Tugas 6

 Tugas 6 - Currency Converter

Ahmad Fauzan Alghifari - 5025211091

Problem Statement

Membuat aplikasi konversi mata uang dengan android studio. Disini saya membuat aplikasi konverter dengan empat mata uang yakni IDR, USD, JPY, dan SGD.

Kode Sumber : Github

	package com.example.currencyconverter
	import android.os.Bundle
	import androidx.activity.ComponentActivity
	import androidx.activity.compose.setContent
	import androidx.compose.foundation.layout.*
	import androidx.compose.material3.*
	import androidx.compose.runtime.*
	import androidx.compose.ui.Modifier
	import androidx.compose.ui.unit.dp
	class MainActivity : ComponentActivity() {
	private val ratesToIDR = mapOf(
	"IDR" to 1.0,
	"USD" to 16858.0,
	"JPY" to 118.58,
	"SGD" to 12867.10
	)
	override fun onCreate(savedInstanceState: Bundle?) {
	super.onCreate(savedInstanceState)
	setContent {
	CurrencyConverter()
	}
	}
	@Composable
	fun CurrencyConverter() {
	var amountInput by remember { mutableStateOf("") }
	var fromCurrency by remember { mutableStateOf("IDR") }
	var toCurrency by remember { mutableStateOf("USD") }
	var result by remember { mutableStateOf("") }
	val currencies = listOf("IDR", "USD", "JPY", "SGD")
	Column(modifier = Modifier.padding(16.dp)) {
	OutlinedTextField(
	value = amountInput,
	onValueChange = { amountInput = it },
	label = { Text("Amount") },
	modifier = Modifier.fillMaxWidth()
	)
	Spacer(modifier = Modifier.height(8.dp))
	DropdownMenuBox(
	label = "From",
	options = currencies,
	selected = fromCurrency,
	onSelectedChange = { fromCurrency = it }
	)
	Spacer(modifier = Modifier.height(8.dp))
	DropdownMenuBox(
	label = "To",
	options = currencies,
	selected = toCurrency,
	onSelectedChange = { toCurrency = it }
	)
	Spacer(modifier = Modifier.height(16.dp))
	Button(onClick = {
	val amount = amountInput.toDoubleOrNull()
	if (amount != null) {
	val resultAmount = amount * (ratesToIDR[fromCurrency] ?: 1.0) / (ratesToIDR[toCurrency] ?: 1.0)
	result = "%.2f $toCurrency".format(resultAmount)
	} else {
	result = "Invalid input"
	}
	}) {
	Text("Convert")
	}
	Spacer(modifier = Modifier.height(16.dp))
	Text(text = result)
	}
	}
	@Composable
	fun DropdownMenuBox(
	label: String,
	options: List<String>,
	selected: String,
	onSelectedChange: (String) -> Unit
	) {
	var expanded by remember { mutableStateOf(false) }
	Column {
	Text(text = label)
	Box {
	OutlinedButton(onClick = { expanded = true }) {
	Text(selected)
	}
	DropdownMenu(
	expanded = expanded,
	onDismissRequest = { expanded = false }
	) {
	options.forEach { option ->
	DropdownMenuItem(
	text = { Text(option) },
	onClick = {
	onSelectedChange(option)
	expanded = false
	}
	)
	}
	}
	}
	}
	}
	}

view raw gistfile1.txt hosted with ❤ by GitHub

Output

Video Presentasi