java 파일
xml 파일
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package com.example.smat_501.tutorial2;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
// 더하기
public void addClick(View v){
EditText number1 = (EditText) findViewById(R.id.number1);
EditText number2 = (EditText) findViewById(R.id.number2);
TextView result = (TextView) findViewById(R.id.result);
int n1 = Integer.parseInt(number1.getText().toString());
int n2 = Integer.parseInt(number2.getText().toString());
result.setText(Integer.toString(n1 + n2));
}
// 빼기
public void subtractClick(View v){
EditText number1 = (EditText) findViewById(R.id.number1);
EditText number2 = (EditText) findViewById(R.id.number2);
TextView result = (TextView) findViewById(R.id.result);
int n1 = Integer.parseInt(number1.getText().toString());
int n2 = Integer.parseInt(number2.getText().toString());
result.setText(Integer.toString(n1 - n2));
}
// 곱하기
public void multiplyClick(View v){
EditText number1 = (EditText) findViewById(R.id.number1);
EditText number2 = (EditText) findViewById(R.id.number2);
TextView result = (TextView) findViewById(R.id.result);
int n1 = Integer.parseInt(number1.getText().toString());
int n2 = Integer.parseInt(number2.getText().toString());
result.setText(Integer.toString(n1 * n2));
}
// 나누기
public void divideClick(View v){
EditText number1 = (EditText) findViewById(R.id.number1);
EditText number2 = (EditText) findViewById(R.id.number2);
TextView result = (TextView) findViewById(R.id.result);
int n1 = Integer.parseInt(number1.getText().toString());
int n2 = Integer.parseInt(number2.getText().toString());
result.setText(Integer.toString(n1 / n2));
}
}
| cs |
xml 파일
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<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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.example.smat_501.tutorial2.MainActivity"
tools:layout_editor_absoluteY="81dp">
<EditText
android:id="@+id/number1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="첫 번째 숫자"
android:inputType="textPersonName"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.502"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.034" />
<EditText
android:id="@+id/number2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="두 번째 숫자"
android:inputType="textPersonName"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.502"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.154" />
<Button
android:id="@+id/addButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="addClick"
android:text="더하기"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.054"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.287" />
<Button
android:id="@+id/subtractButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="subtractClick"
android:text="빼기"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.351"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.287" />
<Button
android:id="@+id/multiplyButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="multiplyClick"
android:text="곱하기"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.648"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.287" />
<Button
android:id="@+id/divideButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="divideClick"
android:text="나누기"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.945"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.287" />
<TextView
android:id="@+id/result"
android:layout_width="352dp"
android:layout_height="37dp"
android:textAppearance="@style/TextAppearance.AppCompat.Display1"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.405" />
</android.support.constraint.ConstraintLayout>
| cs |
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