To develop a program to create a simple calculator using Android Studio.
Android Studio(Min. required Artic Fox)
Step 1: Open Android Studio and then click on File -> New -> New project.
Step 2: Then type the Application name as SMSIntent and click Next.
Step 3: Select the Minimum SDK below and click Next.
Step 4: Then select the Empty Activity and click Next. Finally, click Finish.
Step 5: Design layout in activity_main.xml.
Step 6: Perform the Calculator Operation in MainActivity.java
Step 7: Save and run the application.
/*
Program to create simple calculator using Android Studio.
Developed by: DurgaDevi P
RegisterNumber: 212220230015
*/
package com.example.ex_7;
import androidx.appcompat.app.AppCompatActivity;
//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.TextView;
import android.widget.Toast;
import android.os.Bundle;
import android.os.Bundle;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
EditText e1, e2;
TextView t1;
int num1, num2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public boolean getNumbers() {
e1 = (EditText) findViewById(R.id.num1);
e2 = (EditText) findViewById(R.id.num2);
t1 = (TextView) findViewById(R.id.result);
String s1 = e1.getText().toString();
String s2 = e2.getText().toString();
if ((s1.equals(null) && s2.equals(null))
|| (s1.equals("") && s2.equals(""))) {
String result = "Please enter a value";
t1.setText(result);
return false;
} else {
num1 = Integer.parseInt(s1);
num2 = Integer.parseInt(s2);
}
return true;
}
public void doSum(View v) {
if (getNumbers()) {
int sum = num1 + num2;
t1.setText(num1+"+"+num2+"="+Integer.toString(sum));
}
}
public void doSub(View v) {
if (getNumbers()) {
int sub = num1 - num2;
t1.setText(num1+"-"+num2+"="+Integer.toString(sub));
}
}
public void doMul(View v) {
if (getNumbers()) {
int mul = num1 * num2;
t1.setText(num1+"*"+num2+"="+Integer.toString(mul));
}
}
public void doDiv(View v) {
if (getNumbers()) {
double div = num1 / (num2 * 1.0);
t1.setText(num1 + "/" + num2 + "=" + Double.toString(div));
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
android:background="@color/white"
tools:context=".MainActivity">
<TextView
android:layout_width="194dp"
android:layout_height="43dp"
android:layout_marginStart="114dp"
android:layout_marginLeft="114dp"
android:layout_marginTop="58dp"
android:layout_marginEnd="103dp"
android:layout_marginRight="103dp"
android:layout_marginBottom="502dp"
android:scrollbarSize="30dp"
android:text=" Calculator"
android:textAppearance="@style/TextAppearance.AppCompat.Body1"
android:textSize="30dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/num1"
android:layout_width="364dp"
android:layout_height="28dp"
android:layout_marginStart="72dp"
android:layout_marginTop="70dp"
android:layout_marginEnd="71dp"
android:layout_marginBottom="416dp"
android:background="@android:color/white"
android:ems="10"
android:hint="Number 1"
android:inputType="number"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/num2"
android:layout_width="363dp"
android:layout_height="30dp"
android:layout_marginStart="72dp"
android:layout_marginTop="112dp"
android:layout_marginEnd="71dp"
android:layout_marginBottom="374dp"
android:background="@android:color/white"
android:ems="10"
android:hint="Number 2"
android:inputType="number"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/result"
android:layout_width="356dp"
android:layout_height="71dp"
android:layout_marginStart="41dp"
android:layout_marginTop="151dp"
android:layout_marginEnd="48dp"
android:layout_marginBottom="287dp"
android:background="@android:color/white"
android:text="Result"
android:textColorLink="#673AB7"
android:textSize="25sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/sum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="292dp"
android:layout_marginEnd="307dp"
android:layout_marginBottom="263dp"
android:backgroundTint="@android:color/holo_red_light"
android:onClick="doSum"
android:text="+"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/sub"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="210dp"
android:layout_marginTop="292dp"
android:layout_marginEnd="113dp"
android:layout_marginBottom="263dp"
android:backgroundTint="@android:color/holo_red_light"
android:onClick="doSub"
android:text="-"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/div"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="307dp"
android:layout_marginTop="292dp"
android:layout_marginEnd="16dp"
android:layout_marginBottom="263dp"
android:backgroundTint="@android:color/holo_red_light"
android:onClick="doDiv"
android:text="/"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/mul"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="113dp"
android:layout_marginTop="292dp"
android:layout_marginEnd="210dp"
android:layout_marginBottom="263dp"
android:backgroundTint="@android:color/holo_red_light"
android:onClick="doMul"
android:text="x"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<application
android:allowBackup="true"
android:dataExtractionRules="@xml/data_extraction_rules"
android:fullBackupContent="@xml/backup_rules"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/Theme.Ex_7"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Thus a Simple Android Application to create a calculator using Android Studio was developed and executed successfully.
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent