안드로이드 수업 2일차 -라디오버튼만들기

<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"
    tools:context=".MainActivity">

    <RadioGroup
        android:id="@+id/radioGroup"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <RadioButton
            android:checked="true"
            android:id="@+id/radioButton1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="1" />

        <RadioButton
            android:id="@+id/radioButton2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="2" />

    </RadioGroup>

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:srcCompat="@drawable/a" />

        <ImageView
            android:id="@+id/imageView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:srcCompat="@drawable/b" />

    </FrameLayout>
</LinearLayout>

<MainActivity.java>

package com.example.imageviewapp;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;

public class MainActivity extends AppCompatActivity {

    RadioGroup radioGroup;
    RadioButton radioButton1;
    RadioButton radioButton2;

    ImageView imageView;
    ImageView imageView2;


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

        imageView = findViewById(R.id.imageView);
        imageView2 = findViewById(R.id.imageView2);

        radioButton1 = findViewById(R.id.radioButton1);
        radioButton2 = findViewById(R.id.radioButton2);
        radioGroup = findViewById(R.id.radioGroup);

        imageView.setVisibility(View.VISIBLE);
        imageView2.setVisibility(View.INVISIBLE);


        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                RadioButton select = (RadioButton)findViewById(checkedId);
                switch (select.getId()){
                
                    case R.id.radioButton1:
                        imageView.setVisibility(View.VISIBLE);
                        imageView2.setVisibility(View.INVISIBLE);
                        break;
                        
                    case R.id.radioButton2:
                        imageView2.setVisibility(View.VISIBLE);
                        imageView.setVisibility(View.INVISIBLE);
                        break;
                }
            }
        });
    }
}

 

<결과>

 

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