Android Studio를 활용한 안드로이드 프로그래밍 연습문제 322p 6번 문제

MainActivity.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"
    tools:context=".MainActivity">


    <RadioGroup
        android:id="@+id/gr"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <RadioButton
            android:id="@+id/rd1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="강아지"/>
        <RadioButton
            android:id="@+id/rd2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="고양이"/>
        <RadioButton
            android:id="@+id/rd3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="토끼"/>
        <RadioButton
            android:id="@+id/rd4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="말"/>

    </RadioGroup>
    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="그림보기"/>
</LinearLayout>

JAVA

package com.example.a322p6;

import android.app.Dialog;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Switch;

public class MainActivity extends AppCompatActivity {

    RadioGroup rg;
    Button btn;
    ImageView img;

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

        btn = (Button) findViewById(R.id.btn);
        rg = (RadioGroup) findViewById(R.id.gr);


        btn.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                AlertDialog.Builder dlg = new AlertDialog.Builder(MainActivity.this);
                View  dlgView = View.inflate(MainActivity.this,R.layout.dialog,null);

                img = (ImageView) dlgView.findViewById(R.id.imageView1);
                dlg.setView(dlgView);

                switch (rg.getCheckedRadioButtonId())
                {
                    case R.id.rd1:
                        dlg.setTitle("강아지");
                        img.setImageResource(R.mipmap.ic_launcher_round);
                        break;
                    case R.id.rd2:
                        dlg.setTitle("고양이");
                        img.setImageResource(R.mipmap.ic_launcher);
                        break;
                    case R.id.rd3:
                        dlg.setTitle("토끼");
                        img.setImageResource(R.drawable.ic_launcher_foreground);
                        break;
                    case R.id.rd4:
                        dlg.setTitle("말");
                        img.setImageResource(R.drawable.ic_launcher_background);
                        break;
                }

                dlg.setPositiveButton("닫기",null);
                dlg.show();
            }
        });
    }
}

dialog.XML

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:src="@mipmap/ic_launcher"
        />
</LinearLayout>