리스트-종료버튼 만들기

package com.example.a3;
 
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
 
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
 
public class MainActivity extends AppCompatActivity {
    private String[] items = {"망고쥬스", "토마토쥬스", "포도쥬스"};
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        Button listButton = (Button)findViewById(R.id.listButton);
        listButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                builder.setTitle("리스트");
                builder.setItems(items, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        Toast.makeText(getApplicationContext(), items[i], Toast.LENGTH_SHORT).show();
                    }
                });
                AlertDialog alertDialog = builder.create();
                alertDialog.show();
            }
        });
 
        Button exitButton = (Button)findViewById(R.id.exitButton);
        exitButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                builder.setMessage("정말로 종료하시겠습니까?");
                builder.setTitle("종료 알림창")
                        .setCancelable(false)
                        .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                finish();
                            }
                        })
                        .setNegativeButton("NO", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int i) {
                                dialog.cancel();
                            }
                        });
 
                AlertDialog alert = builder.create();
                alert.setTitle("종료 알림창");
                alert.show();
            }
        });
    }
 
 
}