KPlanisphere / Android-Calculator-App

Examen 1 - Desarrollo de Aplicaciones Moviles

Android Calculator App

A simple calculator application developed using Android Studio. This project demonstrates the implementation of basic arithmetic operations in an Android app, featuring a user-friendly interface and efficient Kotlin code.

Features

• Basic arithmetic operations: addition, subtraction, multiplication, and division.
• Clear and backspace functionalities.
• Responsive user interface compatible with various screen sizes.
• Efficient Kotlin implementation for core functionalities.

Notable Files

MainActivity.kt

This file contains the main activity code, initializing the user interface and handling user interactions.

package com.example.calculadora

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        
        // Set up button click listeners
        // Example for the number button
        button_one.setOnClickListener { appendOnExpression("1", true) }
        
        // More button setup and event listeners...
    }
    
    private fun appendOnExpression(string: String, canClear: Boolean) {
        // Append text to the expression display
    }
}

Calculator.kt

This file contains the logic for performing arithmetic operations.

package com.example.calculadora

class Calculator {
    fun add(a: Double, b: Double): Double {
        return a + b
    }
    
    fun subtract(a: Double, b: Double): Double {
        return a - b
    }
    
    fun multiply(a: Double, b: Double): Double {
        return a * b
    }
    
    fun divide(a: Double, b: Double): Double {
        if (b == 0.0) {
            throw IllegalArgumentException("Cannot divide by zero")
        }
        return a / b
    }
}

Installation

1. Clone the repository:

   git clone https://github.com/KPlanisphere/android-calculator.git

2. Open the project in Android Studio.

3. Build and run the application on an emulator or physical device.

Usage

1. Launch the application on your Android device.
2. Use the on-screen buttons to perform arithmetic operations.
3. Clear or backspace as needed to correct input.