final submit
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@ -1,30 +1,251 @@
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package com.example.tiptime
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import android.os.Bundle
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import androidx.activity.ComponentActivity
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import androidx.activity.compose.setContent
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import androidx.activity.enableEdgeToEdge
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import androidx.annotation.DrawableRes
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import androidx.annotation.StringRes
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import androidx.compose.foundation.Image
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import androidx.compose.foundation.layout.Column
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import androidx.compose.foundation.layout.Row
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import androidx.compose.foundation.layout.Spacer
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import androidx.compose.foundation.layout.fillMaxWidth
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import androidx.compose.foundation.layout.padding
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import androidx.compose.foundation.layout.size
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import androidx.compose.foundation.layout.width
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import androidx.compose.foundation.background
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import androidx.compose.foundation.layout.*
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import androidx.compose.foundation.rememberScrollState
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import androidx.compose.foundation.shape.CircleShape
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import androidx.compose.foundation.text.KeyboardActions
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import androidx.compose.foundation.text.KeyboardOptions
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import androidx.compose.material3.MaterialTheme
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import androidx.compose.material3.OutlinedTextField
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import androidx.compose.material3.Text
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import androidx.compose.runtime.Composable
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import androidx.compose.foundation.verticalScroll
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import androidx.compose.material3.*
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import androidx.compose.runtime.*
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import androidx.compose.runtime.getValue
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import androidx.compose.runtime.setValue
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import androidx.compose.ui.Alignment
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import androidx.compose.ui.Modifier
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import androidx.compose.ui.draw.clip
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import androidx.compose.ui.graphics.Color
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import androidx.compose.ui.layout.ContentScale
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import androidx.compose.ui.platform.LocalSoftwareKeyboardController
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import androidx.compose.ui.res.painterResource
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import androidx.compose.ui.res.stringResource
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import androidx.compose.ui.semantics.error
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import androidx.compose.ui.text.font.FontWeight
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import androidx.compose.ui.text.input.ImeAction
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import androidx.compose.ui.text.input.KeyboardType
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import androidx.compose.ui.text.style.TextAlign
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import androidx.compose.ui.tooling.preview.Preview
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import androidx.compose.ui.unit.dp
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import androidx.compose.ui.unit.sp
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import com.example.tiptime.ui.theme.TipTimeTheme
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// --- Composable InputWithImage DIPERBARUI dengan Batas Karakter ---
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class MainActivity : ComponentActivity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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enableEdgeToEdge()
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super.onCreate(savedInstanceState)
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setContent {
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TipTimeTheme {
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Surface(
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modifier = Modifier.fillMaxSize(),
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color = MaterialTheme.colorScheme.surfaceContainerLowest
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) {
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NavigationController()
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}
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}
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}
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}
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}
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// Navigasi tidak berubah
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private sealed class Screen {
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object Start : Screen()
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object Main : Screen()
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}
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@Composable
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private fun NavigationController() {
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var currentScreen by remember { mutableStateOf<Screen>(Screen.Start) }
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when (currentScreen) {
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is Screen.Start -> {
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StartScreen(onNavigateToMain = { currentScreen = Screen.Main })
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}
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is Screen.Main -> {
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BMICalculatorScreen()
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}
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}
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}
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// --- VERSI DENGAN TOMBOL HITUNG ---
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@Composable
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fun BMICalculatorScreen() {
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// --- State untuk input pengguna ---
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var heightInput by remember { mutableStateOf("") }
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var weightInput by remember { mutableStateOf("") }
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var useMetric by remember { mutableStateOf(true) }
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// --- State untuk hasil perhitungan (dipisah) ---
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var calculatedBmi by remember { mutableStateOf(0.0) }
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// State untuk status error
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var isHeightError by remember { mutableStateOf(false) }
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var isWeightError by remember { mutableStateOf(false) }
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// Batas Maksimal
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val maxHeightCm = 250.0
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val maxWeightKg = 300.0
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// Keyboard controller untuk menyembunyikan keyboard setelah tombol ditekan
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val keyboardController = LocalSoftwareKeyboardController.current
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// --- FUNGSI BARU YANG DIPANGGIL SAAT TOMBOL DITEKAN ---
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fun performCalculation() {
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keyboardController?.hide() // Sembunyikan keyboard
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val height = heightInput.toDoubleOrNull() ?: 0.0
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val weight = weightInput.toDoubleOrNull() ?: 0.0
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// Lakukan validasi saat tombol ditekan
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isHeightError = height <= 0 || height > maxHeightCm
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isWeightError = weight <= 0 || weight > maxWeightKg
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// Hanya hitung dan perbarui state hasil jika tidak ada error
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if (!isHeightError && !isWeightError) {
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calculatedBmi = calculateBMI(height, weight, useMetric)
