Hello everyone! Let me tell you that I’m a total newbie, but totally excited about Kotlin and it’s my hobby.
I am trying to design an application and I am not succeeding, could someone guide me?
It is an APP to divide the expenses between friends.
Here I leave the activity_main.xml and the MainActivity.kt and a picture of the UI.
Thank you in advance for any help you can give me!
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="16dp">
<TextView
android:id="@+id/textViewExpenditure"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Total Expenditure:" />
<EditText
android:id="@+id/editTextExpenditure"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="numberDecimal"
android:hint="Enter total expenditure" />
<TextView
android:id="@+id/textViewPersons"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Number of Persons:" />
<EditText
android:id="@+id/editTextPersons"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="number"
android:hint="Enter number of persons" />
<TextView
android:id="@+id/textViewNamePerson1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Person 1 Name:" />
<EditText
android:id="@+id/editTextNamePerson1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter person 1 name" />
<TextView
android:id="@+id/textViewContribution"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Contribution:" />
<EditText
android:id="@+id/editTextContribution"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="numberDecimal"
android:hint="Enter contribution amount" />
<Button
android:id="@+id/buttonCalculate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Calculate" />
<TextView
android:id="@+id/textViewPayment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Payment: " />
<TextView
android:id="@+id/textViewOwe"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Owe: " />
<TableLayout
android:id="@+id/tableLayoutPeople"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:stretchColumns="*">
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Name" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Contribution" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Owe" />
</TableRow>
</TableLayout>
</LinearLayout>
package com.luiggiapp.prueba01
import android.os.Bundle
import android.widget.Button
import android.widget.EditText
import android.widget.TableLayout
import android.widget.TableRow
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
private lateinit var editTextExpenditure: EditText
private lateinit var editTextPersons: EditText
private lateinit var editTextNamePerson1: EditText
private lateinit var editTextContribution: EditText
private lateinit var buttonCalculate: Button
private lateinit var textViewPayment: TextView
private lateinit var textViewOwe: TextView
private lateinit var tableLayout: TableLayout
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
editTextExpenditure = findViewById(R.id.editTextExpenditure)
editTextPersons = findViewById(R.id.editTextPersons)
editTextNamePerson1 = findViewById(R.id.editTextNamePerson1)
editTextContribution = findViewById(R.id.editTextContribution)
buttonCalculate = findViewById(R.id.buttonCalculate)
textViewPayment = findViewById(R.id.textViewPayment)
textViewOwe = findViewById(R.id.textViewOwe)
tableLayout = findViewById(R.id.tableLayoutPeople)
buttonCalculate.setOnClickListener {
calculateExpenses()
}
}
private fun calculateExpenses() {
val expenditure = editTextExpenditure.text.toString().toDouble()
val persons = editTextPersons.text.toString().toInt()
val contribution = editTextContribution.text.toString().toDouble()
val payment = expenditure / persons
val owe = payment - contribution
textViewPayment.text = "Payment: $payment"
textViewOwe.text = "Owe: $owe"
// Limpiar los campos de entrada
editTextNamePerson1.text.clear()
editTextContribution.text.clear()
// Crear una nueva fila para la tabla
val row = TableRow(this)
// Crear celdas para cada columna
val nameCell = TextView(this)
nameCell.text = editTextNamePerson1.text.toString()
row.addView(nameCell)
val contributionCell = TextView(this)
contributionCell.text = editTextContribution.text.toString()
row.addView(contributionCell)
val oweCell = TextView(this)
oweCell.text = owe.toString()
row.addView(oweCell)
// Agregar fila a la tabla
tableLayout.addView(row)
}
}
