balasathiesh / simplecalculator

Ex.No:9 Develop a simple calculator using android studio.

AIM:

To develop a program to develop a simple calculator in Android Studio.

EQUIPMENTS REQUIRED:

Android Studio(Latest Version)

ALGORITHM:

Step 1: Open Android Stdio and then click on File -> New -> New project.

Step 2: Then type the Application name as calculator and click Next.

Step 3: Then select the Minimum SDK as shown below and click Next.

Step 4: Then select the Empty Activity and click Next. Finally click Finish.

Step 5: Design layout using UI components in activity_main.xml.

Step 6: Display the calculator operation in MainActivity file.

Step 7: Save and run the application.

PROGRAM:

Program to print the text “calculator operation”.
Developed by:Bala Sathiesh CS
Registeration Number :212222040022

Mainactivity.java

package com.example.calculator;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    EditText num1, num2;
    Button btnAdd, btnSub, btnMul, btnDiv;
    TextView result;

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

        num1 = findViewById(R.id.etNum1);
        num2 = findViewById(R.id.etNum2);
        btnAdd = findViewById(R.id.btnAdd);
        btnSub = findViewById(R.id.btnSub);
        btnMul = findViewById(R.id.btnMul);
        btnDiv = findViewById(R.id.btnDiv);
        result = findViewById(R.id.tvResult);

        btnAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                double number1 = Double.parseDouble(num1.getText().toString());
                double number2 = Double.parseDouble(num2.getText().toString());
                double sum = number1 + number2;
                result.setText("Result: " + sum);
            }
        });

        btnSub.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                double number1 = Double.parseDouble(num1.getText().toString());
                double number2 = Double.parseDouble(num2.getText().toString());
                double difference = number1 - number2;
                result.setText("Result: " + difference);
            }
        });

        btnMul.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                double number1 = Double.parseDouble(num1.getText().toString());
                double number2 = Double.parseDouble(num2.getText().toString());
                double product = number1 * number2;
                result.setText("Result: " + product);
            }
        });

        btnDiv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                double number1 = Double.parseDouble(num1.getText().toString());
                double number2 = Double.parseDouble(num2.getText().toString());
                if (number2 != 0) {
                    double quotient = number1 / number2;
                    result.setText("Result: " + quotient);
                } else {
                    result.setText("Cannot divide by zero");
                }
            }
        });
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/etNum1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter Number 1"
        android:inputType="numberDecimal" />

    <EditText
        android:id="@+id/etNum2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter Number 2"
        android:inputType="numberDecimal" />

    <Button
        android:id="@+id/btnAdd"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:backgroundTint="#02508E"
        android:text="Add"
        android:textColor="#FFFFFF" />

    <Button
        android:id="@+id/btnSub"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:backgroundTint="#03E2FF"
        android:text="Subtract" />

    <Button
        android:id="@+id/btnMul"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:backgroundTint="#7FEC01"
        android:text="Multiply" />

    <Button
        android:id="@+id/btnDiv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:backgroundTint="#80FFDB"
        android:text="Divide" />

    <TextView
        android:id="@+id/tvResult"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:text="Result: "
        android:textSize="18sp" />

</LinearLayout>

OUTPUT

RESULT

Thus a Simple Android Application develop a program to create simple calculator in Android Studio is developed and executed successfully.