activity_main.xml

<?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:orientation="vertical"

android:padding="20dp">

<TextView

android:id="@+id/Text1"

android:layout_weight="1"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="선택을 시작하시겠습니까?"

android:textSize="20dp"/>

<CheckBox

android:id="@+id/ChkAgree"

android:layout_weight="1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="시작"/>

<TextView

android:id="@+id/Text2"

android:layout_weight="1"

android:layout_height="wrap_content"

android:layout_width="wrap_content"

android:text="좋아하는 동물이 무엇인가요?"

android:textSize="20dp"

android:visibility="invisible"/>

<RadioGroup

android:id="@+id/Rgroup1"

android:layout_weight="1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:visibility="invisible">

<RadioButton

android:id="@+id/RdoDog"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="강아지"/>

<RadioButton

android:id="@+id/RdoCat"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="고양이"/>

<RadioButton

android:id="@+id/RdoRabbit"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="토끼"/>

</RadioGroup>

<Button

android:id="@+id/BtnOK"

android:layout_weight="1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="선택완료"

android:visibility="invisible"/>

<ImageView

android:id="@+id/ImgPet"

android:layout_weight="1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:visibility="invisible"/>

</LinearLayout>

MainActivity.java

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Color;

import android.graphics.Typeface;

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.TextView;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

TextView text1, text2;

CheckBox chkAgree;

RadioGroup rGroup;

RadioButton rdoDog, rdoCat, rdoRabbit;

Button btnOK;

ImageView imgPet;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

setTitle("애완동물 사진");

text1=(TextView)findViewById(R.id.Text1);

text2=(TextView)findViewById(R.id.Text2);

chkAgree=(CheckBox)findViewById(R.id.ChkAgree);

rGroup=(RadioGroup)findViewById(R.id.Rgroup1);

rdoDog=(RadioButton)findViewById(R.id.RdoDog);

rdoCat=(RadioButton)findViewById(R.id.RdoCat);

rdoRabbit=(RadioButton)findViewById(R.id.RdoRabbit);

btnOK=(Button)findViewById(R.id.BtnOK);

imgPet=(ImageView)findViewById(R.id.ImgPet);

chkAgree.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

@Override

public void onCheckedChanged(CompoundButton compoundButton, boolean b) {

if(chkAgree.isChecked()==true){

text2.setVisibility(View.VISIBLE);

rGroup.setVisibility(View.VISIBLE);

btnOK.setVisibility(View.VISIBLE);

imgPet.setVisibility(View.VISIBLE);

}else{

text2.setVisibility(View.INVISIBLE);

rGroup.setVisibility(View.INVISIBLE);

btnOK.setVisibility(View.INVISIBLE);

imgPet.setVisibility(View.INVISIBLE);

}

});

btnOK.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

switch (rGroup.getCheckedRadioButtonId()){

case R.id.RdoDog:

imgPet.setImageResource(R.drawable.dog);

break;

case R.id.RdoCat:

imgPet.setImageResource(R.drawable.cat);

break;

case R.id.RdoRabbit:

imgPet.setImageResource(R.drawable.rabbit);

break;

default:

Toast.makeText(getApplicationContext(), "먼저 동물을 선택하세요!", Toast.LENGTH_SHORT).show();

}

});

}

Picture_Viewer