Android_Java(7) - RadioBtn

package kr.co.pets;
/*
    수정하시오.
        1) '좋아하는 안드로이드 버전은 어떤건가요?'
        2) '시작함'을 스위치로 변경하시오.
        3) '선택 완료' 대신에, 라디오버튼을 선택할 때마다 즉시 해당 이미지가 나오도록 변경하시오.
        4) 버튼 2개 끝부분에 추가하시오.
            - 종료 => 응용프로그램 종료
            - 처음으로 => 초기화되고 처음화면이 나오게 함
 */
import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    TextView textView1, textView2;
    Switch switchAgree;
    RadioGroup rGroup;
    RadioButton[] radioArray = new RadioButton[3];
    ImageView imagePet;
    Button btnQuit, btnReturn;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
        getSupportActionBar().setIcon(R.drawable.ic_launcher);
        setTitle("안드로이드 사진 보기");

        //위젯을 변수에 대입
        textView1 = findViewById(R.id.textViewSta);
        switchAgree = findViewById(R.id.switchAgree);

        textView2 = findViewById(R.id.textViewCho);
        rGroup = findViewById(R.id.Rgroup);
        radioArray[0] = findViewById(R.id.Rdo100);
        radioArray[1] = findViewById(R.id.Rdo110);
        radioArray[2] = findViewById(R.id.Rdo120);

        btnQuit = findViewById(R.id.BtnQuit);
        btnReturn = findViewById(R.id.BtnReturn);
        imagePet = findViewById(R.id.imageView);

        //Switch가 체크가 되면
        switchAgree.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
                //체크되면 모두 보이도록 설정
                if(switchAgree.isChecked() == true){
                    textView2.setVisibility(View.VISIBLE);
                    rGroup.setVisibility(View.VISIBLE);
                    imagePet.setVisibility(View.VISIBLE);
                    btnQuit.setVisibility(View.VISIBLE);
                    btnReturn.setVisibility(View.VISIBLE);
                }else{
                    textView2.setVisibility(View.INVISIBLE);
                    rGroup.setVisibility(View.INVISIBLE);
                    imagePet.setVisibility(View.INVISIBLE);
                    btnQuit.setVisibility(View.INVISIBLE);
                    btnReturn.setVisibility(View.INVISIBLE);
                }
            }
        });

        //라디오 버튼을 클릭하면, 이미지 뷰를 변경시킴 ==> 배열로 처리함
        final int[] draw = {R.drawable.q10, R.drawable.r11, R.drawable.s12};
        for(int i=0; i<radioArray.length;i++){
            final int index;
            index = i;
            radioArray[index].setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    imagePet.setImageResource(draw[index]);
                }
            });
        }

        //종료 버튼 클릭
        btnQuit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                finish();
            }
        });

        //처음으로 버튼 클릭
        btnReturn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                textView2.setVisibility(View.INVISIBLE);
                rGroup.setVisibility(View.INVISIBLE);
                imagePet.setVisibility(View.INVISIBLE);
                btnQuit.setVisibility(View.INVISIBLE);
                btnReturn.setVisibility(View.INVISIBLE);

                rGroup.clearCheck();
                switchAgree.setChecked(false);

            }
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:padding="20dp"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textViewSta"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="선택을 시작하겠습니까?"
        android:textSize="20dp" />

    <Switch
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/switchAgree"
        android:layout_weight="1"
        android:text="시작함" />

    <TextView
        android:id="@+id/textViewCho"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="선택을 시작하겠습니까?"
        android:textSize="20dp"
        android:visibility="invisible"/>

    <RadioGroup
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/Rgroup"
        android:layout_weight="1"
        android:visibility="invisible">
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/Rdo100"
            android:text="Q(10.0)"/>
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/Rdo110"
            android:text="R(11.0)"/>
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/Rdo120"
            android:text="S(12.0)"/>
    </RadioGroup>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/BtnQuit"
        android:layout_weight="1"
        android:text="종료"
        android:visibility="invisible"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/BtnReturn"
        android:layout_weight="1"
        android:text="처음으로"
        android:visibility="invisible"/>

    <ImageView
        android:layout_width="256dp"
        android:layout_height="256dp"
        android:id="@+id/imageView"
        android:layout_weight="1"
        android:visibility="invisible"/>


</LinearLayout>

<결과 출력>