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Android用電卓アプリ
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:gravity="center|right"
android:text="@string/result"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="50sp" />
<LinearLayout
android:id="@+id/linearLayout2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/linearLayout1"
android:layout_centerVertical="true"
android:gravity="center" >
<Button
android:id="@+id/Button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/button4" />
<Button
android:id="@+id/Button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/button5" />
<Button
android:id="@+id/Button6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/button6" />
<Button
android:id="@+id/Times"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/times" />
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayout3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/linearLayout2"
android:layout_below="@+id/linearLayout2"
android:layout_marginTop="19dp"
android:gravity="center" >
<Button
android:id="@+id/Button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/button1" />
<Button
android:id="@+id/Button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/button2" />
<Button
android:id="@+id/Button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/button3" />
<Button
android:id="@+id/Divide"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/divide" />
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayout4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/linearLayout3"
android:layout_below="@+id/linearLayout3"
android:layout_marginTop="17dp"
android:gravity="center" >
<Button
android:id="@+id/Button0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/button0" />
<Button
android:id="@+id/Plus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/plus" />
<Button
android:id="@+id/Minus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/minus" />
<Button
android:id="@+id/Equal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/equal" />
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/linearLayout2"
android:layout_alignLeft="@+id/textView1"
android:layout_marginBottom="15dp"
android:gravity="center" >
<Button
android:id="@+id/Button7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/button7" />
<Button
android:id="@+id/Button8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/button8" />
<Button
android:id="@+id/Button9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/button9" />
<Button
android:id="@+id/Clear"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/clear" />
</LinearLayout>
</RelativeLayout>
package com.example.calculator;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity implements OnClickListener {
private int result = 0;
private int before_operator = -1;
private int value = 0;
private boolean wait = false;
private int[] Numbers = { R.id.Button0, R.id.Button1, R.id.Button2,
R.id.Button3, R.id.Button4, R.id.Button5, R.id.Button6,
R.id.Button7, R.id.Button8, R.id.Button9 };
private int[] Operators = {R.id.Plus, R.id.Minus, R.id.Times, R.id.Divide};
private void calculate(){
switch(before_operator){
case R.id.Plus:
result = value + result;
break;
case R.id.Minus:
result = value - result;
break;
case R.id.Times:
result = value * result;
break;
case R.id.Divide:
result = value / result;
break;
}
value = 0;
before_operator = -1;
wait = true;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
for(int i=0;i<10;i++){
Button button = (Button)findViewById(Numbers[i]);
button.setOnClickListener(this);
}
for(int i=0;i<4;i++){
Button button = (Button)findViewById(Operators[i]);
button.setOnClickListener(this);
}
Button clear = (Button)findViewById(R.id.Clear);
clear.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
result = 0;
before_operator = -1;
value = 0;
show();
}
});
Button equal = (Button)findViewById(R.id.Equal);
equal.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
calculate();
show();
}
});
}
private void show(){
TextView textview = (TextView)findViewById(R.id.textView1);
textview.setText(Integer.toString(result));
}
@Override
public void onClick(View v) {
for(int i=0;i<10;i++){
if(v.getId() == Numbers[i]){
if(wait){
wait = false;
result = 0;
}
result = result*10 + i;
show();
return ;
}
}
if(before_operator != -1){
calculate();
show();
}
before_operator = v.getId();
value = result;
wait = true;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">電卓</string>
<string name="action_settings">Settings</string>
<string name="result">0</string>
<string name="plus">+</string>
<string name="minus">-</string>
<string name="times">×</string>
<string name="divide">÷</string>
<string name="button0">0</string>
<string name="button1">1</string>
<string name="button2">2</string>
<string name="button3">3</string>
<string name="button4">4</string>
<string name="button5">5</string>
<string name="button6">6</string>
<string name="button7">7</string>
<string name="button8">8</string>
<string name="button9">9</string>
<string name="equal">=</string>
<string name="clear">C</string>
</resources>
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