UTS

README.md

@@ -1,7 +1,18 @@
 Kalkulator BMI
 ===============
+Langkah-langkah:
 
-Silahkan kembangkan aplikasi ini untuk melakukan perhitungan BMI
+1. Clone Repository Project
+Saya meng-clone repository project dari GitHub menggunakan Android Studio untuk dijadikan dasar pengerjaan tugas.
+
+2. Modifikasi Tampilan Aplikasi
+Saya meminta bantuan ChatGPT dan DeepSeek untuk memberikan saran tampilan aplikasi agar lebih menarik. Setelah itu, saya menyesuaikan tampilan sesuai arahan yang diberikan.
+
+3. Mengubah Icon Aplikasi (APK)
+Saya mengganti icon aplikasi melalui fitur Image Asset di Android Studio dengan icon baru sesuai arahan dari ChatGPT.
+
+4. Review dan Uji Coba
+Setelah perubahan selesai, saya menjalankan aplikasi untuk memastikan tampilan dan icon sudah berubah dengan baik.
 
 Petunjuk lebih detil dapat dibaca di
 https://docs.google.com/document/d/1iGiC0Bg3Bdcd2Maq45TYkCDUkZ5Ql51E/edit?rtpof=true

app/src/main/AndroidManifest.xml

@@ -20,9 +20,9 @@
 
     <application
         android:allowBackup="true"
-        android:icon="@mipmap/ic_launcher"
+        android:icon="@mipmap/app_icon"
         android:label="@string/app_name"
-        android:roundIcon="@mipmap/ic_launcher_round"
+        android:roundIcon="@mipmap/app_icon_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.TipTime"
         tools:targetApi="33">

app/src/main/java/com/example/tiptime/MainActivity.kt

@@ -54,8 +54,9 @@ import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
 import com.example.tiptime.ui.theme.TipTimeTheme
-import java.text.NumberFormat
+import java.text.DecimalFormat
 
 class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -75,14 +76,16 @@ class MainActivity : ComponentActivity() {
 
 @Composable
 fun TipTimeLayout() {
-    var amountInput by remember { mutableStateOf("") }
+    var heightInput by remember { mutableStateOf("") }
-    var tipInput by remember { mutableStateOf("") }
+    var weightInput by remember { mutableStateOf("") }
-    var roundUp by remember { mutableStateOf(false) }
+    var useUSC by remember { mutableStateOf(false) }
 
-    val BmiHeight = amountInput.toDoubleOrNull() ?: 0.0
+    val height = heightInput.toDoubleOrNull() ?: 0.0
-    val BmiWeight = tipInput.toDoubleOrNull() ?: 0.0
+    val weight = weightInput.toDoubleOrNull() ?: 0.0
-    val bmi = calculateBMI(BmiHeight, BmiWeight, roundUp)
+
-    val category = calculateBMICategory(BmiHeight, BmiWeight, roundUp)
+    val bmi = calculateBMI(height, weight, useUSC)
+    val category = calculateBMICategory(bmi)
+    val categoryColor = getCategoryColor(category)
 
     Column(
         modifier = Modifier
@@ -94,11 +97,14 @@ fun TipTimeLayout() {
         verticalArrangement = Arrangement.Center
     ) {
         Text(
-            text = stringResource(R.string.calculate_tip),
+            text = "Calculate BMI",
+            style = MaterialTheme.typography.headlineMedium,
+            color = MaterialTheme.colorScheme.primary,
             modifier = Modifier
                 .padding(bottom = 16.dp, top = 40.dp)
                 .align(alignment = Alignment.Start)
         )
+
         EditNumberField(
             label = R.string.height,
             leadingIcon = R.drawable.number,
@@ -106,10 +112,13 @@ fun TipTimeLayout() {
                 keyboardType = KeyboardType.Number,
                 imeAction = ImeAction.Next
             ),
-            value = amountInput,
+            value = heightInput,
-            onValueChanged = { amountInput = it },
+            onValueChanged = { heightInput = it },
-            modifier = Modifier.padding(bottom = 32.dp).fillMaxWidth(),
+            modifier = Modifier
+                .padding(bottom = 32.dp)
+                .fillMaxWidth(),
         )
+
         EditNumberField(
             label = R.string.weight,
             leadingIcon = R.drawable.number,
@@ -117,22 +126,30 @@ fun TipTimeLayout() {
                 keyboardType = KeyboardType.Number,
                 imeAction = ImeAction.Done
             ),
-            value = tipInput,
+            value = weightInput,
-            onValueChanged = { tipInput = it },
+            onValueChanged = { weightInput = it },
-            modifier = Modifier.padding(bottom = 32.dp).fillMaxWidth(),
+            modifier = Modifier
+                .padding(bottom = 32.dp)
+                .fillMaxWidth(),
         )
-        RoundTheTipRow(
+
-            roundUp = roundUp,
+        RoundTheUnitRow(
-            onRoundUpChanged = { roundUp = it },
+            useUSC = useUSC,
+            onUnitChanged = { useUSC = it },
             modifier = Modifier.padding(bottom = 32.dp)
         )
+
         Text(
-            text = stringResource(R.string.bmi_calculation, bmi),
+            text = "BMI Anda: $bmi",
-            style = MaterialTheme.typography.displaySmall
+            style = MaterialTheme.typography.displaySmall,
+            color = MaterialTheme.colorScheme.onSurface
         )
+
         Text(
-            text = stringResource(R.string.bmi_category, category),
+            text = "Kategori: $category",
-            style = MaterialTheme.typography.displaySmall
+            fontSize = 20.sp,
+            color = categoryColor,
+            modifier = Modifier.padding(top = 8.dp)
         )
 