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} else {
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calculatedBmi = 0.0 // Reset hasil jika ada error
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}
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}
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// Menggunakan state hasil (calculatedBmi) untuk tampilan kartu atas
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val bmiCategory = bmiCategory(calculatedBmi)
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val bmiCategoryColor = getBmiCategoryColor(bmiCategory)
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Column(
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modifier = Modifier
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.fillMaxSize()
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.verticalScroll(rememberScrollState())
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.safeDrawingPadding()
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.padding(16.dp),
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horizontalAlignment = Alignment.CenterHorizontally
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) {
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Text(
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text = stringResource(R.string.bmi_calculator),
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style = MaterialTheme.typography.headlineLarge,
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fontWeight = FontWeight.Bold,
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modifier = Modifier.padding(vertical = 16.dp)
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)
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// --- Kartu Hasil BMI ---
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Card(
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modifier = Modifier
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.fillMaxWidth()
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.padding(bottom = 16.dp),
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elevation = CardDefaults.cardElevation(defaultElevation = 8.dp),
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colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceContainer)
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) {
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Column(
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modifier = Modifier
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.fillMaxWidth()
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.padding(24.dp),
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horizontalAlignment = Alignment.CenterHorizontally,
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verticalArrangement = Arrangement.Center
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) {
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Text(
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text = stringResource(id = R.string.your_bmi_is),
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style = MaterialTheme.typography.titleMedium,
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color = MaterialTheme.colorScheme.onSurfaceVariant
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)
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Text(
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// Menampilkan dari state hasil 'calculatedBmi'
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text = "%.1f".format(calculatedBmi),
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fontSize = 52.sp,
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fontWeight = FontWeight.ExtraBold,
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color = bmiCategoryColor
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)
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Spacer(modifier = Modifier.height(8.dp))
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Text(
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text = bmiCategory,
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fontSize = 20.sp,
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fontWeight = FontWeight.SemiBold,
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color = bmiCategoryColor
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)
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Spacer(modifier = Modifier.height(16.dp))
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BmiIndicatorBar(category = bmiCategory)
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}
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}
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// --- Bagian Input Data ---
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Column(
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modifier = Modifier.fillMaxWidth(),
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horizontalAlignment = Alignment.Start,
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verticalArrangement = Arrangement.spacedBy(16.dp) // Jarak antar kartu
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) {
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Text(
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text = "Pengaturan & Input",
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style = MaterialTheme.typography.titleMedium,
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modifier = Modifier.padding(start = 8.dp, bottom = 8.dp),
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fontWeight = FontWeight.Bold
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)
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Card(modifier = Modifier.fillMaxWidth()) {
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UnitSwitchRow(
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isMetric = useMetric,
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onUnitChanged = { useMetric = it },
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modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp)
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)
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}
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Card(modifier = Modifier.fillMaxWidth()) {
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InputWithImage(
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imageRes = R.drawable.ic_height,
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label = if (useMetric) R.string.height_cm else R.string.height_in,
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value = heightInput,
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onValueChanged = {
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heightInput = it
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// Reset error saat pengguna mulai mengetik lagi
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isHeightError = false
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},
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isError = isHeightError,
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errorMessage = "Input tidak valid (1-${maxHeightCm.toInt()})",
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imeAction = ImeAction.Next,
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modifier = Modifier.padding(16.dp)
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)
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}
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Card(modifier = Modifier.fillMaxWidth()) {
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InputWithImage(
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imageRes = R.drawable.ic_weight,
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label = if (useMetric) R.string.weight_kg else R.string.weight_lbs,
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value = weightInput,
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onValueChanged = {
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weightInput = it
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// Reset error saat pengguna mulai mengetik lagi
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isWeightError = false
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},
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isError = isWeightError,
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errorMessage = "Input tidak valid (1-${maxWeightKg.toInt()})",
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imeAction = ImeAction.Done,
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// Tambahkan keyboardActions untuk memicu perhitungan saat "Done" ditekan
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keyboardActions = KeyboardActions(onDone = { performCalculation() }),
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modifier = Modifier.padding(16.dp)
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)
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}
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}
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Spacer(modifier = Modifier.weight(1f)) // Spacer untuk mendorong tombol ke bawah
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// --- TOMBOL HITUNG BARU ---
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Button(
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onClick = { performCalculation() }, // Panggil fungsi perhitungan
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modifier = Modifier
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.fillMaxWidth()
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.padding(vertical = 16.dp)
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.height(50.dp)
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) {
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Text("HITUNG BMI", fontSize = 18.sp, fontWeight = FontWeight.Bold)
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}
