android - AlertDialog, setItems, setSingleChoiceItems, setMultiChoiceItems

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="대화상자" />

</LinearLayout>

package com.example.it.myapplication7_7;

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

//        final Button button1 = (Button) findViewById(R.id.button1);
//        button1.setOnClickListener(new View.OnClickListener() {
//            @Override
//            public void onClick(View v) {
//                final String[] versionArray = new String[] {"진저브레드", "허니콤", "아이스크림"};
//                AlertDialog.Builder dlg = new AlertDialog.Builder(MainActivity.this);
//                dlg.setTitle("좋아하는 버전은?");
//                dlg.setIcon(R.drawable.ic_launcher_background);
//                dlg.setItems(versionArray, new DialogInterface.OnClickListener() {
//                    @Override
//                    public void onClick(DialogInterface dialog, int which) {
//                        button1.setText(versionArray[which]);
//                    }
//                });
//                dlg.setPositiveButton("닫기", null);
//                dlg.show();
//            }
//        });

//        final Button button1 = (Button) findViewById(R.id.button1);
//        button1.setOnClickListener(new View.OnClickListener() {
//            @Override
//            public void onClick(View v) {
//                final String[] versionArray = new String[] {"진저브레드", "허니콤", "아이스크림"};
//                AlertDialog.Builder dlg = new AlertDialog.Builder(MainActivity.this);
//                dlg.setTitle("좋아하는 버전은?");
//                        dlg.setIcon(R.drawable.ic_launcher_background);
//                dlg.setSingleChoiceItems(versionArray, 0, new DialogInterface.OnClickListener() {
//                    @Override
//                    public void onClick(DialogInterface dialog, int which) {
//                        button1.setText(versionArray[which]);
//                    }
//                });
//                dlg.setPositiveButton("닫기", null);
//                dlg.show();
//            }
//        });

        final Button button1 = (Button) findViewById(R.id.button1);
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final String[] versionArray = new String[] {"진저브레드", "허니콤", "아이스크림"};

                final boolean[] checkArray = new boolean[] {true, false, false};
                AlertDialog.Builder dlg = new AlertDialog.Builder(MainActivity.this);
                dlg.setTitle("좋아하는 버전은?");
                dlg.setIcon(R.drawable.ic_launcher_background);
                dlg.setMultiChoiceItems(versionArray, checkArray, new DialogInterface.OnMultiChoiceClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                        button1.setText(versionArray[which]);
                    }
                });
                dlg.setPositiveButton("닫기", null);
                dlg.show();
            }
        });

    }
}