(limit==0){
                                mList.add(actor);

                            }

                            else{
                                mList.add(0,actor);
                            }

                            mAdapter.notifyDataSetChanged();
                            mRecyclerView.getLayoutManager().scrollToPosition(nums - 1);
                        }


                    }
                }
                else
                {
                    mRecyclerView.setVisibility(View.GONE);
                    ll_no_data.setVisibility(View.VISIBLE);
                    //  TastyToast.makeText(getApplicationContext(),  obj.getString("msg"), TastyToast.LENGTH_LONG, TastyToast.ERROR);
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d(TAG, "Error: " + error.getMessage());
            dialog.CancelProgressDialog();
        }
    }) {
        @Override
        protected Map<String, String> getParams() {
            Map<String, String> params = new HashMap<>();
            params.put("empid", new_id);
            params.put("fid", id);
            params.put("usertype", "FlatUser");
            params.put("limit", String.valueOf(limit));
            Log.e("params", String.valueOf(params));
            return params;
        }
    };

    requestQueue.add(stringRequest);
}

@Override
public void onItemClick(View v, Object bean, String feed, String rating,String comp_spinner) {
    String complaint_id = ((GateInfoPojo) bean).getId();
    // submitComplaintInfo(complaint_id,feed,rating,comp_spinner);
}

@Override
public void onItemClickActivity(View v, Object bean) {
    String complaint_id = ((GateInfoPojo) bean).getId();
}

public void submitReply(final String msg1,final String new_id) {
    dialog.ShowProgressDialog();
    RequestQueue requestQueue = Volley.newRequestQueue(this);
    StringRequest stringRequest = new StringRequest(Request.Method.POST, Constant.Base_Url+"ChatWithUser.php?", new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            try {
                dialog.CancelProgressDialog();
                JSONObject obj = new JSONObject(response);
                String error = obj.getString("error");

                if (error.equals("true"))
                {
                    //  TastyToast.makeText(getApplicationContext(),  obj.getString("msg"), TastyToast.LENGTH_LONG, TastyToast.SUCCESS);
                    msg.setText("");
                    InfoJson();
                    mList.clear();
                }
                else
                {
                    TastyToast.makeText(getApplicationContext(),  obj.getString("msg"), TastyToast.LENGTH_LONG, TastyToast.ERROR);
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d(TAG, "Error: " + error.getMessage());
            dialog.CancelProgressDialog();
        }
    }) {
        @Override
        protected Map<String, String> getParams() {
            Map<String, String> params = new HashMap<>();
            params.put("fid", id);
            params.put("empid", new_id);
            params.put("usertype", "FlatUser");
            params.put("message", msg1);
            Log.e("params", String.valueOf(params));
            return params;
        }
    };

    requestQueue.add(stringRequest);
}
}

Выше приведен способ загрузки данных, полученных из веб-службы, в адаптер.

Вот мой API: http://ayonvisitorbook.com/json/AllChatWithUser.php?empid=6&fid=2&usertype=FlatUser&limit=0

http://ayonvisitorbook.com/json/AllChatWithUser.php?empid=6&fid=2&usertype=FlatUser&limit=20 Заранее большое спасибо.