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}
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}
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// --- Composable InputWithImage diperbarui ---
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@Composable
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fun InputWithImage(
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@DrawableRes imageRes: Int,
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@ -34,8 +255,7 @@ fun InputWithImage(
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isError: Boolean,
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errorMessage: String,
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imeAction: ImeAction,
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maxLength: Int, // Parameter baru untuk batas maksimal karakter
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keyboardActions: KeyboardActions = KeyboardActions.Default,
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keyboardActions: KeyboardActions = KeyboardActions.Default, // Tambah parameter ini
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modifier: Modifier = Modifier
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) {
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Row(
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Column(modifier = Modifier.weight(1f)) {
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OutlinedTextField(
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value = value,
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onValueChange = {
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// LOGIKA BARU UNTUK MEMBATASI INPUT
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if (it.length <= maxLength) {
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onValueChanged(it)
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}
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},
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onValueChange = onValueChanged,
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label = { Text(stringResource(label)) },
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keyboardOptions = KeyboardOptions(
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keyboardType = KeyboardType.Number,
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@ -67,7 +282,7 @@ fun InputWithImage(
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singleLine = true,
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modifier = Modifier.fillMaxWidth(),
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isError = isError,
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keyboardActions = keyboardActions
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keyboardActions = keyboardActions // Terapkan keyboardActions
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)
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if (isError) {
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Text(
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@ -80,3 +295,96 @@ fun InputWithImage(
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}
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}
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}
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// --- FUNGSI-FUNGSI PEMBANTU LAINNYA ---
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// (Tidak ada perubahan signifikan di sini)
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@Composable
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fun BmiIndicatorBar(category: String) {
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val categories = listOf("Underweight", "Normal", "Overweight", "Obese")
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Row(
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modifier = Modifier
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.fillMaxWidth()
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.height(16.dp)
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.clip(CircleShape)
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.background(MaterialTheme.colorScheme.surface)
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.padding(2.dp)
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) {
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categories.forEach { cat ->
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Box(
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modifier = Modifier
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.weight(1f)
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.fillMaxHeight()
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.background(
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if (cat == category) getBmiCategoryColor(cat) else Color.LightGray.copy(
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alpha = 0.3f
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)
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)
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)
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}
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}
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}
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@Composable
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fun UnitSwitchRow(isMetric: Boolean, onUnitChanged: (Boolean) -> Unit, modifier: Modifier = Modifier) {
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Row(
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modifier = modifier.fillMaxWidth(),
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verticalAlignment = Alignment.CenterVertically,
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horizontalArrangement = Arrangement.SpaceBetween
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) {
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Text("Unit", fontWeight = FontWeight.SemiBold)
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Row(verticalAlignment = Alignment.CenterVertically) {
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Text("Imperial", style = MaterialTheme.typography.bodyMedium)
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Switch(
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checked = isMetric,
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onCheckedChange = onUnitChanged,
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modifier = Modifier.padding(horizontal = 8.dp)
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)
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Text("Metric", style = MaterialTheme.typography.bodyMedium)
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}
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}
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}
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private fun calculateBMI(height: Double, weight: Double, isMetric: Boolean): Double {
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if (height <= 0 || weight <= 0) return 0.0
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if (height > 250 || weight > 300) return 0.0
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return if (isMetric) {
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val heightInMeters = height / 100
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weight / (heightInMeters * heightInMeters)
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} else {
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703 * weight / (height * height)
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}
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}
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private fun bmiCategory(bmi: Double): String {
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return when {
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bmi == 0.0 -> "..."
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bmi < 18.5 -> "Underweight"
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bmi < 25.0 -> "Normal"
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bmi < 30.0 -> "Overweight"
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else -> "Obese"
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}
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}
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@Composable
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private fun getBmiCategoryColor(category: String): Color {
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return when (category) {
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"Underweight" -> Color(0xFF8AB4F8)
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"Normal" -> Color(0xFF5BB974)
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"Overweight" -> Color(0xFFFDD663)
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"Obese" -> Color(0xFFE57373)
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else -> MaterialTheme.colorScheme.onSurface
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}
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}
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@Preview(showBackground = true, name = "Final BMI Calculator with Button")
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@Composable
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fun BMICalculatorScreenPreview() {
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TipTimeTheme {
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Surface(color = MaterialTheme.colorScheme.surfaceContainerLowest) {
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BMICalculatorScreen()
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}
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}
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}
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