从另一个布局访问 TextView

如何解决从另一个布局访问 TextView

我想显示一个对话框（其中包含另一个资源文件的外观）但根据 JSON 文件更改（TextView 的）名称，但我无权访问 java 的其他资源文件布局从第一个活动

userName 在文本视图的 2eme 布局中定义，但我没有任何访问权限

package com.example.randomchatonline;

import android.app.Dialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class page1 extends AppCompatActivity {
    String userNameReceive = null;
    String userNameRandom = null;
    Button contactBtn,searchBtn;
    String x1 = null,x2 = null;
    private String URL_DATA="http://192.168.0.104/PHP/(Model)searchRandom.inc.php/?userName=";


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_page1);
        Bundle userNameSend = this.getIntent().getExtras();
        if(userNameSend != null){
            userNameReceive = userNameSend.getString("userNameSend"); }

        ((myUser) this.getApplication()).setNameOfUser(userNameReceive);
        contactBtn = (Button) findViewById(R.id.contactBtn);
        searchBtn = (Button) findViewById(R.id.searchBtn);

        URL_DATA=URL_DATA + userNameReceive;

        contactBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String userNameSend = userNameReceive;
                Intent intent = new Intent(page1.this,contactList.class);
                startActivity(intent);

            }
        });

        searchBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {





                MyCustomAlertDialog();
            }
        });

    }




    public void MyCustomAlertDialog(){
        final Dialog MyDialog = new Dialog(page1.this);
        MyDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        MyDialog.setContentView(R.layout.customdialog);


        StringRequest stringRequest = new StringRequest(Request.Method.GET,URL_DATA,new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        //System.out.println(lastMsgId);
                        try {
                            JSONObject jsonObject = new JSONObject(response);
                            JSONArray array = jsonObject.getJSONArray("res");
                            String userNameToFind;
                            String gender;

                            //for (int i = 0; i < array.length(); i++) {
                            JSONObject o = array.getJSONObject(0);

                            userNameToFind = o.getString("userNameToFind");
                            gender = o.getString("gender");

                            userName = userNameToFind; //userName is defined in a othel xml file
                            

                            //} //endForLoop


                        } catch (JSONException e) {
                            e.printStackTrace();
                        }

                    }

                },new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Toast.makeText(getApplicationContext(),"Error",Toast.LENGTH_LONG).show();
                    }
                });


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



        Button chat = (Button)MyDialog.findViewById(R.id.chat);
        Button next = (Button)MyDialog.findViewById(R.id.next);

        chat.setEnabled(true);
        next.setEnabled(true);



        chat.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getApplicationContext(),"go to chat",Toast.LENGTH_LONG).show();
          
            }
        });


        next.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                MyDialog.cancel();
                MyCustomAlertDialog();
            }
        });
        MyDialog.show();
    }



}