사칙연산 Spinner와 Radio버튼으로 하기

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="계산기 APP"
        android:textSize="30sp" />

    <EditText
        android:id="@+id/one"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="numberDecimal" />

    <LinearLayout 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:layout_gravity="center" >
    
        <RadioGroup
            android:orientation="horizontal"
        android:id="@+id/RadioGroup01"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >
        
    <RadioButton
        android:id="@+id/radio1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="+"
        android:textSize="30sp" />
    
    <RadioButton
        android:id="@+id/radio2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="-"
        android:textSize="30sp" />
    
    <RadioButton
        android:id="@+id/radio3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="X"
        android:textSize="30sp" />
    
    <RadioButton
        android:id="@+id/radio4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="÷"
        android:textSize="30sp" />
    </RadioGroup>
    </LinearLayout>

    <EditText
        android:id="@+id/two"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="numberDecimal" />

    <Button
        android:id="@+id/sum"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="계산" />

    <TextView
        android:id="@+id/result"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="결과 : "
        android:textSize="30sp" />

</LinearLayout>

package kr.vichara.test;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;


public class TestActivity extends Activity {
	int i,j,a1,a2,a3,a4,p;
	String b1;
	TextView result;
	Button sum;
	RadioGroup group;
	EditText one,two;
	RadioButton rb;

	/*public void Process(){
		switch(group.getCheckedRadioButtonId()){
		case R.id.radio1:
			result.setText("결과 : "+(i+j));
			break;
		case R.id.radio2:
			result.setText("결과   : "+(i-j));
			break;
		case R.id.radio3:
			result.setText("결과        : "+(i*j));
			break;
		case R.id.radio4:
			result.setText("결과: "+(i/j));
			break;
		}
	}*/

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		result = (TextView)findViewById(R.id.result);
		sum = (Button)findViewById(R.id.sum);

		one = (EditText)findViewById(R.id.one);
		two = (EditText)findViewById(R.id.two);
		//초기 라디오 선택
		group=(RadioGroup)findViewById(R.id.RadioGroup01);
		group.check(R.id.radio1);

		sum.setOnClickListener(new Button.OnClickListener(){
			public void onClick(View v) {
				try{
					i = Integer.parseInt(one.getText()+"");
					j = Integer.parseInt(two.getText()+"");
				}catch(Exception e){
					result.setText("예외 발생");
				}finally{
					switch(group.getCheckedRadioButtonId()){
					case R.id.radio1:
						result.setText("결과 : "+(i+j));
						break;
					case R.id.radio2:
						result.setText("결과   : "+(i-j));
						break;
					case R.id.radio3:
						result.setText("결과        : "+(i*j));
						break;
					case R.id.radio4:
						result.setText("결과: "+(i/j));
						break;
					}
				}
			}
		});
	}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    
    
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="사칙연산 계산기 APP"
        android:textSize="30sp" />

    <EditText
        android:id="@+id/one"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="numberDecimal" />

    <TextView
        android:id="@+id/selection"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <Spinner 
        android:id="@+id/spinner"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:textSize="50dp"
        android:drawSelectorOnTop="true" />

    <EditText
        android:id="@+id/two"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="numberDecimal" />

    <Button
        android:id="@+id/sum"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="계산" />

    <TextView
        android:id="@+id/result"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="결과 : "
        android:textSize="30sp" />

</LinearLayout>

package kr.vichara.test;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.TextView;

public class TestActivity extends Activity implements
AdapterView.OnItemSelectedListener{
	int i, j,p;
	String s;
	TextView selection;
	String[] items = { "+","-","X","÷"};
	TextView result ;
	EditText one,two;
	
	Spinner spin;
	Button sum;


	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		selection = (TextView) findViewById(R.id.selection);

		//이벤트 소스
		spin = (Spinner) findViewById(R.id.spinner);

		//이벤트 소스와 이벤트 리스너가 구현된 객체 연결
		spin.setOnItemSelectedListener(this);

		//어댑터를 이용해 데이터 셋팅
		ArrayAdapter<string> aa = new ArrayAdapter<string>(this,
				android.R.layout.simple_spinner_dropdown_item, items);

		//드롭다운  화면에 표시할 리소스 지정
		aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

		//ArrayAdapter를 Spinner에 등록
		spin.setAdapter(aa);

		sum = (Button) findViewById(R.id.sum);
		
		one = (EditText) findViewById(R.id.one);
		two = (EditText) findViewById(R.id.two);
		result = (TextView) findViewById(R.id.result);
		
		//익명내부클래스로 이벤트리스너
		sum.setOnClickListener(new Button.OnClickListener(){

			public void onClick(View v) {
				try{
					i = Integer.parseInt(one.getText()+"");
					j = Integer.parseInt(two.getText()+"");
				}catch(Exception e){
					result.setText("예외 발생");
				}finally{
					switch((int)spin.getSelectedItemPosition()){
					case 0 :
						result.setText("결과 : "+(i+j));;
						break;
					case 1 :
						result.setText("결과   : "+(i-j));
						break;
					case 2 :
						result.setText("결과        : "+(i*j));
						break;
					case 3 :
						if(i/j<=0){
							result.setText("0보다 작은수로 나눌 수 없습니다");
						}else{
						result.setText("결과: "+(i/j));
						break;
						}
					}
				}
			}
		});
	}

	//이벤트 핸들러
	//전달된 인자
	//AdapterView<!--?--> parent : 이벤트가 발생한 Spinner 객체
	//(제네릭 표현을 써야됨 쓰고싶지 않을때<!--?-->,노란줄이 가더라도 안쓰는것이 좋음) <!--?--> = Object
	//view v : Spinner 하위 객체의 이벤트가 발생한 객체 
	//position : 이벤트가 발생한 위치
	//id : position = id
	public void onItemSelected(AdapterView<!--?--> parent, View v, int position,
			long id) {

	}

	//이벤트 핸들러
	public void onNothingSelected(AdapterView<!--?--> parent) {
		selection.setText("");
	}

}