         Spacer(modifier = Modifier.height(150.dp))
@@ -160,51 +177,75 @@ fun EditNumberField(
 }
 
 @Composable
-fun RoundTheTipRow(
+fun RoundTheUnitRow(
-    roundUp: Boolean,
+    useUSC: Boolean,
-    onRoundUpChanged: (Boolean) -> Unit,
+    onUnitChanged: (Boolean) -> Unit,
     modifier: Modifier = Modifier
 ) {
     Row(
         modifier = modifier.fillMaxWidth(),
         verticalAlignment = Alignment.CenterVertically
     ) {
-        Text(text = stringResource(R.string.use_usc))
+        Text(
+            text = "Gunakan Unit (Metric/USC)",
+            color = MaterialTheme.colorScheme.onSurface
+        )
         Switch(
             modifier = Modifier
                 .fillMaxWidth()
                 .wrapContentWidth(Alignment.End),
-            checked = roundUp,
+            checked = useUSC,
-            onCheckedChange = onRoundUpChanged
+            onCheckedChange = onUnitChanged
         )
     }
 }
 
 /**
- * Calculates the BMI
+ * Menghitung BMI berdasarkan rumus yang digunakan
- *
- * Catatan: tambahkan unit test untuk kalkulasi BMI ini
- */
-private fun calculateBMI(BmiHeight: Double, BmiWeight: Double = 15.0, roundUp: Boolean): String {
-    var bmi = BmiWeight / 100 * BmiHeight
-    if (roundUp) {
-        bmi = kotlin.math.ceil(bmi)
-    }
-    return NumberFormat.getNumberInstance().format(bmi)
-}
-/**
- * Calculates the BMI Category
- *
- * Catatan: tambahkan unit test untuk kalkulasi BMI ini
  */
+internal fun calculateBMI(height: Double, weight: Double, useUSC: Boolean): String {
+    if (height == 0.0 || weight == 0.0) return "0.0"
 
-private fun calculateBMICategory(BmiHeight: Double, BmiWeight: Double = 15.0, roundUp: Boolean): String {
+    val bmi = if (useUSC) {
-    var bmi = BmiWeight / 100 * BmiHeight
+        // Rumus USC: 703 * (berat (lbs) / (tinggi (in)^2))
-    if (roundUp) {
+        703 * (weight / (height * height))
-        bmi = kotlin.math.ceil(bmi)
+    } else {
+        // Rumus Metric: berat (kg) / (tinggi (m)^2)
+        val heightInMeter = height / 100
+        weight / (heightInMeter * heightInMeter)
     }
-    return NumberFormat.getNumberInstance().format(bmi)
+
+    return DecimalFormat("#.0").format(bmi)
 }
+
+/**
+ * Menentukan kategori BMI
+ */
+internal fun calculateBMICategory(bmiString: String): String {
+    val bmi = bmiString.toDoubleOrNull() ?: 0.0
+    return when {
+        bmi < 18.5 -> "Underweight"
+        bmi < 25.0 -> "Normal weight"
+        bmi < 30.0 -> "Overweight"
+        bmi >= 30.0 -> "Obese"
+        else -> "Tidak diketahui"
+    }
+}
+
+/**
+ * Memberikan warna berdasarkan kategori BMI - menggunakan warna dari tema
+ */
+@Composable
+fun getCategoryColor(category: String): androidx.compose.ui.graphics.Color {
+    return when (category) {
+        "Underweight" -> androidx.compose.ui.graphics.Color(0xFF2196F3) // Biru
+        "Normal weight" -> androidx.compose.ui.graphics.Color(0xFF4CAF50) // Hijau
+        "Overweight" -> androidx.compose.ui.graphics.Color(0xFFFF9800) // Orange
+        "Obese" -> androidx.compose.ui.graphics.Color(0xFFF44336) // Merah
+        else -> MaterialTheme.colorScheme.onSurface
+    }
+}
+
 @Preview(showBackground = true)
 @Composable
 fun TipTimeLayoutPreview() {

app/src/main/res/mipmap-anydpi-v26/app_icon.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@mipmap/app_icon_background"/>
+    <foreground android:drawable="@mipmap/app_icon_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/app_icon_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@mipmap/app_icon_background"/>
+    <foreground android:drawable="@mipmap/app_icon_foreground"/>
+</adaptive-icon>