queue

package com.amlxv.anotherclass

import android.app.Activity
import android.os.Bundle
import android.widget.Button
import android.widget.EditText
import android.widget.TextView
import android.widget.Toast
import java.text.DecimalFormat

class CarLoanActivity : Activity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        // Set the layout
        setContentView(R.layout.activity_car_loan)

        // Call the widgets
        val btnCalculate = findViewById<Button>(R.id.btn_calculate);
        val price = findViewById<EditText>(R.id.price);
        val deposit = findViewById<EditText>(R.id.deposit);
        val interest = findViewById<EditText>(R.id.interest);
        val year = findViewById<EditText>(R.id.year);
        val instalment = findViewById<TextView>(R.id.instalment);

        // Implement method
        btnCalculate.setOnClickListener {

            var instalmentTotal: String?;

            // Input checking
            val valid: Boolean =
                price.text.isNotEmpty() || deposit.text.isNotEmpty() || interest.text.isNotEmpty() || year.text.isNotEmpty()

            if (!valid) {
                Toast.makeText(
                    this,
                    "All data are required to perform this task!",
                    Toast.LENGTH_SHORT
                ).show();
            } else {
                val decimalFormat = DecimalFormat("#.##");

                instalmentTotal =
                    decimalFormat.format((((((getDouble(price) - getDouble(deposit)) * getDouble(interest)) / 100) * getInt(
                        year
                    )) + (getDouble(price) - getDouble(deposit))) / (getInt(year) * 12)).toString();

                instalment.text = "** The instalment for your car is: **\n\nRM " + instalmentTotal + "/month";

            }
        }
    }

    private fun getDouble(item: EditText): Double {
        return item.text.toString().toDouble()
    }

    private fun getInt(item: EditText): Int {
        return item.text.toString().toInt()
    }
}