안드로이드 스튜디오 : 앱 프로그래밍 방과후 Chapter 6_4

<?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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

   <RadioButton
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:text="red"
       android:textSize="25dp"
       android:id="@+id/button1"
       android:onClick="onClick1"/>

    <RadioButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="blue"
        android:textSize="25dp"
        android:id="@+id/button2"
        android:onClick="onClick_2"/>

</LinearLayout>

package kr.hs.dsm.appb.ch_6_5;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.RadioButton;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

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

    public void onClick1(View v) {
        boolean checked = ((RadioButton) v).isChecked();

        switch (v.getId()) {
            case R.id.button1 :
                if(checked)
                    Toast.makeText(getApplicationContext(),((RadioButton) v).getText(),Toast.LENGTH_SHORT).show();
            }
        }

    public void onClick_2(View v) {
        boolean checked = ((RadioButton) v).isChecked();

        switch (v.getId()) {
            case R.id.button2:
                if (checked)
                    Toast.makeText(getApplicationContext(),((RadioButton) v).getText(), Toast.LENGTH_SHORT).show();
        }
    }
}