android - 체크박스 이벤트 처리, 라디오 버튼 선택 후, 버튼 클릭하면 이미지뷰에 이미지 나오게 하기 (TextView, CheckBox, RadioGroup, RadioButton, Button, ImageView, setOnCheckedChangeListener, setOnClickListener)

파일명 : activity_main.xml

<?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="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="20dp" >

    <TextView
        android:id="@+id/Text1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="선택을 시작하겠습니까?"
        android:textSize="20dp" />

    <CheckBox
        android:id="@+id/ChkAgree"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="시작함" />

    <TextView
        android:id="@+id/Text2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="좋아하는 애완동물은?"
        android:textSize="20dp"
        android:visibility="invisible" />

    <RadioGroup
        android:id="@+id/Rgroup1"
        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_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="선택 완료"
        android:visibility="invisible" />

    <ImageView
        android:id="@+id/ImgPet"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="invisible" />

</LinearLayout>

파일명 : MainActivity.java

package com.example.it.myapplication;

import android.support.v7.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.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    TextView text1, text2;
    CheckBox chkAgree;
    RadioGroup rGroup1;
    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 보기");

        // 위젯을 변수에 대입
        text1 = (TextView) findViewById(R.id.Text1);
        chkAgree = (CheckBox) findViewById(R.id.ChkAgree);

        text2 = (TextView) findViewById(R.id.Text2);
        rGroup1 = (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);

        // 체크박스의 체크가 변경되면
        chkAgree.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
                // 체크되면 모두 보이도록 설정
                if (chkAgree.isChecked() == true) {
                    text2.setVisibility(android.view.View.VISIBLE);
                    rGroup1.setVisibility(android.view.View.VISIBLE);
                    btnOK.setVisibility(android.view.View.VISIBLE);
                    imgPet.setVisibility(android.view.View.VISIBLE);
                } else {
                    text2.setVisibility(android.view.View.INVISIBLE);
                    rGroup1.setVisibility(android.view.View.INVISIBLE);
                    btnOK.setVisibility(android.view.View.INVISIBLE);
                    imgPet.setVisibility(android.view.View.INVISIBLE);
                }
            }
        });

        // 선택확인 버튼을 클릭하면
        btnOK.setOnClickListener(new View.OnClickListener() {
            public void onClick(View arg0) {

                switch (rGroup1.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(), "동물 먼저 선택하세요", Toast.LENGTH_SHORT)
                                .show();
                }
            }
        });

    }
}

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