From b5db44764b5bcb2757d5465e38fc6f98c152d109 Mon Sep 17 00:00:00 2001
From: Raihan Ariq <202310715297@mhs.ubharajaya.ac.id>
Date: Thu, 6 Nov 2025 23:30:23 +0700
Subject: [PATCH] Pengkategorian Hasil BMI

---
 .../com/example/bmicalculator/MainActivity.kt | 25 +++++++++++++------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/app/src/main/java/com/example/bmicalculator/MainActivity.kt b/app/src/main/java/com/example/bmicalculator/MainActivity.kt
index 256387b..399901a 100644
--- a/app/src/main/java/com/example/bmicalculator/MainActivity.kt
+++ b/app/src/main/java/com/example/bmicalculator/MainActivity.kt
@@ -66,6 +66,7 @@ import androidx.compose.ui.unit.dp
 import com.example.bmicalculator.ui.theme.BMICalculatorTheme
 import java.text.DecimalFormat
 import java.text.NumberFormat
+import java.util.Locale
 import kotlin.math.pow
 
 class MainActivity : ComponentActivity() {
@@ -100,7 +101,7 @@ fun BMICalculatorLayout() {
     val BmiHeight   = heightInput.toDoubleOrNull() ?: 0.0
     val BmiWeight   = weightInput.toDoubleOrNull() ?: 0.0
     val bmi         = calculateBMI(BmiHeight, BmiWeight, unitUSC)
-    val category    = calculateBMICategory(BmiHeight, BmiWeight, unitUSC)
+    val category    = calculateBMICategory(bmi)
 
     Column(
         modifier = Modifier
@@ -212,29 +213,37 @@ private fun calculateBMI(BmiHeight: Double, BmiWeight: Double, unitUSC: Boolean)
         return "0"
     }
 
-    val heightInMeter   = BmiHeight/100 // konversi centimeter ke meter
+    val heightInMeter = BmiHeight/100 // konversi centimeter ke meter
 
     var bmi = BmiWeight / heightInMeter.pow(2)
     if (unitUSC == true) {
         bmi = 703 * (BmiWeight / BmiHeight.pow(2))
     }
-    
+
     val df = DecimalFormat("#.#")
     return df.format(bmi)
 }
 /**
  * Calculates the BMI Category
+ * bmi < 18.5 -> Underweight
+ * 18.5 <= bmi < 25 -> Normal
+ * 25 <= bmi <= 30 -> Normal
+ * bmi > 30 -> Overweight
  *
  * Catatan: tambahkan unit test untuk kalkulasi BMI ini
  */
+private fun calculateBMICategory(bmi: String): String {
+    val bmiValue = bmi.replace(",", ".").toDoubleOrNull() ?: return ""
 
-private fun calculateBMICategory(BmiHeight: Double, BmiWeight: Double = 15.0, unitUSC: Boolean): String {
-    var bmi = BmiWeight / 100 * BmiHeight
-    if (unitUSC) {
-        bmi = kotlin.math.ceil(bmi)
+    return when {
+        bmiValue == 0.0 -> ""
+        bmiValue < 18.5 -> "Underweight"
+        bmiValue < 25.0 -> "Normal"
+        bmiValue < 30.0 -> "Overweight"
+        else -> "Obesity"
     }
-    return NumberFormat.getNumberInstance().format(bmi)
 }
+
 @Preview(showBackground = true)
 @Composable
 fun TipTimeLayoutPreview() {