안알못의 섭씨, 화씨 안드로이드 변환기 계산기 소스

안알못이 45분만에 해냈습니다. 여러분!

※주의※

대충 만든거라서 쓰레기 값이 다수 들어있습니다.

인증샷

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    tools:context="com.exam.android02.MainActivity">

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginStart="16dp"
        android:layout_marginTop="20dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignStart="@+id/editText1"
        android:layout_below="@+id/editText1"
        android:layout_marginTop="118dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:text="Change"
        android:onClick="changeit"
        android:layout_below="@+id/editText1"
        android:layout_centerHorizontal="true" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/editText2"
        android:layout_alignTop="@+id/editText1"
        android:layout_toEndOf="@+id/editText1"
        android:text="'C"
        android:textSize="30sp" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/editText2"
        android:layout_toEndOf="@+id/editText2"
        android:text="'F"
        android:textSize="30sp"
        android:layout_alignBottom="@+id/editText2" />

    <RadioGroup
        android:layout_width="wrap_content"
        android:id="@+id/radioGroup1"
        android:layout_height="wrap_content"
        android:layout_alignStart="@+id/editText1"
        android:layout_below="@+id/editText1">
    <RadioButton
        android:id="@+id/radioButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="18dp"
        android:text="섭씨를 화씨로" />

    <RadioButton
        android:id="@+id/radioButton2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="화씨를 섭씨로" />
    </RadioGroup>
</RelativeLayout>

MainActivity.java

package com.exam.android02;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;

public class MainActivity extends AppCompatActivity {

    private EditText edit1;
    private EditText edit2;

    private Button changeBtn;
    private RadioButton CtoF, FtoC;

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

        edit1 = (EditText) findViewById(R.id.editText1);
        edit2 = (EditText) findViewById(R.id.editText2);
        changeBtn = (Button) findViewById(R.id.button1);
        CtoF = (RadioButton) findViewById(R.id.radioButton);
        FtoC = (RadioButton) findViewById(R.id.radioButton2);
        final RadioGroup rg = (RadioGroup) findViewById(R.id.radioGroup1);

        changeBtn.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                String n1 = edit1.getText().toString();
                String n2 = edit2.getText().toString();

                int id = rg.getCheckedRadioButtonId();
                //getCheckedRadioButtonId() 의 리턴값은 선택된 RadioButton 의 id 값.
                RadioButton rb = (RadioButton) findViewById(id);
                switch(rb.getId()) {
                    case R.id.radioButton:
                        double r = Integer.parseInt(n1) * 1.8 + 32;
                        edit2.setText(String.valueOf(r));
                        break;
                    case R.id.radioButton2:
                        double r2 = (Integer.parseInt(n2)-32) / 1.8;
                        edit1.setText(String.valueOf(r2));
                        break;
                }
            } // end onClick()
        });  // end Listener

    } // end onCreate
}