How to display OkHTTP response in TextView?

Question

Android

The problem with threads, since not long ago I started working with android, there were misunderstandings.
To send a Get request, I use the OkHTTP library.
Created a Get.java class:

import okhttp3.Callback;
import okhttp3.OkHttpClient;
 
public class Get {
    private final OkHttpClient client = new OkHttpClient();
 
    public void run(String url, Callback callback) {
 
        okhttp3.Request request = new okhttp3.Request.Builder()
                .url(url)
                .build();
 
        client.newCall(request).enqueue(callback);
    }
}

In MainActivity.java I call a request and try to output:

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
 
import java.io.IOException;
 
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;
 
public class MainActivity extends AppCompatActivity {
    TextView  test123;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        Get test = new Get();
        test123 = (TextView) findViewById(R.id.test);
 
        test.run("https://geocode-maps.yandex.ru/1.x/?geocode=E52.091002%S23.721111",
                new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {
 
                    }
 
                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        @Override
                        public void run() {
 
                        }
                        test123.setText(response.body().string());
                    }
                });
    }
}

log error:

FATAL EXCEPTION: OkHttp Dispatcher
Process: com.d_code.myapplication, PID: 5292
android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:6669)
at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:972)
at android.view.View.requestLayout(View.java:16757)
at android.view. View.requestLayout(View.java:16757)
at android.view.View.requestLayout(View.java:16757)
at android.view.View.requestLayout(View.java:16757)
at android.view.View.requestLayout(View .java:16757)
at android.view.View.requestLayout(View.java:16757)
at android.widget.RelativeLayout.requestLayout(RelativeLayout.java:369)
at android.view.View.requestLayout(View.java:16757)
at android.widget.TextView.checkForRelayout(TextView.java:6781)
at android.widget. TextView.setText(TextView.java:3850)
at android.widget.TextView.setText(TextView.java:3708)
at android.widget.TextView.setText(TextView.java:3683)
at com.d_code.myapplication.MainActivity$1. onResponse(MainActivity.java:33)
at okhttp3.RealCall$AsyncCall.execute(RealCall.java:133)
at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor .java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)

Can anyone help with a solution or radically change the code so that it works?